PV77620184635MID128FaultcodeGuide2007EmissionsVNVHD2VT

DService ManualTrucks

Group 28MID 128 Fault Code Guide

2007 EmissionsVN, VHD VERSION2, VT

PV776-20184635

DForeword

The descriptions and service procedures contained in this manual are based on designsand methods studies carried out up to October 2008.

The products are under continuous development. Vehicles and components producedafter the above date may therefore have different specifications and repair methods.When this is believed to have a significant bearing on this manual, supplementaryservice bulletins will be issued to cover the changes.

The new edition of this manual will update the changes.

In service procedures where the title incorporates an operation number, this is areference to an V.S.T. (Volvo Standard Times).

Service procedures which do not include an operation number in the title are for generalinformation and no reference is made to an V.S.T.

Each section of this manual contains specific safety information and warnings whichmust be reviewed before performing any procedure. If a printed copy of a procedure ismade, be sure to also make a printed copy of the safety information and warnings thatrelate to that procedure. The following levels of observations, cautions and warningsare used in this Service Documentation:

Note: Indicates a procedure, practice, or condition that must be followed in order to havethe vehicle or component function in the manner intended.

Caution: Indicates an unsafe practice where damage to the product could occur.

Warning: Indicates an unsafe practice where personal injury or severe damage to theproduct could occur.

Danger: Indicates an unsafe practice where serious personal injury or death could occur.

Volvo Truck North America a division of Volvo Group NorthAmerica, Inc.

Greensboro, NC USA

Order number: PV776-20184635Repl: This Service Manual replaces Manual 28 "Fault Code Guide 2007 Emissions" (7.2007) Publication no.

PV776–20113992.

© 2008 Volvo Truck North America a division of Volvo Group North America, Inc., Greensboro, NC USA

All rights reserved. No part of this publication may be reproduced, stored inretrieval system, or transmitted in any forms by any means, electronic,mechanical, photocopying, recording or otherwise, without the prior writtenpermission of Volvo Truck North America a division of Volvo Group NorthAmerica, Inc.

USA32772.ihval

DContentsGROUP 28 ............................................................................................ 3

Design and Function ........................................................................... 3Engine Control System ........................................................................ 3

Troubleshooting ................................................................................... 11Engine ECU, Fault Tracing ................................................................... 11MID 128 PID 26 Fan Speed Percent .................................................... 14MID 128 PID 45 Preheater Relay ........................................................ 14MID 128 PID 81 Particulate Filter ........................................................ 15MID 128 PID 84 Vehicle Speed ........................................................... 15MID 128 PID 85 Cruise Control Status ................................................ 15MID 128 PID 91 Accelerator Pedal Position ........................................ 16MID 128 PID 94 Fuel Delivery Pressure .............................................. 16MID 128 PID 97 Water in Fuel Indicator .............................................. 17MID 128 PID 98 Engine Oil Level ........................................................ 17MID 128 PID 100 Engine Oil Pressure ................................................ 18MID 128 PID 102 Intake Manifold Pressure ......................................... 19MID 128 PID 103 Turbo Speed ............................................................ 20MID 128 PID 105 Intake Manifold Temperature ................................... 21MID 128 PID 108 Atmospheric Pressure ............................................. 22MID 128 PID 110 Coolant Temperature ............................................... 23MID 128 PID 111 Coolant Level .......................................................... 24MID 128 PID 153 Crankcase Pressure ................................................ 25MID 128 PID 171 Ambient Temperature .............................................. 26MID 128 PID 173 Exhaust Temperature .............................................. 26MID 128 PID 175 Engine Oil Temperature .......................................... 27MID 128 PID 354 Relative Humidity .................................................... 28MID 128 PID 411 EGR Exhaust Back Pressure .................................. 29MID 128 PID 412 EGR Temperature ................................................... 30MID 128 PPID 35 EGR Mass Flow ...................................................... 31MID 128 PPID 89 Variable Geometry Turbocharger Smart RemoteActuator Temperature .......................................................................... 31MID 128 PPID 122 Engine Compression Brake .................................. 32MID 128 PPID 270 NOx Sensor .......................................................... 33MID 128 PPID 272 Air Pressure Compensation .................................. 34MID 128 PPID 326 Soot Level ............................................................. 34MID 128 PPID 328 Aftertreatment Injection Shutoff Valve .................. 35MID 128 PPID 329 Aftertreatment Fuel Injector .................................. 35MID 128 PPID 330 DRV ...................................................................... 36MID 128 PPID 337 Ash Level .............................................................. 37MID 128 PPID 387 Temperature Sensor, Catalytic Converter ............. 37MID 128 PPID 436 Exhaust Gas Temperature Sensor 3 ..................... 38MID 128 PPID 437 Aftertreatment Injector Fuel Pressure Sensor ...... 39MID 128 PSID 47 Particulate Trap Regeneration ................................ 40MID 128 PSID 98 Boost Air System .................................................... 40MID 128 PSID 108 Aftertreatment Injection System ........................... 41MID 128 PSID 109 Engine Coolant Temperature Sensor .................... 42MID 128 SID 1/2/3/4/5/6 Unit Injector .................................................. 43MID 128 SID 18 Drain Valve, Water Separator .................................... 44MID 128 SID 21 Engine Position Timing Sensor ................................. 45MID 128 SID 22 Engine Speed Sensor ............................................... 46MID 128 SID 27 Variable Geometry Turbocharger .............................. 47MID 128 SID 33 Fan Control ................................................................ 48

1

DMID 128 SID 70 Preheater Element 1 ................................................. 48MID 128 SID 71 Preheater Element 2 ................................................. 49MID 128 SID 146 EGR Valve 1 ............................................................ 49MID 128 SID 211 5 Volt DC Supply ..................................................... 50MID 128 SID 230 Idle Validation Switch 1 ........................................... 50MID 128 SID 232 5 Volt DC Supply to Sensor ..................................... 51

2

DGroup 28 Design and Function

Group 28Design and Function

Engine Control SystemThe “Premium Tech Tool” (PTT) is the preferredtool for performing diagnostic work. Contactyour local dealer for more information or visit“www.premiumtechtool.com”.

System OverviewFive electronic control modules are used; the EngineManagement System (EMS) Module, Instrument ClusterModule (ICM), Vehicle Electronic Control Unit (VECU),Transmission Electronic Control Unit (TECU) andthe Gear Selector Electronic Control Unit (GSECU).Together, these modules operate and communicatethrough the J1939 high speed serial data line to controla variety of engine and vehicle cab functions. TheEngine Management System (EMS) Module controlsfuel timing and delivery, fan operation, engine protectionfunctions, engine brake operation, the EGR valve, and theturbocharger nozzle. The Vehicle Electronic Control Unit(VECU) controls cruise control functions, accessory relaycontrols and idle shutdown functions. The InstrumentCluster Module (ICM) primarily displays operationalparameters and communicates these to the other ECU’s.All have the capability to communicate over the J1587normal speed data lines primarily for programming,diagnostics and data reporting.

