Engine Control Module (ECM) Diagnostic Trouble Codes - 7 of 9: Wiring Volvo V50 I рестайлинг

CHECKING THE COMPONENTS AND WIRING

Check the signal cable between engine control module (ECM) #A79 (#B19) and electric cooling fan module's connector #1 for short-circuit to voltage.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S26583508152012042500000)
3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)

Scheme 172

Scheme 173

1. Continue Refer to «VERIFICATION»(ref-466669-S07834028752012042500000)

Check the signal cable between engine control module (ECM) #B7 (#C7) and engine cooling fan control module #1 for short-circuit to voltage.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S15475582172012042500000)
3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S36604941302012042500000)

Check the signal cable between Engine control module (ECM) #A79 (#B19) and electric cooling fan module's connector #1 for short-circuit to ground and open circuit.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S26583508152012042500000)
3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S04526509332012042500000)

Check the signal cable between Engine control module (ECM) #B7 (#C7) and electric cooling fan module's connector #1 for short-circuit to ground and open circuit.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S15475582172012042500000)
3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S14686495682012042500000)

CHECKING THE COMPONENT AND WIRING

Check the fuse for the circuit.

Check the camshaft reset valve connector. Check for contact resistance. Check for oxidation.

Check the signal cable between engine control module (ECM) terminal #A72 (#B12) and camshaft reset valve terminal #2. Check for an open-circuit.

Check the power cable between camshaft reset valve terminal #1 and the system relay. Check for an open-circuit.

HINT: With the ignition switched on, the reading must be approximately 12 V between camshaft reset valve terminal #1 and ground.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) (2005), or «SIGNAL SPECIFICATION»(ref-466592-S15491428272012042500000) (2006-2007)
3. see «VVT SOLENOID»(ref-466659-S08868277172012042500000)
4. see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000)

Scheme 174

1. Continue Refer to «VERIFICATION»(ref-466669-S15482986902012042500000)

Check the signal cable between engine control module (ECM) terminal #A72 (#B12) and camshaft reset valve terminal #2. Check for a short-circuit to supply voltage.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) (2005), or «SIGNAL SPECIFICATION»(ref-466592-S15491428272012042500000) (2006-2007)
3. see «VVT SOLENOID»(ref-466659-S08868277172012042500000)
4. see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S26765637362012042500000)

Check the camshaft reset valve connector. Check for contact resistance. Check for oxidation.

Check the signal cable between engine control module (ECM) terminal #A72 (#B12) and camshaft reset valve terminal #2. Check for a short-circuit to ground.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) (2005), or «SIGNAL SPECIFICATION»(ref-466592-S15491428272012042500000) (2006-2007)
3. see «VVT SOLENOID»(ref-466659-S08868277172012042500000)
4. see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S33693508702012042500000)

Check the fuse for the circuit.

Check the camshaft reset valve connector. Check for contact resistance. Check for oxidation.

Check the signal cable between engine control module (ECM) terminal #A96 (#B36) and camshaft reset valve terminal #2. Check for an open-circuit.

Check the power cable between camshaft reset valve terminal #1 and the system relay. Check for an open-circuit.

HINT: With the ignition switched on, the reading must be approximately 12 V between camshaft reset valve terminal #1 and ground.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) (2005), or «SIGNAL SPECIFICATION»(ref-466592-S15491428272012042500000) (2006-2007)
3. see «VVT SOLENOID»(ref-466659-S08868277172012042500000)
4. see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S14937288372012042500000)

Check the signal cable between engine control module (ECM) terminal #A96 (#B36) and camshaft reset valve terminal #2. Check for a short-circuit to supply voltage.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) (2005), or «SIGNAL SPECIFICATION»(ref-466592-S15491428272012042500000) (2006-2007)
3. see «VVT SOLENOID»(ref-466659-S08868277172012042500000)
4. see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S02832182752012042500000)

Check the camshaft reset valve connector. Check for contact resistance. Check for oxidation.

Check the signal cable between engine control module (ECM) terminal #A96 (#B36) and camshaft reset valve terminal #2. Check for a short-circuit to ground.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) (2005), or «SIGNAL SPECIFICATION»(ref-466592-S15491428272012042500000) (2006-2007)
3. see «VVT SOLENOID»(ref-466659-S08868277172012042500000)
4. see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S08590021512012042500000)

Check the fuse for the circuit.

Check the cable between engine control module (ECM) terminal #B7 (#C7) and engine cooling fan (FC) module terminal #4. Check for a short-circuit to ground.

Check between engine cooling fan (FC) connector terminal #2 and ground. Check for an open-circuit.

