Engine Control Module (ECM) Diagnostic Trouble Codes (Xc) - 2 of 9: Wiring Volvo V70 II

Checking the components and wiring

Check the cable between engine control module (ECM) terminal #A61 (#B1) and heated oxygen sensor (HO2S) terminal #4. Check for a short-circuit to supply voltage.

Check the cable between engine control module (ECM) terminal #A62 (#B2) and heated oxygen sensor (HO2S) terminal #3. Check for a short-circuit to supply voltage.

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

Remedy as necessary.

Other information

1. See «Connecting the breakout box»(ref-430911-S30587875092011101900000)
2. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
3. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000)

Scheme 525

Scheme 526

1. Continue Refer to «Verification»(ref-430973-S26797912192011101900000)

Check the cable between engine control module (ECM) terminal #A61 (#B1) and heated oxygen sensor (HO2S) terminal #4. Check for a short-circuit to ground.

Check the cable between engine control module (ECM) terminal #A62 (#B2) and heated oxygen sensor (HO2S) terminal #3. Check for a short-circuit to ground.

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

Remedy as necessary.

Other information

1. See «Connecting the breakout box»(ref-430911-S30587875092011101900000)
2. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
3. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Verification»(ref-430973-S16479802862011101900000)

Check the resistance of the heated oxygen sensor (HO2S) between terminals #1 and #2.

Check the signal cable between heated oxygen sensor (HO2S) terminal #2 and control module terminal #A6 (#A6).

Check the power supply between system relay terminal #3 and heated oxygen sensor (HO2S) terminal #1. Check for an open-circuit.

Remedy as necessary.

Other information

1. See «Connecting the breakout box»(ref-430911-S30587875092011101900000)
2. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
3. For resistance values, see «Resistance values»(ref-430973-S03200089462012010600000)
4. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
5. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Verification»(ref-430973-S19701645442011101900000)

Check the resistance of the heated oxygen sensor (HO2S) between terminals #1 and #2.

Check the signal cable between heated oxygen sensor (HO2S) terminal #2 and control module terminal #A6 (#A6). Check for a short-circuit to supply voltage.

Remedy as necessary.

Other information

1. See «Connecting the breakout box»(ref-430911-S30587875092011101900000)
2. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
3. For resistance values, see «Resistance values»(ref-430973-S03200089462012010600000)
4. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
5. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Verification»(ref-430973-S13965268032011101900000)

Check the resistance of the heated oxygen sensor (HO2S) between terminals #1 and #2.

Check the signal cable between heated oxygen sensor (HO2S) terminal #2 and control module terminal #A6 (#A6). Check for a short-circuit to ground.

Remedy as necessary.

Other information

1. See «Connecting the breakout box»(ref-430911-S30587875092011101900000)
2. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
3. For resistance values, see «Resistance values»(ref-430973-S03200089462012010600000)
4. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
5. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Verification»(ref-430973-S16407874462011101900000)

Visually check that the rear heated oxygen sensors (HO2S) have not been mounted in the wrong bank on banks 1 and 2.

Read off the voltage of the probe on the rear heated oxygen sensor (HO2S) for bank 1.

Read off the voltage of the probe on the rear heated oxygen sensor (HO2S) for bank 2.

HINT: If the voltage is constantly close to 0 V on one bank and 1 V on the other bank, or vice-versa, the rear heated oxygen sensors (HO2S) have been switched.

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

Remedy as necessary.

Other information

1. See «Connecting the breakout box»(ref-430911-S30587875092011101900000)
2. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
3. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Verification»(ref-430973-S05124645112011101900000)

Checking wiring and connectors

Check the injector connector. Check for contact resistance and oxidation. Check for loose connections.

Check the cable between injector terminal 2 and control module

1. terminal #A16 (#A16) (ECM 2310)
2. terminal #A34 (#A34) (ECM 2320)
3. terminal #A15 (#A15) (ECM 2330)
4. terminal #A33(#A33) (ECM 2340)
5. terminal #A14 (#A14) (ECM 2350).

Check the power supply between system relay terminal 3 and injector terminal 1. Check for an for an intermittent open-circuit.

