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ABS/EDL/TCS Bosch 5.0
Fault table
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◆ Connect fault reader V.A.G 1551 and select "Brake electronics" with address word 03
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◆ Check the control unit version and press the ⇒ key.
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◆ Press keys 0 and 2 for "Interrogate fault memory" function and press Q key to confirm entry.
Notes:
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◆ Each fault is assigned a 5-digit fault code. It is listed in the left-hand column of the fault table. The message identifying the fault and the fault code will be printed out on the printer of fault reader V.A.G 1551 if the Print button is pressed. The fault code does not appear on the display of V.A.G 1551.
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◆ The content of the fault memory is retained until it is erased. => Page 01-13.
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◆ Sporadic faults are additionally indicated by "/SP" on the right-hand side of the display.
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◆ Static faults which cannot be detected when the vehicle is stationary are also identified with "/SP" after the ignition has been switched off and then on again.
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◆ The following table includes all the faults which can be detected by the control unit -J104 and displayed and printed out by V.A.G 1551. Faults are listed according to fault codes.
Fault table
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V.A.G 1551 print-out
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Possible causes of fault
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Fault remedy
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Fault code
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00000
No fault recognised!
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This display means that the self-diagnosis is finished. No faults are stored in the fault memory.
If relevant warning lamps light up, in spite of this display appearing, check the following points.
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- Voltage supply for control unit -J104 less than 10.5 V at a speed of less than 6 km/h.
- Open circuit in wiring for warning lamp -K47 between control unit -J104 and dash panel insert -J218
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- Refer to "Warning lamp functions overview"
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If no fault can be traced, and the problem continues to exist, there may be a mechanical malfunction (solenoid valve sticking).
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- Proceed to "Electrical check", functional test => Page 01-65.
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V.A.G 1551 print-out
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Possible causes of fault
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Fault remedy
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Fault code
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00257
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ABS inlet valve, front left -N101
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- Open circuit or short to positive/earth in wiring between ABS hydraulic unit -N55 and control unit -J104.
- Inlet valve -N101 defective.
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- Perform "Electrical check" , Perform test steps 1 and 13.
If no fault is traced by performing the "Electrical check", test all wiring and connections for intermittent loose contacts.
If the fault cannot be traced by any of these steps, fit a new control unit.
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00259
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ABS inlet valve, front left -N99
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- Open circuit, short to positive or earth in wiring between hydraulic unit -N55 and control unit -J104.
- ABS inlet valve -N99 defective.
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- Perform "Electrical check" , Perform test steps 2 and +14.
If no fault is traced by performing the "Electrical check", test all wiring and connections for intermittent loose contacts.
If the fault cannot be traced by any of these steps, fit a new control unit.
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V.A.G 1551 print-out
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Possible causes of fault
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Fault remedy
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Fault code
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00265
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ABS outlet valve, front left -N102
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- Open circuit, short to positive or earth in wiring between hydraulic unit -N55 and control unit -J104.
- Outlet valve -N102 defective.
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- Perform "Electrical check" , Test step 1.
If no fault is traced by performing the "Electrical check", test all wiring and connections for intermittent loose contacts.
If the fault cannot be traced by any of these steps, fit a new control unit.
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00267
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ABS outlet valve, front right -N100
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- Open circuit, short to positive or earth in wiring between hydraulic unit -N55 and control unit -J104.
- ABS outlet valve -N100 defective.
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- Perform "Electrical check" , Test step 2.
If no fault is traced by performing the "Electrical check", test all wiring and connections for intermittent loose contacts.
If the fault cannot be traced by any of these steps, fit a new control unit.
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V.A.G 1551 print-out
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Possible causes of fault
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Fault remedy
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Fault code
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00273
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ABS inlet valve, rear right -N133
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- Open circuit, short to positive or earth in wiring between hydraulic unit -N55 and control unit -J104.
- ABS inlet valve -N133 defective.
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- Perform "Electrical check" , Perform test steps 4 and +16.
If no fault is traced by performing the "Electrical check", test all wiring and connections for intermittent loose contacts.
If the fault cannot be traced by any of these steps, fit a new control unit.
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00274
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ABS inlet valve, rear left -N134
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- Open circuit, short to positive or earth in wiring between hydraulic unit -N55 and control unit -J104.
- ABS inlet valve -N134 defective.
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- Perform "Electrical check" , Perform test steps 3 and +15.
