Audi Workshop Service and Repair Manuals

Fault tables   Note t  As the control units are interconnected via the CAN data bus, always start by interrogating the fault memories of all the control units in the vehicle as the first step in the fault-finding routine. This can be done by starting the automatic test sequence: Diagnosis function “00 - Interrogate fault memory - Complete system”. You can then check to see if there are faults stored which may affect the ABS. t  The following table includes all faults which can be detected by the ABS with EDL control unit -J104- and displayed by -VAS 5051 A- when interrogating the fault memory. t  The contents of the fault memory remains stored until the memory is erased; Erasing fault memory → Chapter. t  Faults are listed according to a 5-digit fault code, which appears in the left-hand column of the fault table. t  Sporadic (intermittent) faults are identified as such by the word “sporadic” appearing on the display. t  Check wiring and connectors going to the relevant components according to current flow diagram before renewing components indicated as faulty by -VAS 5051 A-. Also check earth connections according to current flow diagram. This is particularly important if faults are indicated as being “sporadic”.

Fault 00283

Display on -VAS 5051 A-	Possible cause of fault	Fault remedy
00283 Front left speed sensor -G47-
	t  Open circuit, loose contact or short to positive or earth in speed sensor wire or speed sensor t  Speed sensor winding defective	–  Perform electrical check, step 6 → Anchor and step 10 → Anchor
	t  Speed sensor or rotor damaged	–  Check speed sensor and rotor → Brake system; Rep. Gr.45
	t  ABS with EDL control unit -J104- defective	–  Remove hydraulic control unit, renew control unit → Brake system; Rep. Gr.45, then code control unit → Chapter
00283 Front left speed sensor -G47- Mechanical fault
l  This fault is only detected above 20 km/h (carry out test drive).	t  Excessive air gap between speed sensor and rotor.	–  Check installation of speed sensor and rotor → Brake system; Rep. Gr.45
	t  Outlet valves in hydraulic unit defective	–  Check hydraulic unit in final control diagnosis → Chapter
00283 Front left speed sensor -G47- Signal outside tolerance
l  This fault is only detected above 20 km/h (carry out test drive).	t  Open circuit, loose contact or short to positive or earth in speed sensor wire or speed sensor t  Speed sensor winding defective	–  Perform electrical check, step 6 → Anchor and step 10 → Anchor
	t  Electrical interference from external interference sources (high frequency radiation, e.g. non-insulated ignition cable)	–  Read measured value block 001 → Anchor
	t  Excessive air gap between speed sensor and rotor.	–  Check installation of speed sensor and rotor → Brake system; Rep. Gr.45
	t  Speed sensor or rotor damaged	–  Check speed sensor and rotor → Brake system; Rep. Gr.45

Fault 00285

Display on -VAS 5051 A-	Possible cause of fault	Fault remedy
00285 Front right speed sensor -G45-
	t  Open circuit, loose contact or short to positive or earth in speed sensor wire or speed sensor t  Speed sensor winding defective	–  Perform electrical check, step 5 → Anchor and step 9 → Anchor
	t  Speed sensor or rotor damaged	–  Check speed sensor and rotor → Brake system; Rep. Gr.45
	t  ABS with EDL control unit -J104- defective	–  Remove hydraulic control unit, renew control unit → Brake system; Rep. Gr.45, then code control unit → Chapter
00285 Front right speed sensor -G45- Mechanical fault
l  This fault is only detected above 20 km/h (carry out test drive).	t  Excessive air gap between speed sensor and rotor.	–  Check installation of speed sensor and rotor → Brake system; Rep. Gr.45
	t  Outlet valves in hydraulic unit defective	–  Check hydraulic unit in final control diagnosis → Chapter
00285 Front right speed sensor -G45- Signal outside tolerance
l  This fault is only detected above 20 km/h (carry out test drive).	t  Open circuit, loose contact or short to positive or earth in speed sensor wire or speed sensor t  Speed sensor winding defective	–  Perform electrical check, step 5 → Anchor and step 9 → Anchor
	t  Electrical interference from external interference sources (high frequency radiation, e.g. non-insulated ignition cable)	–  Read measured value block 001 → Anchor
	t  Excessive air gap between speed sensor and rotor.	–  Check installation of speed sensor and rotor → Brake system; Rep. Gr.45
	t  Speed sensor or rotor damaged	–  Check speed sensor and rotor → Brake system; Rep. Gr.45