In addition to their control functions, the moduleshave on-board diagnostic capabilities. The on-boarddiagnostics are designed to detect faults or abnormalconditions that are not within normal operatingparameters. When the system detects a fault or abnormalcondition, the fault will be logged in one or both of themodules’ memory, the vehicle operator will be advisedthat a fault has occurred by illumination a malfunctionindicator lamp and a message in the driver informationdisplay, if equipped. The module may initiate the engineshutdown procedure if the system determines that thefault could damage the engine.

In some situations when a fault is detected, the systemwill enter the "limp home" mode. The limp home modeallows continued vehicle operation but the system maysubstitute a sensor or signal value that may result inpoor performance. In some instances, the system willcontinue to function but engine power may be limited toprotect the engine and vehicle. Fault codes logged in thesystem memory can later be read, to aid in diagnosingthe faults, with a diagnostic computer or through theinstrument cluster display, if equipped. When diagnosing

an intermittent code or condition, it may be necessaryto use a diagnostic computer connected to the SerialCommunication Port.

Additional data and diagnostic tests are availablewhen a diagnostic computer is connected to the SerialCommunication Port.

For diagnostic software, contact your local dealer.

The Vehicle Electronic Control Unit (VECU) is mountedon a panel below the top dash access panel in the centerof the dash on conventional models. The VECU is amicroprocessor based controller programmed to performseveral functions, these include:

• Driver controls• Vehicle and engine speed controls• Starter control• Cab power• Idle controls• Broadcasting data on the serial data lines• Trip data logging• Diagnostic fault logging and password processing

The VECU performs these functions by monitoring thesignals from sensors and switches, and data receivedover the serial data lines from the other ECU’s. TheVECU directly monitors the Throttle Position (TP) Sensorand Vehicle Speed Sensor (VSS).

The VECU also monitors the position or state of a numberof switches to perform its control and diagnostic functions.They are:

• A/C Pressure Switch• Air Suspension Height Control Switch• Differential Lock Switch• Engine Brake Switches• Ignition Key Switch• PTO Switches (if equipped)• Service and Park Brake Switches• Speed Control Switches (Set/Decel, Resume/Accel)• 5th Wheel Slide Switch

3


The EMS is a microprocessor based controllerprogrammed to perform fuel injection quantity and timingcontrol, diagnostic fault logging, and to broadcast data toother modules. The fuel quantity and injection timing toeach cylinder is precisely controlled to obtain optimal fueleconomy and reduced exhaust emissions in all drivingsituations.

The EMS controls the operation of the Electronic UnitInjectors (EUIs), engine brake solenoid, EGR valve,turbocharger nozzle position, and cooling fan clutchbased on input information it receives over the serial datalines and from the following sensors:

• Ambient Air Temperature Sensor• Ambient Pressure sensor• Boost Air Pressure (BAP) Sensor• Camshaft Position (Engine Position) Sensor• Cooling Fan Speed (CFS) Sensor• Crankshaft Position (Engine Speed) Sensor• Differential Pressure DPF Sensor• EGR Differential Pressure Sensor• EGR Temperature Sensor

• Engine Coolant Level (ECL) Sensor• Engine Coolant Temperature (ECT) Sensor• Engine Oil Pressure (EOP) Sensor• Engine Oil Level (EOL) Sensor• Engine Oil Temperature (EOT) Sensor• Exhaust Temperature Sensor (DPF Sensors)• Fuel Pressure Sensor• Intake Air Temperature And Humidity (IATH) Sensor• Intake Manifold (Boost) Temperature Sensor• Throttle Position (TP) Sensor• Turbo Speed Sensor• Variable Geometry Turbocharger (VGT) Position

Sensor

The Vehicle Electronic Control Unit (VECU) and EngineManagement System (EMS) Module are dependent oneach other to perform their specific control functions. Inaddition to switch and sensor data the broadcast of databetween modules also includes various calculations andconclusions each module has developed, based on theinput information it has received.

4


SensorsAmbient Air Temperature SensorThe Ambient Air Temperature Sensor is used to detect theoutside air temperature. The sensor modifies a voltagesignal from the ECM. The modified signal returns to theECM as the ambient air temperature. The sensor uses athermistor that is sensitive to the change in temperature.The electrical resistance of the thermistor decreases astemperature increases.

The Ambient Air Temperature Sensor is located in thefront of the vehicle.

Ambient (Atmospheric) Pressure SensorThe Ambient (Atmospheric) Pressure Sensor contains apressure sensitive diaphragm and an electrical amplifier.Mechanical pressure applied to the diaphragm causesthe diaphragm to deflect and the amplifier to produce anelectrical signal proportional to the deflection.

The Ambient (Atmospheric) Pressure Sensor is built intothe Engine Management System (EMS) Module.

Camshaft Position SensorThe Camshaft Position (Engine Position) Sensor islocated in the rear face of the timing gear cover at therear of the engine, near the bottom of the valve cover. Ituses magnetic induction to generate a pulsed electricalsignal. It senses the passage of seven (7) timing bumpson the edge of the camshaft dampener. Six of the holescorrespond to the phasing of the electronic unit injectors,while the seventh hole indicates the top dead centerposition.

Cooling Fan Speed (CFS) SensorOn engines with an electronically controlled viscous fandrive, the electronic fan drive contains a Hall effect speedsensor. When the engine is running, a series of vanes inthe fan drive housing rotates past a magnet in the fandrive solenoid generating a pulsed voltage signal. TheEngine Management System (EMS) Module monitorsthe status if the air conditioning system and signals fromthe Engine Coolant Temperature (ECT) Sensor, theEngine Oil Temperature (EOT) Sensor, and the EngineSpeed/Timing (RPM/TDC) Sensor and calculates theoptimal cooling fan speed.

The Cooling Fan Speed Sensor is located in the fan driveon the front of the engine.

5


Crankshaft Position (Engine Speed) SensorThe Crankshaft Position (Engine Speed) Sensor usesmagnetic induction to generate a pulsed electrical signal.Notches are machined into the edge of the flywheel.When one of the notches passes close to the sensor,electric pulses result.

The Crankshaft Position (Engine Speed) Sensor alsoindicates when the crankshaft is at the top dead centerposition.

Differential Pressure DP SensorThe differential pressure sensor is used for flowmeasurement of the Diesel Particulate Filter (DPF). Thissensor has two pressure ports and senses the differencein pressure between the two ports. Measurement of thepressure before and after the DPF is used to calculatediesel filter regeneration.

The Differential Pressure DPF Sensor is located on theside of the Diesel Particulate Filter (DPF).

EGR Differential Pressure SensorThe EGR differential pressure sensor is used for flowmeasurement of the Exhaust Gas Recirculation (EGR)valve. This sensor has two pressure ports and sensesthe difference in pressure between the two ports.Measurement of the pressure before and after the EGRvalve is used to calculate EGR flow.

The EGR Differential Pressure Sensor is located on theleft or right side of the engine.

