Pinpoint Tests — Non OSC Equipped Vehicleww2.justanswer.com/uploads/HE/heavychevy396/2012-11-16...2012/11/16 · 307-01-6 Automatic Transaxle/Transmission — 4F50N 307-01-6 DIAGNOSIS

307-01-1 307-01-1Automatic Transaxle/Transmission — 4F50N

DIAGNOSIS AND TESTINGSpecial Tool(s)Pinpoint Tests — Non OSC Equipped

Worldwide Diagnostic SystemVehicle(WDS)

Special Tool(s) Vehicle Communication Module(VCM) with appropriate

Transmission Tester adapters, or equivalent307-F016 (007-00130) or diagnostic toolequivalent

Transmission Adapter Cable307-F019 or equivalent

Trans Tester TR/MLP Overlayand Manual007-00131 or equivalent

AX4N Cable and Overlay007-00117 or equivalent MLP-TR Cable

418-F107 or equivalent

73III Digital Multimeter105-R0057 or equivalent

Any time an electrical connector or solenoid body isdisconnected, inspect the connector for terminalcondition, corrosion and contamination. Also inspectthe connector seal for damage. Clean, repair orBreakout Box, EEC-V Control

System install new components as required.418-049 (T94L-50-EEC-V) orequivalent

(Continued)

Digital Transmission Range (TR) Sensor Diagnosis Chart

PID: TR VPID: TR D (volts)

TR3A (PCMPin 64 to

signalSelectorTR4 TR3A TR2 TR1 return)Position PID: TR

PARK P/N 0 0 0 0 0.0 volts

In Between REV 0 1 0 0 1.3 - 1.8 volts

REVERSE REV 1 1 0 0 1.3 - 1.8 volts

In Between REV 0 1 0 0 1.3 - 1.8 volts

NEUTRAL NTRL 0 1 1 0 1.3 - 1.8 volts

In Between O/Da 1 1 1 0 1.3 - 1.8 volts

OVERDRIVE O/Da 1 1 1 1 1.3 - 1.8 volts

Copyright 2005, Ford Motor CompanyLast updated: 03/29/2005 2006 Taurus, 6/2005


DIAGNOSIS AND TESTING (Continued)

Digital Transmission Range (TR) Sensor Diagnosis Chart (Continued)

PID: TR VPID: TR D (volts)

TR3A (PCMPin 64 to

signalSelectorTR4 TR3A TR2 TR1 return)Position PID: TR

In Between Drive 1 0 1 1 0.0 volts

DRIVE Drive 1 0 0 1 0.0 volts

In Between Drive 1 0 1 1 0.0 volts

Manual 1 Man 1 0 0 1 1 0.0 volts

a Will read ‘‘DRIVE’’ if O/D is canceled

A. TR V is the voltage at the PCM Pin 64 (TR3A Shift Solenoid Pre-DiagnosisCircuit) to signal return.

Use the following shift solenoid operationB. ‘‘In Between’’ reading could be caused by a information when carrying out Pinpoint Test A.

shift cable or digital TR sensor misaligned or adigital TR sensor circuit failure of TR1, TR2,TR3A or TR4.

C. TR D: 1= Open digital TR switch, 0= Closeddigital TR switch.

D. EEC-V Control System Breakout Box Readings:Taken from PCM signal pins for TR1, TR2,TR3A and TR4 to signal return.

•Voltages for TR1, TR2 and TR4:

•0 = 0.0 volts

•1 = 9.0 - 14.0 volts

•Voltage for TR3A:

•0 = 0.0 volts

•1 = 1.3 - 1.8 volts

•1.8 - 5.0 volts = Invalid Reading (open in wiresor bad resistor in digital TR sensor).

Wiggle Test Information for Open/Shorts

A. TR4, TR3A, TR2 and TR1 are all closed in PARK.PARK is a good position to check for intermittentopen circuits (with diagnostic tool monitoringTR D).

B. TR4, TR3A, TR2 and TR1 are all open inOVERDRIVE, so OVERDRIVE is a good positionto check for shorts to ground. To determine theshorted components while observing TR D, unplugthe TR and see if the short goes away. If the shortis still present, unplug the transaxle harness and seeif the short goes away. If the short is still present,then the short is in the PCM or vehicle harness.Remove the suspect circuit(s) wire terminal from thePCM connector. If the short is still present, then thePCM has an internal failure. Otherwise, the failureis in the vehicle harness.

2006 Taurus, 6/2005



Solenoid Operation Chart

AX4N SolenoidsGear Selector PCM GearEng Brake SSA SSB SSCPosition Commanded

P/Na P/N NO OFFb ONb OFFa

R R YES OFF ON OFF

(D) 1 NO OFF ON OFF

2 NO OFF OFF OFF

3 NO ON OFF ON

4 YES ON ON ON

D (Drive) 1 NO OFF ON OFF

2 NO OFF OFF OFF

3 YES ON OFF OFF

Manual 1 1 YES OFF ON OFF

2c YES OFF OFF OFF

3c YES ON OFF OFF

a When transmission fluid temperature is below 38°C (100°F), then SSA=OFF, SSB=ON, SSC=ON to prevent coldcreep with foot off brake.

b Not contributing to powerflow.c When a manual pull-in occurs above a calibrated speed, the transaxle will downshift from the higher gear until the

vehicle speed drops below the calibrated speed.

Gear Selector PositionShift Solenoid Failure Mode Chart ‘‘Always SSB AlwaysOff’’ OD D 1aOffFailed OFF due to powertrain control module and/or 2 2 2 2vehicle wiring concerns, and/or solenoid electrically 3 3 3 3a

stuck off and/or hydraulically stuck off.4 3

Gear Selector PositionSSA Always a When a manual pull-in occurs above a calibratedOD D 1aOff speed, the transaxle will downshift from the higher

gear until the vehicle speed drops below thisPCM Gear Actual Gear Obtainedcalibrated speed.Commanded

1 1 1 1Gear Selector PositionSSC Always2 2 2 2

OD D 1aOff3 2 2 3a

PCM Gear Actual Gear Obtained4 1 Commanded

1 1 1 1a When a manual pull-in occurs above a calibratedspeed, the transaxle will downshift from the higher 2 2 2 2gear until the vehicle speed drops below this

3 3b 3 3acalibrated speed.

4 3

Gear Selector PositionSSB Always a When manual pull-in occurs above a calibratedOD D 1aOff speed, the transaxle will downshift from the higher

gear until the vehicle speed drops below thisPCM Gear Actual Gear Obtainedcalibrated speed.Commanded

b With engine braking.1 2 2 2

2006 Taurus, 6/2005



Gear Selector PositionShift Solenoid Failure Mode Chart ‘‘Always SSB AlwaysOn’’ OD D 1aOnFailed ON due to powertrain control module (PCM) PCM Gear Actual Gear Obtainedand/or vehicle wiring concerns; solenoid electrically Commandedor mechanically stuck on. 1 1 1 1

2 1 1 1Gear Selector PositionSSA Always3 4 3b 3OD D 1aOn4 4PCM Gear Actual Gear Obtained

Commanded a When a manual pull-in occurs above a calibrated1 3b 3 3 speed, the transaxle will downshift from the higher

gear until the vehicle speed drops below the2 3 3 3calibrated speed.

3 3 3 3 b SSC overrides forward clutch.

4 4

Gear Selector PositionSSC Alwaysa When a manual pull-in occurs above a calibratedOD D 1Onspeed, the transaxle will downshift from the higher

gear until the vehicle speed drops below the PCM Gear Actual Gear Obtainedcalibrated speed. Commanded

b SSC overrides forward clutch.1 1 1 1

2 2 2 2

3 3 3a 3

4 4

a No engine braking.

PINPOINT TEST A: SHIFT SOLENOID

NOTE: Refer to the Transaxle Internal Harness Diagram illustration preceding these pinpointtests.

