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ESP Fault table
Fault table; fault codes from 18031 to 65535
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V.A.G 1551 printer
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Possible causes of fault
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Fault remedy
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Fault code
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18031
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Check the communications on the CAN bus by selecting function 08 "Read measured value block", , display group 125
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CAN bus - no communication
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Data transfer between control unit -J104 engine control unit and gearbox control unit as well as between control unit -J04 and steering angle sender -G85 are transferred via CAN bus.
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- Check CAN bus by selecting function 08 "Read measured value block", => Page 01-249, display group 125
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Continued next page.
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- Control unit -J104 is not connected to data bus wires.
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- Check whether control unit -J104 is connected to data bus wires.
=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder
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V.A.G 1551 printer
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Possible causes of fault
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Fault remedy
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Fault code
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18031
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CAN bus - no communication
Continued:
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- Open circuit in both bus wires to the above-mentioned components immediately downstream of control unit -J104.
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- Check bus wires => Page 01-29.
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Continued next page.
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- CAN bus low and high wires interchanged.
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- Check for interchanged wires. The control unit can neither receive or transmit signals if the wires are interchanged.
=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder
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V.A.G 1551 printer
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Possible causes of fault
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Fault remedy
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Fault code
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18031
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CAN bus - no communication
Continued:
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- None of the above-mentioned components which communicate with control unit -J104 via the CAN bus are connected to the data bus wiring.
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- Check whether engine control unit, gearbox control unit and steering angle sender -G85 are connected.
=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder
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- Control unit -J104 defective.
Note: Replacement of the control unit is always the final option.
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- If the fault cannot be traced by any of these steps, renew control unit -J104
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V.A.G 1551 printer
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Possible causes of fault
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Fault remedy
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Fault code
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18034
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Check the communications on the CAN bus by selecting function 08 "Read measured value block", => Page 01-249, display group 125
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- The gearbox control unit is not connected.
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- Check whether gearbox control unit is connected
=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations
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Continued next page.
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- Gearbox control unit without CAN bus output is installed.
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- Refer to Parts list and check correct Part No. for vehicle.
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V.A.G 1551 printer
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Possible causes of fault
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Fault remedy
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Fault code
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18034
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CAN bus - no message from gearbox control unit
Continued:
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- Inadequate voltage supply to gearbox control unit.
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- Read out fault memory of gearbox control unit. Eliminate fault in line with appropriate gearbox Workshop Manual and erase fault memory of gearbox control unit.
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- Fault in bus wiring
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- Check bus wires => Page 01-29
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- Control unit -J104 defective.
Note: Replacement of the control unit is always the final option.
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- If the fault cannot be traced by any of these steps, renew control unit -J104
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V.A.G 1551 printer
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Possible causes of fault
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Fault remedy
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Fault code
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18036
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Check the communications on the CAN bus by selecting function 08 "Read measured value block", => Page 01-249, display group 125
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Continued next page.
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- Short to earth in voltage supply for steering angle sender -G85, contact 4 to control unit -J104, contact 2.
- Short to positive in voltage supply for steering angle sender -G85, contact 1.
- Open circuit or excessive contact resistance in one of the voltage supply wires for the steering angle sender -G 85.
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- Check voltage supply wires of steering angle sender -G85.
Voltage supply via terminal 30.
=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder
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V.A.G 1551 printer
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Possible causes of fault
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Fault remedy
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Fault code
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18055
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- Encoding of control unit -J104 does not match encoding of engine control unit -J220 (petrol engines) or -J338 (diesel engines).
- Encoding of control unit -J104 does not match encoding of automatic gearbox control unit -J217 (vehicles with automatic gearbox only).
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- Check encoding of control unit -J104.
Check encoding of engine control unit -J220 (petrol engines) or -J338 (diesel engines).
Check encoding of gearbox control unit -J217 (vehicles with automatic gearbox only).
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V.A.G 1551 printer
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Possible causes of fault
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Fault remedy
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Fault code
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18256
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- A fault has been stored in the engine control unit.
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- Read out fault memory of engine control unit. Eliminate fault in line with appropriate gearbox Workshop Manual and erase fault memory of engine control unit.
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- Fault in bus wiring
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- Check bus wires => Page 01-29
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V.A.G 1551 printer
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Possible causes of fault
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Fault remedy
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Fault code
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18258
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Check the communications on the CAN bus by selecting function 08 "Read measured value block", => Page 01-249, display group 125
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- The engine control unit is not connected.
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- Check whether engine control unit is connected
=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder
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Continued next page.
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- Inadequate voltage supply to engine control unit.
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- Read out fault memory of engine control unit. Eliminate fault in line with appropriate gearbox Workshop Manual and erase fault memory of engine control unit.
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V.A.G 1551 printer
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Possible causes of fault
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Fault remedy
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Fault code
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18258
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CAN bus - no message from engine control unit
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- Engine control unit without CAN bus output is installed.
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- Refer to Parts list and check correct Part No. for vehicle.
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Continued:
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- Fault in bus wiring
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- Check bus wires => Page 01-29
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- Control unit -J104 defective.
Note: Replacement of the control unit is always the final option.
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- If the fault cannot be traced by any of these steps, renew control unit -J104
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V.A.G 1551 printer
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Possible causes of fault
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Fault remedy
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Fault code
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18262
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Check the communications on the CAN bus by selecting function 08 "Read measured value block", => Page 01-249, display group 125
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Continued next page.
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- Bus wiring fault between control unit -J104, engine control unit, gearbox control unit or steering angle sender. Control units are not able to communicate.
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- Check bus wires => Page 01-29.
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V.A.G 1551 printer
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Possible causes of fault
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Fault remedy
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Fault code
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18262
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CAN bus hardware defective
Continued:
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Data transfer between control unit -J104 engine control unit and gearbox control unit as well as between control unit -J04 and steering angle sender -G85 are transferred via CAN bus.
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Refer to section on "CAN bus", Page 01-23.
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- Bus wiring fault between control unit -J104 and steering angle sender -G85. Control units are not able to communicate.
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V.A.G 1551 printer
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Possible causes of fault
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Fault remedy
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Fault code
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18263
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- Software version of control unit -J104 responsible for CAN bus does not match that of engine control unit.
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- Check part numbers of control units fitted by way of function 01 "Interrogate control unit version" => Page 01-226.
Refer to parts list and check correct Part no. for vehicle.
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18264
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- A fault has been stored in the engine control unit.
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- Read out fault memory of engine control unit. Eliminate fault in line with appropriate gearbox Workshop Manual and erase fault memory of engine control unit.
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18265
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- A fault has been stored in the engine control unit.
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- Read out fault memory of engine control unit. Eliminate fault in line with appropriate gearbox Workshop Manual and erase fault memory of engine control unit.
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V.A.G 1551 printer
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Possible causes of fault
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Fault remedy
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Fault code
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18266
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- A fault has been stored in the engine control unit.
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- Read out fault memory of engine control unit. Eliminate fault in line with appropriate gearbox Workshop Manual and erase fault memory of engine control unit.
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65535
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Control unit
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- Control unit defective
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- Replace control unit. 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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