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Engine Control Module (ECM) Diagnostic Trouble Codes - 1 of 13: Wiring Volvo XC90 I

Testing & Diagnostics 8 illustrations ~3985 words

CHECKING COMPONENTS AND WIRING

Check the resistance of the outside temperature sensor.

Check the signal cable between control module terminal #B29 (#B39) and outside temperature sensor terminal #2. Check for a short-circuit to ground.

HINT: With the ignition on and the outside temperature sensor connector disconnected, the voltage between #2 and the ground terminal must be approximately 5V.

Remedy as necessary.

Other information

  1. To connect the breakout box / access the control module, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  2. For outside temperature sensor - 2006 see «OUTSIDE TEMPERATURE SENSOR DOOR MIRROR, REPLACING»(ref-494820-S21392095062012081600000)
  3. For outside temperature sensor 2007 - see «OUTSIDE TEMPERATURE SENSOR»(ref-494820-S33534835522012081600000)
  4. For resistance values, see «COMPONENT SPECIFICATIONS»(ref-476694-S25701556572012060500000)
  5. For 5 cylinder turbocharged engines -2004, see «SIGNAL DESCRIPTION»(ref-476694-S26303328522012060500000)
  6. For 5 cylinder turbocharged engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S29505181092012060500000) .
  7. For 6 cylinder engines -2004, see «SIGNAL SPECIFICATION»(ref-476694-S39196199822012060500000)
  8. For 6 cylinder engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S31890965202012060500000) .

Scheme 32

Scheme 32
Scheme 32

Scheme 33

Scheme 33
Scheme 33

Scheme 34

Scheme 34
Scheme 34
  1. Continue Refer to «VERIFICATION»(ref-476747-S11944850882012060500000)

Check the resistance of the outside temperature sensor.

Note. The outside temperature sensor may be defective if there was a short-circuit to supply voltage in the signal cable. Check this before replacing the sensor.

Check the signal cable between control module terminal #B29 (#B39) and outside temperature sensor terminal #2. Check for a short-circuit to supply voltage. Check for an open-circuit.

HINT: With the ignition on and the outside temperature sensor connector disconnected, the voltage between #2 and ground must be approximately 5 V.

Check the ground lead between control module terminal #B4 (#B14) and outside temperature sensor terminal #3. Check for an open-circuit.

Remedy as necessary.

Other information

  1. To connect the breakout box / access the control module, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  2. For outside temperature sensor - 2006 see «OUTSIDE TEMPERATURE SENSOR DOOR MIRROR, REPLACING»(ref-494820-S21392095062012081600000)
  3. For outside temperature sensor 2007 - see «OUTSIDE TEMPERATURE SENSOR»(ref-494820-S33534835522012081600000)
  4. For resistance values, see «COMPONENT SPECIFICATIONS»(ref-476694-S25701556572012060500000)
  5. For 5 cylinder turbocharged engines -2004, see «SIGNAL DESCRIPTION»(ref-476694-S26303328522012060500000)
  6. For 5 cylinder turbocharged engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S29505181092012060500000) .
  7. For 6 cylinder engines -2004, see «SIGNAL SPECIFICATION»(ref-476694-S39196199822012060500000)
  8. For 6 cylinder engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S31890965202012060500000) .

Scheme 35

Scheme 35
Scheme 35
  1. Continue Refer to «VERIFICATION»(ref-476747-S38256099582012060500000)

CHECKING THE WIRING AND COMPONENT

  1. Ignition off. Check the intake air temperature (IAT) sensor resistance between terminals #1 and #2 on the boost pressure sensor. NOTE: The intake air temperature (IAT) sensor may be defective if there gas been a short-circuit to supply voltage in the signal cable. Check this before replacing the sensor. Check the signal cable between control module terminal #A5 (#A5) and boost pressure sensor terminal #2. Check for a short-circuit to supply voltage. Check for an open-circuit. HINT: With the ignition on and the boost pressure sensor connector disconnected, the voltage between terminal #2 and ground must be approximately 5 V. Check the ground lead between control module terminal #A60 (#A60) and boost pressure sensor terminal #1. Check for an open-circuit. If no errors are found and the fault is permanent, replace the intake air temperature (IAT) sensor. Remedy as necessary. Other information: To connect the breakout box / access the control module, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000) For B5xx4T, see «TEMPERATURE AND PRESSURE SENSORS, REPLACING»(ref-476695-S35429283012012060500000) For B6xx4T, see «TEMPERATURE AND PRESSURE SENSORS, REPLACING»(ref-476695-S35429283012012060500000) For resistance values, see «COMPONENT SPECIFICATIONS»(ref-476694-S25701556572012060500000) For 5 cylinder turbocharged engines -2004, see «SIGNAL DESCRIPTION»(ref-476694-S26303328522012060500000) For 5 cylinder turbocharged engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S29505181092012060500000) . For 6 cylinder engines -2004, see «SIGNAL SPECIFICATION»(ref-476694-S39196199822012060500000) For 6 cylinder engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S31890965202012060500000) . see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000) .
  1. Continue Refer to «VERIFICATION»(ref-476747-S18247662152012060500000)

