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Engine Control Module (ECM) Diagnostic Trouble Codes - 3 of 13: Wiring Volvo XC90 I

Testing & Diagnostics 12 illustrations ~6729 words

CHECKING THE WIRING

WARNINGBefore fault-tracing can begin, the engine cooling fan (FC) connector must be disconnected to prevent the engine cooling fan (FC) engaging. A diagnostic trouble code (DTC) for the 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.

Scheme 108

Scheme 108
Scheme 108

Scheme 109

Scheme 109
Scheme 109
  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) 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) . 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) .

Were any faults found in the ground cable?

  1. YES Refer to «VERIFICATION»(ref-476757-S32560532662012060500000)
  2. NO Refer to «CHECKING ENGINE COOLANT TEMPERATURE (ECT)»(ref-476757-S08451748712012060500000)

Scheme 110

Scheme 110: CHECKING ENGINE COOLANT TEMPERATURE (ECT)
Scheme 110: CHECKING ENGINE COOLANT TEMPERATURE (ECT)
  1. Fault-tracing must begin with the engine cold (+20°C) so that the engine coolant temperature (ECT) sensor can be tested over as wide a temperature range as possible
  2. Switch off the climate control system
  3. Start the engine. Read off the engine coolant temperature (ECT). Check that the engine coolant temperature (ECT) is within its permitted range and corresponds with the engine warming up.

Is the temperature within its permitted range?

  1. YES Refer to «CHECKING THERMOSTAT»(ref-476757-S28646374702012060500000)
  2. NO Refer to «REPLACING THE COMPONENT»(ref-476757-S13850589012012060500000)
WARNINGBefore fault-tracing can begin, the engine cooling fan (FC) connector must be disconnected to prevent the engine cooling fan (FC) engaging. A diagnostic trouble code (DTC) for the 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 see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000) 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) . 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) .

Were any faults found in the ground cable?

  1. YES Refer to «VERIFICATION»(ref-476757-S20896610592012060500000)
  2. NO Refer to «CHECKING ENGINE COOLANT TEMPERATURE (ECT)»(ref-476757-S18696042702012060500000)

CHECKING THE WIRING AND COMPONENT

WARNINGBefore fault-tracing can begin, the engine cooling fan (FC) connector must be disconnected to prevent the engine cooling fan (FC) engaging. A diagnostic trouble code (DTC) for engine cooling fan (FC) low-speed may be stored. After fault-tracing the connector must be reconnected.

Scheme 111

Scheme 111
Scheme 111

Scheme 112

Scheme 112
Scheme 112
  1. Ignition off. Check the resistance of the engine coolant temperature (ECT) sensor. Take readings between terminals #1 and #2 on the component. Check the signal cable between engine control module (ECM) 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 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 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) . see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476757-S05138641942012060500000)

CHECKING THE COMPONENT AND WIRING

WARNINGThe engine cooling fan (FC) can also operate if the ignition is switched off when this diagnostic trouble code (DTC) is stored.

HINT: To avoid injury, disconnect the power supply to the engine cooling fan (FC) during fault-tracing.

Check the resistance of the engine coolant temperature (ECT) sensor. Take readings between terminals #1 and #2 on the engine coolant temperature (ECT) sensor.

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

Take readings between

  1. Engine Control Module (ECM) #A42 (#A42) and engine temperature sensor #1.

Remedy as necessary.

