Technical Journal - Autonerdz

VOLVO CARS

SERVICE AND PARTS BUSINESS

Technical JournalTITLE:

Voltage Regulator replacement recommended instead of alternator replacement

REF NO:

TJ 26897

ISSUING DEPARTMENT:

Technical Service

CAR MARKET:

United States and Canada

PARTNER:

3 US 7510 Volvo Cars North America

ISSUE DATE:

YEAR MONTH DAY

2014 01 10FUNC GROUP:

3211FUNC DESC:

alternator, complete Page 1 of 3

Produced in the USA and available as an electronic document. Hard copy documents are printed in USA on recycled paper containing a minimum of 50% wastepaper and 10% post-consumer waste.

© 2014 VOLVO CARS OF NORTH AMERICA, LLC

“Right first time in Time”

Attachment

File Name File SizeACM.PNG 0.0450 MBElectrical Connections.PNG 0.3724 MBLIN_tip_sheet.pdf 0.5235 MBSlip_Ring_Wear.jpg 0.0530 MB

Vehicle Type

Type Eng Eng Desc Sales Body Gear Steer Model Year Plant Chassis range Struc Week

Range124 0-0 - 0-0134 0-0 - 0-0135 0-0 - 0-0136 0-0 - 0-0156 0-0 - 0-0275 0-0 - 0-0285 0-0 - 0-0295 0-0 - 0-0384 0-0 - 0-0533 0-0 - 0-0542 0-0 - 0-0544 0-0 - 0-0545 0-0 - 0-0

Page 2 of 3 2014-01-10

Technical Journal 26897

CSC Customer Symptom Codes

Code DescriptionLO Alternator and charge regulator/Power supply problems

DTC Diagnostic Trouble Codes

Control Module Code Fault TypeCEM U300316 IntermittentBCM U300316 IntermittentPBM U300013 IntermittentDIM B1B6916 IntermittentSRS U300316 IntermittentECM P062001 IntermittentECM P062074 IntermittentECM P065C00 IntermittentECM P065A00 IntermittentECM P062001 IntermittentTCM P056100 IntermittentTCM P056200 IntermittentECM P062074 IntermittentECM P056200 IntermittentECM P070000 IntermittentECM P056200 IntermittentECM B108700 IntermittentECM U012000 Intermittent

Rows beginning with * are modified Note! If using a printed copy of this Technical Journal, first check for the latest online version.

Text

Update: Alternators are being removed from the Prior Approval process as of January 13th, 2013.

DESCRIPTION:The majority of replaced alternators have had no faults with the alternator itself. As stated in VIDA, replacing only the voltage regulator (ACM, Alternator Control Module) is the recommended repair for an alternator that is not charging correctly.

Additional fault tracing information:Charging voltage: Normal charging voltage can vary depending on many factors such as battery state of charge, battery temperature, electrical loads, etc… The normal range is 13.5-14.8V with an average of 14.2V. In VIDA, “Quick test of alternator function” can be found in Fault tracing->Symptom Related Diagnostic Procedures->372.

2014-01-10 Page 3 of 3

Technical Journal 26897

Voltage drop:The total charging system voltage drop should be less than 0.7V. This is a sum of two measurements:

• Voltage drop from the alternator housing to the negative battery post.• Voltage drop from the alternator B+ terminal to the positive battery post.

LIN (Local Interconnect Network):

• The normal LIN voltage is 7-11V.• Voltage will be high (close to battery voltage) if the ciruit is open.• Voltage will be low (close to 0) if the circuit is shorted to ground.• FurtherLINinformationcanbefoundinVIDA:Information->ProductSpecifications->Design

and Function->37 Cables and fuses->LIN – Local Interconnect Network• Detailed LIN information including the attached tip sheet is found in Volvo Cars Performance

Academy Course 1367 - LIN Diagnostics

DTCs:One or more of the above DTCs may be set when there is a fault in the charging system.

Slip-ring inspection:When the ACM is removed from the alternator, the slip-rings should be visibly inspected for wear.

Light wear and polishing is acceptable. Heavy wear and deep scoring (see attached) indicates that the entire alternator should be replaced.

Noise:Noise is not necessarily caused by the alternator bearings; it may be due to the alternator pulley (one-way clutch).

VOLVO STANDARD TIMES GUIDE (VSTG) INFO:Operation number 32205 - Charge regulator replace - See VSTG

To view TJ attachments continue to next page. This TJ has 4 attachments.