CHECKING THE WIRING

Check the cable between engine control module (ECM) terminal #A22 (#A22) and mass air flow (MAF) sensor terminal #5. Check for a short-circuit to supply voltage.

Check the ground lead between terminal #A58 (#A58) and mass air flow (MAF) sensor terminal #3. Check for an open-circuit.

With the ignition on and the mass air flow (MAF) sensor connector disconnected, the voltage at mass air flow (MAF) terminal #2 must be approximately U bat , at mass air flow (MAF) terminal #3 it must be ground and at terminal #5 approximately 1 V.

Remedy as necessary

Other information

  1. see «SHORT-CIRCUIT TO SUPPLY VOLTAGE. PERMANENT FAULTS»(ref-494744-S38605125602012081600000)
  2. see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  3. see «MASS AIR FLOW (MAF) SENSOR, REPLACING»(ref-476751-S11580805602012060500000)
  4. For 5 cylinder turbocharged engines -2004, see «SIGNAL DESCRIPTION»(ref-476694-S26303328522012060500000)
  5. For 5 cylinder turbocharged engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S29505181092012060500000) .
  6. For 6 cylinder engines -2004, see «SIGNAL SPECIFICATION»(ref-476694-S39196199822012060500000)
  7. For 6 cylinder engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S31890965202012060500000) .

Scheme 36

Scheme 36
Scheme 36
  1. Continue Refer to «VERIFICATION»(ref-476747-S10606468012012060500000)

Check the mass air flow (MAF) sensor connector. Check for contact resistance and oxidation.

Check for air leakage in the intake system and for damage to hoses etc.

Check the power supply cable between system relay terminal #5 and mass air flow (MAF) sensor terminal #2. Check for an open-circuit.

Check the signal cable between engine control module (ECM) terminal #A22 (#A22) and mass air flow (MAF) sensor terminal #5. Check for an open-circuit. Check for a short-circuit to ground.

Check the power supply cable between engine control module (ECM) terminal #A39 (#A39) and mass air flow (MAF) sensor terminal #4. Check for an open-circuit.

HINT: With the ignition on and the mass air flow (MAF) sensor connector connected the voltage at mass air flow (MAF) sensor terminal #2 must be approximately U bat.

Remedy as necessary.