Other information

  1. see «CONNECTING THE BREAKOUT BOX»(ref-476691-S18137629642012060500000)
  2. see «SIGNAL SPECIFICATION»(ref-476694-S29505181092012060500000) (Engine Control Module (ECM))
  3. see «SIGNAL SPECIFICATION»(ref-476694-S08117673082012060500000) (Engine Management System)
  4. see «THERMOSTAT / TEMPERATURE SENSOR, ENGINE COOLANT, REPLACING»(ref-476760-S39837981432012060500000)
  5. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17655503092012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476757-S01480335422012060500000)
WARNINGBefore fault-tracing can begin, the engine cooling fan (FC) connector must be disconnected to prevent the engine cooling fan (FC) engaging. A diagnostic trouble code (DTC) for engine cooling fan (FC) low-speed may be stored. After fault-tracing the connector must be reconnected.
  1. Ignition off. Check the resistance of the engine coolant temperature (ECT) sensor. Take readings between terminals #1 and #2 on the component. Check the signal cable between engine control module (ECM) 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 see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000) For 6 cylinder engines -2004, see «SIGNAL SPECIFICATION»(ref-476694-S39196199822012060500000) For 6 cylinder engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S31890965202012060500000) . see «COMPONENT SPECIFICATIONS»(ref-476694-S25701556572012060500000) 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) . see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476757-S34051392112012060500000)
  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 damaged if there has been a short-circuit to supply voltage in the signal cable. Check this before replacing the sensor. Check the signal cable between engine control module (ECM) 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 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) . see «COMPONENT SPECIFICATIONS»(ref-476694-S25701556572012060500000) 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) . see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476757-S10487935392012060500000)
  1. Ignition off. Check the resistance of the engine coolant temperature (ECT) sensor. Take readings between terminals #1 and #2 on the component. NOTE: The engine coolant temperature (ECT) sensor may be damaged if there has been a short-circuit to supply voltage in the signal cable. Check this before replacing the sensor. Check the signal cable between engine control module (ECM) 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 see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000) For 6 cylinder engines -2004, see «SIGNAL SPECIFICATION»(ref-476694-S39196199822012060500000) For 6 cylinder engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S31890965202012060500000) . see «COMPONENT SPECIFICATIONS»(ref-476694-S25701556572012060500000) 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) . see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476757-S19374127282012060500000)

CHECKING COMPONENTS AND WIRING

Check the signal cable between control module terminal #A2 (#A2) and fuel pressure sensor terminal #4. Check for a short-circuit to ground.

Remedy as necessary.

Try a new fuel pressure sensor if no fault is found during the above fault-tracing.

Other information

  1. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  2. For resistance values, see «COMPONENT SPECIFICATIONS»(ref-476694-S25701556572012060500000)
  3. To connect the breakout box, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  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. To access or replace the fuel pressure sensor, see «FUEL PRESSURE SENSOR, REPLACEMENT»(ref-476695-S32874135222012060500000) .

Scheme 113

Scheme 113
Scheme 113
  1. Continue Refer to «VERIFICATION»(ref-476757-S35488610002012060500000)

CHECKING CONNECTORS AND WIRING

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

Check the heated oxygen sensor (HO2S) connector. Check for contact resistance and oxidation. Check for loose connections.

Check the signal cable (+) between heated oxygen sensor (HO2S) terminal #1 and control module terminal #A41 (#A41). Check the signal cable (-) between heated oxygen sensor (HO2S) terminal #5 and the control module terminal #A42 (#A42). Check the cable for calibration current between heated oxygen sensor (HO2S) terminal #2 and control module terminal #A28 (#A28). Check the cable for pump current between heated oxygen sensor (HO2S) terminal #6 and control module terminal #A24 (#A24). Check for an intermittent short-circuit to supply voltage.

Check the signal cable (+) between heated oxygen sensor (HO2S) terminal #1 and control module terminal #A41 (#A41). Check the signal cable (-) between heated oxygen sensor (HO2S) terminal #5 and control module terminal #A42 (#A42). Check the cable for calibration current between heated oxygen sensor (HO2S) terminal #2 and the control module terminal #A28 (#A28). Check the cable for pump current between heated oxygen sensor (HO2S) terminal #6 and control module terminal #A24 (#A24). Check for an intermittent short-circuit to ground.

Check the signal cable (+) between heated oxygen sensor (HO2S) terminal #1 and control module terminal #A41 (#A41). 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 «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S23777230272012060500000)
  3. For B6xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S05984728352012060500000) .
  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) .

Scheme 114

Scheme 114
Scheme 114

Scheme 115

Scheme 115
Scheme 115
  1. Continue Refer to «INFORMATION»(ref-476757-S25052674462012060500000)

CHECKING CONNECTOR, WIRING AND COMPONENTS

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

Check the heated oxygen sensor (HO2S) connector. Check for contact resistance and oxidation.

Check the signal cable (+) between the heated oxygen sensor (HO2S) terminal #1 and control module terminal #A41 (#A41). Check the signal cable (-) between heated oxygen sensor (HO2S) terminal #5 and the control module terminal #A42 (#A42). Check the cable for calibration current between heated oxygen sensor (HO2S) terminal #2 and control module terminal #A28 (#A28). Check the cable for pump current between heated oxygen sensor (HO2S) terminal #6 and control module terminal #A24 (#A24). Check these cables for a short-circuit to supply voltage and a short-circuit to ground.

Check the signal cable (+) between heated oxygen sensor (HO2S) terminal #1 and control module terminal #A41 (#A41). Check for an open-circuit.

If the connector and cables are OK try a new heated oxygen sensor (HO2S).

