Engine Control Module (ECM) Diagnostic Trouble Codes - 4 of 11: Wiring Volvo S80 I

Checking the components and wiring

Check the heated oxygen sensor (HO2S) connector. Check for contact resistance. Check for an open-circuit. Check for oxidation.

Check that the heated oxygen sensor (HO2S) is correctly installed in the exhaust system.

Try a new heated oxygen sensor (HO2S) if the above fault-tracing does not remedy the fault.

Remedy as necessary.

Other information

1. For information about signals on 5 cylinder engines, see «Signal specification»(ref-440214-S33124753252011121400000)
2. For information about signals on 6 cylinder engines: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
3. To access or replace the heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-461749-S04698377542012040200000)
4. See «Contents»(ref-440209-S18666729612011121400000)

Scheme 83

Scheme 84

1. Continue Refer to «Verification»(ref-440276-S17668868972011121400000)

Checking the wiring

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 85

Scheme 86

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 «Contents»(ref-440209-S18666729612011121400000) See «Connecting the breakout box»(ref-440211-S03702023042011121400000) See «Temperature sensor engine coolant, replacing»(ref-461758-S26261417092012040200000) See «Component specifications»(ref-461750-S34427939622012040200000) For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .

Were any faults found in the ground cable?

1. YES Refer to «Verification»(ref-440276-S26911974502011121400000)
2. NO Refer to «Checking engine coolant temperature (ECT)»(ref-440276-S22444818092011121400000)

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 «Contents»(ref-440209-S18666729612011121400000) See «Connecting the breakout box»(ref-440211-S03702023042011121400000) See «Temperature sensor engine coolant, replacing»(ref-461758-S26261417092012040200000) See «Component specifications»(ref-461750-S34427939622012040200000) For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .

Were any faults found in the ground cable?

1. YES Refer to «Verification»(ref-440276-S39866170532011121400000)
2. NO Refer to «Checking engine coolant temperature (ECT)»(ref-440276-S25881572762011121400000)

Checking the wiring and component

Scheme 87

Scheme 88

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-440211-S03702023042011121400000) See «Signal specification»(ref-440214-S33124753252011121400000) See «Component specifications»(ref-461750-S34427939622012040200000) See «Temperature sensor engine coolant, replacing»(ref-461758-S26261417092012040200000) See «Contents»(ref-440209-S18666729612011121400000)

1. Continue Refer to «Verification»(ref-440276-S21529274182011121400000)

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-440211-S03702023042011121400000) For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) . See «Component specifications»(ref-461750-S34427939622012040200000) See «Temperature sensor engine coolant, replacing»(ref-461758-S26261417092012040200000) See «Contents»(ref-440209-S18666729612011121400000)

1. Continue Refer to «Verification»(ref-440276-S42463993052011121400000)

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-440211-S03702023042011121400000) See «Signal specification»(ref-440214-S33124753252011121400000) See «Component specifications»(ref-461750-S34427939622012040200000) See «Temperature sensor engine coolant, replacing»(ref-461758-S26261417092012040200000) See «Contents»(ref-440209-S18666729612011121400000)

1. Continue Refer to «Verification»(ref-440276-S35419959572011121400000)

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-440211-S03702023042011121400000) For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) . See «Component specifications»(ref-461750-S34427939622012040200000) See «Temperature sensor engine coolant, replacing»(ref-461758-S26261417092012040200000) See «Contents»(ref-440209-S18666729612011121400000)

1. Continue Refer to «Verification»(ref-440276-S27809691712011121400000)

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 «Contents»(ref-440209-S18666729612011121400000)
2. For resistance values, see «Component specifications»(ref-461750-S34427939622012040200000)
3. To connect the breakout box, see «Connecting the breakout box»(ref-440211-S03702023042011121400000)
4. For information about signals, see «Signal specification»(ref-440214-S33124753252011121400000)
5. To access or replace the fuel pressure sensor, see «Fuel pressure sensor, replacement»(ref-440263-S40470711862011121400000) .

Scheme 89

1. Continue Refer to «Verification»(ref-440276-S26046382912011121400000)

Checking connectors and wiring

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-440211-S03702023042011121400000)
2. To access or replace the heated oxygen sensor (HO2S) for the C70, S70, V70 -2000 and V70XC, see «Adapter wiring switch, replacing»(ref-461748-S13075222492012040200000) . For other models, see «Heated oxygen sensor (HO2S), replacing»(ref-461749-S04698377542012040200000)
3. For information about signals on 5 cylinder engines, see «Signal specification»(ref-440214-S33124753252011121400000)
4. For information about signals on 6 cylinder engines: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
5. See «Contents»(ref-440209-S18666729612011121400000) .