If no fault is traced by performing the "Electrical check", test all wiring and connections for intermittent loose contacts.
If the fault cannot be traced by any of these steps, fit a new control unit.
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V.A.G 1551 print-out
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Possible causes of fault
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Fault remedy
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Fault code
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00275
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ABS outlet valve, rear right -N135
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- Open circuit, short to positive or earth in wiring between hydraulic unit -N55 and control unit -J104.
- ABS outlet valve -N135 defective.
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- Perform "Electrical check" , Test step 4.
If no fault is traced by performing the "Electrical check", test all wiring and connections for intermittent loose contacts.
If the fault cannot be traced by any of these steps, fit a new control unit.
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00276
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ABS outlet valve, rear left -N136
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- Open circuit, short to positive or earth in wiring between hydraulic unit -N55 and control unit -J104.
- ABS outlet valve -N136 defective.
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- Perform "Electrical check" , Test step 3.
If no fault is traced by performing the "Electrical check", test all wiring and connections for intermittent loose contacts.
If the fault cannot be traced by any of these steps, fit a new control unit.
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V.A.G 1551 print-out
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Possible causes of fault
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Fault remedy
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Fault code
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00283
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Front left speed sensor -G47
Or:
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- Rotor dirty or damaged
- Excessive play in wheel bearing
- Speed sensor -G47 incorrectly installed
- Speed sensor -G47 defective.
- Short to earth.
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- Check, clean or renew rotor.
=> FWD and 4WD Running Gear; Repair group 4501-65, Test step 7.
If no fault is traced by "Read measured value block" or performing "Electrical check" test all wires and connectors for loose contacts
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Front left speed sensor -G47
Open circuit / short to positive
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- Incorrect control unit version
- Open circuit, short to positive in wiring between speed sensor -G47 and control unit -J104.
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- Check control unit identification => Page 01-49.
If the fault cannot be traced by any of these steps, fit a new control unit.
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V.A.G 1551 print-out
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Possible causes of fault
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Fault remedy
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Fault code
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00285
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Front right speed sensor -G45
Or:
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- Rotor dirty or damaged
- Excessive play in wheel bearing
- Speed sensor -G45 incorrectly installed
- Speed sensor -G45 defective.
- Short to earth.
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- Check, clean or renew rotor.
=> FWD and 4WD Running Gear; Repair group 4501-65, Test step 8.
If no fault is traced by "Read measured value block" or performing "Electrical check" test all wires and connectors for loose contacts
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Front right speed sensor -G45
Open circuit / short to positive
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- Incorrect control unit version
- Open circuit, short to positive in wiring between speed sensor -G45 and control unit -J104.
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- Check control unit identification => Page 01-49.
If the fault cannot be traced by any of these steps, fit a new control unit.
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V.A.G 1551 print-out
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Possible causes of fault
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Fault remedy
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Fault code
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00287
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Rear right speed sensor -G44
Or:
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- Rotor dirty or damaged
- Excessive play in wheel bearing
- Speed sensor -G44 incorrectly installed
- Speed sensor -G44 defective.
- Short to earth.
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- Check, clean or renew rotor.
=> FWD and 4WD Running Gear; Repair group 4501-65, Test step 10.
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Rear right speed sensor -G44
Open circuit / short to positive
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- Open circuit, short to positive in wiring between speed sensor -G44 and control unit -J104.
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- If no fault is traced by "Read measured value block" or performing "Electrical check" test all wires and connectors for loose contacts
If the fault cannot be traced by any of these steps, fit a new control unit.
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V.A.G 1551 print-out
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Possible causes of fault
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Fault remedy
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Fault code
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00290
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Rear left speed sensor -G46
Or:
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- Rotor dirty or damaged
- Excessive play in wheel bearing
- Speed sensor -G46 incorrectly installed
- Speed sensor -G46 defective.
- Short to earth.
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- Check, clean or renew rotor.
=> FWD and 4WD Running Gear; Repair group 4501-65, Test step 9.
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Rear left speed sensor -G46
Open circuit / short to positive
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- Open circuit, short to positive in wiring between speed sensor -G46 and control unit -J104.
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- If no fault is traced by "Read measured value block" or performing "Electrical check" test all wires and connectors for loose contacts
If the fault cannot be traced by any of these steps, fit a new control unit.
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V.A.G 1551 print-out
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Possible causes of fault
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Fault remedy
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Fault code
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00301
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ABS return pump -V39
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- Open circuit in wiring or contact resistance in earth connection or voltage supply to ABS return pump -V39.