Other information

  1. see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  2. see «CHECK FOR AIR LEAKS IN THE INTAKE SYSTEM»(ref-494823-S24990024732012081600000)
  3. see «MASS AIR FLOW (MAF) SENSOR, REPLACING»(ref-476751-S11580805602012060500000)
  4. For 5 cylinder turbocharged engines -2004, see «SIGNAL DESCRIPTION»(ref-476694-S26303328522012060500000)
  5. For 5 cylinder turbocharged engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S29505181092012060500000) .
  6. For 6 cylinder engines -2004, see «SIGNAL SPECIFICATION»(ref-476694-S39196199822012060500000)
  7. For 6 cylinder engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S31890965202012060500000) .
  8. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476747-S21168670552012060500000)
  1. Check the boost pressure sensor connector. Check for contact resistance and oxidation. Check the signal cable between engine control module (ECM) terminal #A23 (#A23) and boost pressure sensor terminal #4. Check for a short-circuit to supply voltage. Check for an open-circuit. Check the ground lead between control module terminal #A60 (#A60) and boost pressure sensor terminal #1. Check for an open-circuit. Remedy as necessary. Other information: see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000) For 5 cylinder turbocharged engines -2004, see «SIGNAL DESCRIPTION»(ref-476694-S26303328522012060500000) For 5 cylinder turbocharged engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S29505181092012060500000) . For 6 cylinder engines -2004, see «SIGNAL SPECIFICATION»(ref-476694-S39196199822012060500000) For 6 cylinder engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S31890965202012060500000) . For B5xx4T, see «TEMPERATURE AND PRESSURE SENSORS, REPLACING»(ref-476695-S35429283012012060500000) For B6xx4T, see «TEMPERATURE AND PRESSURE SENSORS, REPLACING»(ref-476695-S35429283012012060500000) see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476747-S16112400522012060500000)
  1. Check the boost pressure sensor connector. Check for contact resistance and oxidation. Check the signal cable between engine control module (ECM) terminal #A23 (#A23) and boost pressure sensor terminal #4. Check for a short-circuit to ground. Remedy as necessary. Other information: see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000) For 5 cylinder turbocharged engines -2004, see «SIGNAL DESCRIPTION»(ref-476694-S26303328522012060500000) For 5 cylinder turbocharged engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S29505181092012060500000) . For 6 cylinder engines -2004, see «SIGNAL SPECIFICATION»(ref-476694-S39196199822012060500000) For 6 cylinder engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S31890965202012060500000) . For B5xx4T, see «TEMPERATURE AND PRESSURE SENSORS, REPLACING»(ref-476695-S35429283012012060500000) For B6xx4T, see «TEMPERATURE AND PRESSURE SENSORS, REPLACING»(ref-476695-S35429283012012060500000) see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476747-S16807112052012060500000)
  1. Check the boost pressure sensor connector. Check for contact resistance and oxidation. HINT: The diagnostic trouble code (DTC) may be caused by a damaged boost pressure sensor. Remedy as necessary. Other information: For B5xx4T, see «TEMPERATURE AND PRESSURE SENSORS, REPLACING»(ref-476695-S35429283012012060500000) For B6xx4T, see «TEMPERATURE AND PRESSURE SENSORS, REPLACING»(ref-476695-S35429283012012060500000) see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476747-S16817092572012060500000)
  1. Check the boost pressure sensor connector. Check for contact resistance and oxidation. Check that the boost pressure sensor is correctly installed and that there is no air leakage. HINT: The diagnostic trouble code (DTC) may be caused by a damaged boost pressure sensor. Remedy as necessary. Other information: For B5xx4T, see «TEMPERATURE AND PRESSURE SENSORS, REPLACING»(ref-476695-S35429283012012060500000) For B6xx4T, see «TEMPERATURE AND PRESSURE SENSORS, REPLACING»(ref-476695-S35429283012012060500000) see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476747-S04069679362012060500000)

Check the mass air flow (MAF) sensor connector. Check for contact resistance and oxidation.

Check for air leakage in the intake system and for damage to hoses etc.

Check the inside of the throttle body (TB). Check for contamination. When the throttle body (TB) is contaminated, the air flow to the engine is impaired and diagnostic trouble code (DTCs) or fault symptoms can occur.

Clean the throttle body (TB) if needed.

Check the power supply cable between system relay terminal #5 and mass air flow (MAF) sensor terminal #2. Check for an open-circuit.

Check the signal cable between engine control module (ECM) terminal #A22 (#A22) and mass air flow (MAF) sensor terminal #5. Check for a short-circuit to ground.

Check the power supply cable between engine control module (ECM) terminal #A39 (#A39) and mass air flow (MAF) sensor terminal #4. Check for an open-circuit.

HINT: With the ignition on and the mass air flow (MAF) sensor connector connected the voltage at mass air flow (MAF) sensor terminal #2 must be approximately U bat.

Remedy as necessary.

Other information

  1. To connect the breakout box and access the control module, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  2. see «CHECKING FOR AIR LEAKAGE IN THE INTAKE SYSTEM»(ref-476753-S26099086702012060500000)
  3. For B5xx4T, see «THROTTLE BODY (TB), CLEANING»(ref-476750-S36382112932012060500000) .
  4. For B6xx4x, see «THROTTLE BODY (TB), CLEANING»(ref-476750-S05163330712012060500000) .
  5. see «MASS AIR FLOW (MAF) SENSOR, REPLACING»(ref-476751-S11580805602012060500000)
  6. For 5 cylinder turbocharged engines -2004, see «SIGNAL DESCRIPTION»(ref-476694-S26303328522012060500000)
  7. For 5 cylinder turbocharged engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S29505181092012060500000) .
  8. For 6 cylinder engines -2004, see «SIGNAL SPECIFICATION»(ref-476694-S39196199822012060500000)
  9. For 6 cylinder engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S31890965202012060500000) .
  10. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476747-S14229494042012060500000)

HINT: If a diagnostic trouble code (DTC) for the intake air temperature (IAT) sensor is also stored, this code must be fault-traced first.

Check the connector for the outside temperature sensor. Check for contact resistance and oxidation.