Scheme 90

1. Continue Refer to «Information»(ref-440276-S30802488732011121400000)

Checking connector, wiring and components

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-440211-S03702023042011121400000)
2. To access or replace the heated oxygen sensor (HO2S) for the C70, S70, V70 -2000 and V70XC, see «Adapter wiring switch, replacing»(ref-461748-S13075222492012040200000) . For other models, see «Heated oxygen sensor (HO2S), replacing»(ref-461749-S04698377542012040200000)
3. For information about signals on 5 cylinder engines, see «Signal specification»(ref-440214-S33124753252011121400000)
4. For information about signals on 6 cylinder engines: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
5. See «Contents»(ref-440209-S18666729612011121400000) .

1. Continue Refer to «Verification»(ref-440276-S40413823502011121400000)

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-440211-S03702023042011121400000)
2. To access or replace the heated oxygen sensor (HO2S) for the C70, S70, V70 -2000 and V70XC, see «Adapter wiring switch, replacing»(ref-461748-S13075222492012040200000) . For other models, see «Heated oxygen sensor (HO2S), replacing»(ref-461749-S04698377542012040200000)
3. For information about signals on 5 cylinder engines, see «Signal specification»(ref-440214-S33124753252011121400000)
4. For information about signals on 6 cylinder engines: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
5. See «Contents»(ref-440209-S18666729612011121400000) .

1. Continue Refer to «Information»(ref-440276-S37280871572011121400000)

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-440211-S03702023042011121400000)
2. To access or replace the heated oxygen sensor (HO2S) for the C70, S70, V70 -2000 and V70XC, see «Adapter wiring switch, replacing»(ref-461748-S13075222492012040200000) . For other models, see «Heated oxygen sensor (HO2S), replacing»(ref-461749-S04698377542012040200000)
3. For information about signals on 5 cylinder engines, see «Signal specification»(ref-440214-S33124753252011121400000)
4. For information about signals on 6 cylinder engines: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
5. See «Contents»(ref-440209-S18666729612011121400000) .

1. Continue Refer to «Verification»(ref-440276-S42460022062011121400000)

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-440211-S03702023042011121400000)
2. To access or replace the heated oxygen sensor (HO2S) for the C70, S70, V70 -2000 and V70XC, see «Adapter wiring switch, replacing»(ref-461748-S13075222492012040200000) . For other models, see «Heated oxygen sensor (HO2S), replacing»(ref-461749-S04698377542012040200000)
3. For information about signals on 5 cylinder engines, see «Signal specification»(ref-440214-S33124753252011121400000)
4. For information about signals on 6 cylinder engines: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
5. See «Contents»(ref-440209-S18666729612011121400000) .

1. Continue Refer to «Verification»(ref-440276-S13176029222011121400000)

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-440211-S03702023042011121400000)
2. To access or replace the heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-461749-S04698377542012040200000)
3. For information about signals on 5 cylinder engines, see «Signal specification»(ref-440214-S33124753252011121400000)
4. For information about signals on 6 cylinder engines: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
5. See «Contents»(ref-440209-S18666729612011121400000) .

Scheme 91

Scheme 92

Scheme 93

1. Continue Refer to «Verification»(ref-440276-S00168975752011121400000)

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-440211-S03702023042011121400000)
2. To access or replace the heated oxygen sensor (HO2S) for the C70, S70, V70 -2000 and V70XC, see «Adapter wiring switch, replacing»(ref-461748-S13075222492012040200000) . For other models, see «Heated oxygen sensor (HO2S), replacing»(ref-461749-S04698377542012040200000)
3. For information about signals on 5 cylinder engines, see «Signal specification»(ref-440214-S33124753252011121400000)
4. For information about signals on 6 cylinder engines: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
5. See «Contents»(ref-440209-S18666729612011121400000) .

1. Continue Refer to «Information»(ref-440276-S20828678662011121400000)

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-440211-S03702023042011121400000)
2. To access or replace the heated oxygen sensor (HO2S) for the C70, S70, V70 -2000 and V70XC, see «Adapter wiring switch, replacing»(ref-461748-S13075222492012040200000) . For other models, see «Heated oxygen sensor (HO2S), replacing»(ref-461749-S04698377542012040200000)
3. For information about signals on 5 cylinder engines, see «Signal specification»(ref-440214-S33124753252011121400000)
4. For information about signals on 6 cylinder engines: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
5. See «Contents»(ref-440209-S18666729612011121400000) .

