Engine Control Module (ECM) Diagnostic Trouble Codes (Xc) - 8 of 9: Wiring Volvo V70 II

Checking components and wiring

1. Ignition off. Check the throttle unit and engine control module (ECM) connectors. Check for contact resistance and oxidation. Check the resistance values of the potentiometers in the throttle unit. Check the power supply cable (5 volts) between engine control module (ECM) terminal #A59 (#A59) and throttle unit terminal #3 (wiring side). Check for an open-circuit. Check for a short-circuit to ground. HINT: With the ignition on, the power supply to the throttle unit potentiometers must be approximately 5 V measured between throttle unit connector terminals #2 and #3 (wiring side). Check the signal cable (potentiometer 2) between engine control module (ECM) terminal #A20 (#A20) and throttle unit terminal #5 (wiring side). Check for an open-circuit. Check for a short-circuit to ground. If no faults are found during the checks and the diagnostic trouble code (DTC) recurs, try replacing the throttle unit. NOTE: When replacing the throttle unit, the throttle unit must be adapted. See «Adaptation of the throttle unit»(ref-430995-S27404488562011101900000) . Remedy as necessary. Other information: See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) For resistance values: For turbocharged engines 2001, see «Component specifications»(ref-430975-S12681654262011101900000) . For turbocharged engines 2002, see «Component specifications»(ref-430975-S24294221072011101900000) . For turbocharged engines 2003-, see «Component specifications»(ref-430975-S37637200832011101900000) . For B5254T4 2004-, see «Component specifications»(ref-430975-S19541977602011101900000) . For normally aspirated engines 1999-, see «Component specifications»(ref-451848-S36406831262012020900000) To connect the breakout box, see «Connecting the breakout box»(ref-430911-S30587875092011101900000) For information about signals: For turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 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-430995-S20896488722012011100000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430995-S39292240382012011100000) For turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) . To access or replace the throttle unit: For B5xx4T -2001, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S23357003322011101900000) . For B5xx4T 2002-2004, see «Replacing the throttle body (TB)»(ref-430985-S29652099132011101900000) . For B5xx4T 2005-, B5244T5 and B5254T4 do not apply, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S35865188232011101900000) . For B5244T5 2005-, see «Throttle body (electronic throttle module (ETM)), replacing (B5244T5 2005-)»(ref-430995-S29535206622012011100000) .

1. Continue Refer to «Verification»(ref-430995-S08361195052011101900000)

1. Ignition off
2. Check the throttle unit and engine control module (ECM) connectors. Check for contact resistance and oxidation. Check the resistance value of the damper motor winding in the throttle unit. Take readings between throttle unit terminals #1 and #4 (component side). Check for an open-circuit. Check for a short-circuit. NOTE: The resistance of the motor winding in the damper motor is very low. Check the cable (+) for the damper motor between engine control module (ECM) terminal #A35 (#A35) and throttle unit terminal #4 (wiring side). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Check the cable (-) for the damper motor between engine control module (ECM) terminal #A36 (#A36) and throttle unit terminal #1 (wiring side). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Also check the damper motor cables (+) and (-). Check for a short-circuit to each other. Check that the shutter in the throttle unit is not blocked or sticking. Clean as necessary. Remedy as necessary. Other information: See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) To connect the breakout box, see «Connecting the breakout box»(ref-430911-S30587875092011101900000) For resistance values: For turbocharged engines 2001, see «Component specifications»(ref-430975-S12681654262011101900000) . For turbocharged engines 2002, see «Component specifications»(ref-430975-S24294221072011101900000) . For turbocharged engines 2003-, see «Component specifications»(ref-430975-S37637200832011101900000) . For B5254T4 2004-, see «Component specifications»(ref-430975-S19541977602011101900000) . For normally aspirated engines 1999-, see «Component specifications»(ref-451848-S36406831262012020900000) For information about signals: For turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 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-430995-S20896488722012011100000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430995-S39292240382012011100000) For turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) . To access or replace the throttle unit: For B5xx4T -2001, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S23357003322011101900000) . For B5xx4T 2002-2004, see «Replacing the throttle body (TB)»(ref-430985-S29652099132011101900000) . For B5xx4T 2005-, B5244T5 and B5254T4 do not apply, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S35865188232011101900000) . For B5244T5 2005-, see «Throttle body (electronic throttle module (ETM)), replacing (B5244T5 2005-)»(ref-430995-S29535206622012011100000) . To clean the throttle unit: For -2004, see «Throttle body, cleaning»(ref-430964-S10707071812011101900000) For 2005- B5xx4T, does not apply to B5244T5, see «Throttle body (TB), cleaning»(ref-430964-S09703773472011101900000) For 2005- B5244T5, see «Throttle body (TB), cleaning (2005- B5244T5)»(ref-430995-S31105749172012011100000) . To access or replace the engine control module (ECM), see «Engine control module (ECM), replacing»(ref-430961-S10976842282011101900000) .