Check the resistance of the outside temperature sensor.

HINT: With the ignition on and the outside temperature sensor connector disconnected, the voltage between terminal #2 and ground must be approximately 5 V.

Remedy as necessary.

Other information

  1. see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  2. For 5 cylinder turbocharged engines -2004, see «SIGNAL DESCRIPTION»(ref-476694-S26303328522012060500000)
  3. For 5 cylinder turbocharged engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S29505181092012060500000) .
  4. For 6 cylinder engines -2004, see «SIGNAL SPECIFICATION»(ref-476694-S39196199822012060500000)
  5. For 6 cylinder engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S31890965202012060500000) .
  6. see «COMPONENT SPECIFICATIONS»(ref-476694-S25701556572012060500000)
  7. For outside temperature sensor - 2006 see «OUTSIDE TEMPERATURE SENSOR DOOR MIRROR, REPLACING»(ref-494820-S21392095062012081600000)
  8. For outside temperature sensor 2007 - see «OUTSIDE TEMPERATURE SENSOR»(ref-494820-S33534835522012081600000)
  1. Continue Refer to «VERIFICATION»(ref-476747-S39141512112012060500000)
  1. Ignition off. Check the signal cable between control module terminal #A23 (#A23) and boost pressure sensor terminal #4. Check for a short-circuit to supply voltage. Check for an open-circuit. HINT: With the ignition on and the boost pressure sensor connector disconnected, the voltage between terminal #4 and ground terminal should be approximately 5 V. Check the ground lead between control module terminal #A60 (#A60) and boost pressure sensor terminal #1. Check for an open-circuit. If no errors are found and the fault is permanent, replace the boost pressure sensor. Remedy as necessary. Other information: To connect the breakout box / access the control module, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000) For B5xx4T, see «TEMPERATURE AND PRESSURE SENSORS, REPLACING»(ref-476695-S35429283012012060500000) For B6xx4T, see «TEMPERATURE AND PRESSURE SENSORS, REPLACING»(ref-476695-S35429283012012060500000) For 5 cylinder turbocharged engines -2004, see «SIGNAL DESCRIPTION»(ref-476694-S26303328522012060500000) For 5 cylinder turbocharged engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S29505181092012060500000) . For 6 cylinder engines -2004, see «SIGNAL SPECIFICATION»(ref-476694-S39196199822012060500000) For 6 cylinder engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S31890965202012060500000) . see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000) .
  1. Continue Refer to «VERIFICATION»(ref-476747-S06641812582012060500000)
  1. Ignition off. Check the signal cable between control module terminal #A23 (#A23) and boost pressure sensor terminal #4. Check for a short-circuit to ground. HINT: With the ignition on and the boost pressure sensor connector disconnected, the voltage between terminal #4 and the ground terminal should be approximately 5 V. If no errors are found and the fault is permanent, replace the boost pressure sensor. Remedy as necessary. Other information: To connect the breakout box / access the control module, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000) For B5xx4T, see «TEMPERATURE AND PRESSURE SENSORS, REPLACING»(ref-476695-S35429283012012060500000) For B6xx4T, see «TEMPERATURE AND PRESSURE SENSORS, REPLACING»(ref-476695-S35429283012012060500000) For 5 cylinder turbocharged engines -2004, see «SIGNAL DESCRIPTION»(ref-476694-S26303328522012060500000) For 5 cylinder turbocharged engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S29505181092012060500000) . For 6 cylinder engines -2004, see «SIGNAL SPECIFICATION»(ref-476694-S39196199822012060500000) For 6 cylinder engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S31890965202012060500000) . see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000) .
  1. Continue Refer to «VERIFICATION»(ref-476747-S13064317462012060500000)
WARNINGBefore fault-tracing can begin, the engine cooling fan (FC) connector must be disconnected to prevent the engine cooling fan (FC) engaging. Diagnostic trouble code (DTC) ECM-6110 Engine cooling fan (FC) control module may be stored. After fault-tracing the connector must be reconnected.

Note. This diagnostic trouble code (DTC) is stored if the engine coolant temperature (ECT) sensor freezes. This may happen if the coolant level is low or there is too little glycol in the coolant. Check the engine coolant level and its freezing point. Remedy as necessary.

HINT: The diagnostic trouble code (DTC) can be caused by a thermostat that doesn't open.