Other information

1. To connect the breakout box / access the control module, see «Connecting the breakout box»(ref-430911-S30587875092011101900000)
2. To access or replace the injector: For B5xx4T -2002, see «Injector/pulse damper, replacement»(ref-430965-S37381068772011101900000) For B5xx4T 2003-, see «Injector/pulse damper, replacement»(ref-430965-S11317162372011101900000) For B5xx4Tx 2005-, see «Injector/pulse damper, replacement»(ref-430965-S17789992482011101900000) .
3. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

Scheme 527

Scheme 528

1. Continue Refer to «Information»(ref-430973-S00575899802011101900000)

Checking components and wiring

Check the resistance of the injector between terminals 1 and 2.

Check the cable between injector terminal 2 and control module

1. terminal #A16 (#A16) (ECM 2310)
2. terminal #A34 (#A34) (ECM 2320)
3. terminal #A15 (#A15) (ECM 2330)
4. terminal #A33(#A33) (ECM 2340)
5. terminal #A14 (#A14) (ECM 2350).

Check the power supply between system relay terminal 3 and injector terminal 1. 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-430911-S30587875092011101900000)
2. To access or replace the injector: For B5xx4T -2002, see «Injector/pulse damper, replacement»(ref-430965-S37381068772011101900000) For B5xx4T 2003-, see «Injector/pulse damper, replacement»(ref-430965-S11317162372011101900000) For B5xx4Tx 2005-, see «Injector/pulse damper, replacement»(ref-430965-S17789992482011101900000) .
3. For resistance values, see «Resistance values»(ref-430973-S03200089462012010600000)
4. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .

1. Continue Refer to «Verification»(ref-430973-S16515408092011101900000)

Checking the wiring

Check the cable between injector terminal 2 and control module

1. terminal #A16 (#A16) (ECM 2310)
2. terminal #A34 (#A34) (ECM 2320)
3. terminal #A15 (#A15) (ECM 2330)
4. terminal #A33(#A33) (ECM 2340)
5. terminal #A14 (#A14) (ECM 2350).

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-430911-S30587875092011101900000)
2. To access or replace the injector: For B5xx4T -2002, see «Injector/pulse damper, replacement»(ref-430965-S37381068772011101900000) For B5xx4T 2003-, see «Injector/pulse damper, replacement»(ref-430965-S11317162372011101900000) For B5xx4Tx 2005-, see «Injector/pulse damper, replacement»(ref-430965-S17789992482011101900000) .
3. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

Scheme 529

1. Continue Refer to «Information»(ref-430973-S11558572142011101900000)

Check the resistance of the injector between terminals 1 and 2.

Check the cable between injector terminal 2 and control module

1. terminal #A16 (#A16) (ECM 2310)
2. terminal #A34 (#A34) (ECM 2320)
3. terminal #A15 (#A15) (ECM 2330)
4. terminal #A33(#A33) (ECM 2340)
5. terminal #A14 (#A14) (ECM 2350).

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-430911-S30587875092011101900000)
2. To access or replace the injector: For B5xx4T -2002, see «Injector/pulse damper, replacement»(ref-430965-S37381068772011101900000) For B5xx4T 2003-, see «Injector/pulse damper, replacement»(ref-430965-S11317162372011101900000) For B5xx4Tx 2005-, see «Injector/pulse damper, replacement»(ref-430965-S17789992482011101900000) .
3. For resistance values, see «Resistance values»(ref-430973-S03200089462012010600000)
4. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .

1. Continue Refer to «Verification»(ref-430973-S08199182432011101900000)

Check the cable between injector terminal 2 and control module

1. terminal #A16 (#A16) (ECM 2310)
2. terminal #A34 (#A34) (ECM 2320)
3. terminal #A15 (#A15) (ECM 2330)
4. terminal #A33(#A33) (ECM 2340)
5. terminal #A14 (#A14) (ECM 2350).

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-430911-S30587875092011101900000)
2. To access or replace the injector: For B5xx4T -2002, see «Injector/pulse damper, replacement»(ref-430965-S37381068772011101900000) For B5xx4T 2003-, see «Injector/pulse damper, replacement»(ref-430965-S11317162372011101900000) For B5xx4Tx 2005-, see «Injector/pulse damper, replacement»(ref-430965-S17789992482011101900000) .
3. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

1. Continue Refer to «Information»(ref-430973-S28326104382011101900000)

Check the resistance of the injector between terminals 1 and 2.