1. Continue Refer to «Adaptation of the throttle unit»(ref-430995-S27404488562011101900000)

1. Ignition off. Check the throttle unit and engine control module (ECM) connectors. Check for contact resistance and oxidation. Check the resistance values of the potentiometers in the throttle unit and damper motor winding. NOTE: The resistance of the motor winding in the damper motor is very low. Replace the throttle unit if necessary. Check the cable (+) for the damper motor between engine control module (ECM) terminal #A35 (#A35) and throttle unit terminal #4 (wiring side). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Check the cable (-) for the damper motor between engine control module (ECM) terminal #A36 (#A36) and throttle unit terminal #1 (wiring side). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Also check the damper motor cables (+) and (-). Check for a short-circuit to each other. Check that the shutter in the throttle unit is not blocked or sticking. Clean as necessary. The throttle unit is defective if the diagnostic trouble code (DTC) recurs. NOTE: If the throttle unit is replaced it must be adapted. See «Adaptation of the throttle unit»(ref-430995-S00471900652011101900000) Other information: See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) To connect the breakout box, see «Connecting the breakout box»(ref-430911-S30587875092011101900000) For resistance values: For turbocharged engines 2001, see «Component specifications»(ref-430975-S12681654262011101900000) . For turbocharged engines 2002, see «Component specifications»(ref-430975-S24294221072011101900000) . For turbocharged engines 2003-, see «Component specifications»(ref-430975-S37637200832011101900000) . For B5254T4 2004-, see «Component specifications»(ref-430975-S19541977602011101900000) . For normally aspirated engines 1999-, see «Component specifications»(ref-451848-S36406831262012020900000) For information about signals: For turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 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-430995-S20896488722012011100000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430995-S39292240382012011100000) For turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) . To access or replace the throttle unit: For B5xx4T -2001, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S23357003322011101900000) . For B5xx4T 2002-2004, see «Replacing the throttle body (TB)»(ref-430985-S29652099132011101900000) . For B5xx4T 2005-, B5244T5 and B5254T4 do not apply, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S35865188232011101900000) . For B5244T5 2005-, see «Throttle body (electronic throttle module (ETM)), replacing (B5244T5 2005-)»(ref-430995-S29535206622012011100000) . To clean the throttle unit: For -2004, see «Throttle body, cleaning»(ref-430964-S10707071812011101900000) For 2005- B5xx4T, does not apply to B5244T5, see «Throttle body (TB), cleaning»(ref-430964-S09703773472011101900000) For 2005- B5244T5, see «Throttle body (TB), cleaning (2005- B5244T5)»(ref-430995-S31105749172012011100000) .

1. Ignition off
2. Check the throttle unit and engine control module (ECM) connectors. Check for contact resistance and oxidation. Check the resistance value of the damper motor winding in the throttle unit. Take readings between throttle unit terminals #1 and #4 (component side). Check for an open-circuit. Check for a short-circuit. NOTE: The resistance of the motor winding in the damper motor is very low. Replace the throttle unit if necessary. Check the cable (+) for the damper motor between engine control module (ECM) terminal #A35 (#A35) and throttle unit terminal #4 (cable harness side). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Check the cable (-) for the damper motor between engine control module (ECM) terminal #A36 (#A36) and throttle unit terminal #1 (cable harness side). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Also check the damper motor cables (+) and (-). Check for a short-circuit to each other. If no faults are found during the checks and the diagnostic trouble code (DTC) recurs, try replacing the throttle unit. NOTE: When replacing the throttle unit or the engine control module (ECM) the throttle unit must be adapted. See «Adaptation of the throttle unit»(ref-430995-S00471900652011101900000) . Remedy as necessary. Other information: See «Connecting the breakout box»(ref-430911-S30587875092011101900000) For information about signals: For turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 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-430995-S20896488722012011100000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430995-S39292240382012011100000) For turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) . For resistance values: For turbocharged engines 2001, see «Component specifications»(ref-430975-S12681654262011101900000) . For turbocharged engines 2002, see «Component specifications»(ref-430975-S24294221072011101900000) . For turbocharged engines 2003-, see «Component specifications»(ref-430975-S37637200832011101900000) . For B5254T4 2004-, see «Component specifications»(ref-430975-S19541977602011101900000) . For normally aspirated engines 1999-, see «Component specifications»(ref-451848-S36406831262012020900000) To access or replace the throttle unit: For B5xx4T -2001, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S23357003322011101900000) . For B5xx4T 2002-2004, see «Replacing the throttle body (TB)»(ref-430985-S29652099132011101900000) . For B5xx4T 2005-, B5244T5 and B5254T4 do not apply, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S35865188232011101900000) . For B5244T5 2005-, see «Throttle body (electronic throttle module (ETM)), replacing (B5244T5 2005-)»(ref-430995-S29535206622012011100000) . See «Engine control module (ECM), replacing»(ref-430961-S10976842282011101900000) See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