Scheme 37

Scheme 37
Scheme 37
  1. Ignition off
  2. Check the ground lead between control module terminal #A60 (#A60) and engine coolant temperature (ECT) sensor terminal #2. Check for an open-circuit
  3. Reinstall the components, reconnect the connectors etc. Other information see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000) To connect the breakout box / access the control module, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000) For B5xx4T, see «REPLACING THE THERMOSTAT AND/OR ENGINE COOLANT TEMPERATURE SENSOR»(ref-476760-S13127344692012060500000) For B6xx4T, see «ENGINE COOLANT TEMPERATURE (ECT) SENSOR, REPLACING»(ref-476695-S19968063362012060500000) . For resistance values, see «COMPONENT SPECIFICATIONS»(ref-476694-S25701556572012060500000) For 5 cylinder turbocharged engines -2004, see «SIGNAL DESCRIPTION»(ref-476694-S26303328522012060500000) For 5 cylinder turbocharged engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S29505181092012060500000) .

Were any faults found in the cable?

  1. YES Refer to «VERIFICATION»(ref-476747-S00792864022012060500000)
  2. NO Refer to «CHECKING THE ENGINE COOLANT TEMPERATURE (ECT)»(ref-476747-S28326116082012060500000)

CHECKING WIRING AND CONNECTORS

WARNINGBefore fault-tracing can begin, the engine cooling fan (FC) connector must be disconnected to prevent the engine cooling fan (FC) engaging. Diagnostic trouble code (DTC) ECM-6110 Engine cooling fan (FC) control module may be stored. After fault-tracing the connector must be reconnected.

Note. This diagnostic trouble code (DTC) is stored if the engine coolant temperature (ECT) sensor freezes. This may happen if the coolant level is low or there is too little glycol in the coolant. Check the engine coolant level and its freezing point. Remedy as necessary.

Check the connector on the engine coolant temperature (ECT) sensor. Check for contact resistance and oxidation. Check for loose connections.

Check the ground lead between control module terminal #A60 (#A60) and engine coolant temperature (ECT) sensor terminal #2. Check for an intermittent open-circuit.

HINT: The fault may have been caused by air pockets in the cooling system.

Other information

  1. To connect the breakout box / access the control module, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  2. For B5xx4T, see «REPLACING THE THERMOSTAT AND/OR ENGINE COOLANT TEMPERATURE SENSOR»(ref-476760-S13127344692012060500000)
  3. For B6xx4T, see «ENGINE COOLANT TEMPERATURE (ECT) SENSOR, REPLACING»(ref-476695-S19968063362012060500000) .
  4. For resistance values, see «COMPONENT SPECIFICATIONS»(ref-476694-S25701556572012060500000)
  5. For 6 cylinder engines -2004, see «SIGNAL SPECIFICATION»(ref-476694-S39196199822012060500000)
  6. For 6 cylinder engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S31890965202012060500000) .
  7. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000) .

Scheme 38

Scheme 38
Scheme 38
  1. Continue Refer to «INFORMATION»(ref-476747-S06655010232012060500000)
WARNINGBefore fault-tracing can begin, the engine cooling fan (FC) connector must be disconnected to prevent the engine cooling fan (FC) engaging. Diagnostic trouble code (DTC) ECM-6120 Engine cooling fan (FC) control module may be stored. After fault-tracing the connector must be reconnected.

Note. This diagnostic trouble code (DTC) is stored if the engine coolant temperature (ECT) sensor freezes. This may happen if the coolant level is low or there is too little glycol in the coolant. Check the engine coolant level and its freezing point. Remedy as necessary.

  1. Ignition off
  2. Check the ground lead between control module terminal #A60 (#A60) and engine coolant temperature (ECT) sensor terminal #2. Check for an open-circuit
  3. Reinstall the components, reconnect the connectors etc. Other information To connect the breakout box / access the control module, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000) For B5xx4T, see «REPLACING THE THERMOSTAT AND/OR ENGINE COOLANT TEMPERATURE SENSOR»(ref-476760-S13127344692012060500000) For B6xx4T, see «ENGINE COOLANT TEMPERATURE (ECT) SENSOR, REPLACING»(ref-476695-S19968063362012060500000) . For resistance values, see «COMPONENT SPECIFICATIONS»(ref-476694-S25701556572012060500000) For 6 cylinder engines -2004, see «SIGNAL SPECIFICATION»(ref-476694-S39196199822012060500000) For 6 cylinder engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S31890965202012060500000) . see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000) .

Were any faults found in the ground cable?