Check the cable between injector terminal 2 and control module

1. terminal #A16 (#A16) (ECM 2310)
2. terminal #A34 (#A34) (ECM 2320)
3. terminal #A15 (#A15) (ECM 2330)
4. terminal #A33(#A33) (ECM 2340)
5. terminal #A14 (#A14) (ECM 2350).

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-430911-S30587875092011101900000)
2. To access or replace the injector: For B5xx4T -2002, see «Injector/pulse damper, replacement»(ref-430965-S37381068772011101900000) For B5xx4T 2003-, see «Injector/pulse damper, replacement»(ref-430965-S11317162372011101900000) For B5xx4Tx 2005-, see «Injector/pulse damper, replacement»(ref-430965-S17789992482011101900000) .
3. For resistance values, see «Resistance values»(ref-430973-S03200089462012010600000)
4. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
5. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

1. Continue Refer to «Verification»(ref-430973-S36760466552011101900000)

Checking component and wiring

Check the cable between engine control module (ECM) #B45 (#B55) and central electronic module #14B (#A34) for an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults and for an intermittent open-circuit according to Open-circuit, intermittent faults .

Other information

1. Connecting the breakout box/accessing the control module, see «Connecting the breakout box»(ref-430911-S30587875092011101900000) .
2. To connect the central electronic module breakout box, see «Connecting the breakout box»(ref-430921-S33749793132011101900000) .
3. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .

Scheme 530

1. Continue Refer to «Information»(ref-430973-S23370721462011101900000)

Check the heated oxygen sensor (HO2S) pre-heating circuit. Measure the resistance between terminals #3 and #4 in the probe connector.

Note. If possible, measure from the rear of the affected connectors in order to minimize any damage and future loose connections.

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

Remedy as necessary.

Other information

1. See «Connecting the breakout box»(ref-430911-S30587875092011101900000)
2. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
3. For resistance values, see «Resistance values»(ref-430973-S03200089462012010600000)
4. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
5. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000)

Scheme 531

1. Continue Refer to «Verification»(ref-430973-S14425628462011101900000)

1. Check the heated oxygen sensor (HO2S) connector. Check for contact resistance and oxidation. Check the cable for calibration current between engine control module (ECM) terminal #A28 (#A28) and heated oxygen sensor (HO2S) terminal #2. Check the cable for pump current between heated oxygen sensor (HO2S) terminal #6 and engine control module (ECM) terminal #A24 (#A24). Check for a short-circuit to each other. Check the cable for an open-circuit. Check between: Heated oxygen sensor (HO2S) terminal #5 and engine control module (ECM) terminal #A42 (#A42) Heated oxygen sensor (HO2S) terminal #2 and engine control module (ECM) terminal #A28 (#A28). Remedy as necessary. Other information See «Connecting the breakout box»(ref-430911-S30587875092011101900000) For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) . To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) . See «Checking wiring and terminals»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Verification»(ref-430973-S24719867252011101900000)

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

Check the ground lead between engine control module (ECM) terminals #A18 (#A18) and heated oxygen sensor (HO2S) connector terminal #4. Check for a short-circuit to the other signal 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. See «Connecting the breakout box»(ref-430911-S30587875092011101900000)
2. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
3. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Verification»(ref-430973-S27972437372011101900000)

Check the signal cable between heated oxygen sensor (HO2S) #3 and the system relay. Check for contact resistance and oxidation.

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

Note. If possible, measure from the rear of the affected connectors in order to minimize any damage and future loose connections.

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

Remedy as necessary.

Other information

1. See «Connecting the breakout box»(ref-430911-S30587875092011101900000)
2. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
3. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Verification»(ref-430973-S26819846752011101900000)

Check the signal cable between heated oxygen sensor (HO2S) #3 and the system relay. Check for a short-circuit to supply voltage.

Note. If possible, measure from the rear of the affected connectors in order to minimize any damage and future loose connections.

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

Remedy as necessary.

Other information

1. See «Connecting the breakout box»(ref-430911-S30587875092011101900000)
2. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
3. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Verification»(ref-430973-S24049550302011101900000)

Check the signal cable between heated oxygen sensor (HO2S) terminal #3 and the system relay. Check for a short-circuit to ground.