1. Continue Refer to «Verification»(ref-440276-S15976814842011121400000)

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-440211-S03702023042011121400000)
2. For information about signals for 5 cylinder engines: «Signal specification»(ref-440214-S33124753252011121400000)
3. For information about signals on 6 cylinder engines: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
4. For resistance values: «Component specifications»(ref-461750-S34427939622012040200000)
5. See «Fuel pressure sensor, replacement»(ref-440263-S40470711862011121400000)
6. See «Contents»(ref-440209-S18666729612011121400000)

1. Continue Refer to «Verification»(ref-440276-S12706628832011121400000)

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 «Contents»(ref-440209-S18666729612011121400000)
2. For resistance values, see «Component specifications»(ref-461750-S34427939622012040200000)
3. To connect the breakout box, see «Connecting the breakout box»(ref-440211-S03702023042011121400000)
4. For information about signals, see «Signal specification»(ref-440214-S33124753252011121400000)
5. To access or replace the fuel pressure sensor, see «Fuel pressure sensor, replacement»(ref-440263-S40470711862011121400000) .

1. Continue Refer to «Verification»(ref-440276-S09477428302011121400000)

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-440211-S03702023042011121400000)
2. To access or replace the heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-461749-S04698377542012040200000)
3. For information about signals on 5 cylinder engines, see «Signal specification»(ref-440214-S33124753252011121400000)
4. For information about signals on 6 cylinder engines: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
5. See «Contents»(ref-440209-S18666729612011121400000) .

1. Continue Refer to «Information»(ref-440276-S30210348882011121400000)

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-440211-S03702023042011121400000)
2. To access or replace the heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-461749-S04698377542012040200000)
3. For resistance values, see «Component specifications»(ref-461750-S34427939622012040200000)
4. For information about signals on 5 cylinder engines, see «Signal specification»(ref-440214-S33124753252011121400000)
5. For information about signals on 6 cylinder engines: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
6. See «Contents»(ref-440209-S18666729612011121400000) .

1. Continue Refer to «Verification»(ref-440276-S16582655632011121400000)

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-440211-S03702023042011121400000)
2. To access or replace the heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-461749-S04698377542012040200000)
3. For information about signals on 5 cylinder engines, see «Signal specification»(ref-440214-S33124753252011121400000)
4. For information about signals on 6 cylinder engines: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
5. See «Contents»(ref-440209-S18666729612011121400000) .

1. Continue Refer to «Information»(ref-440276-S37947191442011121400000)

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-440211-S03702023042011121400000)
2. To access or replace the heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-461749-S04698377542012040200000)
3. For resistance values, see «Component specifications»(ref-461750-S34427939622012040200000)
4. For information about signals on 5 cylinder engines, see «Signal specification»(ref-440214-S33124753252011121400000)
5. For information about signals on 6 cylinder engines: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
6. See «Contents»(ref-440209-S18666729612011121400000) .

1. Continue Refer to «Verification»(ref-440276-S07883183702011121400000)

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-440211-S03702023042011121400000)
2. To access or replace the heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-461749-S04698377542012040200000)
3. For information about signals on 5 cylinder engines, see «Signal specification»(ref-440214-S33124753252011121400000)
4. For information about signals on 6 cylinder engines: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
5. See «Contents»(ref-440209-S18666729612011121400000) .

1. Continue Refer to «Information»(ref-440276-S17480906422011121400000)

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-440211-S03702023042011121400000)
2. To access or replace the heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-461749-S04698377542012040200000)
3. For resistance values, see «Component specifications»(ref-461750-S34427939622012040200000)
4. For information about signals on 5 cylinder engines, see «Signal specification»(ref-440214-S33124753252011121400000)
5. For information about signals on 6 cylinder engines: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
6. See «Contents»(ref-440209-S18666729612011121400000) .

1. Continue Refer to «Verification»(ref-440276-S06255140352011121400000)

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. See «Contents»(ref-440209-S18666729612011121400000)
2. To connect the breakout box and access the control module, see «Connecting the breakout box»(ref-440211-S03702023042011121400000)
3. To access or replace the heated oxygen sensor (HO2S), see «Replacing lambda probes»(ref-461749-S07123892362012040200000)
4. For information about the resistance values, see «Component specifications»(ref-440279-S32869788892011121400000)
5. For information about signals on 5 cylinder engines, see «Signal specification»(ref-440214-S19056685512011121400000)
6. For information about signals on 6 cylinder engines, see «Signal specification»(ref-440279-S30114162992011121400000) .