Check the power cable between the fuse for the engine cooling fan (FC) module and engine cooling fan (FC) module connector terminal #1. Check for an open-circuit.

HINT: The voltage must be approximately 12 V between engine cooling fan (FC) module connector (wiring side) terminals #1 and #2.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) (2005), or «SIGNAL SPECIFICATION»(ref-466592-S15491428272012042500000) (2006-2007)
3. see «ENGINE COOLING FAN (FC)»(ref-479166-S33734270582012061200000)
4. see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S26084653822012042500000)

Check the fuse for the circuit.

Check the signal cable. Check for a short-circuit to ground.

Take readings between

1. Engine Control Module (ECM) #B8 (#C8) and electric cooling fan module #4.

Check between engine cooling fan (FC) connector terminal #2 and ground. Check for an open-circuit.

Check the power cable between the fuse for the engine cooling fan (FC) module and engine cooling fan (FC) module connector terminal #1. Check for an open-circuit.

HINT: The voltage must be approximately 12 V between engine cooling fan (FC) module connector (wiring side) terminals #1 and #2.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S15491428272012042500000)
3. see «ENGINE COOLING FAN (FC)»(ref-479166-S33734270582012061200000)
4. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S20548955742012042500000)

Check the cable between engine control module (ECM) terminal #B7 (#C7) and engine cooling fan (FC) module terminal #4. Check for a short-circuit to supply voltage.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) (2005), or «SIGNAL SPECIFICATION»(ref-466592-S15491428272012042500000) (2006-2007)
3. see «ENGINE COOLING FAN (FC)»(ref-479166-S33734270582012061200000)
4. see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S12980195682012042500000)

Check the signal cable. Check for a short-circuit to supply voltage.

Take readings between

1. Engine Control Module (ECM) #B8 (#C8) and electric cooling fan module #4.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S15491428272012042500000)
3. see «ENGINE COOLING FAN (FC)»(ref-479166-S33734270582012061200000)
4. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S40385054482012042500000)

Check the fuse for the circuit.

Check the air conditioning (A/C) relay connector. Check for contact resistance and oxidation.

Check the signal cable between engine control module (ECM) terminal #B10 (#C10) and air conditioning (A/C) relay terminal #2. Check for an open-circuit.

Check the power cable between the fuse and air conditioning (A/C) relay terminal #1. Check for an open-circuit.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) (2005), or «SIGNAL SPECIFICATION»(ref-466592-S15491428272012042500000) (2006-2007)
3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S00072254202012042500000)

Check the signal cable between engine control module (ECM) terminal #B10 (#C10) and air conditioning (A/C) relay terminal #2. Check for a short-circuit to supply voltage.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) (2005), or «SIGNAL SPECIFICATION»(ref-466592-S15491428272012042500000) (2006-2007)
3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S32325051732012042500000)

Check the signal cable between engine control module (ECM) terminal #B10 (#C10) and air conditioning (A/C) relay terminal #2. Check for a short-circuit to ground.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) (2005), or «SIGNAL SPECIFICATION»(ref-466592-S15491428272012042500000) (2006-2007)
3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S17137444902012042500000)

Check the cable between engine control module (ECM) terminal #A78 (#B18) and intake camshaft reset valve terminal #2. Check for an open-circuit.

Check the power supply cable between the system relay and intake camshaft reset valve terminal #1. Check for an open-circuit.

Check the fuse for the circuit.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S15475582172012042500000)
3. see «VVT SOLENOID»(ref-466659-S08868277172012042500000)
4. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S39051257452012042500000)

Check the cable between engine control module (ECM) terminal #A78 (#B18) and intake camshaft reset valve terminal #2. Check for an open-circuit.

Check the power supply cable between the system relay and intake camshaft reset valve terminal #1. Check for an open-circuit.

Check the fuse for the circuit.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S26583508152012042500000)
3. see «VVT SOLENOID»(ref-466659-S08868277172012042500000)
4. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S13419198182012042500000)

Check the cable between engine control module (ECM) terminal #A78 (#B18) and intake camshaft reset valve terminal #2. Check for a short-circuit to supply voltage.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S15475582172012042500000)
3. see «VVT SOLENOID»(ref-466659-S08868277172012042500000)
4. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S17291559592012042500000)

Check the cable between engine control module (ECM) terminal #A78 (#B18) and intake camshaft reset valve terminal #2. Check for a short-circuit to supply voltage.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S26583508152012042500000)
3. see «VVT SOLENOID»(ref-466659-S08868277172012042500000)
4. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S02564316742012042500000)

Check the cable between engine control module (ECM) terminal #A78 (#B18) and intake camshaft reset valve terminal #2. Check for a short-circuit to ground.