EGR Temperature SensorThe EGR temperature sensor detects exhaust gastemperature for EGR system. The sensor modifies avoltage signal from the control unit. The modified signalreturns to the control unit as the exhaust temperatureof the EGR system to confirm EGR operation. Thesensor uses a thermistor that is sensitive to the changein temperature.

The EGR Temperature Sensor is located near the EGRvalve.

Engine Coolant Level (ECL) SensorThe Engine Coolant Level (ECL) Sensor is a switch. Ifengine coolant level falls below a calibrated point thecontacts open and the driver will be notified of the lowcoolant level.

The Engine Coolant Level (ECL) Sensor is located in thecooling system reservoir tank.

6


Engine Coolant Temperature (ECT) SensorThe Engine Coolant Temperature Sensor is located atthe front of the engine. The sensor will indicate a highcoolant temperature caused by problems like radiatorblockage, thermostat failure, heavy load, or high ambienttemperatures. This sensor is also used for cold startenhancement and for fan clutch engagement.

Engine Oil Pressure (EOP) SensorThe Engine Oil Pressure Sensor contains a pressuresensitive diaphragm and a electrical amplifier. Mechanicalpressure applied to the diaphragm causes the diaphragmto deflect and the amplifier to produce an electrical signalproportional to the deflection.

The Engine Oil Pressure Sensor is located on the oil filterassembly. The sensor monitors engine oil pressure towarn of lubrication system failure.

Engine Oil Level (EOL) SensorThe Engine Oil Level Sensor is located in the oil pan.

Engine Oil Temperature (EOT) SensorThe Engine Oil Temperature Sensor is a thermistorwhose resistance varies inversely to temperature. Thesensor has a negative temperature coefficient, whichmeans the sensor resistance will decrease as the engineoil temperature increases.

The Engine Oil Temperature Sensor is located in the oilpan.

Exhaust Temperature Sensor (DPF Sensors)The exhaust gas temperature sensor detects exhaustgas temperature for DPF protection as well as DPFregeneration control. The sensor modifies a voltagesignal from the control unit. The modified signal returns tothe control unit as the exhaust temperature at that specificlocation of the exhaust. The sensor uses a thermistor thatis sensitive to the change in temperature.

The Exhaust Temperature Sensors are located in theDPF assembly.

Fuel Pressure SensorThe fuel pressure sensor contains a diaphragm thatsenses fuel pressure. A pressure change causes thediaphragm to flex, inducing a stress or strain in thediaphragm. The resistor values in the sensor change inproportion to the stress applied to the diaphragm andproduces an electrical output.

The Fuel Pressure Sensor is located on top of the fuelfilter housing.

7


Intake Air Temperature and Humidity (IATH) SensorThe Intake Air Temperature and Humidity (IATH)Sensor contains a thermistor and a capacitive sensor.The resistance of the thermistor varies inversely totemperature. The output of the capacitive sensorincreases as the humidity of the surrounding air increases.By monitoring the signals from both portions of thesensor, the Engine Management System (EMS) Modulecalculates the temperature and humidity of the air passingthrough the air filter housing.

The Intake Air Temperature and Humidity (IATH) Sensoris located in the air intake tube just downstream from theair filter canister.

Intake Manifold (Boost) Temperature SensorThe Intake Manifold (Boost) Temperature Sensor isa thermistor whose resistance varies inversely totemperature. The sensor has a negative temperaturecoefficient, which means the sensor resistance willdecrease as the inlet air temperature increases.

The Intake Manifold (Boost) Temperature Sensor islocated in the intake manifold.

Intake Manifold Pressure SensorThe Intake Manifold Pressure Sensor contains apressure sensitive diaphragm and an electrical amplifier.Mechanical pressure applied to the diaphragm causesthe diaphragm to deflect and the amplifier to produce anelectrical signal proportional to the deflection.

The Intake Manifold Pressure Sensor is located on the airinlet pipe before the intake manifold.

Throttle Position (TP) SensorThe Throttle Position Sensor is a potentiometer thatis mechanically linked to the accelerator pedal. Apotentiometer is a variable resistor whose resistancewill change as the pedal is pressed. As the resistancechanges, the signal voltage of the sensor changesindicating the accelerator pedal position.

The Throttle Position Sensor is located above theaccelerator pedal. The sensor is designed to improve thedriver’s control by reducing sensitivity to chassis motion.This sensor provides the driver’s fuel request input to theVECU.

Turbo Speed SensorThe Turbo Speed Sensor informs the EMS of the turboshaft speed. The sensor does not read from the vanes,but reads from the shaft. The Engine ManagementSystem (EMS) Module uses this signal in conjunction withthe VGT position sensor signal to control the speed of theturbocharger and therefore optimize the intake manifoldpressure.

The Turbo Speed Sensor is mounted in the center of theturbocharger.

8


Variable Geometry Turbocharger Smart Remote Actuator (VGT SRA)The Variable Geometry Turbocharger Smart RemoteActuator (VGT SRA) takes the position commands fromthe EMS, moves the nozzle of the turbocharger to thedesired position, and performs all of the diagnostics andself checks on the actuator.

9

D

10

DGroup 28 Troubleshooting

Troubleshooting

Engine ECU, Fault TracingThe “Premium Tech Tool” (PTT) is the preferredtool for performing diagnostic work. Contactyour local dealer for more information or visit“www.premiumtechtool.com”.

The control units on the information link communicateaccording to the SAE J1587 standard. The standardhas been extended with Volvo’s own supplement(PPID, PSID). The fault codes set by the control unitscontain information that is described by the followingabbreviations.

MID Message Identification Description:Identification of a control unit.

PID Parameter Identification Description:Identification of a parameter (value).

PPID Proprietary Parameter IdentificationDescription Volvo:Unique identification of a parameter(value).

SID Subsystem Identification Description:Identification of a component.

PSID Proprietary Subsystem IdentificationDescription Volvo:Unique identification of a component.

FMI Failure Mode Identifier:Identification of fault types.