1. Continue Refer to «Verification»(ref-430995-S17646353952011101900000)

1. Ignition off. Check the throttle unit and engine control module (ECM) connectors. Check for contact resistance and oxidation. Check the resistance values of the potentiometers in the throttle unit and damper motor winding. NOTE: The resistance of the motor winding in the damper motor is very low. Replace the throttle unit if necessary. Check the cable (+) for the damper motor between engine control module (ECM) terminal #A35 (#A35) and throttle unit terminal #4 (cable harness side). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Check the cable (-) for the damper motor between engine control module (ECM) terminal #A36 (#A36) and throttle unit terminal #1 (cable harness side). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Also check the damper motor cables (+) and (-). Check for a short-circuit to each other. Check that the shutter in the throttle unit is not blocked or sticking. Clean as necessary. The throttle unit is damaged if the diagnostic trouble code (DTC) recurs. NOTE: If the throttle unit is replaced it must be adapted. See «Adaptation of the throttle unit»(ref-430995-S00471900652011101900000) . Other information: See «Connecting the breakout box»(ref-430911-S30587875092011101900000) For information about signals: For turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 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-430995-S20896488722012011100000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430995-S39292240382012011100000) For turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) . For resistance values: For turbocharged engines 2001, see «Component specifications»(ref-430975-S12681654262011101900000) . For turbocharged engines 2002, see «Component specifications»(ref-430975-S24294221072011101900000) . For turbocharged engines 2003-, see «Component specifications»(ref-430975-S37637200832011101900000) . For B5254T4 2004-, see «Component specifications»(ref-430975-S19541977602011101900000) . For normally aspirated engines 1999-, see «Component specifications»(ref-451848-S36406831262012020900000) To access or replace the throttle unit: For B5xx4T -2001, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S23357003322011101900000) . For B5xx4T 2002-2004, see «Replacing the throttle body (TB)»(ref-430985-S29652099132011101900000) . For B5xx4T 2005-, B5244T5 and B5254T4 do not apply, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S35865188232011101900000) . For B5244T5 2005-, see «Throttle body (electronic throttle module (ETM)), replacing (B5244T5 2005-)»(ref-430995-S29535206622012011100000) . To clean the throttle unit: For -2004, see «Throttle body, cleaning»(ref-430964-S10707071812011101900000) For 2005- B5xx4T, does not apply to B5244T5, see «Throttle body (TB), cleaning»(ref-430964-S09703773472011101900000) For 2005- B5244T5, see «Throttle body (TB), cleaning (2005- B5244T5)»(ref-430995-S31105749172012011100000) . See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

1. Ignition off. Check the throttle unit and engine control module (ECM) connectors. Check for contact resistance and oxidation. Check the resistance values of the potentiometers in the throttle unit and damper motor winding. NOTE: The resistance of the motor winding in the damper motor is very low. Replace the throttle unit if necessary. Check the cable (+) for the damper motor between engine control module (ECM) terminal #A35 (#A35) and throttle unit terminal #4 (cable harness side). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Check the cable (-) for the damper motor between engine control module (ECM) terminal #A36 (#A36) and throttle unit terminal #1 (cable harness side). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Also check the damper motor cables (+) and (-). Check for a short-circuit to each other. Check that the shutter in the throttle unit is not blocked or sticking. Clean as necessary. The throttle unit is damaged if the diagnostic trouble code (DTC) recurs. NOTE: If the throttle unit is replaced it must be adapted. See «Adaptation of the throttle unit»(ref-430995-S00471900652011101900000) . Other information: See «Connecting the breakout box»(ref-430911-S30587875092011101900000) For information about signals: For turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 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-430995-S20896488722012011100000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430995-S39292240382012011100000) For turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) . For resistance values: For turbocharged engines 2001, see «Component specifications»(ref-430975-S12681654262011101900000) . For turbocharged engines 2002, see «Component specifications»(ref-430975-S24294221072011101900000) . For turbocharged engines 2003-, see «Component specifications»(ref-430975-S37637200832011101900000) . For B5254T4 2004-, see «Component specifications»(ref-430975-S19541977602011101900000) . For normally aspirated engines 1999-, see «Component specifications»(ref-451848-S36406831262012020900000) To access or replace the throttle unit: For B5xx4T -2001, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S23357003322011101900000) . For B5xx4T 2002-2004, see «Replacing the throttle body (TB)»(ref-430985-S29652099132011101900000) . For B5xx4T 2005-, B5244T5 and B5254T4 do not apply, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S35865188232011101900000) . For B5244T5 2005-, see «Throttle body (electronic throttle module (ETM)), replacing (B5244T5 2005-)»(ref-430995-S29535206622012011100000) . To clean the throttle unit: For -2004, see «Throttle body, cleaning»(ref-430964-S10707071812011101900000) For 2005- B5xx4T, does not apply to B5244T5, see «Throttle body (TB), cleaning»(ref-430964-S09703773472011101900000) For 2005- B5244T5, see «Throttle body (TB), cleaning (2005- B5244T5)»(ref-430995-S31105749172012011100000) . See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