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 «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S23777230272012060500000)
  3. For B6xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S05984728352012060500000) .
  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-476757-S24816340902012060500000)
CAUTIONDo not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.

Check the signal cable (+) between heated oxygen sensor (HO2S) terminal #1 and control module terminal #A41 (#A41). Check the signal cable (-) between heated oxygen sensor (HO2S) terminal #5 and control module terminal #A42 (#A42). Check for a short-circuit to each other.

Check the power supply to heated oxygen sensor (HO2S) terminal #3 and the signal cable between heated oxygen sensor (HO2S) terminal #4 and control module terminal #A18 (#A18). Check for an intermittent short-circuit to the other wiring for the heated oxygen sensor (HO2S).

Other information

  1. To connect the breakout box / access the control module, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  2. For B5xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S23777230272012060500000)
  3. For B6xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S05984728352012060500000) .
  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 «INFORMATION»(ref-476757-S22035597622012060500000)
CAUTIONDo not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.

Check the signal cable (+) between heated oxygen sensor (HO2S) terminal #1 and control module terminal #A41 (#A41). Check the signal cable (-) between heated oxygen sensor (HO2S) terminal #5 and control module terminal #A42 (#A42). Check for a short-circuit to each other.

Check the power supply to heated oxygen sensor (HO2S) terminal #3 and the signal cable between heated oxygen sensor (HO2S) terminal #4 and control module terminal #A18 (#A18). Check for a short-circuit to the other cables for the heated oxygen sensor (HO2S).

Try a new heated oxygen sensor (HO2S) if the wiring is OK.

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 «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S23777230272012060500000)
  3. For B6xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S05984728352012060500000) .
  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-476757-S00704286892012060500000)
CAUTIONDo not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.

Front heated oxygen sensor (HO2S), bank 1

Check the signal cable (+) between heated oxygen sensor (HO2S) terminal #1 and control module terminal #A41 (#A41). Check the cable for pump current between heated oxygen sensor (HO2S) terminal #6 and control module terminal #A24 (#A24). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.

Front heated oxygen sensor (HO2S), bank 2

Check the signal cable (+) between heated oxygen sensor (HO2S) terminal #1 and control module terminal #A43 (#A43). Check the cable for pump current between heated oxygen sensor (HO2S) terminal #6 and control module terminal #A25 (#A25). Check for an open-circuit, short-circuit to ground and a short-circuit to supply voltage.

Replace both heated oxygen sensors (HO2S) if the wiring is OK and no faults are found.

Remedy as necessary.

HINT: If the fault remains after fault-tracing/remedying, the fault may be in the circuit for the rear heated oxygen sensor (HO2S).

Other information

  1. To connect the breakout box / access the control module, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  2. For B5xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S23777230272012060500000)
  3. For B6xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S05984728352012060500000) .
  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 «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000) .
  1. Continue Refer to «VERIFICATION»(ref-476757-S19335216562012060500000)
CAUTIONDo not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.

HINT: The fault may be caused by a fault in the circuit for the rear heated oxygen sensor (HO2S).

Check the rear heated oxygen sensor (HO2S) connector. Check for contact resistance and oxidation.

Check the signal cable (+) between heated oxygen sensor (HO2S) terminal #4 and control module terminal #A61 (#B1). Check the signal cable (-) between heated oxygen sensor (HO2S) terminal #3 and control module terminal #A62 (#B2). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.

Replace the rear heated oxygen sensor (HO2S) if the wiring is OK.

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 «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S23777230272012060500000)
  3. For B6xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S05984728352012060500000) .
  4. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000) .

Scheme 116

Scheme 116
Scheme 116

Scheme 117

Scheme 117
Scheme 117

Scheme 118

Scheme 118
Scheme 118
  1. Continue Refer to «VERIFICATION»(ref-476757-S10073196832012060500000)
CAUTIONDo not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.

Check signal cable (+) between heated oxygen sensor (HO2S) terminal #1 and control module terminal #A41 (#A41). Check the cable for pump current between heated oxygen sensor (HO2S) terminal #6 and control module terminal #A24 (#A24). Check for a short-circuit to supply voltage.

Check signal cable (+) between heated oxygen sensor (HO2S) terminal #1 and control module terminal #A41 (#A41). Check the cable for pump current between heated oxygen sensor (HO2S) terminal #6 and control module terminal #A24 (#A24). Check for a short-circuit to ground.

Try a new heated oxygen sensor (HO2S) if the wiring is OK.