Fault 00287

Display on -VAS 5051 A-	Possible cause of fault	Fault remedy
00287 Rear right speed sensor -G44-
	t  Open circuit, loose contact or short to positive or earth in speed sensor wire or speed sensor t  Speed sensor winding defective	–  Perform electrical check, step 7 → Anchor and step 11 → Anchor
	t  Speed sensor or rotor damaged	–  Check speed sensor and rotor → Brake system; Rep. Gr.45
	t  ABS with EDL control unit -J104- defective	–  Remove hydraulic control unit, renew control unit → Brake system; Rep. Gr.45, then code control unit → Chapter
00287 Rear right speed sensor -G44- Mechanical fault
l  This fault is only detected above 20 km/h (carry out test drive).	t  Excessive air gap between speed sensor and rotor.	–  Check installation of speed sensor and rotor → Brake system; Rep. Gr.45
	t  Outlet valves in hydraulic unit defective	–  Check hydraulic unit in final control diagnosis → Chapter
00287 Rear right speed sensor -G44- Signal outside tolerance
l  This fault is only detected above 20 km/h (carry out test drive).	t  Open circuit, loose contact or short to positive or earth in speed sensor wire or speed sensor t  Speed sensor winding defective	–  Perform electrical check, step 7 → Anchor and step 11 → Anchor
	t  Electrical interference from external interference sources (high frequency radiation, e.g. non-insulated ignition cable)	–  Read measured value block 001 → Anchor
	t  Excessive air gap between speed sensor and rotor.	–  Check installation of speed sensor and rotor → Brake system; Rep. Gr.45
	t  Speed sensor or rotor damaged	–  Check speed sensor and rotor → Brake system; Rep. Gr.45

Fault 00290

Display on -VAS 5051 A-	Possible cause of fault	Fault remedy
00290 Rear left speed sensor -G46-
	t  Open circuit, loose contact or short to positive or earth in speed sensor wire or speed sensor t  Speed sensor winding defective	–  Perform electrical check, step 8 → Anchor and step 12 → Anchor
	t  Speed sensor or rotor damaged	–  Check speed sensor and rotor → Brake system; Rep. Gr.45
	t  ABS with EDL control unit -J104- defective	–  Remove hydraulic control unit, renew control unit → Brake system; Rep. Gr.45, then code control unit → Chapter
00290 Rear left speed sensor -G46- Mechanical fault
l  This fault is only detected above 20 km/h (carry out test drive).	t  Excessive air gap between speed sensor and rotor.	–  Check installation of speed sensor and rotor → Brake system; Rep. Gr.45
	t  Outlet valves in hydraulic unit defective	–  Check hydraulic unit in final control diagnosis → Chapter
	t  Excessive air gap between speed sensor and rotor.	–  Check installation of speed sensor and rotor → Brake system; Rep. Gr.45
00290 Rear left speed sensor -G46- Signal outside tolerance
l  This fault is only detected above 20 km/h (carry out test drive).	t  Open circuit, loose contact or short to positive or earth in speed sensor wire or speed sensor t  Speed sensor winding defective	–  Perform electrical check, step 8 → Anchor and step 12 → Anchor
	t  Electrical interference from external interference sources (high frequency radiation, e.g. non-insulated ignition cable)	–  Read measured value block 001 → Anchor
	t  Excessive air gap between speed sensor and rotor.	–  Check installation of speed sensor and rotor → Brake system; Rep. Gr.45
	t  Speed sensor or rotor damaged	–  Check speed sensor and rotor → Brake system; Rep. Gr.45

Fault 00538

Display on -VAS 5051 A-	Possible cause of fault	Fault remedy
00538 Reference voltage
	t  Open circuit, loose contact or short circuit to positive or earth in voltage supply wiring for lateral acceleration sender -G200-, brake pressure sender 1 -G201-, yaw rate sender -G202- or brake pressure sender 2 -G214-	–  Perform electrical check, test step 20 → Anchor, test step 21 → Anchor, test step 22 → Anchor, test step 23 → Anchor

Fault 00668

Display on -VAS 5051 A-	Possible cause of fault	Fault remedy
00668 Vehicle voltage, terminal 30 Signal outside tolerance
	t  Fuse defective t  Open circuit, loose contact or short to positive or earth in voltage supply wiring	–  Perform electrical check, step 1 → Anchor and step 2 → Anchor