1. Ignition off. Check the throttle unit and engine control module (ECM) connectors. Check for contact resistance and oxidation. Check the resistance values of the potentiometers in the throttle unit and damper motor winding. NOTE: The resistance of the motor winding in the damper motor is very low. Replace the throttle unit if necessary. Check the cable (+) for the damper motor between engine control module (ECM) terminal #A35 (#A35) and throttle unit terminal #4 (cable harness side). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Check the cable (-) for the damper motor between engine control module (ECM) terminal #A36 (#A36) and throttle unit terminal #1 (cable harness side). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Also check the damper motor cables (+) and (-). Check for a short-circuit to each other. Check that the shutter in the throttle unit is not blocked or sticking. Clean as necessary. The throttle unit is damaged if the diagnostic trouble code (DTC) recurs. NOTE: If the throttle unit is replaced it must be adapted. See «Adaptation of the throttle unit»(ref-430995-S00471900652011101900000) . Other information: See «Connecting the breakout box»(ref-430911-S30587875092011101900000) For information about signals: For turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 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-430995-S20896488722012011100000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430995-S39292240382012011100000) For turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) . For resistance values: For turbocharged engines 2001, see «Component specifications»(ref-430975-S12681654262011101900000) . For turbocharged engines 2002, see «Component specifications»(ref-430975-S24294221072011101900000) . For turbocharged engines 2003-, see «Component specifications»(ref-430975-S37637200832011101900000) . For B5254T4 2004-, see «Component specifications»(ref-430975-S19541977602011101900000) . For normally aspirated engines 1999-, see «Component specifications»(ref-451848-S36406831262012020900000) To access or replace the throttle unit: For B5xx4T -2001, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S23357003322011101900000) . For B5xx4T 2002-2004, see «Replacing the throttle body (TB)»(ref-430985-S29652099132011101900000) . For B5xx4T 2005-, B5244T5 and B5254T4 do not apply, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S35865188232011101900000) . For B5244T5 2005-, see «Throttle body (electronic throttle module (ETM)), replacing (B5244T5 2005-)»(ref-430995-S29535206622012011100000) . To clean the throttle unit: For -2004, see «Throttle body, cleaning»(ref-430964-S10707071812011101900000) For 2005- B5xx4T, does not apply to B5244T5, see «Throttle body (TB), cleaning»(ref-430964-S09703773472011101900000) For 2005- B5244T5, see «Throttle body (TB), cleaning (2005- B5244T5)»(ref-430995-S31105749172012011100000) . See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

1. Ignition off. Check the throttle unit and engine control module (ECM) connectors. Check for contact resistance and oxidation. Check the resistance values of the potentiometers in the throttle unit and damper motor winding. NOTE: The resistance of the motor winding in the damper motor is very low. Replace the throttle unit if necessary. Check the cable (+) for the damper motor between engine control module (ECM) terminal #A35 (#A35) and throttle unit terminal #4 (cable harness side). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Check the cable (-) for the damper motor between engine control module (ECM) terminal #A36 (#A36) and throttle unit terminal #1 (cable harness side). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Also check the damper motor cables (+) and (-). Check for a short-circuit to each other. Check that the shutter in the throttle unit is not blocked or sticking. Clean as necessary. The throttle unit is damaged if the diagnostic trouble code (DTC) recurs. NOTE: If the throttle unit is replaced it must be adapted. See «Adaptation of the throttle unit»(ref-430995-S00471900652011101900000) . Other information: See «Connecting the breakout box»(ref-430911-S30587875092011101900000) For information about signals: For turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 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-430995-S20896488722012011100000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430995-S39292240382012011100000) For turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) . For resistance values: For turbocharged engines 2001, see «Component specifications»(ref-430975-S12681654262011101900000) . For turbocharged engines 2002, see «Component specifications»(ref-430975-S24294221072011101900000) . For turbocharged engines 2003-, see «Component specifications»(ref-430975-S37637200832011101900000) . For B5254T4 2004-, see «Component specifications»(ref-430975-S19541977602011101900000) . For normally aspirated engines 1999-, see «Component specifications»(ref-451848-S36406831262012020900000) To access or replace the throttle unit: For B5xx4T -2001, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S23357003322011101900000) . For B5xx4T 2002-2004, see «Replacing the throttle body (TB)»(ref-430985-S29652099132011101900000) . For B5xx4T 2005-, B5244T5 and B5254T4 do not apply, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S35865188232011101900000) . For B5244T5 2005-, see «Throttle body (electronic throttle module (ETM)), replacing (B5244T5 2005-)»(ref-430995-S29535206622012011100000) . To clean the throttle unit: For -2004, see «Throttle body, cleaning»(ref-430964-S10707071812011101900000) For 2005- B5xx4T, does not apply to B5244T5, see «Throttle body (TB), cleaning»(ref-430964-S09703773472011101900000) For 2005- B5244T5, see «Throttle body (TB), cleaning (2005- B5244T5)»(ref-430995-S31105749172012011100000) . See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