Page 1 Issued: 12/10/10

LIN DIagNostIcs tIp sheet

LocaL Interconnect network (LIn) DIagnostIcsThis Tip sheeT is designed To help you:• Identify master and slave module hierarchy

• Recall fault analysis steps for various LIN-related fault issues

• Locate the path in VIdA for LIN diagnostic instructions

• Locate the path in diCe for calibration and fault checking

Note: The information in this tip sheet is meant to be used as a guide. Any fault analysis or diagnostics should be performed following the proper service procedures and/or wiring diagrams for the vehicle being diagnosed.

Master anD sLave MoDuLe hIerarchy exaMpLes p1 platform s40 (2004 – current), V50 (2005 – current), C70 convertible (2006 – current), C30 hatchback (2008 – current)

MasTer CoMp # slave appliCaTion CoMMenT

ceM 4/56

Gas discharge Lighting (GdL) master Bi-xenon cars w/o ABL

LIN bus 2Gas discharge Lighting (GdL) slave Bi-xenon cars w/o ABL

start Control unit (sCu)

steering Column Lock (sCL)

Remote Keyless entry Receiver (RKe) Cars with Keyless Vehicle system

LIN bus 3Remote Receiver Module (RRX) Cars w/o Keyless Vehicle Module

siren Control Module (sCM)

Rain sensor Module (RsM) Optional

LIN bus 9Humidity sensor (Hus) Optional

Wiper Motor Module (WMM)

Battery Monitoring sensor (BMs) LIN bus 14

ccM 3/112

BLIs/PAs switches

LIN bus 1damper Motor Module (dMM) Temp Left side

damper Motor Module (dMM) Floor/Vent distribution

seat Heater Module (sHM) driver’s side

Air Quality sensor (AQs) Cars with Interior Air Quality system (IAQs)

LIN bus 2

damper Motor Module (dMM) Recirculation

damper Motor Module (dMM) Temp Right side

damper Motor Module (dMM) defrost

seat Heater Module (sHM) Passenger side

DDM 3/126Left Camera Module (LCM) Cars with BLIs

Left Rear door Module (LdM)



p1 platform cont.


ecM 4/46 Alternator Control Module (ACM)

hcM 4/114Left Headlamp Control unit (LHCu) Cars with Active Bi-Xenon Lights (ABL)

Right Headlamp Control unit (RHCu) Cars with Active Bi-Xenon Lights (ABL)

IcM 16/1.2 steering Wheel Module (sWM) Audio controls on steering wheel

KVM 4/93 Remote Keyless entry Receiver (RKe) Cars with Keyless Vehicle system

pDM 3/127Right Camera Module (RCM) Cars with BLIs

Right Rear door Module (RdM)

tcM 4/28 Gear selector Module (GsM)

p2 platform s80 (2005 – 2006), s60 (2005 – 2009), V70 (2005 – 2007), XC70 (2003 – 2007), XC90 (2003 – current)


ceM 4/56

Alternator Control Module (ACM) except XC90 V8

Left Camera Module (LCM) Cars with BLIs only

Light switch Module (LsM)

Right Camera Module (RCM) Cars with BLIs only

steering Wheel Module (sWM) Turn signal and wiper stalks, Cruise Control switches, Audio controls on steering wheel (except XC90)

ccM 3/112

damper Motor Module (dMM) Temperature Left

LIN bus 1damper Motor Module (dMM) Floor/Vent

seat Heater Module (sHM) driver’s seat

Air Quality sensor (AQs) Optional

LIN bus 2

damper Motor Module (dMM) defrost

damper Motor Module (dMM) Recirculate

damper Motor Module (dMM) Temperature Right

seat Heater Module (sHM) Front passenger seat

ecM 4/46 Alternator Control Module (ACM) XC90 V8

hcM 4/118Left Headlamp Control unit (LHCu) Cars with Active Bi-xenon (ABL)

Right Headlamp Control unit (RHCu) Cars with Active Bi-xenon (ABL)

IcM 16/94 steering Wheel Module (sWM) Audio controls on steering wheel (XC90)

paM 4/86 Park Assist Camera (PAC)

ReM 4/58Inclination sensor Module (IsM) Optional

Parking Assistance Module (PAM) Optional for XC90 2003 and newer, all others from 2005

sRs 4/9 Occupant Weight sensor (OWs)

tcM 4/28Communication to Gear selector Module (GsM)

UeM 4/70

Mass Movement sensor (MMs) Optional

Rain sensor Module (RsM) Optional

siren Control Module (sCM)

sunroof Module (sRM) Optional



p3 platform s80 (2007 – current), V70 (2008 – current), XC70 (2008 – current), XC60 (2010 – current), s60 (2011 – current)


ceM 4/56

Keyless Vehicle Module (KVM) Cars with keyless drive

LIN bus 0

Left Camera Module (LCM) Cars with BLIs (s60)