Check the power supply cable between the system relay and intake camshaft reset valve terminal #1. Check for a short-circuit to supply voltage.

Check the fuse for the circuit.

Check the connector for the intake camshaft reset valve. Check for contact resistance. Check for oxidation.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S15475582172012042500000)
3. see «VVT SOLENOID»(ref-466659-S08868277172012042500000)
4. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S09595757362012042500000)

Check the cable between engine control module (ECM) terminal #A78 (#B18) and intake camshaft reset valve terminal #2. Check for a short-circuit to ground.

Check the power supply cable between the system relay and intake camshaft reset valve terminal #1. Check for a short-circuit to supply voltage.

Check the fuse for the circuit.

Check the connector for the intake camshaft reset valve. Check for contact resistance. Check for oxidation.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S26583508152012042500000)
3. see «VVT SOLENOID»(ref-466659-S08868277172012042500000)
4. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S13666194392012042500000)

Check the cable between the engine control module (ECM) and the starter motor relay coil for open circuit.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S15475582172012042500000)
3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S31896123812012042500000)

Check the cable between the engine control module (ECM) and the starter motor relay coil for open circuit.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S26583508152012042500000)
3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S11706304412012042500000)

Check the cable between engine control module (ECM) terminal #B8 (#C8) and system relay coil terminal #2. Check for a short-circuit to supply voltage.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S15475582172012042500000)
3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S10481870762012042500000)

Check the cable between engine control module (ECM) terminal #B8 (#C8) and system relay coil terminal #2. Check for a short-circuit to supply voltage.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S26583508152012042500000)
3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S10018790932012042500000)

Check the cable between engine control module (ECM) terminal #B8 (#C8) and system relay coil terminal #2. Check for a short-circuit to ground. Check for an open-circuit.

Check the power supply to the starter motor.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S15475582172012042500000)
3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S22428376062012042500000)

Check the cable between engine control module (ECM) terminal #B8 (#C8) and system relay coil terminal #2. Check for a short-circuit to ground. Check for an open-circuit.

Check the power supply to the starter motor.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S26583508152012042500000)
3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S31161325282012042500000)

HINT: If the diagnostic trouble code (DTC) for the gear-shift position sensor is stored in the transmission control module (TCM), this diagnostic trouble code (DTC) must be remedied first.

1. Check the connector for the transmission control module (TCM) control module. Check for contact resistance. Check for oxidation. Check the signal cable between engine control module (ECM) terminal #B15 (#C15) and transmission control module (TCM) terminal #5. Check for an open-circuit. Check for a short-circuit to supply voltage. Check for a short-circuit to ground. Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) (2005), or «SIGNAL SPECIFICATION»(ref-466592-S15491428272012042500000) (2006-2007) see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S03023658302012042500000)

Check the fuse for the circuit (30-supply engine control module (ECM)).

Check the battery terminals. Check for contact resistance. Check for oxidation.

Check the battery terminals. Check for contact resistance. Check for oxidation.

Check the cable between engine control module (ECM) terminal #B54 (#C54) and the fuse for the circuit.

Check the condition of the battery and the function of the charging system.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S15475582172012042500000)
3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S42608468102012042500000)

Check the fuse for the circuit (30-supply engine control module (ECM)).

Check the battery terminals. Check for contact resistance. Check for oxidation.

Check the battery terminals. Check for contact resistance. Check for oxidation.

Check the cable between engine control module (ECM) terminal #B54 (#C54) and the fuse for the circuit.

Check the condition of the battery and the function of the charging system.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S26583508152012042500000)
3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S25461973652012042500000)

CHECKING COMPONENTS AND WIRING

Check the power cable between engine control module (ECM) terminal #B4 (#C4) and the system relay. Check for a short-circuit to supply voltage.

Try a new system relay if no fault is found during the above fault-tracing.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000)
3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000)

1. Continue Refer to «INFORMATION»(ref-466669-S40563714702012042500000)

Check the power supply cable. Check for a short-circuit to supply voltage.

Take readings between

1. Engine Control Module (ECM) #B3 (#C3) and system relay.

Try a new system relay if no fault is found during the above fault-tracing.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S15491428272012042500000)
3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)

1. Continue Refer to «INFORMATION»(ref-466669-S18901128012012042500000)

Check the power cable between engine control module (ECM) terminal #B4 (#C4) and the system relay. Check for an open-circuit.

Try a new system relay if no fault is found during the above fault-tracing.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000)
3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000)

1. Continue Refer to «INFORMATION»(ref-466669-S35807984932012042500000)

Check the power cable with regard to open circuit.

