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Contents Section: Testing & Diagnostics All sections

Engine Control Module (ECM) Diagnostic Trouble Codes - 8 of 9: Wiring Volvo V50 I рестайлинг

Testing & Diagnostics 1 illustration ~5410 words

CHECKING THE WIRING

The diagnostic trouble code (DTC) is stored if there is no communication between the engine control module (ECM) and the alternator control module (ACM). This may be due to a fault in the signal cable between the control modules or a damaged communication device in one or both of the control modules.

HINT: This diagnostic trouble code (DTC) can be stored if a generator (GEN) with an alternator control module (ACM) (charge regulator) not intended for LIN communication is installed.

Check the connector on the alternator control module (ACM). Check for contact resistance and oxidation.

Check the signal cable. Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.

Take readings between

  1. Engine control module (ECM) terminal #A21 (#A21) and alternator control module (ACM) terminal #B1.

Remedy as necessary.

Other information

  1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
  2. see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000)
  3. see «CONTENTS»(ref-466589-S05251896242012042500000)
  4. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)

Was a fault detected?

  1. YES Refer to «INFORMATION»(ref-466671-S39824465432012042500000)
  2. NO Refer to «REPLACING THE CONTROL MODULE»(ref-466671-S05301066582012042500000)

CHECKING THE COMPONENTS AND WIRING

Note. If diagnostic trouble codes (DTCs) have been stored for a component that is supplied with 5 volt in the engine control module (ECM), these diagnostic trouble codes (DTCs) must be fault-traced first.

Check the power supply cables between engine control module (ECM) terminals #A13 (#A13), #A14 (#A14), #A15 (#A15), #A16 (#A16), A17 (#A17), #A39 (#A39) and #B31 (#C31). Check the components connected to these power supply cables. Check for a short-circuit to supply voltage.

Remedy as necessary.

HINT: This diagnostic trouble code (DTC) can also be caused by an internal fault in the engine control module (ECM).

Other information

  1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
  2. see «SIGNAL SPECIFICATION»(ref-466592-S15475582172012042500000)
  3. see «ENGINE CONTROL MODULE (ECM)»(ref-466594-S40317974462012042500000)
  4. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466671-S27962116822012042500000)

Note. If diagnostic trouble codes (DTCs) have been stored for a component that is supplied with 5 volt in the engine control module (ECM), these diagnostic trouble codes (DTCs) must be fault-traced first.

Check the power supply cables between engine control module (ECM) terminals #A13 (#A13), #A14 (#A14), #A15 (#A15), #A16 (#A16), A17 (#A17), #A39 (#A39) and #B31 (#C31). Check the components connected to these power supply cables. Check for a short-circuit to supply voltage.

Remedy as necessary.

HINT: This diagnostic trouble code (DTC) can also be caused by an internal fault in the engine control module (ECM).

Other information

  1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
  2. see «SIGNAL SPECIFICATION»(ref-466592-S26583508152012042500000)
  3. see «ENGINE CONTROL MODULE (ECM)»(ref-466594-S40317974462012042500000)
  4. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466671-S28130771312012042500000)

Note. If diagnostic trouble codes (DTCs) have been stored for a component that is supplied with 5 volt in the engine control module (ECM), these diagnostic trouble codes (DTCs) must be fault-traced first.

Check the power supply cables between engine control module (ECM) terminals #A13 (#A13), #A14 (#A14), #A15 (#A15), #A16 (#A16), A17 (#A17), #A39 (#A39) and #B31 (#C31), and components connected to these power supply cables. Check for a short-circuit to ground.

Remedy as necessary.

HINT: This diagnostic trouble code (DTC) can also be caused by an internal fault in the engine control module (ECM).

Other information

  1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
  2. see «SIGNAL SPECIFICATION»(ref-466592-S15475582172012042500000)
  3. see «ENGINE CONTROL MODULE (ECM)»(ref-466594-S40317974462012042500000)
  4. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466671-S09672276192012042500000)

Note. If diagnostic trouble codes (DTCs) have been stored for a component that is supplied with 5 volt in the engine control module (ECM), these diagnostic trouble codes (DTCs) must be fault-traced first.