  1. YES Refer to «VERIFICATION»(ref-476747-S12977322842012060500000)
  2. NO Refer to «CHECKING THE ENGINE COOLANT TEMPERATURE (ECT)»(ref-476747-S32074686322012060500000)
WARNINGBefore fault-tracing can begin, the engine cooling fan (FC) connector must be disconnected to prevent the engine cooling fan (FC) engaging. Diagnostic trouble code (DTC) ECM-6110 Engine cooling fan (FC) low-speed signal may be stored. After fault-tracing the connector must be reconnected.
  1. Ignition off. Check the resistance of the engine coolant temperature (ECT) sensor between terminals #1 and #2 (component side). Check the signal cable between control module terminal #A4 (#A4) and engine coolant temperature (ECT) sensor terminal #1. Check for a short-circuit to ground. If no faults are found and the fault is permanent, replace the engine coolant temperature (ECT) sensor. Remedy as necessary. Other information: To connect the breakout box / access the control module, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000) For B5xx4T, see «REPLACING THE THERMOSTAT AND/OR ENGINE COOLANT TEMPERATURE SENSOR»(ref-476760-S13127344692012060500000) For B6xx4T, see «ENGINE COOLANT TEMPERATURE (ECT) SENSOR, REPLACING»(ref-476695-S19968063362012060500000) . For resistance values, see «COMPONENT SPECIFICATIONS»(ref-476694-S25701556572012060500000) For 5 cylinder turbocharged engines -2004, see «SIGNAL DESCRIPTION»(ref-476694-S26303328522012060500000) For 5 cylinder turbocharged engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S29505181092012060500000) . see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000) .
  1. Continue Refer to «VERIFICATION»(ref-476747-S24493737422012060500000)
WARNINGBefore fault-tracing can begin, the engine cooling fan (FC) connector must be disconnected to prevent the engine cooling fan (FC) engaging. Diagnostic trouble code (DTC) ECM-6120 Engine cooling fan (FC) control module may be stored. After fault-tracing the connector must be reconnected.

Check the signal cable between control module terminal #A4 (#A4) and engine coolant temperature (ECT) sensor terminal #1. Check for an intermittent short-circuit to ground.

Other information

  1. To connect the breakout box / access the control module, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  2. For B5xx4T, see «REPLACING THE THERMOSTAT AND/OR ENGINE COOLANT TEMPERATURE SENSOR»(ref-476760-S13127344692012060500000)
  3. For B6xx4T, see «ENGINE COOLANT TEMPERATURE (ECT) SENSOR, REPLACING»(ref-476695-S19968063362012060500000) .
  4. For resistance values, see «COMPONENT SPECIFICATIONS»(ref-476694-S25701556572012060500000)
  5. For 6 cylinder engines -2004, see «SIGNAL SPECIFICATION»(ref-476694-S39196199822012060500000)
  6. For 6 cylinder engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S31890965202012060500000) .
  7. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000) .
  1. Continue Refer to «INFORMATION»(ref-476747-S15690777892012060500000)
WARNINGBefore fault-tracing can begin, the engine cooling fan (FC) connector must be disconnected to prevent the engine cooling fan (FC) engaging. Diagnostic trouble code (DTC) ECM-6120 Engine cooling fan (FC) control module may be stored. After fault-tracing the connector must be reconnected.

Check the resistance of the engine coolant temperature (ECT) sensor.

Check the signal cable between control module terminal #A4 (#A4) and engine coolant temperature (ECT) sensor terminal #1. Check for a short-circuit to ground.

Remedy as necessary.