Take readings between

1. Engine Control Module (ECM) #B3 (#C3) and system relay.

Try a new system relay if no fault is found during the above fault-tracing.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S15491428272012042500000)
3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)

1. Continue Refer to «INFORMATION»(ref-466669-S34739230992012042500000)

Check the function of the charging system. Check for high charging.

HINT: Battery voltage must not exceed 16 V.

Remedy as necessary.

Other information

1. see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S04655962002012042500000)

Check the battery terminals. Check for contact resistance. Check for oxidation.

Check the condition of the battery and the function of the charging system.

Remedy as necessary.

Other information

1. see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S16320445902012042500000)

Check the signal cable between engine control module (ECM) terminal #B16 (#C16) and the system relay. Check for an open-circuit. Check for a short-circuit to supply voltage. Check for a short-circuit to ground.

Check the engine control module (ECM) and the system relay connector. Check for contact resistance. Check for oxidation.

Try a new system relay if no fault is found during the above fault-tracing.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000)
3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000)

1. Continue Refer to «INFORMATION»(ref-466669-S42392535122012042500000)

Check the signal line for open circuit, short-circuit to ground and short-circuit to voltage.

Take readings between

1. Engine Control Module (ECM) #B27 (#C27) and system relay #2.

Check the engine control module (ECM) and the system relay connector. Check for contact resistance. Check for oxidation.

Try a new system relay if no fault is found during the above fault-tracing.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S15491428272012042500000)
3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)

1. Continue Refer to «INFORMATION»(ref-466669-S35202922172012042500000)

Check the cable between engine control module (ECM) terminal #B16 (#C16) and system relay terminal #2. Check for a short-circuit to supply voltage. Check for short-circuit to ground.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S15475582172012042500000)
3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)

Scheme 175

1. Continue Refer to «VERIFICATION»(ref-466669-S25808761972012042500000)

Check the cable between engine control module (ECM) terminal #B16 (#C16) and system relay terminal #2. Check for a short-circuit to supply voltage. Check for short-circuit to ground.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S26583508152012042500000)
3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S26626727782012042500000)

Check the system relay connector. Check for contact resistance. Check for oxidation.

Check the condition of the battery and the function of the charging system.

Remedy as necessary.

HINT: The diagnostic trouble code (DTC) can be caused by a defective system relay.

Other information

1. see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S13150559632012042500000)

Check the battery voltage and condition.

Check the charging function of the generator (GEN).

Check the power cable between engine control module (ECM) terminal #B4 (#C4) and the system relay. Check for an open-circuit.

Check the signal cable between engine control module (ECM) terminal #B16 (#C16) and the system relay. Check for an open-circuit.

Check the engine control module (ECM) and the system relay connector. Check for contact resistance. Check for oxidation.

Try a new system relay if no fault is found during the above fault-tracing.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000)
3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S05251896242012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S39037577582012042500000)

Check the battery voltage and condition.

Check the charging function of the generator (GEN).

Check the power cable with regard to open circuit.

Take readings between

1. Engine Control Module (ECM) #B3 (#C3) and system relay.

Check the cable for an open-circuit.

Take readings between

1. Engine Control Module (ECM) #B27 (#C27) and system relay.

Check the engine control module (ECM) and the system relay connector. Check for contact resistance. Check for oxidation.

Try a new system relay if no fault is found during the above fault-tracing.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S15491428272012042500000)
3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)

1. Continue Refer to «VERIFICATION»(ref-466669-S32275657332012042500000)

CHECKING THE WIRING

The diagnostic trouble code (DTC) is stored if there is no communication between the engine control module (ECM) and the alternator control module (ACM). This may be due to a fault in the signal cable between the control modules or a damaged communication device in one or both of the control modules.

HINT: This diagnostic trouble code (DTC) can be stored if a generator (GEN) with an alternator control module (ACM) (charge regulator) not intended for LIN communication is installed.

Check the connector on the alternator control module (ACM). Check for contact resistance and oxidation.

Check the signal cable. Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.

Take readings between

1. Engine control module (ECM) #A46 (#A46) and alternator control module (ACM) #B2.

HINT: Another test to check the alternator's function is to perform Quicktest of alternator function using VIDA or appropriate scan tool.

Remedy as necessary.

Other information

1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
2. see «SIGNAL SPECIFICATION»(ref-466592-S15491428272012042500000)
3. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)

Was a fault detected?

1. YES Refer to «INFORMATION»(ref-466669-S02653120982012042500000)
2. NO Refer to «REPLACING THE CONTROL MODULE»(ref-466669-S15462030402012042500000)