Remedy as necessary.

HINT: If the fault remains after fault-tracing, it may indicate that the fault is in the circuit for the rear heated oxygen sensor (HO2S).

Other information

  1. To connect the breakout box / access the control module, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  2. For B5xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S23777230272012060500000)
  3. For B6xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S05984728352012060500000) .
  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-476757-S22839220432012060500000)
CAUTIONDo not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.

HINT: The fault may be caused by a fault in the circuit for the rear heated oxygen sensor (HO2S).

Check the rear heated oxygen sensor (HO2S) connector. Check for contact resistance and oxidation.

Check the signal cable (+) between heated oxygen sensor (HO2S) terminal #4 and control module terminal #A61 (#B1). Check the signal cable (-) between heated oxygen sensor (HO2S) terminal #3 and control module terminal #A62 (#B2). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.

Try a new heated oxygen sensor (HO2S) if the wiring is OK.

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 «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S23777230272012060500000)
  3. For B6xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S05984728352012060500000) .
  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-476757-S27217869292012060500000)
CAUTIONDo not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.

Check the heated oxygen sensor (HO2S) connector. Check for contact resistance and oxidation. Check for loose connections.

Check the signal cable (-) between heated oxygen sensor (HO2S) terminal #5 and control module terminal #A42 (#A42). Check the cable for calibration current between heated oxygen sensor (HO2S) terminal #2 and control module terminal #A28 (#A28). Check for an intermittent open-circuit.

Check the cable for calibration current between heated oxygen sensor (HO2S) terminal #2 and control module terminal #A28 (#A28). Check the cable for pump current between heated oxygen sensor (HO2S) terminal #6 and control module terminal #A24 (#A24). Check for an intermittent short-circuit to each other.

Other information

  1. To connect the breakout box / access the control module, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  2. For B5xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S23777230272012060500000)
  3. For B6xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S05984728352012060500000) .
  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 «INFORMATION»(ref-476757-S24160083272012060500000)
CAUTIONDo not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.

Check the heated oxygen sensor (HO2S) connector. Check for contact resistance and oxidation.

Check the signal cable (-) between heated oxygen sensor (HO2S) terminal #5 and control module terminal #A42 (#A42). Check the cable for calibration current between heated oxygen sensor (HO2S) terminal #2 and control module terminal #A28 (#A28). Check for an open-circuit.

Check the cable for calibration current between heated oxygen sensor (HO2S) terminal #2 and control module terminal #A28 (#A28). Check the cable for the pump current between heated oxygen sensor (HO2S) terminal #6 and control module terminal #A24 (#A24). Check for a short-circuit to each other.

If the connector and cables are OK try a new heated oxygen sensor (HO2S).

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 «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S23777230272012060500000)
  3. For B6xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S05984728352012060500000) .
  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-476757-S11614993542012060500000)

Check the fuel pressure sensor connectors. Check for contact resistance and oxidation.

Check the signal cable between engine control module (ECM) terminal #A2 (#A2) and fuel 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 fuel pressure sensor terminal #1. Check for an open-circuit.

Remedy as necessary.

Try a new fuel pressure sensor if no fault is found during the above fault-tracing.

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. For resistance values: «COMPONENT SPECIFICATIONS»(ref-476694-S25701556572012060500000)
  7. see «FUEL PRESSURE SENSOR, REPLACEMENT»(ref-476695-S32874135222012060500000)
  8. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476757-S40916207022012060500000)

Check the fuel pressure sensor connectors. Check for contact resistance and oxidation.

Check the signal cable between engine control module (ECM) terminal #A2 (#A2) and fuel 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 fuel pressure sensor terminal #1. Check for an open-circuit.

Remedy as necessary.

Try a new fuel pressure sensor if no fault is found during the above fault-tracing.

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. For resistance values: «COMPONENT SPECIFICATIONS»(ref-476694-S25701556572012060500000)
  7. see «FUEL PRESSURE SENSOR, REPLACEMENT»(ref-476695-S32874135222012060500000)
  8. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476757-S01436739592012060500000)

Check the fuel pressure sensor connectors. Check for contact resistance and oxidation.

Check the signal cable between control module terminal #A2 (#A2) and fuel 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 fuel pressure sensor terminal #1. Check for an open-circuit.

Remedy as necessary.

Try a new fuel pressure sensor if no fault is found during the above fault-tracing.