FMI Table

FMI Display Text SAE Text

0 Value to high Data valid, but above the normal working range

1 Value too low Data valid, but below the normal working range

2 Incorrect data Intermittent or incorrect data

3 Electrical fault Abnormally high voltage or short circuit to higher voltage

4 Electrical fault Abnormally low voltage or short circuit to lower voltage

5 Electrical fault Abnormally low current or open circuit

6 Electrical fault Abnormally high current or short circuit to ground

7 Mechanical fault Incorrect response from a mechanical system

8 Mechanical or electrical fault Abnormal frequency

9 Communication fault Abnormal update rate

10 Mechanical or electrical fault Abnormally strong vibrations

11 Unknown fault Non-identifiable fault

12 Component fault Faulty unit or component

13 Incorrect calibration Calibration values outside limits

14 Unknown fault Special instructions

15 Unknown fault Reserved for future use

11


Engine ECU, Fault TracingPID“MID 128 PID 26 Fan Speed Percent” page 14

“MID 128 PID 45 Preheater Relay” page 14

“MID 128 PID 81 Particulate Filter” page 15

“MID 128 PID 84 Vehicle Speed” page 15

“MID 128 PID 85 Cruise Control Status” page 15

“MID 128 PID 91 Accelerator Pedal Position” page 16

“MID 128 PID 94 Fuel Delivery Pressure” page 16

“MID 128 PID 97 Water in Fuel Indicator” page 17

“MID 128 PID 98 Engine Oil Level” page 17

“MID 128 PID 100 Engine Oil Pressure” page 18

“MID 128 PID 102 Intake Manifold Pressure” page 19

“MID 128 PID 103 Turbo Speed” page 20

“MID 128 PID 105 Intake Manifold Temperature” page 21

“MID 128 PID 108 Atmospheric Pressure” page 22

“MID 128 PID 110 Coolant Temperature” page 23

“MID 128 PID 111 Coolant Level” page 24

“MID 128 PID 153 Crankcase Pressure” page 25

“MID 128 PID 171 Ambient Temperature” page 26

“MID 128 PID 173 Exhaust Temperature” page 26

“MID 128 PID 175 Engine Oil Temperature” page 27

“MID 128 PID 354 Relative Humidity” page 28

“MID 128 PID 411 EGR Exhaust Back Pressure” page 29

“MID 128 PID 412 EGR Temperature” page 30

PPID“MID 128 PPID 35 EGR Mass Flow” page 31

“MID 128 PPID 89 Variable Geometry Turbocharger Smart Remote Actuator Temperature” page 31

“MID 128 PPID 122 Engine Compression Brake” page 32

“MID 128 PPID 270 NOx Sensor” page 33

“MID 128 PPID 326 Soot Level” page 34

“MID 128 PPID 272 Air Pressure Compensation” page 34

“MID 128 PPID 328 Aftertreatment Injection Shutoff Valve” page 35

“MID 128 PPID 329 Aftertreatment Fuel Injector” page 35

“MID 128 PPID 330 DRV” page 36

“MID 128 PPID 337 Ash Level” page 37

“MID 128 PPID 387 Temperature Sensor, Catalytic Converter” page 37

“MID 128 PPID 436 Exhaust Gas Temperature Sensor 3” page 38

“MID 128 PPID 437 Aftertreatment Injector Fuel Pressure Sensor” page 39

12


PSID“MID 128 PSID 47 Particulate Trap Regeneration” page 40

“MID 128 PSID 98 Boost Air System” page 40

“MID 128 PSID 108 Aftertreatment Injection System” page 41

“MID 128 PSID 109 Engine Coolant Temperature Sensor” page 42

SID“MID 128 SID 1/2/3/4/5/6 Unit Injector” page 43

“MID 128 SID 18 Drain Valve, Water Separator” page 44

“MID 128 SID 21 Engine Position Timing Sensor” page 45

“MID 128 SID 22 Engine Speed Sensor” page 46

“MID 128 SID 27 Variable Geometry Turbocharger” page 47

“MID 128 SID 33 Fan Control” page 48

“MID 128 SID 70 Preheater Element 1” page 48

“MID 128 SID 71 Preheater Element 2” page 49

“MID 128 SID 146 EGR Valve 1” page 49

“MID 128 SID 211 5 Volt DC Supply” page 50

“MID 128 SID 230 Idle Validation Switch 1” page 50

“MID 128 SID 232 5 Volt DC Supply to Sensor” page 51

13


MID 128 PID 26 Fan Speed PercentType offault:

FMI Description: Fault Condition: PossibleSymptoms:

Possible Cause:

FMI 3• Voltage above

normal or shortedto high

• Missing signalfrom Fan SpeedSensor

• Short Circuit +,Measuring line

• Short Circuit -,Measuring line

• Open Circuit,Measuring line

• Open Circuit,Ground line

• Higher fuelconsumption

• Will work ason/off fan,100%fan speedif cooling isneeded

• Cooling Fan Speed (CFS) sensorfailure

• Faulty Cooling Fan Speed (CFS)sensor harness

MID 128 PID 45 Preheater RelayType offault:


Possible Cause:


normal or shortedto high


• Preheat relay notactivated

• White smoke forcold start

• Start problems incold climate

• Preheat relay solenoid shorted

FMI 4• Voltage below

normal or shortedlow


• Induction air ishot

• Preheat relayis impossible toturn off

• Faulty harness

FMI 5• Current below

normal or opencircuit

• Open Circuit • Preheat relay notactivated

• White smoke forcold start

• Start problems incold climate

• Faulty Preheat relay• Faulty harness

14


MID 128 PID 81 Particulate FilterType offault:


Possible Cause:

FMI 0• Data valid but

above normaloperationalrange-most severelevel

• Moderately highpressure

• Engine derate• Malfunction

indicator lampilluminated

• Particulate Trap Pressure (PTP)Sensor failure

FMI 2• Data erratic,

intermittent orincorrect

• Sensor is notrational

• Malfunctionindicator lampilluminated



normal or shortedhigh

• Short to batteryon the meteringside

• Open in theground line



• Faulty Particulate Trap Pressure(PTP) Sensor connector

• Faulty harness


normal or open• Open in 5 volt

supply line• Short to ground

in metering line• Open in metering

line



• Faulty harness

FMI 12• Bad intelligent

device orcomponent

• Particulate TrapPressure (PTP)Sensor signalhigh or low butstill within range

• Engine derate • Diesel Particulate Filter (DPF) isdamaged, filled with soot or missing

MID 128 PID 84 Vehicle SpeedType offault:


Possible Cause:

FMI 9• Abnormal update

rate• Missing signal

from VECU• Engine derate • J1708 vehicle speed message does

not exist, (VECU error)

MID 128 PID 85 Cruise Control StatusType offault:


Possible Cause:


rate• Missing (Cruise

Control) signalfrom VECU

• Cruise Controldoes not work

• No clutch info to EMS (J1939)

15


MID 128 PID 91 Accelerator Pedal PositionType offault:


Possible Cause:


rate• Missing signal

from VECU• N/A • J1708 pedal information not

available

MID 128 PID 94 Fuel Delivery PressureType offault:


Possible Cause:

FMI 1• Pressure critically

low• EMS module

detects a low fuelpressure reading

• Rough idle• Uneven running• Engine derate

• A clogged fuel filter• Fuel leaking from a fuel line or fitting• Poor fuel pump pressure• Low fuel level

FMI 3• Voltage high/open • Low Fuel

Pressure (FP)Sensor signalline voltage



• Damaged contacts in harness• Faulty Fuel Pressure (FP) sensor• Open circuit.