Note. If possible, measure from the rear of the affected connectors in order to minimize any damage and future loose connections.

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

Remedy as necessary.

Other information

1. See «Connecting the breakout box»(ref-430911-S30587875092011101900000)
2. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
3. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Verification»(ref-430973-S29325298392011101900000)

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

Check the cable between engine control module (ECM) terminal #A28 (#A28) and heated oxygen sensor (HO2S) terminal #2. Check for an open-circuit.

Note. If possible, measure from the rear of the affected connectors in order to minimize any damage and future loose connections.

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

Remedy as necessary.

Other information

1. See «Connecting the breakout box»(ref-430911-S30587875092011101900000)
2. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
3. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Verification»(ref-430973-S07124210472011101900000)

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

Check the cable between engine control module (ECM) terminal #A28 (#A28) and heated oxygen sensor (HO2S) terminal #2. Check for an open-circuit.

Note. If possible, measure from the rear of the affected connectors in order to minimize any damage and future loose connections.

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

Remedy as necessary.

Other information

1. See «Connecting the breakout box»(ref-430911-S30587875092011101900000)
2. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
3. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Verification»(ref-430973-S03461702012011101900000)

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

Check between

1. The system relay and heated oxygen sensor (HO2S) terminal #3
2. Engine control module (ECM) terminal #A18 (#A18) and heated oxygen sensor (HO2S) terminal #4.

Note. If possible, measure from the rear of the affected connectors in order to minimize any damage and future loose connections.

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

Remedy as necessary.

Other information

1. See «Connecting the breakout box»(ref-430911-S30587875092011101900000)
2. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
3. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Verification»(ref-430973-S18759927832011101900000)

Check the cable for a short-circuit to ground.

Check between

1. The system relay and heated oxygen sensor (HO2S) terminal #3
2. Engine control module (ECM) terminal #A18 (#A18) and heated oxygen sensor (HO2S) terminal #4.

Note. If possible, measure from the rear of the affected connectors in order to minimize any damage and future loose connections.

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

Remedy as necessary.

Other information

1. See «Connecting the breakout box»(ref-430911-S30587875092011101900000)
2. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
3. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Verification»(ref-430973-S30388395162011101900000)

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

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

Note. If possible, measure from the rear of the affected connectors in order to minimize any damage and future loose connections.

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

Remedy as necessary.

Other information

1. See «Connecting the breakout box»(ref-430911-S30587875092011101900000)
2. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
3. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Verification»(ref-430973-S38046777752011101900000)

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

Check the cable between engine control module (ECM) terminal #A42 (#A42) and heated oxygen sensor (HO2S) terminal #5. Check for an open-circuit.

Note. If possible, measure from the rear of the affected connectors in order to minimize any damage and future loose connections.

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

Remedy as necessary.

Other information

1. See «Connecting the breakout box»(ref-430911-S30587875092011101900000)
2. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
3. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Verification»(ref-430973-S35847360412011101900000)

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: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
2. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
3. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Verification»(ref-430973-S08896025912011101900000)

Checking the wiring and component

Scheme 532

Scheme 533

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 «Resistance values»(ref-430973-S03200089462012010600000) See «Connecting the breakout box»(ref-430911-S30587875092011101900000) For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «Signal specification (B5204T5, B5234T3, B5234T7 and B5244T3 -2004)»(ref-430973-S35805337672012010900000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430973-S01154558992012010900000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) . For B5xx4x -2001, see «Thermostat / temperature sensor, engine coolant, replacing»(ref-430971-S38695460582011101900000) For B5xx4x 2002-2004, see «Replacing the thermostat and/or engine coolant temperature sensor»(ref-430971-S11844984362011101900000) For B5xx4Tx 2005-, see «Thermostat / temperature sensor, engine coolant, replacing»(ref-430971-S36682453302011101900000) . See «Checking wiring and terminals»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Verification»(ref-430973-S41336909512011101900000)

Checking the component and wiring

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-430911-S28555790612011101900000)
2. See «Signal specification»(ref-430975-S24350024032011101900000)
3. See «Component specifications»(ref-430975-S19541977602011101900000)
4. See «Thermostat / temperature sensor, engine coolant, replacing»(ref-430971-S36682453302011101900000)
5. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000)