Other information

  1. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  2. For resistance values, see «COMPONENT SPECIFICATIONS»(ref-476694-S25701556572012060500000)
  3. To connect the breakout box, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  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. To access or replace the fuel pressure sensor, see «FUEL PRESSURE SENSOR, REPLACEMENT»(ref-476695-S32874135222012060500000) .
  1. Continue Refer to «VERIFICATION»(ref-476757-S15209059322012060500000)

CHECKING WIRING AND CONNECTORS

Check the heated oxygen sensor (HO2S) connector. Check for contact resistance and oxidation. Check for loose connections.

Check the signal cable between heated oxygen sensor (HO2S) terminal #4 and control module terminal #A18 (#A18). Check the power supply between system relay terminal #3 and heated oxygen sensor (HO2S) terminal #3. 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 «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S23777230272012060500000)
  3. For B6xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S05984728352012060500000) .
  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 «INFORMATION»(ref-476757-S01381918902012060500000)

Check the resistance of the heated oxygen sensor (HO2S) between terminals #3 and #4.

Check the signal cable between heated oxygen sensor (HO2S) terminal #4 and control module terminal #A18 (#A18). Check the power supply between system relay terminal #3 and heated oxygen sensor (HO2S) 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 B5xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S23777230272012060500000)
  3. For B6xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S05984728352012060500000) .
  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) .
  9. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000) .
  1. Continue Refer to «VERIFICATION»(ref-476757-S05105321222012060500000)

Check the signal cable between heated oxygen sensor (HO2S) terminal #4 and control module terminal #A18 (#A18). Check for an intermittent short-circuit to supply voltage.

Other information

  1. To connect the breakout box / access the control module, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  2. For B5xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S23777230272012060500000)
  3. For B6xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S05984728352012060500000) .
  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 «INFORMATION»(ref-476757-S36913609332012060500000)

Check the resistance of the heated oxygen sensor (HO2S) between terminals #3 and #4.

Check the signal cable between heated oxygen sensor (HO2S) terminal #4 and control module terminal #A18 (#A18). Check for a short-circuit to supply voltage.

HINT: Use a test lamp with at least a 3 W bulb to determine whether the cable is short-circuited to supply voltage.

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 «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S23777230272012060500000)
  3. For B6xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S05984728352012060500000) .
  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) .
  9. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000) .
  1. Continue Refer to «VERIFICATION»(ref-476757-S01021569652012060500000)

Check the signal cable between heated oxygen sensor (HO2S) terminal #4 and control module terminal #A18 (#A18). 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 «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S23777230272012060500000)
  3. For B6xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S05984728352012060500000) .
  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 «INFORMATION»(ref-476757-S22455530712012060500000)

Check the resistance of the heated oxygen sensor (HO2S) between terminals #3 and #4.

Check the signal cable between heated oxygen sensor (HO2S) terminal #4 and control module terminal #A18 (#A18). 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 «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S23777230272012060500000)
  3. For B6xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S05984728352012060500000) .
  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) .
  9. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000) .
  1. Continue Refer to «VERIFICATION»(ref-476757-S40590311052012060500000)

Check the fuel pressure sensor connectors. Check for contact resistance and oxidation.

Remedy as necessary.

Try a new fuel pressure sensor if no fault is found during the above fault-tracing.

Other information

  1. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17655503092012060500000)
  2. see «TEMPERATURE AND PRESSURE SENSORS, REPLACING»(ref-476695-S35429283012012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476757-S31902749732012060500000)

Check the fuel pressure sensor connectors. Check for contact resistance and oxidation.

Remedy as necessary.

Try a new fuel pressure sensor if no fault is found during the above fault-tracing.

Other information

  1. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  2. To connect the breakout box, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  3. For 5 cylinder turbocharged engines -2004, see «SIGNAL DESCRIPTION»(ref-476694-S26303328522012060500000)
  4. For 5 cylinder turbocharged engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S29505181092012060500000) .
  5. To access or replace the fuel pressure sensor, see «FUEL PRESSURE SENSOR, REPLACEMENT»(ref-476695-S32874135222012060500000) .
  1. Continue Refer to «VERIFICATION»(ref-476757-S08700835562012060500000)
CAUTIONDo not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.

Front heated oxygen sensor (HO2S), bank 1

Check the signal cable (+) between heated oxygen sensor (HO2S) terminal #1 and control module terminal #A41 (#A41). Check the cable for pump current between heated oxygen sensor (HO2S) terminal #6 and control module terminal #A24 (#A24). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.