NOTE: Refer to the Transaxle Vehicle Harness Connector illustration preceding these pinpointtests.

Test Step Result / Action to TakeA1 ELECTRONIC DIAGNOSTICS

• Check to make sure the transaxle harness connector is fullyseated, terminals are engaged in connector and in goodcondition before proceeding. Yes• Connect the diagnostic tool. REMAIN in OTM. GO to A2.• Carry out the KOEO Test until continuous DTCs have beendisplayed. No

• Enter the Output Test Mode (OTM). PRESS START. If vehicle does not enter• Select the mode ALL ON. Push START to turn outputs ON. OTM, REFER to the Powertrain

Push STOP to turn outputs OFF. Control/Emissions Diagnosis (PC/ED)• Does vehicle enter OTM? manual.

A2 CHECK THE ELECTRICAL SIGNAL OPERATION• Disconnect: Transaxle Vehicle Harness Connector.

CAUTION: Do not pry on the connector. This willdamage the connector and could result in a transaxleconcern. Pull up on the connector harness.Disconnect the transaxle vehicle harness connector.

• Use a mirror to inspect both ends of the connector for damageor pushed out pins, corrosion, loose wires and missing ordamaged seals.

• Connect a volt ohmmeter (VOM) positive lead to VPWR pin 2and the negative test lead to the appropriate solenoid circuit pin1, 6 and pin 8 of the vehicle harness connector.

(Continued)

2006 Taurus, 6/2005


DIAGNOSIS AND TESTING (Continued)PINPOINT TEST A: SHIFT SOLENOID (Continued)

Test Step Result / Action to TakeA2 CHECK THE ELECTRICAL SIGNAL OPERATION (Continued)

Pin Shift Solenoid

1 SSA

6 SSB

8 SSC

• Place the VOM on the 20-volt scale. Yes• While observing the VOM, press START and STOP to cycle the GO to A5.solenoid output ON and OFF.• Does the suspect solenoid output voltage change at least No

0.5 volts? GO to A3.A3 CHECK THE CONTINUITY OF THE SOLENOID SIGNAL AND

VPWR HARNESS CIRCUITS• Key in OFF position.• Disconnect: Transaxle Vehicle Harness Connector.• Disconnect: Powertrain Control Module (PCM).• Inspect for damaged or pushed out pins, corrosion or loose

wires.• Install the electrical engine control (EEC)-V Control System

Breakout Box.• Measure the resistance between PCM signal test pin 27 at the

EEC-V Control System Breakout Box and SSA signal test pin 1at the transaxle harness connector.

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeA3 CHECK THE CONTINUITY OF THE SOLENOID SIGNAL AND

VPWR HARNESS CIRCUITS (Continued)

• Measure the resistance between PCM signal test pin 1 at theEEC-V Control System Breakout Box and SSB signal test pin 6at the transaxle harness connector.

• Measure the resistance between PCM signal test pin 53 at theEEC-V Control System Breakout Box and SSC signal test pin 8at the transaxle harness connector.

• Measure the resistance between PCM signal test pin 71 at theEEC-V Control System Breakout Box and signal test pin 2 at thetransaxle harness connector.

YesGO to A4.NoREPAIR the open circuit(s). REMOVE theEEC-V Control System Breakout Box.RECONNECT all of the components.

• Is each resistance less than 5 ohms? REPEAT the Quick Tests.A4 CHECK THE SOLENOID HARNESS FOR A SHORT TO POWER

AND GROUND• Key in OFF position.• Disconnect: Transaxle Harness Connector.• Disconnect: Powertrain Control Module (PCM).

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeA4 CHECK THE SOLENOID HARNESS FOR A SHORT TO POWER

AND GROUND (Continued)

• Install the EEC-V Control System Breakout Box.• Measure the resistance between PCM signal output pin 1 and

test pin 71 at the EEC-V Control System Breakout Box.

• Measure the resistance between PCM signal output pin 53 andtest pin 71 at the EEC-V Control System Breakout Box.

• Measure the resistance between PCM signal output pin 27 andtest pin 71 at the EEC-V Control System Breakout Box.

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeA4 CHECK THE SOLENOID HARNESS FOR A SHORT TO POWER

AND GROUND (Continued)

• Measure the resistance between PCM signal output pin 27 andtest pins 24, 25, 51, 76, 77, 91 and 103 at the EEC-V ControlSystem Breakout Box and chassis ground.



YesGO to A5.NoREPAIR the short circuit(s). REMOVE theEEC-V Control System Breakout Box.RECONNECT all of the components.

• Is each resistance greater than 10,000 ohms? REPEAT the Quick Tests.

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeA5 TRANSMISSION FUNCTIONAL TEST

• Disconnect: Transaxle Vehicle Harness Connector.


• Connect the transmission tester.• NOTE: LED will turn GREEN when solenoid activates and turn

OFF when deactivated. LED will turn RED if an ACTIVATEDsolenoid/harness is shorted to battery positive. LED will remainOFF if an ACTIVATED solenoid/harness is shorted to ground or

Yesno continuity (open circuit).GO to A6.Carry out all Static Testing — Engine OFF procedures for the

shift solenoids. Refer to the transmission tester manual. No• Does solenoid (LED GREEN) activate? GO to A7.

A6 TRANSMISSION DRIVE TEST• Reconnect the PCM. Yes• Carry out Dynamic Testing — Engine ON. Refer to the INSTALL a new PCM. ERASE all codes

transmission tester manual. and CARRY OUT the Transaxle Drive• Does the vehicle upshift when commanded by the tester? Cycle Test. REFER to Transaxle Drive

Cycle Test in this section. RERUN theQuick Test. If DTCs are still present,REFER to Diagnosis By Symptom in thissection.NoGO to A7.

A7 CHECK THE RESISTANCE OF THE SOLENOID/HARNESSNOTE: Refer to the transmission tester for terminal locations.• Place the Bench/Drive switch to BENCH mode.• Rotate the Gear Select switch to the OHMS CHECK position.• Connect the ohmmeter negative lead to the SS-1 jack and the

positive lead to the VPWR jack on the tester.

• Record the resistance. The resistance should be between 15and 30 ohms.

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeA7 CHECK THE RESISTANCE OF THE SOLENOID/HARNESS

(Continued)

• Connect the ohmmeter negative lead to the SS-2 jack and thepositive lead to the VPWR jack on the tester.


YesGO to A8.

• Connect the ohmmeter negative lead to the SS-3 jack and theNopositive lead to the VPWR jack on the tester.NOTE: The out-of-specification condition• Record the resistance. The resistance should be between 15may be caused by internal harness orand 30 ohms.solenoid concerns.• Is the resistance for each solenoid between 15 and 30

ohms? GO to A9.A8 CHECK THE SOLENOID/HARNESS FOR A SHORT TO GROUND

• Check for continuity between the BAT(-) jack (engine ground)and the appropriate jack with an ohmmeter or other low currenttester (less than 200 milliamps).

Solenoid Tester Jack

SSA SS-1/VPWR

SSB SS-2/VPWR

SSC SS-3/VPWR

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeA8 CHECK THE SOLENOID/HARNESS FOR A SHORT TO GROUND

(Continued)

YesGO to A9.No

• Connection should show infinite resistance (no continuity). GO to the Diagnosis By Symptom in this• Does the connection show continuity? section.

A9 INTERNAL ELECTRONIC DIAGNOSTICS• Remove the transaxle side pan.• Check that the internal harness connector is fully engaged on

each shift solenoid. Yes• Check that the internal harness connector terminals are fully GO to A10.seated in the connector.• Inspect the connector for damage. No• Are the above in good condition and engaged correctly? REPAIR as required.

A10 CHECK THE INTERNAL HARNESS (CONTINUITY)• Disconnect: Internal Harness From Each Solenoid.