Other information

  1. To connect the breakout box / access the control module, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  2. For B5xx4T, see «REPLACING THE THERMOSTAT AND/OR ENGINE COOLANT TEMPERATURE SENSOR»(ref-476760-S13127344692012060500000)
  3. For B6xx4T, see «ENGINE COOLANT TEMPERATURE (ECT) SENSOR, REPLACING»(ref-476695-S19968063362012060500000) .
  4. For resistance values, see «COMPONENT SPECIFICATIONS»(ref-476694-S25701556572012060500000)
  5. For 6 cylinder engines -2004, see «SIGNAL SPECIFICATION»(ref-476694-S39196199822012060500000)
  6. For 6 cylinder engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S31890965202012060500000) .
  7. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000) .
  1. Continue Refer to «VERIFICATION»(ref-476747-S18673927462012060500000)
  1. Ignition off. Check the resistance of the engine coolant temperature (ECT) sensor between terminals #1 and #2 (component side). NOTE: The engine coolant temperature (ECT) sensor may be defective as a result of the signal cable having been short-circuited to supply voltage. Check this before replacing the sensor. Check the signal cable between control module terminal #A4 (#A4) and engine coolant temperature (ECT) sensor terminal #1. Check for an open-circuit. Check for a short-circuit to supply voltage. HINT: With the ignition on and engine coolant temperature (ECT) sensor connector disconnected the voltage between terminal #1 and ground terminal should be approximately 5 V. Check the ground lead between control module terminal #A60 (#A60) and engine coolant temperature (ECT) sensor terminal #2. Check for an open-circuit. If no faults are found and the fault is permanent, replace the engine coolant temperature (ECT) sensor. Remedy as necessary. Other information To connect the breakout box / access the control module, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000) For B5xx4T, see «REPLACING THE THERMOSTAT AND/OR ENGINE COOLANT TEMPERATURE SENSOR»(ref-476760-S13127344692012060500000) For B6xx4T, see «ENGINE COOLANT TEMPERATURE (ECT) SENSOR, REPLACING»(ref-476695-S19968063362012060500000) . For resistance values, see «COMPONENT SPECIFICATIONS»(ref-476694-S25701556572012060500000) For 5 cylinder turbocharged engines -2004, see «SIGNAL DESCRIPTION»(ref-476694-S26303328522012060500000) For 5 cylinder turbocharged engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S29505181092012060500000) . see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000) .
  1. Continue Refer to «VERIFICATION»(ref-476747-S29821474622012060500000)
WARNINGBefore fault-tracing can begin, the engine cooling fan (FC) connector must be disconnected to prevent the engine cooling fan (FC) engaging. Diagnostic trouble code (DTC) ECM-6120 Engine cooling fan (FC) control module may be stored. After fault-tracing the connector must be reconnected.

Check the signal cable between control module terminal #A4 (#A4) and engine coolant temperature (ECT) sensor terminal #1. Check for an intermittent open-circuit. Check for an intermittent short-circuit to supply voltage.

HINT: With the ignition on and engine coolant temperature (ECT) sensor connector disconnected the voltage between terminal #1 and ground terminal should be approximately 5 V.

Check the ground lead between control module terminal #A60 (#A60) and engine coolant temperature (ECT) sensor terminal #2. Check for an intermittent open-circuit.

Other information

  1. To connect the breakout box / access the control module, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  2. For B5xx4T, see «REPLACING THE THERMOSTAT AND/OR ENGINE COOLANT TEMPERATURE SENSOR»(ref-476760-S13127344692012060500000)
  3. For B6xx4T, see «ENGINE COOLANT TEMPERATURE (ECT) SENSOR, REPLACING»(ref-476695-S19968063362012060500000) .
  4. For the resistance values, see «COMPONENT SPECIFICATIONS»(ref-476694-S25701556572012060500000)
  5. For 6 cylinder engines -2004, see «SIGNAL SPECIFICATION»(ref-476694-S39196199822012060500000)
  6. For 6 cylinder engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S31890965202012060500000) .
  7. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000) .
  1. Continue Refer to «INFORMATION»(ref-476747-S33670544132012060500000)

Check the resistance of the engine coolant temperature (ECT) sensor.

Note. The engine coolant temperature (ECT) sensor may be defective as a result of the signal cable having been short-circuited to supply voltage. Check this before replacing the sensor.

Check the signal cable between control module terminal #A4 (#A4) and engine coolant temperature (ECT) sensor terminal #1. Check for an open-circuit. Check for a short-circuit to supply voltage.

HINT: With the ignition on and engine coolant temperature (ECT) sensor connector disconnected the voltage between terminal #1 and ground terminal must be approximately 5 V.

Check the ground lead between control module terminal #A60 (#A60) and engine coolant temperature (ECT) sensor terminal #2. Check for an open-circuit.

Remedy as necessary.

Other information

  1. To connect the breakout box / access the control module, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  2. For B5xx4T, see «REPLACING THE THERMOSTAT AND/OR ENGINE COOLANT TEMPERATURE SENSOR»(ref-476760-S13127344692012060500000)
  3. For B6xx4T, see «ENGINE COOLANT TEMPERATURE (ECT) SENSOR, REPLACING»(ref-476695-S19968063362012060500000) .
  4. For resistance values, see «COMPONENT SPECIFICATIONS»(ref-476694-S25701556572012060500000)
  5. For 6 cylinder engines -2004, see «SIGNAL SPECIFICATION»(ref-476694-S39196199822012060500000)
  6. For 6 cylinder engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S31890965202012060500000) .
  7. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000) .
  1. Continue Refer to «VERIFICATION»(ref-476747-S15958332872012060500000)

Check the cable that relates to the diagnostic trouble code (DTC). Check for an open-circuit.