1. Continue Refer to «Verification»(ref-430973-S11544566742011101900000)

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 «Resistance values»(ref-430973-S03200089462012010600000) See «Connecting the breakout box»(ref-430911-S30587875092011101900000) For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «Signal specification (B5204T5, B5234T3, B5234T7 and B5244T3 -2004)»(ref-430973-S35805337672012010900000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430973-S01154558992012010900000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) . For B5xx4x -2001, see «Thermostat / temperature sensor, engine coolant, replacing»(ref-430971-S38695460582011101900000) For B5xx4x 2002-2004, see «Replacing the thermostat and/or engine coolant temperature sensor»(ref-430971-S11844984362011101900000) For B5xx4Tx 2005-, see «Thermostat / temperature sensor, engine coolant, replacing»(ref-430971-S36682453302011101900000) . See «Checking wiring and terminals»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Verification»(ref-430973-S40043119162011101900000)

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-430909-S26456997912011101900000)
2. For resistance values, see «Resistance values»(ref-430973-S03200089462012010600000)
3. To connect the breakout box, see «Connecting the breakout box»(ref-430911-S30587875092011101900000)
4. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
5. To access or replace the fuel pressure sensor, see «Fuel pressure sensor, replacement»(ref-430961-S22891665062011101900000) .

Scheme 534

1. Continue Refer to «Verification»(ref-430973-S39439633232011101900000)

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-430911-S30587875092011101900000)
2. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
3. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

1. Continue Refer to «Information»(ref-430973-S09796013132011101900000)

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-430911-S30587875092011101900000)
2. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
3. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

1. Continue Refer to «Verification»(ref-430973-S31341805412011101900000)

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-430911-S30587875092011101900000)
2. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
3. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

1. Continue Refer to «Information»(ref-430973-S18641318782011101900000)

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-430911-S30587875092011101900000)
2. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
3. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

1. Continue Refer to «Verification»(ref-430973-S37731003162011101900000)

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-430911-S30587875092011101900000)
2. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
3. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

1. Continue Refer to «Verification»(ref-430973-S19941535142011101900000)

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-430911-S30587875092011101900000)
2. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
3. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

Scheme 535

Scheme 536

1. Continue Refer to «Verification»(ref-430973-S37433441122011101900000)

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-430911-S30587875092011101900000)
2. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
3. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

1. Continue Refer to «Information»(ref-430973-S29081633412011101900000)

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-430911-S30587875092011101900000)
2. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
3. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

1. Continue Refer to «Verification»(ref-430973-S20190862422011101900000)

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-430911-S30587875092011101900000)
2. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
3. For resistance values, see «Resistance values»(ref-430973-S03200089462012010600000)
4. See «Fuel pressure sensor, replacement»(ref-430961-S22891665062011101900000)
5. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Verification»(ref-430973-S29479976942011101900000)

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-430911-S30587875092011101900000)
2. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
3. For resistance values, see «Resistance values»(ref-430973-S03200089462012010600000)
4. See «Fuel pressure sensor, replacement»(ref-430961-S22891665062011101900000)
5. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Verification»(ref-430973-S04281972242011101900000)

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-430909-S26456997912011101900000)
2. For resistance values, see «Resistance values»(ref-430973-S03200089462012010600000)
3. To connect the breakout box, see «Connecting the breakout box»(ref-430911-S30587875092011101900000)
4. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
5. To access or replace the fuel pressure sensor, see «Fuel pressure sensor, replacement»(ref-430961-S22891665062011101900000) .

1. Continue Refer to «Verification»(ref-430973-S09982031612011101900000)

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-430911-S30587875092011101900000)
2. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
3. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

1. Continue Refer to «Information»(ref-430973-S25869934342011101900000)

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-430911-S30587875092011101900000)
2. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
3. For resistance values, see «Resistance values»(ref-430973-S03200089462012010600000)
4. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
5. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

1. Continue Refer to «Verification»(ref-430973-S27727895532011101900000)

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-430911-S30587875092011101900000)
2. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
3. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

1. Continue Refer to «Information»(ref-430973-S33919190632011101900000)

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-430911-S30587875092011101900000)
2. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
3. For resistance values, see «Resistance values»(ref-430973-S03200089462012010600000)
4. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
5. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