Check the power supply cables between engine control module (ECM) terminals #A13 (#A13), #A14 (#A14), #A15 (#A15), #A16 (#A16), A17 (#A17), #A39 (#A39) and #B31 (#C31), and components connected to these power supply cables. Check for a short-circuit to ground.

Remedy as necessary.

HINT: This diagnostic trouble code (DTC) can also be caused by an internal fault in the engine control module (ECM).

Other information

  1. see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000)
  2. see «SIGNAL SPECIFICATION»(ref-466592-S26583508152012042500000)
  3. see «ENGINE CONTROL MODULE (ECM)»(ref-466594-S40317974462012042500000)
  4. see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466671-S18685779992012042500000)

CHECKING THE COMPONENT AND WIRING

  1. Check the condition of the battery and the function of the charging system. Check the voltage feed to the Engine control module (ECM). Check between Engine control module (ECM) #B16 (#C16) and the battery's plus terminal for contact resistance or oxidation in connections. Check the voltage feed to the start relay. Check between the start relay and the battery's plus terminal for contact resistance or oxidation in connections. Check the power supply to the starter motor. Check between the starter motor and the battery's plus terminal for contact resistance or oxidation in connections. Check between the starter motor and start relay for contact resistance or oxidation in connections. Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) see «COMPONENT SPECIFICATIONS»(ref-466592-S02390340522012042500000) see «CONTENTS»(ref-466589-S05251896242012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466671-S02443478332012042500000)
  1. Ignition off.
  2. Check the connectors. Check for loose connections. Check for contact resistance. Check for oxidation. Check the signal cable. Check for an open-circuit. Check for a short-circuit to ground. Take readings between: Engine Control Module (ECM) #B9 (#C9) and starter motor relay #2. Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) see «CONTENTS»(ref-466589-S05251896242012042500000)
  1. Continue Refer to «INFORMATION»(ref-466671-S01342400572012042500000)
  1. Ignition off. Check connections and cables between the engine control module (ECM) and starter relay for open circuits and loose connections. If no fault is found, try a new starter relay. Other information see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)
  1. Continue Refer to «INFORMATION»(ref-466671-S05118738562012042500000)
  1. Ignition off.
  2. Check the connectors. Check for loose connections. Check for contact resistance. Check for oxidation. Check the signal cable. Check for a short-circuit to supply voltage. Take readings between: Engine Control Module (ECM) #B11 (#C11) and starter motor relay #1. Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) see «CONTENTS»(ref-466589-S05251896242012042500000)
  1. Continue Refer to «INFORMATION»(ref-466671-S16539401862012042500000)
  1. Ignition off.
  2. Check the connectors. Check for loose connections. Check for contact resistance. Check for oxidation. Check the signal cable. Check for an open-circuit. Check for a short-circuit to ground. Take readings between: Engine Control Module (ECM) #B11 (#C11) and starter motor relay #1. Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) see «CONTENTS»(ref-466589-S05251896242012042500000)
  1. Continue Refer to «INFORMATION»(ref-466671-S36355507172012042500000)
  1. Ignition off
  2. Check that the stop lamp switch is correctly installed. Check the resistance of the stop lamp switch with the switch pressed in and with the switch released. Take readings between terminals #1 and #2 (component side) on the stop lamp switch. HINT: The stop lamp switch must be closed when the brake pedal is depressed. The resistance of the stop lamp switch must be infinite when the brake pedal is unaffected. Check the stop lamp switch and engine control module (ECM) connectors. Check for contact resistance. Check for oxidation. Check the cable. Check for loose connections. Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Take readings between: Engine Control Module (ECM) #B30 (#C30) and brake light switch #1. Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466671-S10458314132012042500000)

CHECKING THE COMPONENT, WIRING AND CONNECTORS

Check the clutch pedal switch's cable and function by measuring between Engine control module (ECM) #B13 (#C13) and ground (chassis connection).

