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Engine Control Module (ECM) Diagnostic Trouble Codes - 11 of 13: Wiring Volvo XC90 I

Testing & Diagnostics ~1091 words

CHECKING COMPONENTS AND WIRING

  1. Ignition off Check the fuse for the signal cable from the ignition lock. If the fuse has blown, check the cable. Check for a short-circuit to ground. Disconnect the engine control module (ECM). Check the signal cable from the ignition lock. Check for a short-circuit to supply. Check for an open-circuit. Measure between: Engine control module (ECM) terminal #B17 and the central electronic module (CEM). Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-476691-S27857399862012060500000) see «SIGNAL SPECIFICATION, ENGINE CONTROL MODULE (ECM)»(ref-476694-S30016655152012060500000) see «LOCATION OF COMPONENTS, ENGINE COMPARTMENT»(ref-476766-S16137402102012060500000) see «COMPONENT SPECIFICATIONS»(ref-476694-S25047767552012060500000) see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476782-S17227883182012060500000)

Note. If diagnostic trouble code for alternator is stored, then troubleshoot that diagnostic trouble code first.

Check the battery's connections for contact resistance and oxidation.

Check the system relay's connector for contact resistance and oxidation.

Check the charging system's function for low voltage.

HINT: Read off the battery voltage using the VCT2000 (or appropriate scan tool).

  1. Continue Refer to «VERIFICATION»(ref-476782-S04833991392012060500000)

Note. If diagnostic trouble code for alternator is stored, then troubleshoot that diagnostic trouble code first.

Check the battery's connections for contact resistance and oxidation.

Check the system relay's connector for contact resistance and oxidation.

Check the charging system's function for low voltage.

HINT: Read off the battery voltage using the VCT2000 (or appropriate scan tool).

  1. Continue Refer to «VERIFICATION»(ref-476782-S26804313652012060500000)

Note. If diagnostic trouble code for alternator is stored, then troubleshoot that diagnostic trouble code first.

Check the charging system's function for high voltage.

HINT: Read off the battery voltage using the VCT2000 (or appropriate scan tool).

  1. Continue Refer to «VERIFICATION»(ref-476782-S38612870802012060500000)

Note. If diagnostic trouble code for alternator is stored, then troubleshoot that diagnostic trouble code first.

Check the charging system's function for high voltage.

HINT: Read off the battery voltage using the VCT2000 (or appropriate scan tool).