CAUTION: Do not probe into the connector terminals.This will damage the connector and could result in atransaxle concern.Disconnect the transaxle vehicle harness connector.

• For SSA, connect the positive lead from an ohmmeter to thetester jack SS-1 and the negative lead at the orange wire of the2-wire connector.

• Record the resistance. The resistance should be less than 0.5ohms.

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeA10 CHECK THE INTERNAL HARNESS (CONTINUITY) (Continued)

• For SSB, connect the positive lead from an ohmmeter to thetester jack SS-2 and the negative lead at the pink wire of the2-wire connector.


• For SSC, connect the positive lead from an ohmmeter to thetester jack SS-3 and the negative lead at the yellow wire of the2-wire connector.


• For VPWR, connect the positive lead from an ohmmeter to thetester jack VPWR and the negative lead to the red wire of the2-wire connector.


(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeA10 CHECK THE INTERNAL HARNESS (CONTINUITY) (Continued)




YesGO to A11.

• Record the resistance. The resistance should be less than 0.5 Noohms. INSTALL a new internal harness. GO to

• Is the resistance for each solenoid less than 0.5 ohms? A12.A11 CHECK THE INTERNAL HARNESS (SHORT TO GROUND)

• Check for continuity between BAT(-) jack (engine ground) andthe appropriate wire at each solenoid with an ohmmeter or otherlow current tester (less than 200 milliamps).

SolenoidConnector Wire VPWR

SSA Orange Red

SSB Pink Red

SSC Yellow Red

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeA11 CHECK THE INTERNAL HARNESS (SHORT TO GROUND)

(Continued)

YesINSTALL a new internal harness. GO toA12.

• Connection should show infinite resistance (no continuity). No• Does the connection show continuity? GO to A12.

A12 CHECK THE SOLENOID RESISTANCE AT THE SOLENOID• For SSA, connect the ohmmeter to the negative terminal of the

solenoid and to the positive terminal of the solenoid.


• For SSB, connect the ohmmeter to the negative terminal of thesolenoid and to the positive terminal of the solenoid.


(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeA12 CHECK THE SOLENOID RESISTANCE AT THE SOLENOID

(Continued)

• For SSC, connect the ohmmeter to the negative terminal of thesolenoid and to the positive terminal of the solenoid.

Yes• Record the resistance. The resistance should be between 15 GO to A13.and 30 ohms.• Is the resistance for each solenoid between 15 and 30 No

ohms? INSTALL a new solenoid assembly.A13 CHECK THE SOLENOID FOR A SHORT TO GROUND

• Check for continuity between the BAT(-) (engine ground) and theappropriate shift solenoid terminal with an ohmmeter or otherlow current tester (less than 200 milliamps).

Solenoid Terminal

SSA +/-

SSB +/-

SSC +/-

YesINSTALL a new solenoid assembly.No

• Connection should show infinite resistance (no continuity). REFER to Diagnosis By Symptom in this• Does the connection show continuity? section.

2006 Taurus, 6/2005


DIAGNOSIS AND TESTING (Continued)PINPOINT TEST B: TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR



Test Step Result / Action to TakeB1 ELECTRONIC DIAGNOSTICS

• Check to make sure the transaxle harness connector is fully Yesseated, terminals are fully engaged in connector and in good GO to B2.condition before proceeding. No• Have the above items been checked? CARRY OUT checks. ERASE the codes.

REPEAT the Quick Tests.B2 CHECK THE ELECTRICAL SIGNAL OPERATION

• Key in OFF position.• Disconnect: Transaxle Vehicle Harness Connector.

CAUTION: Do not pry on the connector. This willdamage the connector and could result in a transaxleconcern. Pull up on the connector harness.Disconnect the transaxle vehicle connector.


• Connect a VOM positive lead to the transmission fluidtemperature (TFT) circuit pin 5 and the negative test lead to thesignal return (SIG RTN) pin 9 of the transaxle vehicle harnessconnector.

YesGO to B7.• Place the VOM on the 20-volt scale.

• Key in ON position. No• Is the voltage between 4.75 and 5.25 volts? GO to B3.

B3 CHECK THE CONTINUITY OF THE TFT AND SIG RTN CIRCUITS• Key in OFF position.• Disconnect: Transaxle Vehicle Harness Connector.• Disconnect: Powertrain Control Module (PCM).• Inspect for damaged or pushed out pins, corrosion or loose

wires.• Install the EEC-V Control System Breakout Box.

(Continued)

2006 Taurus, 6/2005


DIAGNOSIS AND TESTING (Continued)PINPOINT TEST B: TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR (Continued)

Test Step Result / Action to TakeB3 CHECK THE CONTINUITY OF THE TFT AND SIG RTN CIRCUITS

(Continued)

• Measure the resistance between PCM signal test pin 37 at theEEC-V Control System Breakout Box and signal test pin 5 at thetransaxle vehicle harness connector.

• Measure the resistance between PCM signal test pin 91 at theEEC-V Control System Breakout Box and signal test pin 9 at thetransaxle vehicle harness connector.

YesGO to B4.NoREPAIR the open circuits. REMOVE theEEC-V Control System Breakout Box.RECONNECT all of the components.

• Is each resistance less than 5 ohms? REPEAT the Quick Tests.B4 CHECK THE TFT CIRCUIT FOR A SHORT TO VPWR AND

GROUND• Inspect for damaged or pushed out pins, corrosion or loose

wires.• Measure the resistance between TFT test pin 37 and test pin 71

at the EEC-V Control System Breakout Box.

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeB4 CHECK THE TFT CIRCUIT FOR A SHORT TO VPWR AND

GROUND (Continued)

• Measure the resistance between TFT test pin 37 and chassisground, pins 24, 25, 51, 76, 77, 91 and 103.

YesGO to B5.NoREPAIR the short circuit(s). REMOVE theEEC-V Control System Breakout Box.RECONNECT all of the components.

• Is each resistance greater than 10,000 ohms? REPEAT the Quick Tests.B5 CHECK THE RESISTANCE OF THE TFT SENSORS/HARNESS

• Vehicle must be at normal operating temperature.• Disconnect: Transaxle Vehicle Harness Connector.


• Connect the transmission tester.• Set the Bench/Drive switch to BENCH mode.• Rotate the Gear Select switch to OHMS CHECK position.• NOTE: While carrying out test 1 and 2, observe the resistance.

DTC P0713 is set if resistance value exceeds 869 K ohms(open circuit). DTC P0712 is set if resistance value falls below597 ohms (short circuit).Connect the ohmmeter negative lead to the -TFT jack and thepositive lead to the +TFT jack on the tester.

• TEST 1.• Record the resistance.• Resistance should be approximately in the following ranges:

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeB5 CHECK THE RESISTANCE OF THE TFT SENSORS/HARNESS

(Continued)

Transmission Fluid Temperature

°C °F Resistance (Ohms)

-40 to -20 -40 to -4 967 K-284 K

-19 to -1 -3 to 31 284 K-100 K

0-20 32-68 100 K-37 K

21-40 69-104 37 K-16 K

41-70 105-158 16 K-5 K

71-90 159-194 5 K-2.7 K

91-110 195-230 2.7 K-1.5 K

111-130 231-266 1.5 K-0.8 K

131-150 267-302 0.8 K-0.54 K

• TEST 2.• Check for intermittent short or open.• If the resistance was between 0.8 K and 100 K ohms, carry out

the following test. If the transaxle is warm, allow it to cool.Check the transmission fluid temperature sensor resistanceagain. Compare the resistance with the initial resistance. Theresistance should decrease if the transaxle was heated and Yesshould increase if the transaxle was allowed to cool. If correct, GO to B6.then change in the resistance occurs, repeat On-BoardDiagnostic. No

• Is the resistance in the range? GO to B7.B6 CHECK THE SENSOR/HARNESS FOR A SHORT TO GROUND

• Check for continuity between the BAT(-) jack (engine ground)and the appropriate jack (-TFT or +TFT) with an ohmmeter orother low current tester (less than 200 milliamps).