1. Ignition off. Check the throttle unit and engine control module (ECM) connectors. Check for contact resistance and oxidation. Check the resistance values of the potentiometers in the throttle unit and damper motor winding. NOTE: The resistance of the motor winding in the damper motor is very low. Replace the throttle unit if necessary. Check the cable (+) for the damper motor between engine control module (ECM) terminal #A35 (#A35) and throttle unit terminal #4 (cable harness side). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Check the cable (-) for the damper motor between engine control module (ECM) terminal #A36 (#A36) and throttle unit terminal #1 (cable harness side). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Also check the damper motor cables (+) and (-). Check for a short-circuit to each other. Check that the shutter in the throttle unit is not blocked or sticking. Clean as necessary. The throttle unit is damaged if the diagnostic trouble code (DTC) recurs. NOTE: If the throttle unit is replaced it must be adapted. See «Adaptation of the throttle unit»(ref-430995-S00471900652011101900000) . Other information: See «Connecting the breakout box»(ref-430911-S30587875092011101900000) For information about signals: For turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 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-430995-S20896488722012011100000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430995-S39292240382012011100000) For turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) . For resistance values: For turbocharged engines 2001, see «Component specifications»(ref-430975-S12681654262011101900000) . For turbocharged engines 2002, see «Component specifications»(ref-430975-S24294221072011101900000) . For turbocharged engines 2003-, see «Component specifications»(ref-430975-S37637200832011101900000) . For B5254T4 2004-, see «Component specifications»(ref-430975-S19541977602011101900000) . For normally aspirated engines 1999-, see «Component specifications»(ref-451848-S36406831262012020900000) To access or replace the throttle unit: For B5xx4T -2001, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S23357003322011101900000) . For B5xx4T 2002-2004, see «Replacing the throttle body (TB)»(ref-430985-S29652099132011101900000) . For B5xx4T 2005-, B5244T5 and B5254T4 do not apply, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S35865188232011101900000) . For B5244T5 2005-, see «Throttle body (electronic throttle module (ETM)), replacing (B5244T5 2005-)»(ref-430995-S29535206622012011100000) . To clean the throttle unit: For -2004, see «Throttle body, cleaning»(ref-430964-S10707071812011101900000) For 2005- B5xx4T, does not apply to B5244T5, see «Throttle body (TB), cleaning»(ref-430964-S09703773472011101900000) For 2005- B5244T5, see «Throttle body (TB), cleaning (2005- B5244T5)»(ref-430995-S31105749172012011100000) . See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

1. Ignition off. Check the throttle unit and engine control module (ECM) connectors. Check for contact resistance and oxidation. Check the resistance values of the potentiometers in the throttle unit. Check that the shutter in the throttle unit is not blocked or sticking. Clean as necessary. Check the function of the integrated return spring in the throttle unit by carefully manually turning the throttle to wide open position and then carefully releasing the throttle. Check that the return spring returns the shutter to its resting position. If the return spring does not return the shutter, the throttle unit is damaged. Remedy as necessary. Other information: For information about signals: For turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 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-430995-S20896488722012011100000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430995-S39292240382012011100000) For turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) . For resistance values: For turbocharged engines 2001, see «Component specifications»(ref-430975-S12681654262011101900000) . For turbocharged engines 2002, see «Component specifications»(ref-430975-S24294221072011101900000) . For turbocharged engines 2003-, see «Component specifications»(ref-430975-S37637200832011101900000) . For B5254T4 2004-, see «Component specifications»(ref-430975-S19541977602011101900000) . For normally aspirated engines 1999-, see «Component specifications»(ref-451848-S36406831262012020900000) To access or replace the throttle unit: For B5xx4T -2001, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S23357003322011101900000) . For B5xx4T 2002-2004, see «Replacing the throttle body (TB)»(ref-430985-S29652099132011101900000) . For B5xx4T 2005-, B5244T5 and B5254T4 do not apply, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S35865188232011101900000) . For B5244T5 2005-, see «Throttle body (electronic throttle module (ETM)), replacing (B5244T5 2005-)»(ref-430995-S29535206622012011100000) . To clean the throttle unit: For -2004, see «Throttle body, cleaning»(ref-430964-S10707071812011101900000) For 2005- B5xx4T, does not apply to B5244T5, see «Throttle body (TB), cleaning»(ref-430964-S09703773472011101900000) For 2005- B5244T5, see «Throttle body (TB), cleaning (2005- B5244T5)»(ref-430995-S31105749172012011100000) . See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