  1. Continue Refer to «VERIFICATION»(ref-476782-S30412786472012060500000)

CHECKING THE COMPONENTS AND WIRING

  1. Ignition off. Check the cable between the Engine Control Module (ECM) #B54 (#C54) and battery for open circuit, contact resistance or oxidation. Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-476691-S27857399862012060500000) see «SIGNAL SPECIFICATION, ENGINE CONTROL MODULE (ECM)»(ref-476694-S30016655152012060500000) see «ENGINE CONTROL MODULE (ECM), REPLACING»(ref-476695-S24530329132012060500000) see «CHECKING WIRING AND TERMINALS»(ref-476689-S17655503092012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476782-S20679120022012060500000)
  1. Ignition off Disconnect the engine control module (ECM). Check the signal cables for start relay for open circuit to ground. Measure between: Control module #B11 (#C11) and start relay. Control module #B51 (#C51) and start relay. Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-476691-S27857399862012060500000) see «SIGNAL SPECIFICATION, ENGINE CONTROL MODULE (ECM)»(ref-476694-S30016655152012060500000) see «LOCATION OF COMPONENTS, ENGINE COMPARTMENT»(ref-476766-S16137402102012060500000) see «COMPONENT SPECIFICATIONS»(ref-476694-S25047767552012060500000) see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476782-S14562751032012060500000)
  1. Ignition off Disconnect the engine control module (ECM). Check the signal wiring for the starter relay. Check for an open-circuit. Check for a short-circuit to ground. Measure between: Engine control module (ECM) #B11 (#C11) and starter relay. Engine control module (ECM) #B51 (#C51) and starter relay. Check the supply cable from the starter relay to the starter motor. Check for an open-circuit. Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-476691-S30437390172012060500000) see «SIGNAL SPECIFICATION»(ref-476694-S14228516802012060500000) see «COMPONENT SPECIFICATIONS»(ref-476694-S39749312632012060500000) see «LOCATION OF COMPONENTS»(ref-476766-S34089063632012060500000) see «CHECKING WIRING AND TERMINALS»(ref-476689-S17655503092012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476782-S38665552672012060500000)
  1. Ignition off Disconnect the engine control module (ECM). Check the signal wiring for the starter relay. Check for a short-circuit to supply. Measure between: Control module terminal #B11 (#C11) and starter relay. Control module terminal #B51 (#C51) and starter relay. Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-476691-S30437390172012060500000) see «SIGNAL SPECIFICATION»(ref-476694-S14228516802012060500000) see «COMPONENT SPECIFICATIONS»(ref-476694-S39749312632012060500000) see «LOCATION OF COMPONENTS»(ref-476766-S34089063632012060500000) see «CHECKING WIRING AND TERMINALS»(ref-476689-S17655503092012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476782-S24608015032012060500000)
  1. Ignition off Disconnect the engine control module (ECM). Check the signal cables for start relay for open circuit to ground. Measure between: Control module #B11 (#C11) and start relay. Control module #B51 (#C51) and start relay. Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-476691-S30437390172012060500000) see «SIGNAL SPECIFICATION»(ref-476694-S14228516802012060500000) see «COMPONENT SPECIFICATIONS»(ref-476694-S39749312632012060500000) see «LOCATION OF COMPONENTS»(ref-476766-S34089063632012060500000) see «CHECKING WIRING AND TERMINALS»(ref-476689-S17655503092012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476782-S30943808952012060500000)
  1. Ignition off Disconnect the engine control module (ECM). Check the signal wiring for the starter relay. Check for an open-circuit. Check for a short-circuit to ground. Measure between: Engine control module (ECM) #B11 (#C11) and starter relay. Engine control module (ECM) #B51 (#C51) and starter relay. Check the supply cable from the starter relay to the starter motor. Check for an open-circuit. Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-476691-S27857399862012060500000) see «SIGNAL SPECIFICATION, ENGINE CONTROL MODULE (ECM)»(ref-476694-S30016655152012060500000) see «LOCATION OF COMPONENTS, ENGINE COMPARTMENT»(ref-476766-S16137402102012060500000) see «COMPONENT SPECIFICATIONS»(ref-476694-S25047767552012060500000) see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476782-S24360082862012060500000)
  1. Ignition off Disconnect the engine control module (ECM). Check the signal wiring for the starter relay. Check for a short-circuit to supply. Measure between: Control module terminal #B11 (#C11) and starter relay. Control module terminal #B51 (#C51) and starter relay. Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-476691-S27857399862012060500000) see «SIGNAL SPECIFICATION, ENGINE CONTROL MODULE (ECM)»(ref-476694-S30016655152012060500000) see «LOCATION OF COMPONENTS, ENGINE COMPARTMENT»(ref-476766-S16137402102012060500000) see «COMPONENT SPECIFICATIONS»(ref-476694-S25047767552012060500000) see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476782-S34037051002012060500000)
  1. Ignition off HINT: This diagnostic trouble code (DTC) can be stored if a battery charger with too high charge voltage has been connected. Check the generator (GEN) brushes (carbon). Check that the brushes can move in the regulator housing. The brushes are lightly sprung. Also check the slip rings. If the brushes and slip rings appear to be OK, try a new alternator control module (ACM) (charge regulator). Remedy as necessary. Other information see «GENERATOR (2007, 2008)»(ref-476783-S16442670652012060500000) see «CHARGE REGULATOR»(ref-476783-S23791265852012060500000) see «CHECKING WIRING AND TERMINALS»(ref-476689-S17655503092012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476782-S24119832892012060500000)
  1. Ignition off HINT: This diagnostic trouble code (DTC) can be stored if a battery charger with too high charge voltage has been connected. Check the generator (GEN) brushes (carbon). Check that the brushes can move in the regulator housing. The brushes are lightly sprung. Also check the slip rings. If the brushes and slip rings appear to be OK, try a new alternator control module (ACM) (charge regulator). Remedy as necessary. Other information see «ALTERNATOR AND REGULATOR - REMOVAL, REPLACEMENT AND INSTALLATION»(ref-476783) see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476782-S32285746592012060500000)
  1. Ignition off Make sure that the air intake and/or outlet of the alternator is not blocked. HINT: If the diagnostic trouble code recurs after operation, try a new alternator.
  1. Continue Refer to «VERIFICATION»(ref-476782-S02900039532012060500000)
  1. Ignition off Make sure that the air intake and/or outlet of the alternator is not blocked. HINT: If the diagnostic trouble code recurs after operation, try a new alternator.
  1. Continue Refer to «VERIFICATION»(ref-476782-S27581977772012060500000)

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