YesGO to B7.NoINSTALL a new PCM. REPEAT the OBD

• Connection should show infinite resistance (no continuity). Tests. If the DTC is still present, GO to• Does the connection show continuity? B7.

B7 INTERNAL ELECTRONIC DIAGNOSTICS• Remove the transaxle side pan.• Check that the internal harness connector is fully engaged on

the TFT sensor. Yes• Check that the internal harness connector terminals are fully GO to B8.seated in the connector.• Inspect the connector for damage. No• Are the above in good condition? REPAIR as required.

B8 CHECK THE INTERNAL HARNESS (CONTINUITY)• Disconnect: Internal Harness From TFT Sensor.

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeB8 CHECK THE INTERNAL HARNESS (CONTINUITY) (Continued)

• CAUTION: Do not probe into the connector terminals.This will damage the connector and could result in atransaxle concern.For the TFT sensor, connect the positive lead from an ohmmeterto the tester +TFT jack and the negative lead at the black wireof the TFT sensor connector.


• Connect the positive lead from an ohmmeter to the tester -TFTjack and the negative lead at the white wire of the TFT sensorconnector.

YesGO to B9.


• Is the resistance less than 0.5 ohms? B10.B9 CHECK THE INTERNAL HARNESS (SHORT TO GROUND)

• Check for continuity between BAT(-) jack (engine ground) andthe appropriate wire (+TFT and -TFT) with an ohmmeter or otherlow current tester (less than 200 milliamps).

Sensor Wire

TFT+ Black

TFT- White

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeB9 CHECK THE INTERNAL HARNESS (SHORT TO GROUND)

(Continued)

YesINSTALL a new internal harness. GO toB10.

• Connection should show infinite resistance (no continuity). No• Does the connection show continuity? GO to B10.

B10 CHECK THE TFT SENSOR RESISTANCE• Check the sensor resistance by connecting an ohmmeter at the

terminals of the TFT sensor assembly.

• Record the resistance.• The resistance should be in range of the temperature of the

vehicle.• The resistance should be approximately in the following ranges:

Transmission Fluid Temperature

°C °F Resistance (Ohms)

-40 to -20 -40 to -4 967 K-284 K

-19 to -1 -3 to 31 284 K-100 K

0-20 32-68 100 K-37 K

21-40 69-104 437 K-16 K

41-70 105-158 16 K-5 K

71-90 159-194 5 K-2.7 K

91-110 195-230 2.7 K-1.5 K

111-130 231-266 1.5 K-0.8 K YesGO to B11.131-150 267-302 0.8 K-0.54 KNo

• Is the resistance in the range? INSTALL a new TFT sensor.

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeB11 CHECK THE TFT SENSOR FOR SHORT TO GROUND

• Check for continuity between BAT(-) jack (engine ground) andthe appropriate terminal with an ohmmeter or other low currenttester (less than 200 milliamps).

Sensor Wire

TFT +/-

YesINSTALL a new TFT sensor.NoREPEAT the Quick Test. If codes arepresent and an overtemperature conditionexisted, CHECK the fluid condition.CHECK the overheat condition. REFER toDiagnosis By Symptom in this section.

• Connection should show infinite resistance (no continuity). REPAIR as required. REPEAT the Quick• Does the connection show continuity? Tests.

PINPOINT TEST C: TORQUE CONVERTER CLUTCH (TCC) SOLENOID



Test Step Result / Action to TakeC1 ELECTRONIC DIAGNOSTICS

• Check to make sure the transaxle harness connector is fullyseated, terminals are engaged in connector and in goodcondition before proceeding. Yes• Connect the diagnostic tool. REMAIN in OTM. GO to C2.• Carry out the KOEO test until continuous DTCs have beendisplayed. No

• Enter the Output Test Mode (OTM). PRESS START. If vehicle does not enter• Select the mode ALL ON. Push START to turn outputs ON. OTM, REFER to the Powertrain

Push STOP to turn outputs OFF. Control/Emissions Diagnosis (PC/ED)• Does vehicle enter OTM? manual.

C2 CHECK THE ELECTRICAL SIGNAL OPERATION• Disconnect: Transaxle Vehicle Harness Connector.



(Continued)

2006 Taurus, 6/2005


DIAGNOSIS AND TESTING (Continued)PINPOINT TEST C: TORQUE CONVERTER CLUTCH (TCC) SOLENOID (Continued)

Test Step Result / Action to TakeC2 CHECK THE ELECTRICAL SIGNAL OPERATION (Continued)

• Connect a VOM positive lead to VPWR pin 2 and the negativetest lead to the solenoid circuit pin 3 of the transaxle vehicleharness connector.

• Place the VOM on the 20-volt scale. Yes• While observing the VOM, press START and STOP to cycle the GO to C5.solenoid output ON and OFF.• Does the suspect solenoid output voltage change at least No

0.5 volts? GO to C3.C3 CHECK THE CONTINUITY OF THE SOLENOID SIGNAL AND

VPWR HARNESS CIRCUITS• Key in OFF position.• Disconnect: Powertrain Control Module (PCM).• Inspect for damaged or pushed out pins, corrosion or loose

wires.• Install the EEC-V Control System Breakout Box.• Measure the resistance between PCM signal output test pin 54

at the EEC-V Control System Breakout Box and signal test pin 3at the transaxle harness connector.

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeC3 CHECK THE CONTINUITY OF THE SOLENOID SIGNAL AND

VPWR HARNESS CIRCUITS (Continued)

• Measure the resistance between PCM power test pin 71 at theEEC-V Control System Breakout Box and power test pin 2 at thetransaxle harness connector.

YesGO to C4.NoREPAIR the open circuits. REMOVE theEEC-V Control System Breakout Box.RECONNECT all of the components.

• Is each resistance less than 5 ohms? REPEAT the Quick Tests.C4 CHECK THE SOLENOID HARNESS FOR A SHORT TO POWER

AND GROUND• Disconnect: Transaxle Vehicle Harness Connector.• Install the EEC-V Control System Breakout Box.• Measure the resistance between PCM signal output pin 54 and

test pin 71 at the EEC-V Control System Breakout Box.


YesGO to C7.NoREPAIR the short circuit(s). REMOVE theEEC-V Control System Breakout Box.RECONNECT all of the components.

• Is each resistance greater than 10,000 ohms? REPEAT the Quick Tests.

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeC5 TRANSMISSION FUNCTIONAL TEST

• Disconnect: Transaxle Vehicle Harness Connector.


• Install a transmission tester to the transaxle harness connector.• NOTE: LED will turn GREEN when torque converter clutch

solenoid (TCC solenoid) activates and turn OFF whendeactivated. LED will turn RED if an ACTIVATEDsolenoid/harness is shorted to battery positive. LED will remainOFF if an ACTIVATED solenoid/harness is shorted to ground orno continuity (open circuit).Use the tests to carry out all Static Testing — Engine OFF Yesprocedures for torque converter clutch solenoid. Refer to the GO to C6.transmission tester manual.

• Does TCC (LED GREEN) activate when tester switch is Nopressed? GO to C7.

C6 TRANSMISSION DRIVE TEST• Connect: Powertrain Control Module PCM. Yes• Connect the PCM. INSTALL a new PCM. ERASE all DTCs.• Carry out the Dynamic Testing — Engine ON procedures for the ROAD TEST; RERUN the Self-Test. Iftorque converter clutch solenoid. Refer to transmission tester symptoms are still present, REFER tomanual. Diagnosis By Symptom in this section.• While in 2nd gear at 48 km/h (30 mph), press the TCC switch.• Does the torque converter clutch solenoid activate (LED No

GREEN) and does the engine rpm drop? GO to C7.C7 CHECK THE RESISTANCE OF THE SOLENOID/HARNESS

NOTE: Refer to the Transmission Tester for terminal locations.• Place the Bench/Drive switch to BENCH mode.• Rotate the Gear Select switch to the OHMS CHECK position.• Connect the ohmmeter negative lead to the TCC jack and the

positive lead to the VPWR jack on the tester. This is to test theTCC solenoid.