Remedy as necessary.

Other information

  1. see «CONTENTS»(ref-466589-S05251896242012042500000)
  2. see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000)

Scheme 207

Scheme 207
Scheme 207
  1. Continue Refer to «VERIFICATION»(ref-466671-S21893405352012042500000)
  1. Ignition off
  2. Check the throttle unit and engine control module (ECM) connectors. Check for contact resistance and oxidation. Check the signal cable (position sensor 1) between engine control module (ECM) terminal #A96 (#B36) and throttle unit terminal #6 (wiring side). Check for an open-circuit. Check the signal cable (position sensor 2) between engine control module (ECM) terminal #A72 (#B12) and throttle unit terminal #4 (cable harness side). Check for an open-circuit. HINT: With the ignition on, the power supply to the throttle unit position sensor must be approximately 5 V measured between throttle unit connector terminals #3 and #5 (wiring side). If no faults are found and the diagnostic trouble code (DTC) recurs, try replacing the throttle unit. Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S26583508152012042500000) see «THROTTLE BODY»(ref-466651-S01198376532012042500000) see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466671-S19927319792012042500000)
  1. Ignition off. Check the throttle unit and engine control module (ECM) connectors. Check for contact resistance and oxidation. Check the signal ground cable between engine control module (ECM) terminal #A24 (#A24) and throttle unit terminal #3 (wiring side). Check for an open-circuit. Check for a short-circuit to supply voltage. Check the power supply cable (5 V) between engine control module (ECM) terminal #A15 (#A15) and throttle unit terminal #5 (cable harness side). Check for a short-circuit to battery voltage. HINT: With the ignition on, the power supply to the throttle unit position sensor must be approximately 5 V measured between throttle unit connector terminals #3 and #5 (wiring side). Check the signal cable (position sensor 1) between engine control module (ECM) terminal #A96 (#B36) and throttle unit terminal #6 (wiring side). Check for a short-circuit to supply voltage. Check the signal cable (position sensor 2) between engine control module (ECM) terminal #A72 (#B12) and throttle unit terminal #4 (cable harness side). Check for a short-circuit to supply voltage. If no faults are found and the diagnostic trouble code (DTC) recurs, try replacing the throttle unit. Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S15475582172012042500000) see «THROTTLE BODY»(ref-466651-S01198376532012042500000) see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466671-S28133807372012042500000)
  1. Ignition off. Check the throttle unit and engine control module (ECM) connectors. Check for contact resistance and oxidation. Check the signal ground cable between engine control module (ECM) terminal #A24 (#A24) and throttle unit terminal #3 (wiring side). Check for an open-circuit. Check for a short-circuit to supply voltage. Check the power supply cable (5 V) between engine control module (ECM) terminal #A15 (#A15) and throttle unit terminal #5 (cable harness side). Check for a short-circuit to battery voltage. HINT: With the ignition on, the power supply to the throttle unit position sensor must be approximately 5 V measured between throttle unit connector terminals #3 and #5 (wiring side). Check the signal cable (position sensor 1) between engine control module (ECM) terminal #A96 (#B36) and throttle unit terminal #6 (wiring side). Check for a short-circuit to supply voltage. Check the signal cable (position sensor 2) between engine control module (ECM) terminal #A72 (#B12) and throttle unit terminal #4 (cable harness side). Check for a short-circuit to supply voltage. If no faults are found and the diagnostic trouble code (DTC) recurs, try replacing the throttle unit. Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S26583508152012042500000) see «THROTTLE BODY»(ref-466651-S01198376532012042500000) see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466671-S34959146592012042500000)