1. Continue Refer to «Verification»(ref-440276-S15026103582011121400000)

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. See «Contents»(ref-440209-S18666729612011121400000)
2. To connect the breakout box and access the control module, see «Connecting the breakout box»(ref-440211-S03702023042011121400000)
3. To access or replace the heated oxygen sensor (HO2S), see «Replacing lambda probes»(ref-461749-S07123892362012040200000)
4. For information about the resistance values, see «Component specifications»(ref-440279-S32869788892011121400000)
5. For information about signals on 5 cylinder engines, see «Signal specification»(ref-440214-S19056685512011121400000)
6. For information about signals on 6 cylinder engines, see «Signal specification»(ref-440279-S30114162992011121400000) .

1. Continue Refer to «Verification»(ref-440276-S31892907452011121400000)

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. See «Contents»(ref-440209-S18666729612011121400000)
2. To connect the breakout box and access the control module, see «Connecting the breakout box»(ref-440211-S03702023042011121400000)
3. To access or replace the heated oxygen sensor (HO2S) see «Replacing lambda probes»(ref-461749-S07123892362012040200000)
4. For information about the resistance values, see «Component specifications»(ref-440279-S32869788892011121400000)
5. For information about signals on 5 cylinder engines, see «Signal specification»(ref-440214-S19056685512011121400000)
6. For information about signals on 6 cylinder engines, see «Signal specification»(ref-440279-S30114162992011121400000) .

1. Continue Refer to «Verification»(ref-440276-S41165086222011121400000)

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 «Contents»(ref-440209-S18666729612011121400000)
2. To connect the breakout box, see «Connecting the breakout box»(ref-440211-S03702023042011121400000)
3. For information about signals, see «Signal specification»(ref-440214-S33124753252011121400000)
4. To access or replace the fuel pressure sensor, see «Fuel pressure sensor, replacement»(ref-440263-S40470711862011121400000) .

1. Continue Refer to «Verification»(ref-440276-S28077918122011121400000)

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-440211-S03702023042011121400000)
2. To access or replace the heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-461749-S04698377542012040200000)
3. For information about signals: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
4. See «Contents»(ref-440209-S18666729612011121400000) .

1. Continue Refer to «Verification»(ref-440276-S00153502282011121400000)

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-440211-S03702023042011121400000)
2. To access or replace the heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-461749-S04698377542012040200000)
3. For information about signals: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
4. See «Contents»(ref-440209-S18666729612011121400000) .

1. Continue Refer to «Verification»(ref-440276-S31530028402011121400000)

Check the signal cable (+) between heated oxygen sensor (HO2S) terminal #1 and control module terminal #A43 (A#43). 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.

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 and access the control module, see «Connecting the breakout box»(ref-440211-S03702023042011121400000)
2. To access or replace the heated oxygen sensor (HO2S), see «Heated oxygen sensors (HO2S), replacing»(ref-440280-S17464517122011121400000)
3. For information about signals: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
4. See «Contents»(ref-440209-S18666729612011121400000) .

Scheme 94

1. Continue Refer to «Verification»(ref-440276-S29005236832011121400000)

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 rear heated oxygen sensor (HO2S) terminal #4 and control module terminal #A10 (#A10) and the signal cable (-) between heated oxygen sensor (HO2S) terminal #3 and control module terminal #A11 (#A11). Check for an open-circuit, a short-circuit to ground and 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 and access the control module, see «Connecting the breakout box»(ref-440211-S03702023042011121400000)
2. To access or replace the heated oxygen sensor (HO2S), see «Heated oxygen sensors (HO2S), replacing»(ref-440280-S17464517122011121400000)
3. For information about signals: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
4. See «Contents»(ref-440209-S18666729612011121400000) .

1. Continue Refer to «Verification»(ref-440276-S05850221842011121400000)

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-440211-S03702023042011121400000)
2. To access or replace the heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-461749-S04698377542012040200000)
3. For information about signals: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
4. See «Contents»(ref-440209-S18666729612011121400000) .