YesGO to C8.NoNOTE: Internal harness or TCC solenoid• Record the resistance.may be damaged.• The resistance should be between 13 and 24 ohms.

• Is the resistance between 13 and 24 ohms? GO to C9.C8 CHECK THE SOLENOID/HARNESS FOR A SHORT TO GROUND

• Check for continuity between the BAT(-) jack (engine ground)and the appropriate jack with an ohmmeter or other low currenttester (less than 200 milliamps).


TCC TCC/VPWR

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeC8 CHECK THE SOLENOID/HARNESS FOR A SHORT TO GROUND

(Continued)

YesGO to C9.No


C9 INTERNAL ELECTRONIC DIAGNOSTICS• Remove the transaxle side pan.• Check that the internal harness connector is fully engaged on

the TCC solenoid assembly. Yes• Check that the internal harness connector terminals are fully GO to C10.seated in the connector.• Inspect the connector for damage. No• Are the above in good condition and engaged correctly? REPAIR as required.

C10 CHECK THE INTERNAL HARNESS (CONTINUITY)• Disconnect: Internal Harness From TCC Solenoid.

CAUTION: Do not probe into the connector terminals.This will damage the connector and could result in atransaxle concern.Disconnect the internal harness from TCC solenoid.

• Connect the positive lead from an ohmmeter to the tester TCCjack and the negative lead at the brown wire of the TCCconnector.


(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeC10 CHECK THE INTERNAL HARNESS (CONTINUITY) (Continued)

• Connect the positive lead from an ohmmeter to the tester VPWRjack and the negative lead to the red wire of the TCC connector.

YesGO to C11.


• Is the resistance for each solenoid less than 0.5 ohms? C12.C11 CHECK THE INTERNAL HARNESS (SHORT TO GROUND)

• Check for continuity between BAT(-) jack (engine ground) andthe appropriate wire with an ohmmeter or other low currenttester (less than 200 milliamps).

Solenoid Wire

TCC BrownGreen

YesINSTALL a new internal harness. GO toC12.

• Connection should show infinite resistance (no continuity). No• Does the connection show continuity? GO to C12.

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeC12 CHECK THE SOLENOID RESISTANCE

• For the TCC, check the solenoid resistance by connecting anohmmeter to the terminals of the TCC solenoid assembly.

YesGO to C13.• Record the resistance. The resistance should be between 13

and 24 ohms. No• Is the resistance between 13 and 24 ohms? INSTALL a new TCC solenoid.

C13 CHECK THE SOLENOID FOR A SHORT TO GROUND• Check for continuity between BAT(-) jack (engine ground) and

the appropriate solenoid terminals with an ohmmeter or otherlow current tester (less than 200 milliamps).

Solenoid Terminal

TCC +/-

YesINSTALL a new TCC solenoid.No


PINPOINT TEST D: DIGITAL TRANSMISSION RANGE (TR) SENSOR

NOTE: Refer to the Digital Transmission Range (TR) Sensor Connector illustration precedingthese pinpoint tests.

NOTE: Refer to the Digital Transmission Range (TR) Sensor Diagnosis Chart preceding thesespinpoint tests.

Test Step Result / Action to TakeD1 VERIFY DIAGNOSTIC TROUBLE CODES

• Key in OFF position.

(Continued)

2006 Taurus, 6/2005


DIAGNOSIS AND TESTING (Continued)PINPOINT TEST D: DIGITAL TRANSMISSION RANGE (TR) SENSOR (Continued)

Test Step Result / Action to TakeD1 VERIFY DIAGNOSTIC TROUBLE CODES (Continued)

• Select PARK. Yes• Carry out the On-Board Diagnostics Test. DTC codes P0705 GO to D4.and P0708 cannot be set by an incorrectly adjusted digital TRsensor. No

• Are only DTC codes P0705, P0708 present? GO to D2.D2 VERIFY DIGITAL TRANSMISSION RANGE SENSOR

• Key in OFF position.• Select PARK.• Check to make sure the digital TR sensor harness connector is Yesfully seated, terminals are fully engaged in connector and in GO to D3.good condition before proceeding.• Apply the parking brake. No• Select NEUTRAL. ADJUST the digital TR sensor. REFER to• Disconnect the shift cable/linkage from the manual lever. Digital Transmission (TR) Sensor in this• Verify that the digital TR Sensor Alignment Tool fits in the section. PLACE transmission range

appropriate slots. The tool is designed to fit snugly. selector lever into PARK and CLEAR• Is the digital TR sensor correctly adjusted? DTCs. RERUN OBD Tests. GO to D3.

D3 VERIFY SHIFT CABLE/LINKAGE ADJUSTMENT• Place the transaxle manual lever in the overdrive position. Yes• Select OVERDRIVE. GO to D4.• Reconnect the shift cable/linkage.• Verify that the shift cable/linkage is correctly adjusted. Refer to No

Section 307-05. ADJUST the shift cable/linkage. REFER to• Is the shift cable/linkage correctly adjusted? Section 307-05. GO to D4.

D4 CHECK THE ELECTRICAL SIGNAL OPERATION• Select PARK.

Yes• Disconnect: Digital TR Sensor.REPAIR as required. CLEAR DTCs andRERUN OBD Tests.CAUTION: Do not pry on connector. This will damageNothe connector and result in a transmission concern.If diagnosing a DTC, GO to D5.Press button and pull out on the digital TR harness connector.

• Inspect both ends of the connector for damaged or pushed-out If diagnosing a starting concern, backuppins, corrosion, loose wires and missing or damaged seals. lamp concern, or a Neutral Sense

• Is there damage to the connector, pins or harness? concern, GO to D10.D5 CHECK ELECTRICAL SYSTEM OPERATION (DIGITAL TR AND

PCM)• Key in OFF position.

Connect the diagnostic tool.• Connect: Digital TR Sensor.• Key in ON position.• Enter the following diagnostic mode on the scan tool: TR PIDS

TR, TR D, TR V.• Move the transmission range selector lever into each gear and

stop.• Observe any of the following PIDs (vehicle-dependent), TR and YesTR D, TR V while wiggling harness, tapping on sensor or The problem is not in the digital TR sensordriving the vehicle. Use PIDs TR, and TR D for DTCs P0705, system. REFER to Diagnosis By SymptomP1704, and P1705. Use PIDs TR, and TR V for DTC P0708. in this section for further diagnosis.• Compare the PIDs to the Digital Transmission Range (TR)

Sensor Diagnosis Chart. No• Do the PIDs TR, TR D and TR V match the Digital If TR D changes when wiggling harness,

Transmission Range (TR) Sensor Diagnosis chart, and does tapping on the sensor or driving thethe TR D PID remain steady when the harness is wiggled, vehicle, the problem may be intermittent.the sensor is tapped on or the vehicle driven? GO to D6.

D6 CHECK DIGITAL TRANSMISSION RANGE SENSOR OPERATION• Disconnect: Digital TR Sensor Connector.

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeD6 CHECK DIGITAL TRANSMISSION RANGE SENSOR OPERATION

(Continued)

• Connect: TR-E Cable to Transmission Tester.YesConnect tester cable ‘‘E’’ to tester.Concern is not in the digital TR sensor.• Connect: TR-E Cable to Digital TR Sensor.GO to D7.Connect cable ‘‘E’’ with BLACK marked ‘‘DIGITAL’’ to sensor.