Fault 00778

Display on -VAS 5051 A-	Possible cause of fault	Fault remedy
00778 Steering angle sender -G85- No communication
	t  Faults in CAN bus wiring	–  Check CAN bus wiring between ABS with EDL control unit -J104- and steering angle sender -G85- → Chapter
	t  High and Low CAN bus wiring interchanged	–  Check CAN Bus wiring for interchanged connections according to current flow diagram
	t  The output of one of the control units communicating via the CAN bus is defective.	–  Check CAN bus wiring → Chapter
	t  Steering angle sender -G85- defective	–  Read measured value block 004 → Anchor –  Renew sender → Brake system; Rep. Gr.45, then perform zero compensation in basic setting → Chapter
00778 Steering angle sender -G85- No setting or wrong setting
	t  Steering angle sender -G85- sends no values or incorrect values	–  Perform zero compensation → Chapter
00778 Steering angle sender -G85- Mechanical fault
	t  Installation position of steering angle sender -G85- not OK	–  Check installation position of sender → Brake system; Rep. Gr.45
	t  Running gear geometry not OK	–  Perform wheel alignment → Running gear, front-wheel drive and four-wheel drive; Rep. Gr.44
	t  No zero compensation performed after removing and installing steering wheel	–  Perform zero compensation → Chapter
00778 Steering angle sender -G85- Implausible signal
	t  Installation position of steering angle sender -G85- not OK	–  Check installation position of sender → Brake system; Rep. Gr.45
	t  Running gear geometry not OK	–  Perform wheel alignment → Running gear, front-wheel drive and four-wheel drive; Rep. Gr.44
	t  Vibrations in steering due to wear	–  Renew defective components, then perform zero compensation in basic setting → Chapter
00778 Steering angle sender -G85- defective
	t  Steering angle sender -G85- sends no values or incorrect values	–  Renew sender → Brake system; Rep. Gr.45, then perform zero compensation in basic setting → Chapter

Fault 00810

Display on -VAS 5051 A-	Possible cause of fault	Fault remedy
00810 Sender 1/2 for brake pressure Implausible signal
	t  Open circuit in earth connection to brake pressure sender 1 -G201- or brake pressure sender 2 -G214- t  Short circuit in signal wiring to brake pressure sender 1 -G201- or brake pressure sender 2 -G214-	–  Perform electrical check, step 22 → Anchor and step 23 → Anchor
	t  Brake pressure sender 1 -G201- or brake pressure sender 2 -G214- defective	–  Renew sender → Brake system; Rep. Gr.45, then perform zero compensation in basic setting → Chapter
	t  One hydraulic brake circuit has failed	–  Check brake system → Brake system; Rep. Gr.47

Fault 00812

Display on -VAS 5051 A-	Possible cause of fault	Fault remedy
00812 Brake pressure solenoid trip switch -F84- → Note
	t  Open circuit, loose contact or short circuit to positive or earth in wiring to brake detection switch, ESP -F83-	–  Perform electrical check, test step 24 → Anchor
	t  Brake detection switch, ESP -F83- defective	–  Perform function test in basic setting → Chapter
	t  Brake servo defective	–  Renew brake servo → Brake system; Rep. Gr.47, then perform function test in basic setting → Chapter

1)	The brake pressure solenoid trip switch -F84- referred to in the fault-finding display is designated brake detection switch, ESP -F83- in the Current flow diagram.

Fault 00813

Display on -VAS 5051 A-	Possible cause of fault	Fault remedy
00813 Brake pressure sender 2 -G214- Electrical fault in circuit
	t  Open circuit, loose contact or short circuit to positive or earth in wiring to brake pressure sender 2 -G214-	–  Perform electrical check, test step 23 → Anchor
	t  Brake pressure sender 2 -G214- defective	–  Renew sender → Brake system; Rep. Gr.45, then perform zero compensation in basic setting → Chapter

Fault 00814

Display on -VAS 5051 A-	Possible cause of fault	Fault remedy
00814 Brake pressure solenoid valve -N247- → Note
	t  Open circuit, loose contact or short circuit to positive or earth in wiring to brake detection switch, ESP -F83-	–  Perform electrical check, test step 24 → Anchor
	t  Brake detection switch, ESP -F83- defective	–  Perform function test in basic setting → Chapter
	t  Brake servo defective	–  Renew brake servo → Brake system; Rep. Gr.47, then perform function test in basic setting → Chapter
	t  Output stage in ABS with EDL control unit -J104- defective	–  Remove hydraulic control unit, renew control unit → Brake system; Rep. Gr.45, then code control unit → Chapter

2)	The brake pressure solenoid valve -N247- referred to in the fault-finding display is designated brake detection switch, ESP -F83- in the Current flow diagram.