Check between

  1. Engine control module (ECM) terminal #A16 (#A16) and injector terminal #2 (ECM-200B, injector 1)
  2. Engine control module (ECM) terminal #A34 (#A34) and injector terminal #2 (ECM-201B, injector 2)
  3. Engine control module (ECM) terminal #A15 (#A15) and injector terminal #2 (ECM-202B, injector 3)
  4. Engine control module (ECM) terminal #A33 (#A33) and injector terminal #2 (ECM-203B, injector 4)
  5. Engine control module (ECM) terminal #A14 (#A14) and injector terminal #2 (ECM-204B, injector 5).

Remedy as necessary.

Other information

  1. see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  2. For 5 cylinder turbocharged engines -2004, see «SIGNAL DESCRIPTION»(ref-476694-S26303328522012060500000)
  3. For 5 cylinder turbocharged engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S29505181092012060500000) .
  4. For B5xx4T, see «INJECTOR/PULSE DAMPER, REPLACEMENT»(ref-476751-S12739566552012060500000)
  5. For B6xx4T, see «INJECTOR / PULSATION DAMPER, REPLACING»(ref-476751-S42918859582012060500000) .
  6. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)

Scheme 39

Scheme 39
Scheme 39
  1. Continue Refer to «VERIFICATION»(ref-476747-S29208948772012060500000)

Check the cable that relates to the diagnostic trouble code (DTC). Check for a short-circuit to supply voltage.

Check between

  1. Engine control module (ECM) terminal #A16 (#A16) and injector terminal #2 (ECM-200C, injector 1)
  2. Engine control module (ECM) terminal #A34 (#A34) and injector terminal #2 (ECM-201C, injector 2)
  3. Engine control module (ECM) terminal #A15 (#A15) and injector terminal #2 (ECM-202C, injector 3)
  4. Engine control module (ECM) terminal #A33 (#A33) and injector terminal #2 (ECM-203C, injector 4)
  5. Engine control module (ECM) terminal #A14 (#A14) and injector terminal #2 (ECM-204C, injector 5).

Remedy as necessary.

Other information

  1. see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  2. For 5 cylinder turbocharged engines -2004, see «SIGNAL DESCRIPTION»(ref-476694-S26303328522012060500000)
  3. For 5 cylinder turbocharged engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S29505181092012060500000) .
  4. For B5xx4T, see «INJECTOR/PULSE DAMPER, REPLACEMENT»(ref-476751-S12739566552012060500000)
  5. For B6xx4T, see «INJECTOR / PULSATION DAMPER, REPLACING»(ref-476751-S42918859582012060500000) .
  6. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476747-S09580080172012060500000)

Check the cable that relates to the diagnostic trouble code (DTC). Check for a short-circuit to ground.

Check between

  1. Engine control module (ECM) terminal #A16 (#A16) and injector terminal #2 (ECM-200D, injector 1)
  2. Engine control module (ECM) terminal #A34 (#A34) and injector terminal #2 (ECM-201D, injector 2)
  3. Engine control module (ECM) terminal #A15 (#A15) and injector terminal #2 (ECM-202D, injector 3)
  4. Engine control module (ECM) terminal #A33 (#A33) and injector terminal #2 (ECM-203D, injector 4)
  5. Engine control module (ECM) terminal #A14 (#A14) and injector terminal #2 (ECM-204D, injector 5).

Remedy as necessary.

Other information

  1. see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  2. For 5 cylinder turbocharged engines -2004, see «SIGNAL DESCRIPTION»(ref-476694-S26303328522012060500000)
  3. For 5 cylinder turbocharged engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S29505181092012060500000) .
  4. For B5xx4T, see «INJECTOR/PULSE DAMPER, REPLACEMENT»(ref-476751-S12739566552012060500000)
  5. For B6xx4T, see «INJECTOR / PULSATION DAMPER, REPLACING»(ref-476751-S42918859582012060500000) .
  6. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476747-S24450177742012060500000)

CHECKING THE COMPONENTS AND WIRING

CAUTIONDo not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.

Check the exhaust system for air leakage.

If no fault is discovered, try using a new rear heated oxygen sensor (HO2S), as a damaged rear heated oxygen sensor (HO2S) can cause a diagnostic trouble code (DTC) to be stored.

Remedy as necessary

Other information

  1. see «CHECKING FOR AIR LEAKAGE IN THE EXHAUST SYSTEM»(ref-494824-S07275287112012081600000)
  2. see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S23777230272012060500000)
  3. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476747-S18760744702012060500000)

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