  1. Ignition off. Check the throttle unit and engine control module (ECM) connectors. Check for contact resistance and oxidation. Check the power supply cable (5 V) between engine control module (ECM) terminal #A15 (#A15) and throttle unit terminal #5 (cable harness 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 position sensor must be approximately 5 V measured between throttle unit connector terminals #3 and #5 (cable harness side). Check the signal cable (position sensor 1) between engine control module (ECM) terminal #A96 (#B36) and throttle unit terminal #6 (cable harness side). Check for an open-circuit. Check for a short-circuit to ground. Check the signal cable (position sensor 2) between engine control module (ECM) terminal #A72 (#B12) and throttle unit terminal #4 (cable harness side). Check for an open-circuit. Check for a short-circuit to ground. If no faults are found and the diagnostic trouble code (DTC) recurs, try replacing the throttle unit. Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S15475582172012042500000) see «THROTTLE BODY»(ref-466651-S01198376532012042500000) see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466671-S01317106912012042500000)
  1. Ignition off. Check the throttle unit and engine control module (ECM) connectors. Check for contact resistance and oxidation. Check the power supply cable (5 V) between engine control module (ECM) terminal #A15 (#A15) and throttle unit terminal #5 (cable harness 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 position sensor must be approximately 5 V measured between throttle unit connector terminals #3 and #5 (cable harness side). Check the signal cable (position sensor 1) between engine control module (ECM) terminal #A96 (#B36) and throttle unit terminal #6 (cable harness side). Check for an open-circuit. Check for a short-circuit to ground. Check the signal cable (position sensor 2) between engine control module (ECM) terminal #A72 (#B12) and throttle unit terminal #4 (cable harness side). Check for an open-circuit. Check for a short-circuit to ground. If no faults are found and the diagnostic trouble code (DTC) recurs, try replacing the throttle unit. Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S26583508152012042500000) see «THROTTLE BODY»(ref-466651-S01198376532012042500000) see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466671-S37584215562012042500000)
  1. Ignition off. 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 #2 (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 damper motor cable (+) between throttle unit terminal #1 and engine control module (ECM) terminal #A75 (#B15). Check for an open circuit. Check for a short circuit to supply voltage. Check for a short-circuit to ground. Check the damper motor cable (-) between throttle unit terminal #2 and engine control module (ECM) terminal #A74 (#B14). Check for an open circuit. Check for a short circuit to supply voltage. Check for a short-circuit to ground. Also check the damper motor cables (+) and (-). Check for a short-circuit to each other. Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S15475582172012042500000) see «THROTTLE BODY»(ref-466651-S01198376532012042500000) see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466671-S34470172812012042500000)
  1. Ignition off. 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 #2 (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 damper motor cable (+) between throttle unit terminal #1 and engine control module (ECM) terminal #A75 (#B15). Check for an open circuit. Check for a short circuit to supply voltage. Check for a short-circuit to ground. Check the damper motor cable (-) between throttle unit terminal #2 and engine control module (ECM) terminal #A74 (#B14). Check for an open circuit. Check for a short circuit to supply voltage. Check for a short-circuit to ground. Also check the damper motor cables (+) and (-). Check for a short-circuit to each other. Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S26583508152012042500000) see «THROTTLE BODY»(ref-466651-S01198376532012042500000) see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466671-S29065998262012042500000)
  1. Ignition off
  2. 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 signal ground cable between engine control module (ECM) terminal #A40 (#A40) and throttle unit terminal #2 (cable harness side). Check for an open-circuit. 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 (cable harness side). Check the signal cable (potentiometer 1) between engine control module (ECM) terminal #A65 (#B5) and throttle unit terminal #6 (cable harness side). Check for an open-circuit. Check for a short-circuit to supply voltage. 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 VIDA vehicle communication (Throttle unit adaptation). Remedy as necessary. Other information: see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) see «COMPONENT SPECIFICATIONS»(ref-466592-S02390340522012042500000) see «THROTTLE BODY»(ref-466651-S01520166752012042500000) see «CONTENTS»(ref-466589-S05251896242012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466671-S13581839672012042500000)