Fault 01044

Display on -VAS 5051 A-	Possible cause of fault	Fault remedy
01044 Control unit incorrectly coded
	t  An incorrect code number has been entered	–  Check coding → Chapter
	t  Coding bridges in wiring harness damaged	–  Check wires in wiring harness; perform electrical check, test step 13 → Anchor

Fault 01130

Display on -VAS 5051 A-	Possible cause of fault	Fault remedy
01130 ABS operation Implausible signal
l  This fault is only detected above 20 km/h (carry out test drive).	t  Electrical interference from external interference sources (high frequency radiation, e.g. non-insulated ignition cable) t  Open circuit, loose contact or short to positive or earth in wiring	–  Check all electrical wiring and connectors –  Erase fault memory –  Perform test drive at more than 20 km/h –  Interrogate fault memory again If the fault is not rectified: –  Remove hydraulic control unit, renew control unit → Brake system; Rep. Gr.45, then code control unit → Chapter

Fault 01276

Display on -VAS 5051 A-	Possible cause of fault	Fault remedy
01276 ABS hydraulic pump -V64- Signal outside tolerance
l  This fault is only detected above 20 km/h (carry out test drive).	t  Open circuit or short circuit to earth or positive in internal wiring: ABS with EDL control unit -J104-/ABS hydraulic pump -V64-	–  Check ABS hydraulic pump -V64- via final control diagnosis → Chapter If ABS hydraulic pump -V64- starts running during final control diagnosis: –  Perform electrical check, test step 1 → Anchor –  Check all wiring and connections for short to positive or earth according to current flow diagram.
	t  ABS with EDL control unit -J104- defective	–  Remove hydraulic control unit, renew control unit → Brake system; Rep. Gr.45, then code control unit → Chapter
	t  Pump motor defective	–  Renew hydraulic control unit → Brake system; Rep. Gr.45

Fault 01279

Display on -VAS 5051 A-	Possible cause of fault	Fault remedy
01279 Longitudinal acceleration sender -G251- → Note Electrical fault in circuit
	t  Open circuit, loose contact or short circuit to positive or earth in wiring connection going to longitudinal acceleration sender -G251-	–  Perform electrical check, test step 25 → Anchor
	t  Longitudinal acceleration sender -G251- defective	–  Read measured value block 006 → Anchor –  Renew sender → Brake system; Rep. Gr.45, then perform zero compensation in basic setting → Chapter
01279 Longitudinal acceleration sender -G251- → Note Implausible signal
	t  Installation position of longitudinal acceleration sender -G251- not OK	–  Check installation position → Brake system; Rep. Gr.45
	t  Longitudinal acceleration sender -G251- defective	–  Read measured value block 006 → Anchor –  Renew sender → Brake system; Rep. Gr.45, then perform zero compensation in basic setting → Chapter

3)	Only applies to vehicles with four-wheel drive.

Fault 01312

Display on -VAS 5051 A-	Possible cause of fault	Fault remedy
01312 Drive train data bus defective → Note
	t  ABS with EDL control unit -J104- incorrectly coded	–  Check coding → Chapter
	t  Engine control unit incorrectly coded	–  Check coding of engine control unit → Rep. Gr.01
	t  Faults in CAN bus wiring	–  Check CAN bus wiring between engine control unit and ABS with EDL control unit -J104- → Chapter

4)	Is displayed together with fault “00778 - Steering angle sender: -G85; No communication”.

Fault 01314

Display on -VAS 5051 A-	Possible cause of fault	Fault remedy
01314 Engine control unit
	t  Fault in engine control unit	–  Interrogate fault memory of engine control unit → Rep. Gr.01, rectify fault if necessary and erase fault memory
01314 Engine control unit No communication
l  Signals are transmitted between ABS with EDL control unit -J104- and engine control unit via CAN data bus	When displayed as static fault: t  ABS with EDL control unit -J104- or engine control unit not CAN compatible	–  Refer to control unit identification of ABS with EDL control unit -J104- → Anchor and engine control unit to check that correct control units are installed. For correct version refer to → Parts catalogue
	t  Fault in engine control unit	–  Interrogate fault memory of engine control unit → Rep. Gr.01, rectify fault if necessary and erase fault memory
	When displayed as static and sporadic fault: t  Faults in CAN bus wiring	–  Check CAN bus wiring between engine control unit and ABS with EDL control unit -J104- → Chapter
	t  High and Low CAN bus wiring interchanged	–  Check CAN Bus wiring for interchanged connections according to current flow diagram
	t  The output of one of the control units communicating via the CAN bus is defective.	–  Check CAN bus wiring → Chapter