Front heated oxygen sensor (HO2S), bank 2

Check the signal cable (+) between heated oxygen sensor (HO2S) terminal #1 and control module terminal #A43 (#A43). Check the cable for pump current between heated oxygen sensor (HO2S) terminal #6 and control module terminal #A25 (#A25). Check for an open-circuit, short-circuit to ground and a short-circuit to supply voltage.

Replace both heated oxygen sensors (HO2S) if the wiring is OK and no faults are found.

Remedy as necessary.

HINT: If the fault remains after fault-tracing/remedying, the fault may be in the circuit for the rear heated oxygen sensor (HO2S).

Other information

  1. To connect the breakout box / access the control module, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  2. For B5xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S23777230272012060500000)
  3. For B6xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S05984728352012060500000) .
  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 «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000) .
  1. Continue Refer to «VERIFICATION»(ref-476757-S02804164252012060500000)
CAUTIONDo not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.

HINT: The fault may be caused by a fault in the circuit for the rear heated oxygen sensor (HO2S).

Check the rear heated oxygen sensor (HO2S) connector. Check for contact resistance and oxidation.

Check the signal cable (+) between heated oxygen sensor (HO2S) terminal #4 and control module terminal #A61 (#B1). Check the signal cable (-) between heated oxygen sensor (HO2S) terminal #3 and control module terminal #A62 (#B2). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.

Replace the rear heated oxygen sensor (HO2S) if the wiring is OK.

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 «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S23777230272012060500000)
  3. For B6xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S05984728352012060500000) .
  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 «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000) .
  1. Continue Refer to «VERIFICATION»(ref-476757-S39223080212012060500000)
CAUTIONDo not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.

Check the heated oxygen sensor (HO2S) connector. Check for contact resistance and oxidation. Check for loose connections.

Check the signal cable (+) between heated oxygen sensor (HO2S) terminal #1 and control module terminal #A43 (#A43). Check the signal cable (-) between heated oxygen sensor (HO2S) terminal #5 and control module terminal #A44 (#A44). Check the cable for calibration current between heated oxygen sensor (HO2S) terminal #2 and control module terminal #A69 (#B9). Check the cable for pump current between heated oxygen sensor (HO2S) terminal #6 and control module terminal #A25 (#A25). Check for an intermittent short-circuit to supply voltage.

Check the signal cable (+) between heated oxygen sensor (HO2S) terminal #1 and control module terminal #A43 (#A43). Check the signal cable (-) between heated oxygen sensor (HO2S) terminal #5 and control module terminal #A44 (#A44). Check the cable for calibration current between heated oxygen sensor (HO2S) terminal #2 and control module terminal #A69 (#B9). Check the cable for pump current between heated oxygen sensor (HO2S) terminal #6 and control module terminal #A25 (#A25). Check for a short-circuit to ground.

Check the signal cable (+) between heated oxygen sensor (HO2S) terminal #1 and control module terminal #A43 (#A43). 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 «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S23777230272012060500000)
  3. For B6xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S05984728352012060500000) .
  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 «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000) .

Scheme 119

Scheme 119
Scheme 119
  1. Continue Refer to «INFORMATION»(ref-476757-S25981687412012060500000)
CAUTIONDo not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.

Check the heated oxygen sensor (HO2S) connector. Check for contact resistance and oxidation.

Check the signal cable (+) between heated oxygen sensor (HO2S) terminal #1 and control module terminal #A43 (#A43). Check the signal cable (-) between heated oxygen sensor (HO2S) terminal #5 and control module terminal #A44 (#A44). Check the cable for calibration current between heated oxygen sensor (HO2S) terminal #2 and control module terminal #A69 (#B9). Check the cable for pump current between heated oxygen sensor (HO2S) terminal #6 and control module terminal #A25 (#A25). Check for a short-circuit to supply voltage.

Check the signal cable (+) between heated oxygen sensor (HO2S) terminal #1 and control module terminal #A43 (#A43). Check the signal cable (-) between heated oxygen sensor (HO2S) terminal #5 and control module terminal #A44 (#A44). Check the cable for calibration current between heated oxygen sensor (HO2S) terminal #2 and control module terminal #A69 (#B9). Check the cable for pump current between heated oxygen sensor (HO2S) terminal #6 and control module terminal #A25 (#A25). Check for a short-circuit to ground.

Check the signal cable (+) between heated oxygen sensor (HO2S) terminal #1 and control module terminal #A43 (#A43). Check for an open-circuit.

If the connector and cables are OK try a new heated oxygen sensor (HO2S).