  1. Ignition off
  2. 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 ground lead. Check for an open-circuit. Take readings between: Engine Control Module (ECM) #A14 (#A14) and throttle module #2. 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 (cable harness side). Check the signal cable (potentiometer 1) between engine control module (ECM) terminal #A65 (#B5) and throttle unit terminal #6 (cable harness side). Check for an open-circuit. Check for a short-circuit to supply voltage. 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 VIDA vehicle communication (Throttle unit adaptation). Remedy as necessary. Other information: see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) see «COMPONENT SPECIFICATIONS»(ref-466592-S02390340522012042500000) see «THROTTLE BODY»(ref-466651-S01520166752012042500000) see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466671-S41788661622012042500000)
  1. Ignition off
  2. 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 V) between engine control module (ECM) terminal #A19 (#A19) and throttle unit terminal #3 (cable harness 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 (cable harness side). Check the signal cable (potentiometer 1) between engine control module (ECM) terminal #A65 (#B5) and throttle unit terminal #6 (cable harness side). 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 VIDA vehicle communication (Throttle unit adaptation). Remedy as necessary. Other information: see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) see «COMPONENT SPECIFICATIONS»(ref-466592-S02390340522012042500000) see «THROTTLE BODY»(ref-466651-S01520166752012042500000) see «CONTENTS»(ref-466589-S05251896242012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466671-S40681918622012042500000)
  1. Ignition off
  2. 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 signal ground cable between engine control module (ECM) terminal #A40 (#A40) and throttle unit terminal #2 (cable harness side). Check for an open-circuit. 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 (cable harness side). Check the signal cable (potentiometer 2) between engine control module (ECM) terminal #A88 (#B28) and throttle unit terminal #5 (cable harness side). Check for a short-circuit to supply voltage. 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 VIDA vehicle communication (Throttle unit adaptation). Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) see «COMPONENT SPECIFICATIONS»(ref-466592-S02390340522012042500000) see «THROTTLE BODY»(ref-466651-S01520166752012042500000) see «CONTENTS»(ref-466589-S05251896242012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466671-S38424948782012042500000)
  1. Ignition off
  2. 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 ground lead. Check for an open-circuit. Take readings between: Engine Control Module (ECM) #A14 (#A14) and throttle module #2. 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 (cable harness side). Check the signal cable (potentiometer 2) between engine control module (ECM) terminal #A88 (#B28) and throttle unit terminal #5 (cable harness side). Check for a short-circuit to supply voltage. 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 VIDA vehicle communication (Throttle unit adaptation). Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) see «COMPONENT SPECIFICATIONS»(ref-466592-S02390340522012042500000) see «THROTTLE BODY»(ref-466651-S01520166752012042500000) see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466671-S32169709282012042500000)
  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 (5V) between engine control module (ECM) terminal #A19 (#A19) and throttle unit terminal #3 (cable harness 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 (cable harness side). Check the signal cable (potentiometer 2) between engine control module (ECM) terminal #A88 (#B28) and throttle unit terminal #5 (cable harness 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 Throttle unit adaptation in the vehicle communication socket. Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) see «COMPONENT SPECIFICATIONS»(ref-466592-S02390340522012042500000) see «THROTTLE BODY»(ref-466651-S01520166752012042500000) see «CONTENTS»(ref-466589-S05251896242012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466671-S41287731432012042500000)