• Place the digital TR overlay onto the transmission tester. No• Carry out the Sensor Test as instructed on the digital TR INSTALL a new digital TR sensor and

overlay. ADJUST. REFER to Digital Transmission• Does the status lamp on the tester TR-E cable match the Range (TR) Sensor in this section. CLEAR

selected gear positions? DTCs and RERUN OBD Tests.D7 CHECK PCM HARNESS CIRCUITS FOR OPENS

NOTE: Refer to schematic diagram and illustration preceding thepinpoint tests.• Key in OFF position.• Disconnect: Powertrain Control Module Connector.

Inspect for damaged or pushed out pins, corrosion or loosewires.

• Disconnect: Digital TR Sensor Connector.

CAUTION: Do not pry on the connector. This willdamage the connector and result in a transaxle concern.Press the button and pull out the harness connector.Disconnect the digital TR sensor connector.

• Install the EEC-V Control System Breakout Box.• Measure the resistance between PCM test pin 91 at the EEC-V

Control System Breakout Box and signal return circuit pin at TRharness connector pin 2.

• Measure the resistance between PCM test pin 64 at the EEC-VControl System Breakout Box and TR3A circuit pin at TRharness connector pin 3.

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeD7 CHECK PCM HARNESS CIRCUITS FOR OPENS (Continued)

• Measure the resistance between PCM test pin 3 at the EEC-VControl System Breakout Box and TR1 circuit pin at TR harnessconnector pin 4.



YesGO to D8.NoREPAIR open circuit(s). RECONNECT allcomponents. CLEAR DTCs. RERUN OBD

• Are all resistances less than 5 ohms? Tests.

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeD8 CHECK PCM HARNESS CIRCUITS FOR A SHORT TO GROUND

OR POWER• Measure the resistance between PCM test pin 91 and test pin

71 at the EEC-V Control System Breakout Box.

• Measure the resistance between PCM test pin 3 and test pins24, 25, 51, 71, 76, 77, 91 and 103 at the EEC-V Control SystemBreakout Box and ground.


(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeD8 CHECK PCM HARNESS CIRCUITS FOR A SHORT TO GROUND

OR POWER (Continued)



YesGO to D9.NoREPAIR short circuit(s). RECONNECT allcomponents. CLEAR DTCs. RERUN OBD

• Are all resistances greater than 10,000 ohms? Tests.D9 CHECK FOR A SHORT BETWEEN TR/PCM INPUT SIGNAL C

• Measure the resistance between test pin 3 and pins 49, 50 and64 at the EEC-V Control System Breakout Box.

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeD9 CHECK FOR A SHORT BETWEEN TR/PCM INPUT SIGNAL C

(Continued)




YesINSTALL a new powertrain controlmodule. CONNECT all components.CLEAR DTCs and RERUN OBD Tests.NoREPAIR shorts on circuits having lessthan 10,000 ohms between other TR/PCMinput signal circuits. RECONNECT allcomponents. CLEAR DTCs and RERUN

• Are all resistances more than 10,000 ohms? OBD Tests.

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeD10 CHECK THE NON PCM INTERNAL CIRCUITS OF THE SENSOR

• Connect: TR-E Cable to Transmission Tester. YesConcern is not in the digital TR sensor.Connect the tester cable ‘‘E’’ to the tester.For starter system concerns, REFER to• Connect: TR-E Cable to Digital TR Sensor.Section 303-06. For backup lampConnect cable ‘‘E’’ with BLACK marked ‘‘DIGITAL’’ to sensor. concerns, REFER to Section 417-01.• Set the switch on the ‘‘E’’ cable to digital.

• Place the digital TR overlay onto the transmission tester. No• Carry out the Switch Test as instructed on the digital TR overlay. INSTALL a new digital TR sensor and• Does the status lamp on the tester indicate RED for the ADJUST. CLEAR DTCs and RERUN OBD

correct gear position? Tests.

PINPOINT TEST E: ELECTRONIC PRESSURE CONTROL (EPC) SOLENOID



Test Step Result / Action to TakeE1 ELECTRONIC DIAGNOSTICS

• Check to make sure the transaxle harness connector is fullyseated, terminals are engaged in connector and in goodcondition before proceeding. Yes• Connect the diagnostic tool. REMAIN in OTM. GO to E2.• Carry out the KOEO Test until continuous DTCs have beendisplayed. No

• ENTER the Output Test Mode (OTM). PRESS START. If the vehicle does not• Select the mode ALL ON. Push START to turn outputs ON. enter OTM, REFER to the Powertrain

Push STOP to turn outputs OFF. Control/Emissions Diagnosis (PC/ED)• Does the vehicle enter Output State OTM? manual.

E2 CHECK THE ELECTRICAL SIGNAL OPERATION• Disconnect: Transaxle Vehicle Harness Connector.



• Connect a VOM positive lead to VPWR pin 7 and the negativetest lead to the solenoid circuit pin 10 of the transaxle vehicleharness connector.

• Place the VOM on the 20-volt scale. Yes• While observing the VOM, press START and STOP to cycle GO to E5.solenoid output ON and OFF.• Does the suspect solenoid output voltage change at least No

0.5 volt? GO to E3.

(Continued)

2006 Taurus, 6/2005


DIAGNOSIS AND TESTING (Continued)PINPOINT TEST E: ELECTRONIC PRESSURE CONTROL (EPC) SOLENOID (Continued)

Test Step Result / Action to TakeE3 CHECK THE CONTINUITY OF THE SOLENOID SIGNAL AND

VPWR HARNESS CIRCUITS• Key in OFF position.• Disconnect: Powertrain Control Module (PCM).

Inspect for damaged or pushed out pins, corrosion or loosewires.

• Install the EEC-V Control System Breakout Box.• Measure the resistance between PCM signal test pin 7 at the

EEC-V Control System Breakout Box and EPC PWR circuit pin7 at the transaxle vehicle harness connector.

• Measure the resistance between PCM signal test pin 81 at theEEC-V Control System Breakout Box and EPC signal pin 10 atthe transaxle harness connector.

YesGO to E4.NoREPAIR the open circuit(s). REMOVE theEEC-V Control System Breakout Box.CONNECT all of the components. ERASE

• Is each resistance less than 5 ohms? the codes and RERUN the OBD Tests.E4 CHECK THE HARNESS FOR A SHORT TO POWER AND

GROUND• Disconnect: Transaxle Harness Connector.

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeE4 CHECK THE HARNESS FOR A SHORT TO POWER AND

GROUND (Continued)

• Measure the resistance between EPC circuit PCM test pin 81and pin 7 at the EEC-V Control System Breakout Box.

• Measure the resistance between EPC circuit PCM test pin 81and test pins 24, 25, 51, 76, 77, 91 and 103 at EEC-V ControlSystem Breakout Box.

YesGO to E5.NoREPAIR the short circuit(s). REMOVE theEEC-V Control System Breakout Box.RECONNECT all of the components.ERASE the codes and RERUN the OBD

• Is each resistance greater than 10,000 ohms? Tests.E5 TRANSMISSION FUNCTIONAL TEST

CAUTION: Do not pry on the connector. This willdamage the connector and could result in a transaxle concern.Pull up on the connector harness.• Connect: PCM.• Install a line pressure gauge at the line tap on the transaxle

case.• Disconnect: Transaxle Vehicle Harness.• Connect: Transmission Tester.• Set the Bench/Drive switch to DRIVE mode.• Rotate the Gear Select switch to first gear position.• NOTE: LED will turn GREEN when EPC solenoid activates and

turn OFF when deactivated. LED will turn RED if anACTIVATED solenoid/harness is shorted to battery positive. LEDwill remain OFF if an ACTIVATED solenoid/harness is shorted toground or no continuity (open circuit).Carry out Dynamic Testing — Engine ON, EPC Solenoid YesFunctional Test. Refer to the transmission tester manual. INSTALL a new PCM. INSPECT the PCM• Observe the line pressure on the gauge while pressing EPC power relay. REPAIR as required.switch (engine must be running).