Fault 01315

Display on -VAS 5051 A-	Possible cause of fault	Fault remedy
01315 Gearbox control unit No communication → Note
l  Signals are transmitted between ABS with EDL control unit -J104- and gearbox control unit via CAN data bus	When displayed as static fault: t  ABS with EDL control unit -J104- or gearbox control unit not CAN compatible	–  Refer to control unit identification of ABS with EDL control unit -J104- → Anchor and gearbox control unit to check that correct control units are installed. For correct version refer to → Parts catalogue
	t  Fault in gearbox control unit	–  Interrogate fault memory of gearbox control unit → Rep. Gr.01, rectify fault if necessary and erase fault memory
	When displayed as static and sporadic fault: t  Faults in CAN bus wiring	–  Check CAN bus wiring between gearbox control unit and ABS with EDL control unit -J104- → Chapter
	t  High and Low CAN bus wiring interchanged	–  Check CAN Bus wiring for interchanged connections according to current flow diagram
	t  The output of one of the control units communicating via the CAN bus is defective.	–  Check CAN bus wiring → Chapter

5)	Only applies to vehicles with automatic gearbox and TCS

Fault 01324

Display on -VAS 5051 A-	Possible cause of fault	Fault remedy
01324 Four-wheel drive control unit -J492- No communication → Note
	t  Faults in CAN bus wiring	–  Read measured value block 125 → Anchor –  Check CAN bus wiring → Chapter

6)	Only applies to vehicles with four-wheel drive.

Fault 01423

Display on -VAS 5051 A-	Possible cause of fault	Fault remedy
01423 Lateral acceleration sender -G200- Electrical fault in circuit
	t  Open circuit, loose contact or short circuit to positive or earth in wiring connection going to lateral acceleration sender -G200-	–  Perform electrical check, test step 20 → Anchor
	t  Lateral acceleration sender -G200- defective	–  Read measured value block 004 → Anchor –  Renew sender → Brake system; Rep. Gr.45, then perform zero compensation in basic setting → Chapter
01423 Lateral acceleration sender -G200- Implausible signal
	t  Installation position of lateral acceleration sender -G200- not OK	–  Check installation position → Brake system; Rep. Gr.45
	t  Lateral acceleration sender -G200- defective	–  Read measured value block 004 → Anchor –  Renew sender → Brake system; Rep. Gr.45, then perform zero compensation in basic setting → Chapter

Fault 01434

Display on -VAS 5051 A-	Possible cause of fault	Fault remedy
01434 Brake light suppression relay, ESP -J508- Electrical fault in circuit
	t  Open circuit, loose contact or short circuit to positive or earth in wiring to brake light suppression relay, ESP -J508-	–  Perform electrical check, test step 26 → Anchor
	t  Brake light suppression relay, ESP -J508- defective	–  Renew relay → Current flow diagrams, Electrical fault finding and Fitting locations

Fault 01435

Display on -VAS 5051 A-	Possible cause of fault	Fault remedy
01435 Brake pressure sender 1 -G201- Electrical fault in circuit
	t  Open circuit, loose contact or short circuit to positive or earth in wiring to brake pressure sender 1 -G201-	–  Perform electrical check, test step 22 → Anchor
	t  Brake pressure sender 1 -G201- defective	–  Read measured value block, display group 005 → Anchor –  Renew sender → Brake system; Rep. Gr.45, then perform zero compensation in basic setting → Chapter

Fault 01542

Display on -VAS 5051 A-	Possible cause of fault	Fault remedy
01542 Yaw rate sender -G202- Electrical fault in circuit
	t  Open circuit, loose contact or short circuit to positive or earth in wiring to yaw rate sender -G202-	–  Perform electrical check, test step 20 → Anchor
	t  Yaw rate sender -G202- defective	–  Read measured value block 004 → Anchor –  Renew sender → Brake system; Rep. Gr.45.
01542 Yaw rate sender -G202- Implausible signal
	t  Open circuit in earth connection to yaw rate sender -G202-	–  Perform electrical check, test step 20 → Anchor
	t  Installation position of yaw rate sender -G202- not OK	–  Check installation position → Brake system; Rep. Gr.45
	t  Yaw rate sender -G202- defective	–  Read measured value block 004 → Anchor –  Renew sender → Brake system; Rep. Gr.45.

Fault 18256

Display on -VAS 5051 A-	Possible cause of fault	Fault remedy
18256 Please interrogate the engine control unit
	t  Fault stored in engine control unit	–  Interrogate fault memory of engine control unit → Rep. Gr.01, rectify fault if necessary and erase fault memory

Fault 65535

Display on -VAS 5051 A-	Possible cause of fault	Fault remedy
65535 Control unit defective
	t  Control unit defective	–  Remove hydraulic control unit, renew control unit → Brake system; Rep. Gr.45, then code control unit → Chapter Do not erase fault memory of old control unit. The data in the fault memory will help to identify the malfunction