- Open circuit or short to positive/earth in wiring between relay -J105 and control unit -J104.
- Relay for ABS return pump -J105, return pump -V39 or hydraulic unit defective.
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- Locate and rectify open circuit or contact resistance.
=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder
Locate and eliminate open circuit in wiring or short circuit.
=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder
Check relay -J 105, return pump -V39 and hydraulic unit -N55, Perform "Electrical check" => Page 01-62.
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V.A.G 1551 print-out
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Possible causes of fault
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Fault remedy
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Fault code
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00302
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Solenoid valve relay ABS -J106
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- Defective wiring or excessive resistance in earth connection to solenoid valve relay -J106.
- Open circuit or short to positive/earth in wiring between relay -J106 and control unit -J104.
- Solenoid valve relay -J106 or hydraulic unit -N55 defective
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- Check earth connection for contact resistance and defective wiring
=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder
Locate and eliminate open circuit in wiring or short circuit.
=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder
Check relay -J 106 and hydraulic unit, Perform "Electrical check" => Page 01-62.
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V.A.G 1551 print-out
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Possible causes of fault
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Fault remedy
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Fault code
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00526
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Brake light switch -F
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FWD:
Open circuit
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- Both brake lights -M9, -M10 or control unit -J104 defective.
- Wiring from brake lights to control unit defective.
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- Locate and eliminate open circuit in wiring or short circuit.
=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder
Replace bulbs
Check brake light switch, "Read measured value block", display group 2 => Page 01-62.
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4WD:
Implausible signal
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- Open circuit or short circuit to positive/earth in wiring between brake light switch and bulbs for brake lights -M9, -M10 or control unit -J104.
- Brake light bulbs -M9 or -M10 defective.
- Brake light switch defective
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V.A.G 1551 print-out
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Possible causes of fault
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Fault remedy
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Fault code
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00529
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Speed information missing
No signal
- This fault can only occur on vehicles with TCS
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- Open circuit or short circuit to positive/earth in wiring between control unit -J104 and engine control unit.
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- "Read measured value block", display group 3 .
Locate and eliminate open circuit in wiring or short circuit.
=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder
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- Engine control unit defective.
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- If the rev counter in the instrument cluster is not working, and no fault can be found in the wiring, this means that the engine control unit is defective and must be renewed.
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- Control unit -J104 defective.
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- If rev counter in instrument cluster is not working and no fault is found in wiring, control unit -J104 is defective and is to be replaced.
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V.A.G 1551 print-out
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Possible causes of fault
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Fault remedy
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Fault code
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00532
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Power supply
Signal too low
Notes:
- This fault affects the voltage supply for the control unit.
- This fault is only stored in the memory if it occurs at a road speed above 6 km/h.
- The ABS, ABS/EDL and ASR system will be switched on again and the warning lamps will go out as soon as the supply voltage returns to the required level.
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- Open circuit or excessive resistance in voltage supply wiring from terminal 15 to control unit -J104, contact 1.
- Loss of voltage in electrical system
- Battery defective
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- Perform "Electrical check" =>Page
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V.A.G 1551 print-out
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Possible causes of fault
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Fault remedy
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Fault code
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00597
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Differing wheel speed impulses
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- Rotor dirty or damaged
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- Check rotor.
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- Excessive play in wheel bearing
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- Check wheel bearing
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- Speed sensors -G44, -G45, -G46, -G47 incorrectly installed
- Speed sensors -G44, -G45, -G46, -G47 defective.
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- Check speed sensors.
=> Brake System; Repair group 4501-65, Test steps 7 to 10.
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- Wheels or tyre sizes not the same on all four wheels
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- Check wheels and tyre sizes
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V.A.G 1551 print-out
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Possible causes of fault
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Fault remedy
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Fault code
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00623
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ABS/gearbox electrical connection
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Manual gearbox:
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- This fault can only occur on vehicles with TCS
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- ABS/EDL/TCS control unit -J104 incorrectly coded
- Short to positive at terminal 45.
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- Check encoding of ABS/EDL/TCS-control unit -J104 => Page 01-53.
Trace and repair short circuit
=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder
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Automatic gearbox
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- Open circuit or short to earth between ABS/EDL/TCS control unit -J104 and automatic gearbox control unit -J217.
- ABS/EDL/TCS control unit -J104 incorrectly coded
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- Check encoding of ABS/EDL/TCS-control unit -J104 => Page 01-53.