• Does the EPC (GREEN LED) activate when EPC switch is Nopressed and line pressure drops? GO to E6.

E6 CHECK THE RESISTANCE OF THE SOLENOID/HARNESSNOTE: Refer to the transmission tester for terminal locations.

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeE6 CHECK THE RESISTANCE OF THE SOLENOID/HARNESS

(Continued)

• Set the Bench/Drive switch to BENCH mode.• Rotate the Gear Select switch to the OHMS CHECK position.• Connect the ohmmeter negative lead to the VPWR jack and the

positive lead to the EPC jack on the tester.

• Record the resistance.Yes• NOTE: Out of specification may be caused by the internalGO to E7.harness or EPC solenoid concerns.

The resistance should be between 3.23 and 5.5 ohms. No• Is the resistance between 3.23 and 5.5 ohms? GO to E8.

E7 CHECK THE SOLENOID/HARNESS FOR A SHORT TO GROUND• Check for continuity between the BAT(-) jack (engine ground)

and the appropriate jack with an ohmmeter or other low currenttester (less than 200 milliamps).


EPC EPCVPWR

YesGO to E8.No

• Connection should show infinite resistance (no continuity). GO to Diagnosis By Symptom in this• Does the connection show continuity? section.

E8 INTERNAL ELECTRONIC DIAGNOSTICS• Remove the transaxle side pan.• Check that the internal harness connector is fully engaged on

the EPC solenoid assembly. Yes• Check that the internal harness connector terminals are fully GO to E9.seated in the connector.• Inspect the connector for damage. No• Are the above in good condition and engaged correctly? REPAIR as required.

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeE9 CHECK THE INTERNAL HARNESS (CONTINUITY)

• CAUTION: Do not probe into the connector terminals.This will damage the connector and could result in atransaxle concern.Disconnect the EPC solenoid.

• Connect the positive lead from an ohmmeter to the tester EPCjack and the negative lead at the blue wire at the EPC wireconnector.


• Connect the positive lead from an ohmmeter to the tester VPWRjack and the negative lead at the green wire at the EPC wireconnector.

YesGO to E10.


• Is the resistance for each solenoid less than 0.5 ohms? E11.E10 CHECK THE INTERNAL HARNESS (SHORT TO GROUND)

• Check for continuity between BAT(-) jack (engine ground) andthe appropriate wire with an ohmmeter or other low currenttester (less than 200 milliamps).

Solenoid Wire

EPC Blue (Signal)Green (EPC VPWR)

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeE10 CHECK THE INTERNAL HARNESS (SHORT TO GROUND)

(Continued)

YesINSTALL a new internal harness. GO toE11.

• Connection should show infinite resistance (no continuity). No• Does the connection show continuity? GO to E11.

E11 CHECK THE SOLENOID RESISTANCE• Check the solenoid resistance by connecting an ohmmeter at

the EPC solenoid terminals of the solenoid.

Yes• Record the resistance. The resistance should be between 3.23 GO to E12.and 5.5 ohms.• Is the resistance for each solenoid between 3.23 and 5.5 No

ohms? INSTALL a new EPC solenoid.E12 CHECK THE SOLENOID FOR A SHORT TO GROUND

• Check for continuity between BAT(-) jack (engine ground) andthe appropriate terminal with an ohmmeter or other low currenttester (less than 200 milliamps).

Solenoid Terminal

EPC +/-

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeE12 CHECK THE SOLENOID FOR A SHORT TO GROUND

(Continued)

YesINSTALL a new EPC solenoid.No

• Connection should show infinite resistance (no continuity). GO to Diagnosis By Symptom in this• Does the connection show continuity? section.

PINPOINT TEST F: TURBINE SHAFT SPEED (TSS) SENSOR

NOTE: Refer to the Turbine Shaft Speed Sensor Harness Connector illustration preceding thesepinpoint tests.

Test Step Result / Action to TakeF1 ELECTRONIC DIAGNOSTICS

• Check that the turbine shaft speed (TSS) sensor connector is Yesfully seated, terminals are engaged in connector and in good GO to F2.condition before proceeding. No• Have the items above been checked? CARRY OUT the checks. ERASE the

codes. RERUN the OBD Tests.F2 CHECK THE CONTINUITY OF THE TSS HARNESS CIRCUITS

• Key in OFF position.• Disconnect: TSS.

CAUTION: Do not pry on the connector. This willdamage the connector and could result in a transaxleconcern. Depress the tab on the TSS connector.Disconnect the TSS.

• Disconnect: PCM.Inspect for damaged or pushed out pins, corrosion or loosewires.

• Install the EEC-V Control System Breakout Box.• Measure the resistance between PCM signal test pin 6 at the

EEC-V Control System Breakout Box and pin 1 +TSS signalcircuit at the TSS harness connector.

(Continued)

2006 Taurus, 6/2005


DIAGNOSIS AND TESTING (Continued)PINPOINT TEST F: TURBINE SHAFT SPEED (TSS) SENSOR (Continued)

Test Step Result / Action to TakeF2 CHECK THE CONTINUITY OF THE TSS HARNESS CIRCUITS

(Continued)

• Measure the resistance between PCM signal test pin 91 at theEEC-V Control System Breakout Box and pin 2 -TSS signalcircuit at the TSS harness connector.

YesGO to F3.NoREPAIR the open circuit(s). REMOVE theEEC-V Control System Breakout Box.RECONNECT all of the components.ERASE the codes. RERUN the OBD

• Is each resistance less than 5 ohms? Tests.F3 CHECK THE TSS CIRCUITS FOR A SHORT TO POWER AND

GROUND• Key in OFF position.• Disconnect: PCM.• Disconnect: TSS.• Install the EEC-V Control System Breakout Box.• Measure the resistance between PCM test pin 6 and test pin 71

at the EEC-V Control System Breakout Box.

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeF3 CHECK THE TSS CIRCUITS FOR A SHORT TO POWER AND

GROUND (Continued)

• Measure the resistance between PCM test pins 6 and test pins24, 25, 51, 76, 77, 91 and 103 at the EEC-V Control SystemBreakout Box and chassis ground.

YesGO to F4.NoREPAIR the short circuit(s). REMOVE theEEC-V Control System Breakout Box.CONNECT all of the components. ERASE

• Is each resistance greater than 10,000 ohms? the codes and RERUN the OBD Tests.F4 TRANSMISSION FUNCTIONAL TEST

• Connect: TSS Sensor.• Install the EEC-V Control System Breakout Box.• Measure the voltage between pin 6 +TSS and pin 91 -TSS at

the EEC-V Control System Breakout Box. Set the voltmeter tothe AC scale.

YesINSTALL a new PCM.• Monitor the voltmeter while driving the vehicle.

• Does the voltage increase with an increase in vehicle Nospeed? GO to F5.

F5 CHECK THE RESISTANCE OF THE TSS SENSOR• Install the EEC-V Control System Breakout Box.

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeF5 CHECK THE RESISTANCE OF THE TSS SENSOR (Continued)

• Measure the resistance between pin 6 +TSS and pin 91 -TSS atthe EEC-V Control System Breakout Box.

• Record the resistance. The resistance is temperature dependent.Refer to the following chart.

TSS Temperature Resistance

Sensor Temperature Ohms Reading

-40°C (-40°F) 223-287 Ohms

20°C (68°F) 310-390 Ohms YesGO to F6.150°C (302°F) 442-566 OhmsNo

• Is the resistance within specification according to the INSTALL a new TSS sensor. RERUN thechart? TSS Function Test.

F6 CHECK THE SENSOR FOR A SHORT TO GROUND• Disconnect: TSS.• Measure the resistance between +TSS and ground and -TSS

and ground. (less than 200 milliamps).