1. Continue Refer to «Adaptation of the throttle unit»(ref-430995-S00471900652011101900000)

1. Ignition off
2. Check the throttle unit and engine control module (ECM) connectors. Check for contact resistance and oxidation. Check the resistance value of the damper motor winding in the throttle unit. Take readings between throttle unit terminals #1 and #4 (component side). Check for an open-circuit. Check for a short-circuit. NOTE: The resistance of the motor winding in the damper motor is very low. Check the cable (+) for the damper motor between engine control module (ECM) terminal #A35 (#A35) and throttle unit terminal #4 (cable harness side). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Check the cable (-) for the damper motor between engine control module (ECM) terminal #A36 (#A36) and throttle unit terminal #1 (cable harness side). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Also check the damper motor cables (+) and (-). Check for a short-circuit to each other. Check that the shutter in the throttle unit is not blocked or sticking. Clean as necessary. Remedy as necessary. Other information: See «Connecting the breakout box»(ref-430911-S30587875092011101900000) For information about signals: For turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 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-430995-S20896488722012011100000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430995-S39292240382012011100000) For turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) . For resistance values: For turbocharged engines 2001, see «Component specifications»(ref-430975-S12681654262011101900000) . For turbocharged engines 2002, see «Component specifications»(ref-430975-S24294221072011101900000) . For turbocharged engines 2003-, see «Component specifications»(ref-430975-S37637200832011101900000) . For B5254T4 2004-, see «Component specifications»(ref-430975-S19541977602011101900000) . For normally aspirated engines 1999-, see «Component specifications»(ref-451848-S36406831262012020900000) To access or replace the throttle unit: For B5xx4T -2001, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S23357003322011101900000) . For B5xx4T 2002-2004, see «Replacing the throttle body (TB)»(ref-430985-S29652099132011101900000) . For B5xx4T 2005-, B5244T5 and B5254T4 do not apply, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S35865188232011101900000) . For B5244T5 2005-, see «Throttle body (electronic throttle module (ETM)), replacing (B5244T5 2005-)»(ref-430995-S29535206622012011100000) . To clean the throttle unit: For -2004, see «Throttle body, cleaning»(ref-430964-S10707071812011101900000) For 2005- B5xx4T, does not apply to B5244T5, see «Throttle body (TB), cleaning»(ref-430964-S09703773472011101900000) For 2005- B5244T5, see «Throttle body (TB), cleaning (2005- B5244T5)»(ref-430995-S31105749172012011100000) . See «Engine control module (ECM), replacing»(ref-430961-S10976842282011101900000) See «Checking wiring and terminals»(ref-430909-S26456997912011101900000)

1. Continue Refer to «Adaptation of the throttle unit»(ref-430995-S00226318172011101900000)

1. Ignition off
2. Check the throttle unit and engine control module (ECM) connectors. Check for contact resistance and oxidation. Check the resistance value of the damper motor winding in the throttle unit. Take readings between throttle unit terminals #1 and #4 (component side). Check for an open-circuit. Check for a short-circuit. NOTE: The resistance of the motor winding in the damper motor is very low. Check the cable (+) for the damper motor between engine control module (ECM) terminal #A35 (#A35) and throttle unit terminal #4 (cable harness side). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Check the cable (-) for the damper motor between engine control module (ECM) terminal #A36 (#A36) and throttle unit terminal #1 (cable harness side). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Also check the damper motor cables (+) and (-). Check for a short-circuit to each other. Check that the shutter in the throttle unit is not blocked or sticking. Clean as necessary. Remedy as necessary. Other information: See «Connecting the breakout box»(ref-430911-S30587875092011101900000) For information about signals: For turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 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-430995-S20896488722012011100000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430995-S39292240382012011100000) For turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) . For resistance values: For turbocharged engines 2001, see «Component specifications»(ref-430975-S12681654262011101900000) . For turbocharged engines 2002, see «Component specifications»(ref-430975-S24294221072011101900000) . For turbocharged engines 2003-, see «Component specifications»(ref-430975-S37637200832011101900000) . For B5254T4 2004-, see «Component specifications»(ref-430975-S19541977602011101900000) . For normally aspirated engines 1999-, see «Component specifications»(ref-451848-S36406831262012020900000) To access or replace the throttle unit: For B5xx4T -2001, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S23357003322011101900000) . For B5xx4T 2002-2004, see «Replacing the throttle body (TB)»(ref-430985-S29652099132011101900000) . For B5xx4T 2005-, B5244T5 and B5254T4 do not apply, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S35865188232011101900000) . For B5244T5 2005-, see «Throttle body (electronic throttle module (ETM)), replacing (B5244T5 2005-)»(ref-430995-S29535206622012011100000) . To clean the throttle unit: For -2004, see «Throttle body, cleaning»(ref-430964-S10707071812011101900000) For 2005- B5xx4T, does not apply to B5244T5, see «Throttle body (TB), cleaning»(ref-430964-S09703773472011101900000) For 2005- B5244T5, see «Throttle body (TB), cleaning (2005- B5244T5)»(ref-430995-S31105749172012011100000) . See «Engine control module (ECM), replacing»(ref-430961-S10976842282011101900000) See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