Locate and eliminate open circuit in wiring or short circuit.
=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder
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V.A.G 1551 print-out
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Possible causes of fault
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Fault remedy
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Fault code
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00642
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EDL change-over valve, front right -N166
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- Open circuit or short to positive/earth in wiring between hydraulic unit -N55 and control unit -J104.
- EDL change-over valve -USV2 -N166 defective.
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- Perform "Electrical check" , Perform test steps 5 and +18.
If no fault is traced by performing the "Electrical check", test all wiring and connections for intermittent loose contacts.
If the fault cannot be traced by any of these steps, fit a new control unit.
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00643
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EDL outlet valve, front right -N167
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- Open circuit or short to positive/earth in wiring between hydraulic unit -N55 and control unit -J104.
- EDL outlet valve -ASV2 -N167 defective.
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- Perform "Electrical check" , Perform test steps 6 and +18.
If no fault is traced by performing the "Electrical check", test all wiring and connections for intermittent loose contacts.
If the fault cannot be traced by any of these steps, fit a new control unit.
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V.A.G 1551 print-out
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Possible causes of fault
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Fault remedy
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Fault code
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00644
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EDL change-over valve, front left -N168
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- Open circuit or short to positive/earth in wiring between hydraulic unit -N55 and control unit -J104.
- EDL change-over valve -USV2 -N168 defective.
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- Perform "Electrical check" , Perform test steps 5 and +17.
If no fault is traced by performing the "Electrical check", test all wiring and connections for intermittent loose contacts.
If the fault cannot be traced by any of these steps, fit a new control unit.
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00645
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EDL change-over valve front left -N169
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- Open circuit or short to positive/earth in wiring between hydraulic unit -N55 and control unit -J104.
- EDL outlet valve -ASV2 -N169 defective.
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- Perform "Electrical check" , Perform test steps 6 and +17.
If no fault is traced by performing the "Electrical check", test all wiring and connections for intermittent loose contacts.
If the fault cannot be traced by any of these steps, fit a new control unit.
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V.A.G 1551 print-out
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Possible causes of fault
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Fault remedy
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Fault code
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00646
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ABS-TCS/engine electrical connection 1
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- Open circuit or short circuit to positive/earth in wiring between control unit -J104, terminal 18 and engine control unit.
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- Locate and eliminate open circuit in wiring or short circuit.
=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder
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Note:
The following signals are sent from control unit -J104 to engine control unit via this connection:
- MAD signal (masking of engine misfire monitoring) for On Board Diagnostics
- MMS signal (engine torque -specified)
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- Control unit -J104 defective.
- Engine control unit defective.
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- Renew control unit -J104.
Renew engine control unit
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V.A.G 1551 print-out
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Possible causes of fault
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Fault remedy
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Fault code
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00647
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ABS-TCS/engine electrical connection 2
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- Open circuit or short circuit to positive/earth in wiring between control unit -J104, terminal 47 and engine control unit.
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- "Read measured value block", display group 3 .
Locate and eliminate open circuit in wiring or short circuit.
=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder
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Note:
The following signal is transmitted via this connection from engine control unit to control unit -J104:
- MMI signal (engine torque - actual)
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- Engine control unit defective.
- ABS/EDL/TCS control unit -J104 defective.
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- Renew engine control unit
Replace ABS/EDL/TCS control unit -J104.
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V.A.G 1551 print-out
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Possible causes of fault
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Fault remedy
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Fault code
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00668
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Vehicle voltage, terminal 30 Open circuit
- On vehicles with EDL control unit -J104 requires this voltage supply after ignition is switched off to calculate brake temperature => Page 01-33.
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- Voltage supply to control unit -J104 (contact 50) open or short to earth.
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- Test wiring
=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder
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V.A.G 1551 print-out
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Possible causes of fault
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Fault remedy
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Fault code
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00761
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Fault stored in engine control unit
- This fault can only occur on vehicles with TCS
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- A fault has been stored in the engine control unit. The engine control unit is not able to reduce engine torque.
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- Rectify fault in engine management as described in relevant Workshop Manual (engine). Erase fault memory of engine control unit.
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65535
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Control unit defective
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- Control unit -J104 defective.
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- Renew control unit -J104.
Note:
In this case the fault memory is not to be erased. The data stored in the fault memory aid the detection of the damage in the control unit. This data is used for the continuous improvement of the product.
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