CHECKING COMPONENTS AND WIRING

  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 damper motor (+) and (-) cables. Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Check between: Engine control module (ECM) terminal #A74 (#B14) and throttle unit terminal #4 Engine control module (ECM) terminal #A75 (#B15) and throttle unit terminal #1. 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), adaptation of the throttle unit must be carried out. See VIDA vehicle communication (Adaptation of the throttle unit). Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) see «COMPONENT SPECIFICATIONS»(ref-466592-S02390340522012042500000) see «THROTTLE BODY»(ref-466651-S01520166752012042500000) see «ENGINE CONTROL MODULE (ECM)»(ref-466594-S40317974462012042500000) see «CONTENTS»(ref-466589-S05251896242012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466671-S25349795252012042500000)
  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 damper motor (+) and (-) cables. Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Check between: Engine control module (ECM) terminal #A74 (#B14) and throttle unit terminal #4 Engine control module (ECM) terminal #A75 (#B15) and throttle unit terminal #1. 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 VIDA vehicle communication (Throttle unit adaptation). Other information see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) see «COMPONENT SPECIFICATIONS»(ref-466592-S02390340522012042500000) see «THROTTLE BODY, CLEANING»(ref-466667-S27857021572012042500000) see «THROTTLE BODY»(ref-466651-S01520166752012042500000) see «CONTENTS»(ref-466589-S05251896242012042500000)
  1. Continue Refer to «INFORMATION»(ref-466671-S20547061232012042500000)
  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 damper motor (+) and (-) cables. Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Check between: Engine control module (ECM) terminal #A74 (#B14) and throttle unit terminal #4 Engine control module (ECM) terminal #A75 (#B15) and throttle unit terminal #1. 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 VIDA vehicle communication (Throttle unit adaptation). Other information see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) see «COMPONENT SPECIFICATIONS»(ref-466592-S02390340522012042500000) see «THROTTLE BODY, CLEANING»(ref-466667-S27857021572012042500000) see «THROTTLE BODY»(ref-466651-S01520166752012042500000) see «CONTENTS»(ref-466589-S05251896242012042500000)
  1. Continue Refer to «INFORMATION»(ref-466671-S22697260292012042500000)
  1. Ignition off
  2. 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 see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) see «COMPONENT SPECIFICATIONS»(ref-466592-S02390340522012042500000) see «THROTTLE BODY, CLEANING»(ref-466667-S27857021572012042500000) see «THROTTLE BODY»(ref-466651-S01520166752012042500000) see «CONTENTS»(ref-466589-S05251896242012042500000)
  1. Continue Refer to «ADAPTATION OF THE THROTTLE UNIT»(ref-466671-S41804781912012042500000)
  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 damper motor (+) and (-) cable. Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Check between: Engine control module (ECM) terminal #A74 (#B14) and throttle unit terminal #4 (cable harness side) Engine control module (ECM) terminal #A75 (#B15) and throttle unit terminal #1 (cable harness side). 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-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) see «COMPONENT SPECIFICATIONS»(ref-466592-S02390340522012042500000) see «THROTTLE BODY, CLEANING»(ref-466667-S27857021572012042500000) see «THROTTLE BODY»(ref-466651-S01520166752012042500000) see «ENGINE CONTROL MODULE (ECM)»(ref-466594-S40317974462012042500000) see «CONTENTS»(ref-466589-S05251896242012042500000)
  1. Continue Refer to «ADAPTATION OF THE THROTTLE UNIT»(ref-466671-S00946976862012042500000)
  1. Ignition on. Check the status of the clutch pedal switch by starting the readout, depressing the clutch pedal to its end position and checking whether the status changes. NOTE: Read-out only works on vehicles built after week 46 2007. Check the clutch pedal switch's cable and function by measuring between Engine control module (ECM) #B15 (#C15) and ground (frame connection). Remedy as necessary. Other information: see «CONTENTS»(ref-466589-S05251896242012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S26583508152012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466671-S42230969312012042500000)
  1. Ignition off
  2. Check the accelerator pedal (AP) position sensor connector. Check for contact resistance and oxidation. Check the power supply cable (12 V) between accelerator pedal (AP) position sensor terminal #6 (cable harness side) and the relevant fuse for the circuit. Check for a short-circuit to ground. Check for an open-circuit. Check that the fuse for the circuit has not blown. Check the ground lead for power supply (12 V) between accelerator pedal (AP) position sensor terminal #4 (cable harness side) and the relevant ground terminal. Check for contact resistance and oxidation. Check for an open-circuit. HINT: With the ignition on, the power supply to the accelerator pedal (AP) position sensor measured between accelerator pedal (AP) position sensor terminals #4 (cable harness side) and #6 (cable harness side) must be approximately 12 V. Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) see «ACCELERATOR PEDAL»(ref-466672-S34630835312012042500000) see «CONTENTS»(ref-466589-S05251896242012042500000)