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 «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S23777230272012060500000)
  3. For B6xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S05984728352012060500000) .
  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 «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000) .
  1. Continue Refer to «VERIFICATION»(ref-476757-S14148171842012060500000)
CAUTIONDo not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.

Check the signal cable (+) between heated oxygen sensor (HO2S) terminal #1 and control module terminal #A43 (#A43). Check the signal cable (-) between heated oxygen sensor (HO2S) terminal #5 control module terminal #A44 (#A44). Check for an intermittent short-circuit to each other.

Check the power supply to heated oxygen sensor (HO2S) terminal #3. Check the signal cable between heated oxygen sensor (HO2S) terminal #4 and control module terminal #A17 (#A17). Check for an intermittent short-circuit to the other cables for the heated oxygen sensor (HO2S).

Other information

  1. To connect the breakout box / access the control module, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  2. For 6 cylinder engines -2004, see «SIGNAL SPECIFICATION»(ref-476694-S39196199822012060500000)
  3. For 6 cylinder engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S31890965202012060500000) .
  4. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000) .
  1. Continue Refer to «INFORMATION»(ref-476757-S17093185372012060500000)
CAUTIONDo not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.

Check the signal cable (+) between heated oxygen sensor (HO2S) terminal #1 and control module terminal #A43 (#A43). Check the signal cable (-) between heated oxygen sensor (HO2S) terminal #5 control module terminal #A44 (#A44). Check for a short-circuit to each other.

Check the power supply to heated oxygen sensor (HO2S) terminal #3. Check the signal cable between heated oxygen sensor (HO2S) terminal #4 and control module terminal #A17 (#A17). Check for a short-circuit to the other wiring for the heated oxygen sensor (HO2S).

Try a new heated oxygen sensor (HO2S) if the wiring is OK.

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 «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S23777230272012060500000)
  3. For B6xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S05984728352012060500000) .
  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 «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000) .
  1. Continue Refer to «VERIFICATION»(ref-476757-S29160835182012060500000)
CAUTIONDo not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.

Check the heated oxygen sensor (HO2S) connector. Check for contact resistance and oxidation. Check for loose connections.

Check the signal cable (-) between heated oxygen sensor (HO2S) terminal #5 and control module terminal #A44 (#A44). Check the cable for calibration current between heated oxygen sensor (HO2S) terminal #2 and heated oxygen sensor (HO2S) terminal #A69 (#B9). Check for an intermittent open-circuit.

Check the cable for calibration current between heated oxygen sensor (HO2S) terminal #2 and control module terminal #A69 (#B9). Check the cable for pump current between heated oxygen sensor (HO2S) terminal #6 and control module terminal #A25 (#A25). Check for an intermittent short-circuit to each other.

Other information

  1. To connect the breakout box / access the control module, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  2. For B5xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S23777230272012060500000)
  3. For B6xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S05984728352012060500000) .
  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 «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000) .
  1. Continue Refer to «INFORMATION»(ref-476757-S23741024802012060500000)
CAUTIONDo not apply rust solvent spray or grease to the heated oxygen sensor (HO2S) connector.

Check the heated oxygen sensor (HO2S) connector. Check for contact resistance and oxidation.

Check the signal cable (-) between heated oxygen sensor (HO2S) terminal #5 and control module terminal #A44 (#A44). Check the cable for calibration current between heated oxygen sensor (HO2S) terminal #2 and heated oxygen sensor (HO2S) terminal #A69 (#B9). Check for an open-circuit.

Check the cable for calibration current between heated oxygen sensor (HO2S) terminal #2 and control module terminal #A69 (#B9). Check the cable for pump current between heated oxygen sensor (HO2S) terminal #6 and control module terminal #A25 (#A54). Check for a short-circuit to each other.

If the connector and cables are OK try a new heated oxygen sensor (HO2S).

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 «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S23777230272012060500000)
  3. For B6xx4T, see «HEATED OXYGEN SENSOR (HO2S), REPLACING»(ref-476768-S05984728352012060500000) .
  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 «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000) .
  1. Continue Refer to «VERIFICATION»(ref-476757-S26383309542012060500000)

Check the fuel pressure sensor connectors. Check for contact resistance and oxidation.

Remedy as necessary.

Try a new fuel pressure sensor if no fault is found during the above fault-tracing.

Other information

  1. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  2. To connect the breakout box, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  3. For 5 cylinder turbocharged engines -2004, see «SIGNAL DESCRIPTION»(ref-476694-S26303328522012060500000)
  4. For 5 cylinder turbocharged engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S29505181092012060500000) .
  5. see «FUEL PRESSURE SENSOR, REPLACEMENT»(ref-476695-S32874135222012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476757-S41282110122012060500000)

Check the fuel pressure sensor connectors. Check for contact resistance and oxidation.