1. Continue Refer to «Information»(ref-440276-S10961717842011121400000)

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-440211-S03702023042011121400000)
2. To access or replace the heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-461749-S04698377542012040200000)
3. For information about signals: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
4. See «Contents»(ref-440209-S18666729612011121400000) .

1. Continue Refer to «Verification»(ref-440276-S26986152822011121400000)

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-440211-S03702023042011121400000)
2. For information about signals: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
3. See «Contents»(ref-440209-S18666729612011121400000) .

1. Continue Refer to «Information»(ref-440276-S03596331462011121400000)

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-440211-S03702023042011121400000)
2. To access or replace the heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-461749-S04698377542012040200000)
3. For information about signals: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
4. See «Contents»(ref-440209-S18666729612011121400000) .

1. Continue Refer to «Verification»(ref-440276-S21973842082011121400000)

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-440211-S03702023042011121400000)
2. To access or replace the heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-461749-S04698377542012040200000)
3. For information about signals: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
4. See «Contents»(ref-440209-S18666729612011121400000) .

1. Continue Refer to «Information»(ref-440276-S29045872962011121400000)

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-440211-S03702023042011121400000)
2. To access or replace the heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-461749-S04698377542012040200000)
3. For information about signals: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
4. See «Contents»(ref-440209-S18666729612011121400000) .

1. Continue Refer to «Verification»(ref-440276-S28095303942011121400000)

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 «Contents»(ref-440209-S18666729612011121400000)
2. To connect the breakout box, see «Connecting the breakout box»(ref-440211-S03702023042011121400000)
3. For information about signals, see «Signal specification»(ref-440214-S33124753252011121400000)
4. See «Fuel pressure sensor, replacement»(ref-440263-S40470711862011121400000)

1. Continue Refer to «Verification»(ref-440276-S01641313242011121400000)

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 «Contents»(ref-440209-S18666729612011121400000)
2. To connect the breakout box, see «Connecting the breakout box»(ref-440211-S03702023042011121400000)
3. For information about signals, see «Signal specification»(ref-440214-S33124753252011121400000)
4. See «Fuel pressure sensor, replacement»(ref-440263-S40470711862011121400000)

1. Continue Refer to «Verification»(ref-440276-S35814159962011121400000)

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 «Contents»(ref-440209-S18666729612011121400000)
2. To connect the breakout box, see «Connecting the breakout box»(ref-440211-S03702023042011121400000)
3. For information about signals, see «Signal specification»(ref-440214-S33124753252011121400000)
4. To access or replace the fuel pressure sensor, see «Fuel pressure sensor, replacement»(ref-440263-S40470711862011121400000) .

1. Continue Refer to «Verification»(ref-440276-S23749299802011121400000)

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 «Contents»(ref-440209-S18666729612011121400000)
2. To connect the breakout box, see «Connecting the breakout box»(ref-440211-S03702023042011121400000)
3. For information about signals, see «Signal specification»(ref-440214-S33124753252011121400000)
4. To access or replace the fuel pressure sensor, see «Fuel pressure sensor, replacement»(ref-440263-S40470711862011121400000) .

1. Continue Refer to «Verification»(ref-440276-S01454428412011121400000)

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 #A70 (#B10). Check the power supply between system relay terminal #5 and heated oxygen sensor (HO2S) terminal #3. Check for an open-circuit.

Remedy as necessary.

Other information

1. For information about signals: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
2. To connect the breakout box / access the control module, see «Connecting the breakout box»(ref-440211-S03702023042011121400000)
3. To access or replace the heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-461749-S04698377542012040200000)
4. For resistance values, see «Component specifications»(ref-461750-S34427939622012040200000)
5. See «Contents»(ref-440209-S18666729612011121400000) .

1. Continue Refer to «Verification»(ref-440276-S08529433852011121400000)

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 #A70 (#B10). Check for a short-circuit to supply voltage.

Remedy as necessary.

Other information

1. For information about signals: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
2. To connect the breakout box / access the control module, see «Connecting the breakout box»(ref-440211-S03702023042011121400000)
3. To access or replace the heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-461749-S04698377542012040200000)
4. For resistance values, see «Component specifications»(ref-461750-S34427939622012040200000)
5. See «Contents»(ref-440209-S18666729612011121400000) .

1. Continue Refer to «Verification»(ref-440276-S25002650942011121400000)

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 #A70 (#B10). Check for a short-circuit to ground.

Remedy as necessary.