  1. Continue Refer to «CHECKING THE CONNECTORS AND CABLES»(ref-466671-S29775016212012042500000)
  1. Ignition off
  2. Check the accelerator pedal (AP) position sensor connector. Check for contact resistance and oxidation. Check the power supply cable (12 V) between accelerator pedal (AP) position sensor terminal #6 (cable harness side) and the relevant fuse for the circuit. Check for a short-circuit to ground. Check for an open-circuit. Check that the fuse for the circuit has not blown. Check the ground lead for power supply (12 V) between accelerator pedal (AP) position sensor terminal #4 (cable harness side) and the relevant ground terminal. Check for contact resistance and oxidation. Check for an open-circuit. HINT: With the ignition on, the power supply to the accelerator pedal (AP) position sensor measured between accelerator pedal (AP) position sensor terminals #4 (cable harness side) and #6 (cable harness side) must be approximately 12 V. Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) see «ACCELERATOR PEDAL»(ref-466672-S34630835312012042500000) see «CONTENTS»(ref-466589-S05251896242012042500000) .
  1. Continue Refer to «CHECKING THE CONNECTORS AND CABLES»(ref-466671-S35895927232012042500000)
  1. Ignition off
  2. Check the accelerator pedal (AP) position sensor connector. Check for contact resistance and oxidation. Check the power supply cable (12 V) between accelerator pedal (AP) position sensor terminal #6 (cable harness side) and the relevant fuse for the circuit. Check for a short-circuit to ground. Check for an open-circuit. Check that the fuse for the circuit has not blown. Check the ground lead for power supply (12 V) between accelerator pedal (AP) position sensor terminal #4 (cable harness side) and the relevant ground terminal. Check for contact resistance and oxidation. Check for an open-circuit. HINT: With the ignition on, the power supply to the accelerator pedal (AP) position sensor measured between accelerator pedal (AP) position sensor terminals #4 (cable harness side) and #6 (cable harness side) must be approximately 12 V. Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S22657918422012042500000) see «ACCELERATOR PEDAL»(ref-466672-S34630835312012042500000) see «CONTENTS»(ref-466589-S05251896242012042500000)
  1. Continue Refer to «CHECKING THE CONNECTORS AND CABLES»(ref-466671-S28657359802012042500000)
  1. Ignition off
  2. Check that the stop lamp switch is correctly installed. Check the resistance of the stop lamp switch with the switch pressed in and with the switch released. Take readings between terminals #1 and #2 (component side) on the stop lamp switch. HINT: The stop lamp switch must be closed when the brake pedal is depressed. The resistance of the stop lamp switch must be infinite when the brake pedal is unaffected. Check the stop lamp switch and engine control module (ECM) connectors. Check for contact resistance. Check for oxidation. Check the cable between stop lamp switch terminal #1 (cable harness side) and engine control module (ECM) terminal #B41 (#C41). Check for loose connections. Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S15475582172012042500000) see «STOPLAMP SWITCH»(ref-479181-S37066927572012061200000) see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466671-S07974891822012042500000)
  1. Ignition off
  2. Check that the stop lamp switch is correctly installed. Check the resistance of the stop lamp switch with the switch pressed in and with the switch released. Take readings between terminals #1 and #2 (component side) on the stop lamp switch. HINT: The stop lamp switch must be closed when the brake pedal is depressed. The resistance of the stop lamp switch must be infinite when the brake pedal is unaffected. Check the stop lamp switch and engine control module (ECM) connectors. Check for contact resistance. Check for oxidation. Check the cable between stop lamp switch terminal #1 (cable harness side) and engine control module (ECM) terminal #B41 (#C41). Check for loose connections. Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Remedy as necessary. Other information see «CONNECTING THE BREAKOUT BOX»(ref-466591-S26645247992012042500000) see «SIGNAL SPECIFICATION»(ref-466592-S26583508152012042500000) see «STOPLAMP SWITCH»(ref-479181-S37066927572012061200000) see «CHECKING WIRING AND TERMINALS»(ref-466589-S38415998382012042500000)
  1. Continue Refer to «VERIFICATION»(ref-466671-S24323465832012052400000)

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