Right Camera Module (RCM) Cars with BLIs (s60)

Remote Keyless entry (RKe) Cars with keyless drive

Remote Receiver Module (RRX) Cars without Keyless Vehicle Module

Light switch Module (LsM)

LIN bus 1steering Wheel Module (sWM) Cruise control switches/Wiper controls/Horn/Turn signals/High beam

Infotainment Control Module (ICM) via sWM

siren Control Module (sCM) a.k.a. Battery Backed-up siren (BBs)

LIN bus 2Mass Movement sensor (MMs)

Heart Beat sensor (HBs)

Interior Movement sensor (IMs)

Immobilizer Antenna unit (IAu)

LIN bus 3start Control unit (sCu)

steering Column Lock (sCL)

Battery Monitoring sensor (BMs)

LIN bus 8Rain sensor Module (RsM)

Wiper Motor Module (WMM)

ccM 4/6

Air Quality sensor (AQs) If equipped with IAQs

damper Motor Module (dMM) Recirculation

LIN bus 1

damper Motor Module (dMM) Temp Left side

damper Motor Module (dMM) Floor/Ventilation

Rear seat Heater switch (3/65) If equipped with heated rear seats

seat Heater Module (sHM) seat heating Front Left

seat Heater Module (sHM) seat heating Rear Left

damper Motor Module (dMM) Temp Right side

LIN bus 2

damper Motor Module (dMM) defroster

Humidity sensor (Hus)

Rearview Mirror Auto-dimming with integrated Hus

seat Heater Module (sHM) seat Heating Front Right

seat Heater Module (sHM) seat Heating Rear Right

DDM 3/126Left Camera Module (LCM) Cars with BLIs

Left Rear door Module (LdM)

ecM 4/46Alternator Control Module (ACM)

Coolant Temp sensor (7/200) six cylinder

hcM 4/118Left Headlight Control unit (LHCu) Cars with Active bi-xenon lighting

Right Headlight Control unit (RHCu) Cars with Active bi-xenon lighting

IcM 3/281 steering Wheel Module (sWM) Audio/Nav controls on steering wheel

KVM 4/93 Remote Keyless entry (RKe) Cars with Keyless Vehicle Module

paM 4/86 Park Assist Camera (PAC) Cars with Park Assist Camera

pDM 3/127Right Camera Module (RCM) Cars with BLIs

Right Rear door Module (RdM)

tcM 4/28 Gear selector Module (GsM)



FaulT CondiTions and analysisFault conditions you may encounter include short to ground, short to power, slave node does not communicate, and no LIN slave functionality.

short to ground: With a short to ground fault, no LIN communication is possible. To analyze a short to ground:

1. Familiarize yourself with the LIN bus you are working on by reviewing the components listed in the wiring diagram and VIdA.

2. Find the wire for the LIN bus communication and monitor the voltage. If the voltage is 0V, then the communication wire is shorted to ground.

3. If the voltage is found to be 0V, disconnect the nodes one at a time and note the voltage. If the voltage changes from 0V, then that node should be

investigated for the root cause.

4. If all of the slave nodes are disconnected and the voltage still remains at 0V, then the issue is with the wiring or the master node. The wiring must be

inspected for a short to ground.

5. If the wiring is found to be fault free, the master node can be diagnosed using the breakout box with the LIN harness disconnected.

slave Node Does Not communicate: To analyze a slave node does not communicate fault:

1. Check that the fault code is still present.

2. Check for power and ground at the slave node in question.

3. Check communication wire for proper voltage. ubat is short to power; ulow is short to ground. You should observe 7 – 9V when using a dVOM or a

digital signal oscillating between ubat and ulow if using the Vantage Pro (mandatory tool).

4. If the wiring all checks out, then the issue lies within the component and the component should be replaced.

No LIN slave Node Functionality: To analyze a no LIN slave node functionality fault:

Check CarConfig via the details screen in VIdA to determine if the slave node has been added to the vehicle in error. If the node has been physically added

but the CarConfig has not been updated, then the function will not operate.

ensure that the accessory node has been properly installed using the correct software.

vIDa InforMatIon on LIn DesIgn anD functIonFollow this path in VIdA for detailed information on LIN design and function:

1. Information

2. Product specifications

3. design and Function

4. 3 electrical system

5. 37 Cables and fuses

6. LIN – Local Interconnect Network

under LIN – Local Interconnect Network, there are five subcategories:

• Control modules that communicate via LIN

• error management in the Local Interconnect Network (LIN)

• LIN (Local Interconnect Network)

• Network

• Network structure

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Technical Journal - Autonerdz