YesINSTALL a new TSS sensor. REFER toTurbine Shaft Speed (TSS) Sensor in thissection.

• Connection should show infinite resistance (no continuity). No• Does the connection show continuity? GO to F7.

F7 CHECK THE TSS MAGNETISM• Remove the TSS sensor. Refer to Turbine Shaft Speed (TSS) YesSensor in this section. GO to F8.• Place the TSS sensor against a metal surface to which a

magnet would stick. The TSS sensor should be magnetized and Nostick to the metal surface. INSTALL a new TSS sensor. RERUN the

• Does the TSS sensor stick? TSS Function Test.

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeF8 CHECK THE DRIVEN SPROCKET AND EXCITER WHEEL

• Remove the TSS sensor. Refer to Turbine Shaft Speed (TSS)Sensor in this section.

• Select NEUTRAL.• Rotate the engine and observe through the TSS sensor hole in

the chain cover that all 4 tabs in the exciter wheel are presentand free of foreign material.

YesINSTALL a new TSS sensor. RERUN the• Measure the depth of the exciter wheel tooth from the outer TSS Function Test.edge of the chain cover. The distance should be within

specification: 18.65-16.92 mm (0.73-0.67 inch). Mark the tooth Nowith a marker and repeat the measurements for the other teeth. REFER to Transaxle and Transaxle in this

• Are the tabs present and free of foreign material and is section to repair the output shaft ring gear.depth within specification? REPAIR or INSTALL new as required.

PINPOINT TEST G: OUTPUT SHAFT SPEED (OSS) SENSOR

NOTE: Refer to the Output Shaft Speed Sensor Harness Connector Illustration preceding thesepinpoint tests.

Test Step Result / Action to TakeG1 ELECTRONIC DIAGNOSTICS

• Check that the output shaft speed (OSS) sensor connectors are Yesfully seated, pins are engaged in connector and in good GO to G2.condition before proceeding. No• Are the connectors OK? REPAIR as necessary. CLEAR the DTCs.

RERUN the OBD Tests.G2 CHECK THE CONTINUITY OF THE OSS HARNESS CIRCUITS

• Key in OFF position.

• CAUTION: Do not pry on the connector. This willdamage the connector and could result in a transaxleconcern. Press the button and pull up on the connector.Disconnect the OSS.

• Disconnect: PCM.• Install the EEC-V Control System Breakout Box and leave the

PCM disconnected.

(Continued)

2006 Taurus, 6/2005


DIAGNOSIS AND TESTING (Continued)PINPOINT TEST G: OUTPUT SHAFT SPEED (OSS) SENSOR (Continued)

Test Step Result / Action to TakeG2 CHECK THE CONTINUITY OF THE OSS HARNESS CIRCUITS

(Continued)

• Measure the resistance between PCM signal test pin 84 atEEC-V Control System Breakout Box and the +OSS signalcircuit at the OSS harness connector.

• Measure the resistance between PCM signal test pin 91 atEEC-V Control System Breakout Box and the -OSS signal circuitat the OSS harness connector.

YesGO to G3.NoREPAIR the circuit(s) as necessary.CLEAR the DTCs. RERUN the OBD

• Are all resistances less than 5 ohms? Tests.G3 CHECK THE OSS CIRCUITS FOR A SHORT TO POWER AND

GROUND• Install the EEC-V Control System Breakout Box.• Measure the resistance between the PCM test pin 84 and test

pin 71 at the EEC-V Control System Breakout Box.

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeG3 CHECK THE OSS CIRCUITS FOR A SHORT TO POWER AND

GROUND (Continued)

• Measure the resistance between PCM test pin 84, and test pins24, 25, 51, 76, 77, 91 and 103 at the EEC-V 104-Pin BreakoutBox and chassis ground.

YesGO to G4.NoREPAIR the circuit(s) as necessary.CLEAR the DTCs. RERUN the OBD

• Is each resistance greater than 10,000 ohms? Tests.G4 TRANSMISSION FUNCTIONAL TEST

• Connect: PCM.• Using the OSS adapter connector, connect the transmission

tester to the OSS sensor.• With the voltmeter set to AC, measure the voltage with the

positive lead to +TSS/OSS and the negative lead to -TSS/OSS.

Yes• Carry out the OSS Voltage Test under Dynamic Testing Engine INSTALL a new PCM. REFER to SectionON, refer to the transmission tester manual. Monitor the 303-14. RERUN the OBD Tests.voltmeter.• Does the voltage increase with an increase in vehicle No

speed? GO to G5.G5 CHECK THE RESISTANCE OF THE OSS SENSOR

NOTE: Refer to the transmission tester for pin locations.

(Continued)

2006 Taurus, 6/2005



Test Step Result / Action to TakeG5 CHECK THE RESISTANCE OF THE OSS SENSOR (Continued)

• Measure the resistance with the negative lead to -TSS/OSS jackand the positive lead to +TSS/OSS jack on the tester.

YesGO to G6.NoINSTALL a new OSS sensor. REPEAT the

• Is the resistance between 235 and 735 ohms? OSS Function Test.G6 CHECK THE SENSOR FOR A SHORT TO GROUND

• NOTE: Connection should show infinite resistance (nocontinuity).Check for continuity between the BAT(-) jack (engine ground)and the TSS/OSS jacks as shown.


OSS +TSS/OSS-TSS/OSS

YesINSTALL a new OSS sensor. REPEAT theOSS Function Test.No

• Does the connection show continuity? GO to G7.G7 CHECK THE OSS MAGNETISM

• Remove the OSS sensor. Yes• Place the OSS sensor against a metal surface to which a CLEAR the DTCs. REPEAT the OSS

magnet would stick. The OSS sensor should be magnetized and Function Test.stick to the metal surface. No• Does the OSS sensor stick? INSTALL a new OSS sensor. REPEAT the

OSS Function Test.

2006 Taurus, 6/2005


DIAGNOSIS AND TESTING (Continued)PINPOINT TEST H: SOLENOID MECHANICAL FAILURE

NOTE: Repair all other DTCs before repairing the following DTCs: P1714, P1715, P1716 andP1740.

Test Step Result / Action to TakeH1 ELECTRONIC DIAGNOSIS

• Connect the diagnostic tool. Yes• Carry out the KOEO Test until continuous DTCs have been REPAIR the DTCs for TFT or shift

displayed. solenoids first. CLEAR DTCs and CARRY• If any of the following DTCs are present, continue with this test: OUT Transmission Drive Cycle Test.

P1714, P1715, P1716 and P1740. RERUN Quick Tests.• Are other DTCs present for TFT, TCC solenoid or shift Nosolenoids? INSTALL a new solenoid and/or body.

REFER to Diagnostic Trouble Code (DTC)Charts for code description. GO to H2.

H2 TRANSMISSION DRIVE CYCLE TEST• Carry out the Transaxle Drive Cycle Test. Refer to Transaxle Yes

Drive Cycle Test in this section. GO to H3.• Carry out the On-Board Diagnostic Test. No• Does the transaxle upshift and downshift, and torque REFER to Diagnosis By Symptom toconverter clutch operate correctly? diagnose shift concerns.

H3 RETRIEVE DTCS• Connect the diagnostic tool. Yes• Carry out the KOEO Test until continuous DTCs have been INSTALL a new PCM. ROAD TEST and

displayed. Refer to the diagnostic tool tester manual. RERUN the Quick Tests.• Are DTCs P1714, P1715, P1716, P1740 still present? No

Testing completed. If a concern still exists,REFER to Diagnosis By Symptom in thissection.

2006 Taurus, 6/2005

Documents

Pinpoint Tests — Non OSC Equipped Vehicleww2.justanswer.com/uploads/HE/heavychevy396/2012-11-16...2012/11/16 · 307-01-6 Automatic Transaxle/Transmission — 4F50N 307-01-6 DIAGNOSIS