FMI 5• Current low/open • Low Fuel

Pressure (FP)Sensor signalline voltage



• Damaged contacts in harness• Faulty Fuel Pressure (FP) sensor

FMI 7• Current low/open • Drop in fuel

pressure• Engine derate• Malfunction


• Clogged fuel filter• Leaking fuel line or fitting• Poor fuel pump response

16


MID 128 PID 97 Water in Fuel IndicatorType offault:


Possible Cause:

FMI 3• Voltage high/open • N/A • Undetected

water in fuelsupply

• Uneven running• Malfunction


• Open circuit

FMI 4• Voltage low • N/A • Undetected

water in fuelsupply

• Uneven running• Malfunction


• Short to ground• Open circuit• Faulty sensor

MID 128 PID 98 Engine Oil LevelType offault:


Possible Cause:


below normaloperational range

• Moderatelybelow range

• Critically belowrange

• N/A • Low oil level Leakage• Critically low oil level Leakage



• Short Circuit -Positive side

• Oil level can notbe measured

• Engine Oil Level (EOL) sensorfailure

• Faulty harness



• Short Circuit +,Positive side

• Open Circuit +,Positive side

• Open Circuit-Negative side

• Oil level can notbe measured

• Engine Oil Level (EOL) sensorfailure

• Faulty harness

17


MID 128 PID 100 Engine Oil PressureType offault:


Possible Cause:




• Engine derate• Low pressure

• Oil leakage• Broken oil pump• Clogged oil system





• Oil pressureshows 0 in thecluster, engine isrunning

• Engine Oil Pressure (EOP) sensorfailure

• Faulty harness



• Open Circuit +,5V Supply line



• Oil pressureshows 0 in thecluster, engine isrunning

• Engine Oil Pressure (EOP) sensorfailure

• Faulty harness

18


MID 128 PID 102 Intake Manifold PressureType offault:


Possible Cause:


above normaloperational range

• Intake ManifoldPressure Sensoroutput is high

• Intake ManifoldPressure isindicating anunphysical value



• Variable Geometry Turbo (VGT)actuator stuck

• Faulty Intake Manifold PressureSensor harness

• Intake Manifold Pressure Sensorfailure



• Intake ManifoldPressure Sensoris indicating anunphysical value



• Intermittent fault in the IntakeManifold Pressure Sensor harness

• Faulty Boost Air Pressure connector• Intake Manifold Pressure Sensor

failure



• Intake ManifoldPressure Sensoroutput is too highor too low





failure


normal or shortedto high source

• A short to batteryin the meteringcircuit

• An open inthe groundcircuit of theIntake ManifoldPressure Sensor





failure



• A short to groundin the harness

• An open in the 5volt supply circuit

• An open in themetering circuit





failure

FMI 11• Root cause not

known (DataIncorrect)

• Intake ManifoldPressure Sensoroutput is too highor low



• Faulty Intake Manifold PressureSensor harness

• Inlet air leakage• Intake Manifold Pressure Sensor

failure

19


MID 128 PID 103 Turbo SpeedType offault:


Possible Cause:



• Turbochargerspeed is at least25% greater thanthe target wheelspeed for themeasured boost



• Miss detection• Faulty Turbo Speed Sensor harness• Faulty Turbo Speed Sensor

connector• Turbo Speed Sensor failure



• Turbochargerspeed is at least25% less thanthe target wheelspeed for themeasured boost



• Miss detection• Faulty Turbo Speed Sensor harness• Faulty Turbo Speed Sensor

connector• Turbo Speed Sensor failure


rate (missingsensor signal)

• A fault is logged ifthe Turbo SpeedSensor signal islost



• Communication fault in the meteringline of the Turbo Speed Sensorcircuit

• Short to ground in the metering lineof the Turbo Speed Sensor circuit

• An open in the metering line of theTurbo Speed Sensor circuit

20


MID 128 PID 105 Intake Manifold TemperatureType offault:


Possible Cause:



• The IntakeManifoldTemperatureSensor isindicating anunphysical value



• Faulty Intake Manifold TemperatureSensor or Engine ManagementSystem (EMS) Module connector

• Temperature Sensor harness• Malfunction Intake Manifold

Temperature Sensor



• The BoostTemperatureSensor isindicating anunphysical value

• Minor enginederate



• Break in the Intake ManifoldTemperature Sensor harness

• Malfunction Intake ManifoldTemperature Sensor



• The IntakeManifoldTemperatureSensor output istoo high or toolow




• Break in the Intake ManifoldTemperature Sensor harness

• Malfunction Intake ManifoldTemperature Sensor



• N/A • Difficult to startin cold climates



• Short circuit• Intermittent fault in the Intake

Manifold Temperature Sensorharness

• Faulty Intake Manifold TemperatureSensor connector

• Intake Manifold Temperature Sensorfailure



• A short to battery• An open in the 5

volt supply circuit

• Difficult to startin cold climates



• A short circuit in the metering circuit• Intermittent fault in the Intake

Manifold Temperature Sensorharness

• Faulty Intake Manifold TemperatureSensor connector


FMI 10• Abnormal rate of

change• The Boost

TemperatureSenor outputis showing aconstant value



• Faulty Intake Manifold TemperatureSensor harness


21


MID 128 PID 108 Atmospheric PressureType offault:


Possible Cause:



• AtmosphericPressure Sensoroutput is toohigh or too low(abnormal value)

• Minor enginederate

• Faulty Atmospheric Pressure Sensor• Faulty Engine Management System

(EMS) Module




• N/A • Internal fault in the EngineManagement System (EMS) Module

• Faulty Atmospheric Pressure Sensor


normal or shortedto low source

• A short to groundon the meteringside

• N/A • Internal fault in the EngineManagement System (EMS) Module

• Faulty Atmospheric Pressure Sensor

22


MID 128 PID 110 Coolant TemperatureType offault:


Possible Cause:



• The EngineCoolantTemperature(ECT) Sensoris indicating anunphysical value


• Extreme driving condition• Faulty coolant thermostat• Malfunctioning fan• Blocked radiator



• The EngineCoolantTemperature(ECT) Sensoroutput is too highor too low

• May affectdriveability inextreme cases


• Faulty Engine Coolant Temperature(ECT) Sensor or EngineManagement System (EMS)Module connector

• Break in Engine CoolantTemperature (ECT) Sensorharness

• Malfunctioning Engine CoolantTemperature (ECT) Sensor




• Idle runregulation isdeteriorated


• Internal fault in the Engine CoolantTemperature (ECT) Sensor harness

• Faulty Engine Coolant Temperature(ECT) Sensor connector

• Faulty Engine Coolant Temperature(ECT) Sensor




• Idle runregulation isdeteriorated


• An open in the Engine CoolantTemperature (ECT) Sensor circuit

• An open in the Engine CoolantTemperature (ECT) Sensor

• Intermittent fault in the EngineCoolant Temperature (ECT) Sensor

• Faulty Engine Coolant Temperature(ECT) Sensor connector

• Faulty Engine Coolant Temperature(ECT) Sensor


change• The Engine

CoolantTemperature(ECT) Sensoroutput is showinga constant value

• May affectvehicledriveability

• Faulty Engine Coolant Temperature(ECT) Sensor harness

• Engine Coolant Temperature (ECT)Sensor failure

23


MID 128 PID 111 Coolant LevelType offault:


Possible Cause:



• Moderatelybelow range



• Engine derate • Coolant level below range• Faulty harness• Engine shutdown



• Short Circuit +Measuring line

• Coolant level cannot be detected

• Faulty harness




• Coolant level cannot be detected

• Faulty harness



• Open Circuit • Coolant level cannot be detected

• Faulty harness

24


MID 128 PID 153 Crankcase PressureType offault:


Possible Cause:



• Out of range,max voltage,illegal

• Critically AboveRange

• Forced idle• Engine shut

down

• The non-filtered pressure difference(between crankcase pressure andambient air pressure) is/was abovelimit. (The fault code will remainduring the entire driving cycle(unless reset)



• Out of range, minvoltage, illegal

• N/A • Crankcase Pressure Sensor out ofrange



• Plausibility • N/A • The crankcase pressure is showingeither too high or too low value(abnormal value)





• N/A • Crankcase Pressure Sensor failure• Faulty harness



• Open Circuit +,5V Supply Line



• N/A • Crankcase Pressure Sensor failure• Faulty harness

25


MID 128 PID 171 Ambient TemperatureType offault:


Possible Cause:

FMI 9• Abnormal Update

Rate• This fault will

become activewhen the EngineManagementSystem (EMS)Module detectsthat the AmbientAir Temperaturemessage fromthe InstrumentCluster Moduledoes not exist.