1. Continue Refer to «Verification»(ref-430973-S18191169512011101900000)

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-430911-S30587875092011101900000)
2. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
3. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
4. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

1. Continue Refer to «Information»(ref-430973-S02139812292011101900000)

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-430911-S30587875092011101900000)
2. To access or replace the heated oxygen sensor (HO2S): For B5xx4T -2004, see «Heated oxygen sensors (HO2S), replacing»(ref-430985-S33960067052011101900000) For B5xx4T 2005-, see «Heated oxygen sensor (HO2S), replacing»(ref-430985-S28241031382011101900000) .
3. For resistance values, see «Resistance values»(ref-430973-S03200089462012010600000)
4. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
5. See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

1. Continue Refer to «Verification»(ref-430973-S32287868302011101900000)

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-430909-S05889726072011101900000)
2. See «Temperature and pressure sensors, replacing»(ref-430961-S28993638692011101900000)

1. Continue Refer to «Verification»(ref-430973-S40307305642011101900000)

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 «Checking wiring and terminals»(ref-430909-S26456997912011101900000)
2. To connect the breakout box and access the control module, see «Connecting the breakout box»(ref-430911-S30587875092011101900000)
3. To access or replace the heated oxygen sensor (HO2S), see «Replacing lambda probes»(ref-430973-S41782866542012010900000)
4. For information about the resistance values, see «Component specifications»(ref-430975-S24294221072011101900000)
5. For information about signals on 5 cylinder engines, see «Signal specification»(ref-430975-S11230688812011101900000)

1. Continue Refer to «Verification»(ref-430973-S29113376352011101900000)

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 «Checking wiring and terminals»(ref-430909-S26456997912011101900000)
2. To connect the breakout box and access the control module, see «Connecting the breakout box»(ref-430911-S30587875092011101900000)
3. To access or replace the heated oxygen sensor (HO2S), see «Replacing lambda probes»(ref-430973-S41782866542012010900000)
4. For information about the resistance values, see «Component specifications»(ref-430975-S24294221072011101900000)
5. For information about signals on 5 cylinder engines, see «Signal specification»(ref-430975-S11230688812011101900000)

1. Continue Refer to «Verification»(ref-430973-S28732567902011101900000)

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 «Checking wiring and terminals»(ref-430909-S26456997912011101900000)
2. To connect the breakout box and access the control module, see «Connecting the breakout box»(ref-430911-S30587875092011101900000)
3. To access or replace the heated oxygen sensor (HO2S) see «Replacing lambda probes»(ref-430973-S41782866542012010900000)
4. For information about the resistance values, see «Component specifications»(ref-430975-S24294221072011101900000)
5. For information about signals on 5 cylinder engines, see «Signal specification»(ref-430975-S11230688812011101900000)

1. Continue Refer to «Verification»(ref-430973-S18703525002011101900000)

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-430909-S26456997912011101900000)
2. To connect the breakout box, see «Connecting the breakout box»(ref-430911-S30587875092011101900000)
3. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
4. To access or replace the fuel pressure sensor, see «Fuel pressure sensor, replacement»(ref-430961-S22891665062011101900000) .

1. Continue Refer to «Verification»(ref-430973-S14604288302011101900000)

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-430909-S26456997912011101900000)
2. To connect the breakout box, see «Connecting the breakout box»(ref-430911-S30587875092011101900000)
3. For information about signals: For 5 cylinder turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 5 cylinder turbocharged engines 2002, see «Signal specification»(ref-430975-S11230688812011101900000) For B5254T2 -2004, see «Signal description»(ref-430975-S13000059482011101900000) For B5204T5, B5234T3, B5234T7 and B5244T3 -2004, see «SIGNAL SPECIFICATION (B5204T5, B5234T3, B5234T7 AND B5244T3 -2004)»(ref-430960-S25929380012012010600000) For B5254T4 2004, see «SIGNAL SPECIFICATION (B5254T4 2004)»(ref-430960-S08864610392012010600000) For 5 cylinder turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
4. See «Fuel pressure sensor, replacement»(ref-430961-S22891665062011101900000)

1. Continue Refer to «Verification»(ref-430973-S32657856262011101900000)