1. Continue Refer to «Adaptation of the throttle unit»(ref-430995-S08235926812011101900000)

1. Ignition off
2. Check the throttle unit and engine control module (ECM) connectors. Check for contact resistance and oxidation. Check the resistance value of the damper motor winding in the throttle unit. Take readings between throttle unit terminals #1 and #4 (component side). Check for an open-circuit. Check for a short-circuit. NOTE: The resistance of the motor winding in the damper motor is very low. Check the cable (+) for the damper motor between engine control module (ECM) terminal #A35 (#A35) and throttle unit terminal #4 (cable harness side). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Check the cable (-) for the damper motor between engine control module (ECM) terminal #A36 (#A36) and throttle unit terminal #1 (cable harness side). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Also check the damper motor cables (+) and (-). Check for a short-circuit to each other. Check that the shutter in the throttle unit is not blocked or sticking. Clean as necessary. Remedy as necessary. Other information: See «Connecting the breakout box»(ref-430911-S30587875092011101900000) For information about signals: For turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 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-430995-S20896488722012011100000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430995-S39292240382012011100000) For turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) . For resistance values: For turbocharged engines 2001, see «Component specifications»(ref-430975-S12681654262011101900000) . For turbocharged engines 2002, see «Component specifications»(ref-430975-S24294221072011101900000) . For turbocharged engines 2003-, see «Component specifications»(ref-430975-S37637200832011101900000) . For B5254T4 2004-, see «Component specifications»(ref-430975-S19541977602011101900000) . For normally aspirated engines 1999-, see «Component specifications»(ref-451848-S36406831262012020900000) To access or replace the throttle unit: For B5xx4T -2001, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S23357003322011101900000) . For B5xx4T 2002-2004, see «Replacing the throttle body (TB)»(ref-430985-S29652099132011101900000) . For B5xx4T 2005-, B5244T5 and B5254T4 do not apply, see «Throttle body (electronic throttle module (ETM)), replacing»(ref-430985-S35865188232011101900000) . For B5244T5 2005-, see «Throttle body (electronic throttle module (ETM)), replacing (B5244T5 2005-)»(ref-430995-S29535206622012011100000) . To clean the throttle unit: For -2004, see «Throttle body, cleaning»(ref-430964-S10707071812011101900000) For 2005- B5xx4T, does not apply to B5244T5, see «Throttle body (TB), cleaning»(ref-430964-S09703773472011101900000) For 2005- B5244T5, see «Throttle body (TB), cleaning (2005- B5244T5)»(ref-430995-S31105749172012011100000) . See «Engine control module (ECM), replacing»(ref-430961-S10976842282011101900000) See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) .

1. Continue Refer to «Adaptation of the throttle unit»(ref-430995-S05221524552011101900000)

1. Ignition off. Check the resistance of the clutch pedal sensor between terminals #2 and #4 (component side). Check the clutch pedal sensor and engine control module (ECM) connectors. Check for contact resistance and oxidation. Check the signal cable between engine control module (ECM) terminal #B15 (#B25) and clutch pedal sensor terminal #2 (component side). Check for an open-circuit. Check the signal ground cable between engine control module (ECM) terminal #B4 (#B14) and clutch pedal sensor terminal #4 (wiring side). Check for an open-circuit. Check the clutch pedal sensor installation. Search for damage and check the connections visually. HINT: With the ignition on, the power supply to the clutch pedal sensor must be approximately 5 V (measured with the clutch pedal sensor disconnected), measured between terminals #2 and #4 (wiring side). Remedy as necessary. Other information: See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) To connect the breakout box, see «Connecting the breakout box»(ref-430911-S30587875092011101900000) To access or replace the clutch pedal sensor, see «Pedal position sensor clutch, replacing»(ref-430995-S16834881982012011100000) For resistance values: For turbocharged engines 2001, see «Component specifications»(ref-430975-S12681654262011101900000) . For turbocharged engines 2002, see «Component specifications»(ref-430975-S24294221072011101900000) . For turbocharged engines 2003-, see «Component specifications»(ref-430975-S37637200832011101900000) . For B5254T4 2004-, see «Component specifications»(ref-430975-S19541977602011101900000) . For normally aspirated engines 1999-, see «Component specifications»(ref-451848-S36406831262012020900000) For information about signals: For turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 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-430995-S20896488722012011100000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430995-S39292240382012011100000) For turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .

1. Continue Refer to «Verification»(ref-430995-S11050014232011101900000)

1. Ignition off
2. Check the resistance of the clutch pedal sensor between terminals #2 and #4 (component side). Check the clutch pedal sensor and engine control module (ECM) connectors. Check for contact resistance and oxidation. Check the signal cable between engine control module (ECM) terminal #B15 (#B25) and clutch pedal sensor terminal #2 (component side). Check for an open-circuit. Check for a short-circuit to supply voltage. Check the signal ground cable between engine control module (ECM) terminal #B4 (#B14) and clutch pedal sensor terminal #4 (wiring side). Check for an open-circuit. HINT: With the ignition on, the power supply to the clutch pedal sensor must be approximately 5 V (measured with the clutch pedal sensor disconnected), measured between terminals #2 and #4 (wiring side). Remedy as necessary Other information: See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) To connect the breakout box, see «Connecting the breakout box»(ref-430911-S30587875092011101900000) To access or replace the clutch pedal sensor, see «Pedal position sensor clutch, replacing»(ref-430995-S16834881982012011100000) For resistance values: For turbocharged engines 2001, see «Component specifications»(ref-430975-S12681654262011101900000) . For turbocharged engines 2002, see «Component specifications»(ref-430975-S24294221072011101900000) . For turbocharged engines 2003-, see «Component specifications»(ref-430975-S37637200832011101900000) . For B5254T4 2004-, see «Component specifications»(ref-430975-S19541977602011101900000) . For normally aspirated engines 1999-, see «Component specifications»(ref-451848-S36406831262012020900000) For information about signals: For turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 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-430995-S20896488722012011100000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430995-S39292240382012011100000) For turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .

1. Continue Refer to «Verification»(ref-430995-S13446101702011101900000)

1. Ignition off. Check the resistance of the clutch pedal sensor between terminals #2 and #4 (component side). Check the signal cable between engine control module (ECM) terminal #B15 (#B25) and clutch pedal sensor terminal #2 (wiring side). Check for a short-circuit to ground. HINT: With the ignition on, the power supply to the clutch pedal sensor must be approximately 5 V (measured with the clutch pedal sensor disconnected), measured between terminals #2 and #4 (wiring side). Remedy as necessary. Other information: See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) To connect the breakout box, see «Connecting the breakout box»(ref-430911-S30587875092011101900000) To access or replace the clutch pedal sensor, see «Pedal position sensor clutch, replacing»(ref-430995-S16834881982012011100000) For resistance values: For turbocharged engines 2001, see «Component specifications»(ref-430975-S12681654262011101900000) . For turbocharged engines 2002, see «Component specifications»(ref-430975-S24294221072011101900000) . For turbocharged engines 2003-, see «Component specifications»(ref-430975-S37637200832011101900000) . For B5254T4 2004-, see «Component specifications»(ref-430975-S19541977602011101900000) . For normally aspirated engines 1999-, see «Component specifications»(ref-451848-S36406831262012020900000) For information about signals: For turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 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-430995-S20896488722012011100000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430995-S39292240382012011100000) For turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .

1. Continue Refer to «Verification»(ref-430995-S36235194432011101900000)

Checking component and wiring

Faulty signal Permanent or intermittent fault.

For markets where the upgraded software, released during 2006 or later, is available, the solution may be to load the upgraded software. It is no longer necessary to store a diagnostic trouble code for this type of fault. Thus, this fault type has been disabled in the upgraded software.

For other markets, check the brake pedal position sensor's attachment, cables and connectors for contact resistance and oxidation. Check that the brake pedal position sensor has the right resistance.

HINT: Using VIDA vehicle communication, check that the parameters "Brake pedal position, volts" and "Brake light switch" indicate correct values. To aid fault tracing, use Component specifications when measuring and checking relevant components and use Wiring diagram, Signal description and Breakout box to measure and control signals to and front the control module or its components.

Remedy as necessary.

Other information

1. To access/replace the brake pedal sensor, see «Pedal sensor power brake booster, replacing»(ref-430995-S17046203172012011200000) .
2. For information about signals: For turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 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-430995-S20896488722012011100000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430995-S39292240382012011100000) For turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) .
3. For the resistance values, see «Brake pedal sensor resistance values»(ref-430995-S37010309442012011200000) .
4. See «Identifying upgraded software ECM/ETM»(ref-430995-S36282700162012011100000)
5. See «Checking wiring and terminals»(ref-430909-S05889726072011101900000)

1. Ignition off, wait three minutes so that the main relay / system relay releases the voltage feed to, among other, Electronic throttle module (ETM).
2. Then turn on the ignition and turn it off again.
3. Wait another three minutes, but if the electric cooling fan is running you have to wait another two minutes after the cooling fan has stopped, to ensure that Electronic throttle module (ETM) is shut off correctly.

If this is not done correctly, diagnostic trouble codes may remain even after deleting diagnostic trouble codes and any reconfiguration may remain, despite the problem being fixed.

1. Ignition off
2. Check that the brake light switch is installed correctly and adjusted. Check the connectors for the brake light switch and engine control module (ECM) for contact resistance or oxidation and for damage to pins and connections. Check the connectors and terminals for water penetration. Check the cable between the brake light switch #5 (against cable harness) and engine control module (ECM) #B26 (#B36) for open circuit or short-circuit to ground or short-circuit to voltage. Check connector B for central electronic module (CEM) for contact resistance or oxidation. Check the cable between the brake light switch #5 (against cable harness) and central electronic module (CEM) #4B for open circuit, short-circuit to ground or short-circuit to voltage. Remedy as necessary. Other information: See «Checking wiring and terminals»(ref-430909-S26456997912011101900000) . For information about cable routing and connections, see the appropriate Wiring Diagram. For resistance values: For turbocharged engines 2001, see «Component specifications»(ref-430975-S12681654262011101900000) . For turbocharged engines 2002, see «Component specifications»(ref-430975-S24294221072011101900000) . For turbocharged engines 2003-, see «Component specifications»(ref-430975-S37637200832011101900000) . For B5254T4 2004-, see «Component specifications»(ref-430975-S19541977602011101900000) . For normally aspirated engines 1999-, see «Component specifications»(ref-451848-S36406831262012020900000) To connect the breakout box, see «Connecting the breakout box»(ref-430911-S30587875092011101900000) . For information about signals: For turbocharged engines -2001, see «Signal specification»(ref-430975-S34273110602011101900000) For 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-430995-S20896488722012011100000) For B5254T4 2004, see «Signal specification (B5254T4 2004)»(ref-430995-S39292240382012011100000) For turbocharged engines 2005-, see «Signal specification»(ref-430975-S24350024032011101900000) . Checking brake light switch adjustment: «Checking brake light switch adjustment»(ref-430998-S32206498532011101900000) . To access/replace central electronic module (CEM), see «Central electronic module (CEM), replacing»(ref-430924-S13972874222011101900000) .

1. Continue Refer to «Verification»(ref-430995-S21842506772011101900000)