Remedy as necessary.

Try a new fuel pressure sensor if no fault is found during the above fault-tracing.

Other information

  1. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  2. To connect the breakout box, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  3. For 5 cylinder turbocharged engines -2004, see «SIGNAL DESCRIPTION»(ref-476694-S26303328522012060500000)
  4. For 5 cylinder turbocharged engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S29505181092012060500000) .
  5. see «FUEL PRESSURE SENSOR, REPLACEMENT»(ref-476695-S32874135222012060500000)
  1. Continue Refer to «VERIFICATION»(ref-476757-S15980945592012060500000)

Check the fuel pressure sensor connectors. Check for contact resistance and oxidation.

Remedy as necessary.

Try a new fuel pressure sensor if no fault is found during the above fault-tracing.

Other information

  1. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  2. To connect the breakout box, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  3. For 6 cylinder engines -2004, see «SIGNAL SPECIFICATION»(ref-476694-S39196199822012060500000)
  4. For 6 cylinder engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S31890965202012060500000) .
  5. see «CONTROL MODULE FUEL PUMP (FP), REPLACING»(ref-494826-S05872105882012081600000)
  1. Continue Refer to «VERIFICATION»(ref-476757-S04955437222012060500000)

Check the fuel pressure sensor connectors. Check for contact resistance and oxidation.

Remedy as necessary.

Try a new fuel pressure sensor if no fault is found during the above fault-tracing.

Other information

  1. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  2. To connect the breakout box, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  3. For 6 cylinder engines -2004, see «SIGNAL SPECIFICATION»(ref-476694-S39196199822012060500000)
  4. For 6 cylinder engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S31890965202012060500000) .
  5. see «CONTROL MODULE FUEL PUMP (FP), REPLACING»(ref-494826-S05872105882012081600000)
  1. Continue Refer to «VERIFICATION»(ref-476757-S14224971332012060500000)

Check the fuel pressure sensor connectors. Check for contact resistance and oxidation.

Remedy as necessary.

Try a new fuel pressure sensor if no fault is found during the above fault-tracing.

Other information

  1. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  2. To connect the breakout box, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  3. For 5 cylinder turbocharged engines -2004, see «SIGNAL DESCRIPTION»(ref-476694-S26303328522012060500000)
  4. For 5 cylinder turbocharged engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S29505181092012060500000) .
  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. To access or replace the fuel pressure sensor, see «FUEL PRESSURE SENSOR, REPLACEMENT»(ref-476695-S32874135222012060500000) .
  1. Continue Refer to «VERIFICATION»(ref-476757-S10976953692012060500000)

Check the fuel pressure sensor connectors. Check for contact resistance and oxidation.

Remedy as necessary.

Try a new fuel pressure sensor if no fault is found during the above fault-tracing.

Other information

  1. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  2. To connect the breakout box, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  3. For 5 cylinder turbocharged engines -2004, see «SIGNAL DESCRIPTION»(ref-476694-S26303328522012060500000)
  4. For 5 cylinder turbocharged engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S29505181092012060500000) .
  5. To access or replace the fuel pressure sensor, see «FUEL PRESSURE SENSOR, REPLACEMENT»(ref-476695-S32874135222012060500000) .
  1. Continue Refer to «VERIFICATION»(ref-476757-S17402754292012060500000)

Check the fuel pressure sensor connectors. Check for contact resistance and oxidation.

Remedy as necessary.

Try a new fuel pressure sensor if no fault is found during the above fault-tracing.

Other information

  1. see «CHECKING WIRING AND TERMINALS»(ref-476689-S17283010372012060500000)
  2. To connect the breakout box, see «CONNECTING THE BREAKOUT BOX»(ref-476691-S38062545372012060500000)
  3. For 5 cylinder turbocharged engines -2004, see «SIGNAL DESCRIPTION»(ref-476694-S26303328522012060500000)
  4. For 5 cylinder turbocharged engines 2005-, see «SIGNAL SPECIFICATION»(ref-476694-S29505181092012060500000) .
  5. To access or replace the fuel pressure sensor, see «FUEL PRESSURE SENSOR, REPLACEMENT»(ref-476695-S32874135222012060500000) .
  1. Continue Refer to «VERIFICATION»(ref-476757-S13059085272012060500000)

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