• Faulty Ambient Air TemperatureSensor harness

MID 128 PID 173 Exhaust TemperatureType offault:


Possible Cause:


above normaloperational range— most severelevel

• Exhaust GasTemperature istoo high

• Engine derate• Poor driveability

• Faulty Exhaust Gas Temperature(EGT) system

• Faulty harness or connector




• Poor driveability • Harness connected to incorrectsensor

• Sensor failure



• Short to groundon the meteringside of the circuit

• Poor driveability • Sensor failure• Faulty harness



• Short to batteryon the meteringside of the circuit

• Open in themetering side ofthe circuit

• Open in theground side ofthe circuit

• Poor driveability • Faulty harness• Sensor failure


change• Sensor is stuck • Poor driveability • Sensor failure

26


MID 128 PID 175 Engine Oil TemperatureType offault:


Possible Cause:



• ModeratelyAbove range

• Critically AboveRange

• Engine derate • Extreme driving conditions



• Plausibility • In some casesmay havean effect ondriveability

• The oil temperature sensor outputis showing either too high or to lowvalue (abnormal value)




• N/A • Engine Oil Temperature (EOT)sensor failure

• Faulty harness




• Open Circuit

• N/A • Engine Oil Temperature (EOT)sensor failure

• Faulty harness

27


MID 128 PID 354 Relative HumidityType offault:


Possible Cause:



• Short to batteryin the meteringcircuit ofthe RelativeHumidity Sensor

• Open in theground circuitof the RelativeHumidity Sensor

• Turbochargernoise


• Faulty connector• Faulty Relative Humidity Sensor

harness• Faulty Relative Humidity Sensor



• Open in themetering circuitof the RelativeHumidity Sensor

• Open in the 5volt supply circuitof the RelativeHumidity Sensor

• Short to groundin the meteringcircuit ofthe RelativeHumidity Sensor

• Turbochargernoise


• Faulty connector• Faulty Relative Humidity Sensor

harness• Faulty Relative Humidity Sensor

28


MID 128 PID 411 EGR Exhaust Back PressureType offault:


Possible Cause:



• EGR differentialpressure sensoroutput is too highor too low

• Uneven running• Engine derate

• Faulty EGR Differential PressureSensor connector

• Faulty EGR Differential PressureSensor harness

• Faulty EGR Differential PressureSensor

• EGR leakage• Clogged EGR cooler• Clogged EGR venturi



• Short to batteryin metering line

• Open in theground circuit

• Engine respondspoorly

• Engine derate






• Open in the 5 voltsupply line

• Short to groundin metering line

• Open in themetering line


• Engine derate




29


MID 128 PID 412 EGR TemperatureType offault:


Possible Cause:



• N/A • Malfunctionindicator lampilluminated

• Extreme driving conditions• EGR cooler failure



• Short to groundon the meteringside of the EGRSensor circuit


• Engine powerwill be deratedaccording to theerror torque map

• Faulty EGR Temperature Sensorconnector

• Faulty EGR Temperature Sensorharness

• Faulty EGR Temperature Sensor



• Short to batteryin the meteringside of the EGRSensor circuit

• Open in themetering side ofthe EGR Sensorcircuit

• Open circuit inthe ground line ofthe EGR Sensorcircuit


• Engine derate



• Faulty EGR Temperature Sensor


change• EGR sensor

is showing aconstant valuethat will notchange




• EGR system leakage

30


MID 128 PPID 35 EGR Mass FlowType offault:


Possible Cause:



• EGR flow is toohigh

• Poor driveability • Faulty EGR system• Faulty harness or connector


below normaloperational range— most severelevel

• EGR flow is toolow

• Poor driveability • Faulty EGR system• Clogged EGR cooler• Faulty harness or connector

MID 128 PPID 89 Variable Geometry Turbocharger Smart Remote

Actuator TemperatureType offault


Possible Cause


above normaloperationalrange-most severelevel

• VGT SRAtemperature ismoderately toohigh

• Engine derate • Coolant system malfunction• Extreme driving conditions• Overheated VGT actuator

31


MID 128 PPID 122 Engine Compression BrakeType offault


Possible Cause



• Below range • No VolvoCompressionBrake (VCB)

• Low engine oil temperature



• Short Circuit + • VolvoCompressionBrake (VCB) cannot be turned on

• Engine brakefunction derated

• Gear shiftperformancederated forsome automatictransmissionboxes

• Faulty Volvo Compression Brake(VCB) actuator

• Faulty harness



• Short Circuit - • VolvoCompressionBrake (VCB) cannot be turned off

• Engine stopsrunning

• Engineimpossible torestart


• Faulty harness



• Open Circuit • VolvoCompressionBrake (VCB) cannot be turned on

• Engine brakefunction derated

• Gear shiftperformancederated forsome automatictransmissionboxes


• Faulty harness

32


MID 128 PPID 270 NOx SensorMID 233 Fault code sent by MID 128 Enginecontrol unit.

Type offault


Possible Cause



• Removed• Plausibility


• NOx sensor removed (measuressurround air)

• Exhaust system leakage• Air intake leakage• Faulty NOx sensor



• Short Circuit,NOx signal

• N/A • Faulty cabling between NOx sensorand NOx sensor ECU

• Faulty NOx sensor



• Open Circuit,NOx signal

• N/A • Faulty cabling between NOx sensorand NOx sensor ECU

• Faulty NOx sensor


rate (missingsensor signal

• Abnormal update • N/A • Missing signal from NOx sensor


change• Stuck • N/A • Exhaust system leakage

• Air intake leakage• Faulty NOx sensor

FMI 12• Bad Intelligent

Device orComponent

• Incorrect value • N/A • Faulty NOx sensor

FMI 13• Out of calibration • Range check • N/A • Faulty NOx sensor

FMI 14• Special

instructions• Missing signal

from sensor dueto battery voltage

• N/A • Voltage to NOx sensor is too high

33


MID 128 PPID 272 Air Pressure CompensationType offault:


Possible Cause:



• Short Circuit - • Possible turbonoise

• Faulty Intake Air Temperature andHumidity (IATH) sensor

• Faulty harness• Faulty Intake Air Temperature and

Humidity (IATH) sensor connector



• Short Circuit +• Open Circuit

• Possible turbonoise

• Faulty Intake Air Temperature andHumidity (IATH) sensor

• Faulty harness• Faulty Intake Air Temperature and

Humidity (IATH) sensor connector

MID 128 PPID 326 Soot LevelType offault:


Possible Cause:



• Moderately highsoot load

• Medium to highengine derate

• Diesel Particulate Filter (DPF)clogged

• After Treatment Fuel Injectorclogged

• Regeneration disabled by driver orother component

FMI 11• Critically high soot

load• Critically high

soot load• High engine

derate• Engine derate

• Diesel Particulate Filter (DPF)clogged

• After Treatment Fuel Injectorclogged

• Regeneration disabled by driver orother component

34


MID 128 PPID 328 Aftertreatment Injection Shutoff ValveType offault:


Possible Cause:



• Circuit shorted tobattery


• Faulty harness• Actuator failure



• Circuit shorted toground





• Open circuit • Malfunctionindicator lampilluminated


FMI 7• Mechanical system

not responding orout of adjustment

• After TreatmentFuel Injectorstuck closed


• Shut off valve stuck closed

FMI 14• Special

instructions• After Treatment

Fuel Injectorleaking


• After Treatment Fuel Injector failure

MID 128 PPID 329 Aftertreatment Fuel InjectorType offault:


Possible Cause:



• Circuit shorted tobattery


• Faulty harness• Injector failure



• Circuit shorted toground





• Open circuit • Malfunctionindicator lampilluminated




• After treatmentfuel injectorclogged



FMI 14• Special

instructions• After Treatment

Fuel Injectorleaking



35


MID 128 PPID 330 DRVType offault:


Possible Cause:



• Short circuit + • On/off valve can’tbe activated

• Regenerationnot possible

• High enginebraking withoutrequest

• Driveabilityaffected

• Faulty Discharge Recirculator Valve(DRV) Solenoid

• Faulty harness• Faulty Discharge Recirculator Valve

(DRV) Solenoid connector



• Short circuit- • Valve constantlyactivated

• Major enginederate

• Exhaust manifoldoverheating

• Engine shutdown






• Open circuit • On/off valve can’tbe activated









• MechanicallyStuck

• On/off valve can’tbe activated




• Valve constantlyactivated

• Major enginederate

• Exhaust manifoldoverheating

• Engine shutdown

• Leaking pipes• Faulty Discharge Recirculator Valve

(DRV) Solenoid

36


MID 128 PPID 337 Ash LevelType offault:


Possible Cause:



• Ash level too high • Need service • Short intervals between filterregenerations

FMI 14• Special

instructions• Igniters or fuel

nozzle needservice

• Need service • Time and driving conditions requirecomponent service

MID 128 PPID 387 Temperature Sensor, Catalytic ConverterType offault:


Possible Cause:





• Sensor failure










• Poor driveability • Faulty harness• Actuator failure



37


MID 128 PPID 436 Exhaust Gas Temperature Sensor 3Type offault:


Possible Cause:





• Sensor failure










• Poor driveability • Faulty harness• Actuator failure



38


MID 128 PPID 437 Aftertreatment Injector Fuel Pressure SensorType offault:


Possible Cause:




• N/A • Faulty shut off valve• Sensor failure




• Open in theground line

• N/A • Faulty harness• Sensor failure



• Open circuit inthe 5 volt supply

• Short circuit toground in themetering line

• Open circuit inthe metering line

• N/A • Faulty harness• Sensor Failure


change• After treatment

injector fuelpressure sensorstuck

• N/A • Sensor• Faulty shut off valve• Injector failure

39


MID 128 PSID 47 Particulate Trap RegenerationType offault:


Possible Cause:



• Plausability, toohigh


• Faulty After Treatment Injector



• Plausability, toolow


• Faulty After Treatment Injector• Faulty Diesel Particulate Filter (DPF)

catalyst

FMI 8• Abnormal

frequency, pulsewidth or period

• Regenerationperiod too long

• N/A • N/A


Device orComponent

• Regenerationefficiency too low

• N/A • Clogged After Treatment Injector• Diesel Particulate Filter (DPF)

catalyst damaged• Diesel Particulate Filter (DPF)

catalyst clogged

MID 128 PSID 98 Boost Air SystemType offault:


Possible Cause:



• Boost pressureis too high

• Turbochargersurge

• EGR system failure• Faulty turbocharger actuator


below normaloperational range— most severelevel

• Boost pressureis too low

• Engine derate• Engine slow to

respond

• Faulty Boost Air System hoses,pipes, brackets, cooler, EGR systemcomponents and turbo components

40


MID 128 PSID 108 Aftertreatment Injection SystemType offault:


Possible Cause:


not responding, orout of adjustment

• Mechanicalproblem


• Engine derate• Engine shut

down

• Faulty After Treatment Injection (ATI)system

41


MID 128 PSID 109 Engine Coolant Temperature SensorType offault:


Possible Cause:

FMI 7• Thermostat

blocked closed• This fault will

become activewhen the EngineManagementSystem (EMS)Module detectsthat theEngine CoolantTemperature(ECT) Sensoroutput is high butstill with in theacceptable rangefor the sensor.

• The CoolantTemperatureSensor isindicating ahigh coolanttemperature.


• Thermostat Blocked Closed• Faulty radiator fan• Clogged radiator

FMI 12• Thermostat

blocked open• This fault will

become activewhen the EngineManagementSystem (EMS)Module detectsthat theEngine CoolantTemperature(ECT) Sensoroutput is low butstill with in theacceptable rangefor the sensor.

• Poor heat in cab• Malfunction


• Thermostat Blocked Open

42


MID 128 SID 1/2/3/4/5/6 Unit InjectorType offault:


Possible Cause:

FMI 3• Voltage high/open • EMS module

detects a shortcircuit to batteryon the low sideof the Spill Valve(SV)/NeedleControl Valve(NCV).

• Loss of power• Uneven running• Running on 3 to

5 cylinders• Malfunction


• Open circuit



• EMS detects ashort circuit tobattery positive,a short circuitto ground, or anopen circuit onthe high side ofthe SV/NeedleControl Valve(NCV) or a ShortCircuit to groundon the low side ofthe SV/NCV.

• Loss of power• Uneven running• Running on 3 to

5 cylinders• Malfunction


• Harness shorted or open• Faulty fuel injector solenoid


not responding• Cylinder

balancing data isabove the limit

• Erratic engineidle speed

• Clogged fuel injector(s)• Low fuel pressure• Poor Compression• Improper valve adjustment

FMI 12• Failed Device

(Low injector holdcurrent)

• Injector orharnessresistance toohigh

• Loss of power• Uneven running• Malfunction


• Injector solenoid resistance out ofspecification

• Harness resistance too high

FMI 14• Special

instructions• Fuel injector flow

is too low or high.• Cylinder

compressionis low.