Other information

1. For information about signals: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .
2. To connect the breakout box / access the control module, see «Connecting the breakout box»(ref-440211-S03702023042011121400000)
3. To access or replace the heated oxygen sensor (HO2S), see «Heated oxygen sensor (HO2S), replacing»(ref-461749-S04698377542012040200000)
4. For resistance values, see «Component specifications»(ref-461750-S34427939622012040200000)
5. See «Contents»(ref-440209-S18666729612011121400000) .

1. Continue Refer to «Verification»(ref-440276-S02467784922011121400000)

Checking wiring and components

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

Check signal cable between heated oxygen sensor (HO2S) #4 and control module #A17 (#A17) and power supply between system relay #3 and heated oxygen sensor (HO2S) #3 for an open-circuit according to Open-circuit, permanent faults .

Remedy as necessary.

Other information

1. Connecting the breakout box/accessing the control module, see «Connecting the breakout box»(ref-440211-S03702023042011121400000) .
2. To access/replace the heated oxygen sensor (HO2S), see «Heated oxygen sensors (HO2S), replacing»(ref-440280-S17464517122011121400000) .
3. For resistance values, see «Component specifications»(ref-461750-S34427939622012040200000) .
4. For information about signals: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .

1. Continue Refer to «Verification»(ref-440276-S10872398642011121400000)

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

Check signal cable between heated oxygen sensor (HO2S) #4 and control module #A17 (#A17) for a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults

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. Connecting the breakout box/accessing the control module, see «Connecting the breakout box»(ref-440211-S03702023042011121400000) .
2. To access/replace the heated oxygen sensor (HO2S), see «Heated oxygen sensors (HO2S), replacing»(ref-440280-S17464517122011121400000) .
3. For resistance values, see «Component specifications»(ref-461750-S34427939622012040200000) .
4. For information about signals: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .

1. Continue Refer to «Verification»(ref-440276-S19962819272011121400000)

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

Check signal cable between heated oxygen sensor (HO2S) #4 and control module #A17 (#A17) for a short-circuit to ground according to Short-circuit to ground, permanent faults .

Remedy as necessary.

Other information

1. Connecting the breakout box/accessing the control module, see «Connecting the breakout box»(ref-440211-S03702023042011121400000) .
2. To access/replace the heated oxygen sensor (HO2S), see «Heated oxygen sensors (HO2S), replacing»(ref-440280-S17464517122011121400000) .
3. For resistance values, see «Component specifications»(ref-461750-S34427939622012040200000) .
4. For information about signals: For 6 cylinder engines -2001, see «Signal specification»(ref-440279-S16581672222011121400000) For 6 cylinder engines 2002-, see «Signal specification»(ref-440279-S30114162992011121400000) For 6 cylinder engines -2004, see «Signal specification»(ref-440279-S11542834502011121400000) For 6 cylinder engines 2005-, see «Signal specification»(ref-440279-S13492600202011121400000) .

1. Continue Refer to «Verification»(ref-440276-S25723861462011121400000)

Check the pump control module connector. Check for contact resistance and oxidation.

Check the cable between Engine Control Module (ECM) terminal #B47 (#B57) and pump control module terminal #1. Check for an open circuit, short circuit to ground and supply voltage.

Remedy as necessary.

HINT: The diagnostic trouble code (DTC) may be caused by a defective pump control module.

Other information

1. See «Contents»(ref-440209-S18666729612011121400000)
2. To connect the breakout box, see «Connecting the breakout box»(ref-440211-S03702023042011121400000)
3. For information about signals, see «Signal specification»(ref-440214-S33124753252011121400000)
4. See «Control module fuel pump (FP), replacing»(ref-440263-S25097834532011121400000)

Scheme 95

1. Continue Refer to «Verification»(ref-440276-S33061298002011121400000)

Check the pump control module connector. Check for contact resistance and oxidation.

Check the cable between Engine Control Module (ECM) terminal #B47 (#B57) and pump control module terminal #1. Check for an open circuit, short circuit to ground and supply voltage.

Remedy as necessary.

HINT: The diagnostic trouble code (DTC) may be caused by a defective pump control module.

Other information

1. See «Contents»(ref-440209-S18666729612011121400000)
2. To connect the breakout box, see «Connecting the breakout box»(ref-440211-S03702023042011121400000)
3. For information about signals, see «Signal specification»(ref-440214-S33124753252011121400000)
4. See «Control module fuel pump (FP), replacing»(ref-440263-S35320384212011121400000)

1. Continue Refer to «Verification»(ref-440276-S15486477892011121400000)