• Loss of power• Uneven running• Malfunction


• Low injector flow• High injector flow• Poor compression

43


MID 128 SID 18 Drain Valve, Water SeparatorType offault:


Possible Cause:



• Short Circuit +Measuring line

• Valve constantlyshut

• Faulty Water In Fuel (WIF) SolenoidValve

• Broken wire




• High fuelconsumption dueto fuel leakage


• Broken wire



• Open Circuit • Valve constantlyshut


• Broken wire

44


MID 128 SID 21 Engine Position Timing SensorType offault:


Possible Cause:



• Phase Error- Incorrectcorrelationbetween CAMand CrankSensor

• Increased fuelconsumption

• Faulty connector• Faulty Engine Position Timing

Sensor harness• Faulty Engine Position Timing

Sensor• Improper air gap


normal, or shortedto high source

• Missing Signalfrom EnginePosition TimingSensor

• Open in theEngine PositionTiming SensorCircuit

• Short to batteryin the EnginePosition TimingSensor Circuit

• Short to groundin the EnginePosition TimingSensor Circuit

• Increasedengine start time

• Loss of enginepower

• Faulty Engine Position TimingSensor harness

FMI 8• Abnormal


• Noisy Signalfrom EnginePosition TimingSensor

• Open in theEngine PositionTiming SensorCircuit



• Faulty Engine Position TimingSensor harness

• Faulty Engine Position TimingSensor mounting

45


MID 128 SID 22 Engine Speed SensorType offault:


Possible Cause:



• Intermittent orweak signal


• Imprecise enginetiming


• Uneven cylinderbalancing

• Power loss• Smoke

• Faulty connector• Faulty Engine Speed Sensor

harness• Faulty Engine Speed Sensor• Improper air gap



• Missing Signalfrom EngineSpeed Sensor

• Open in theEngine SpeedSensor Circuit

• Short to batteryin the EngineSpeed SensorCircuit

• Short to groundin the EnginePosition TimingSensor Circuit


• Vehicle may be inlimp home mode


• Faulty Engine Speed Sensorharness

• Faulty Crank Sensor mounting

FMI 8• Abnormal


• Erratic orintermittentsignal fromEngine SpeedSensor

• Open in theEngine SpeedSensor


• Imprecise enginetiming


• Uneven cylinderbalancing

• Power loss• Smoke

• Faulty Engine Speed Sensorharness

• Faulty Engine Speed Sensormounting

46


MID 128 SID 27 Variable Geometry TurbochargerType offault:


Possible Cause:



• Smart remoteactuator hasnot seen a validcommand onCAN2

• Incorrect data

• Low boost• Low power• Nozzle opens• Smoke from

engine

• Disturbance on CAN2 data lines


normal, or shortedto low source

• Short to ground • Nozzle will openresulting in lowpower and lowboost

• SRA willcontinue toattempt andmaintain targetnozzle position

• Faulty SRA VGT connector• Faulty SRA VGT harness• Low battery voltage



• Mechanicalproblem withthe VGT SRA

• Low boost andsmoke

• Possible enginederate

• Power loss insome caseswhen actuatormotor has beendisabled

• Actuator motor effort is temporarilylimited to prevent overheating

• Restrictions detected when runninglearn sequence

• SRA is slow to follow commands• SRA position is not tracking

command


rate• Data from the

SRA has beenmissing for2-seconds

• Engine derated(major)

• EGR valveclosed

• Data line harness• No supply to VGT actuator• VGT actuator• VGT SRA connector

FMI 13• Out of calibration • Failed self-

calibration• N/A • Smart remote actuator

47


MID 128 SID 33 Fan ControlType offault:


Possible Cause:


normal, or shortedTo high source

• Short to positivein the CoolingFan controlcircuit


• Broken Cooling Fan Actuator• Faulty Cooling Fan Actuator harness

or connector


normal, or shortedto low source

• Short to groundin the CoolingFan controlcircuit

• Output voltageis 1/3 the supplyvoltage



or connector



• Open in theCooling Fancontrol circuit



or connector

MID 128 SID 70 Preheater Element 1Type offault:


Possible Cause:




• Fuse for shortingwire blown

• Faulty Preheat Relay• Short in high side of Preheat Sense

1 circuit




• Shorting wiremay break

• Preheat relay problem• Sense 1, Short Circuit -, Measuring

line



• Open Circuit • May get startproblems in coldclimate

• Faulty Heating element• Broken wire

48


MID 128 SID 71 Preheater Element 2Type offault:


Possible Cause:




• Fuse for shortingwire blown

• Faulty Preheat Relay• Short in high side of Preheat Sense

2circuit




• Shorting wiremay break

• Preheat relay problem• Sense 2, Short Circuit -, Measuring

line



• Open Circuit • May get startproblems in coldclimate

• Faulty Heating element• Broken wire

MID 128 SID 146 EGR Valve 1Type offault:


Possible Cause:



• Stuck EGRControl Valve

• EGR ControlValve circuitshorted topositive

• EGR ControlValve circuitshorted toground


• Engine derate

• Faulty EGR Control Valve actuator• EGR Control Valve harness



• Open EGRControl ValveCircuit


• Engine derate

• Faulty EGR Control Valve actuator• EGR Control Valve harness

FMI 7• Mechanical

System NotResponding orOut Of Adjustment

• EGR Valve stuckclosed

• Engine derate • Faulty EGR Valve


Device orComponent

• EGR Valve stuckopen

• Engine derate • Faulty EGR Valve

49


MID 128 SID 211 5 Volt DC SupplyType offault:


Possible Cause:



• N/A • Strangeinformationdisplayed oncluster

• Poor driveability

• 5 volt reference circuit shorted topositive

• Faulty harness or connector• Faulty sensor power supply• MID 128 PID’s 94, 100 and 153 may

also be set

FMI 4• Voltage Below

Normal, or ShortedTo Low Source



• 5 volt reference circuit shorted toground


also be set

MID 128 SID 230 Idle Validation Switch 1Type offault:


Possible Cause:



• IVS signalshorted tovoltage

• No IVS limphome functionfor pedal position

• Faulty connector• Faulty VECU• Short to voltage in signal circuit

harness

FMI 5• Current Below

Normal or OpenCircuit

• IVS signalshorted toground or open

• No IVS limphome functionfor pedal position

• Faulty connector• Faulty VECU• Short to ground or open in signal

circuit harness

50


MID 128 SID 232 5 Volt DC Supply to SensorType offault:


Possible Cause:





• Poor driveability• Faulty harness or connector• Faulty sensor power supply• MID 128 PID’s 26, 102 and 411 may

also be set





• 5 volt reference circuit shorted toground


also be set

51

D

Volvo Truck North America a division of Volvo Group North America, Inc.P.O. Box 26115, Greensboro, NC 27402-6115

Volvo Trucks Canada, Ltd.5600A Cancross Court, Mississauga, Ontario L5R 3E9

http://www.volvotrucks.volvo.com

PV776-20184635 () 10.2008 © Volvo Truck North America a division of Volvo Group North America, Inc., 2008

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