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Steering fault table
Fault table
Notes on fault table
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◆ On account of the interlinking of control units by way of a data bus wire, always start fault-finding by implementing "Automatic test sequence" with key function 0 and 0 for all control units in the vehicle so as to interrogate their fault memories.
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◆ Listed in the following in ascending order of 5-digit fault codes are all the faults which can be detected by the power steering control unit -J500 and printed out on V.A.G 1551 or VAS 5051.
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◆ If faults only occur intermittently or if fault memory is not erased after fault elimination, such faults are displayed for a specified period as being "sporadic faults" -SP-.
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◆ The fault code only appears on the printout (in "Rapid data transfer" mode).
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Example:
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Fault code
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Fault type code
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5-digit
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3-digit
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00566
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035
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◆ The three-digit fault type code next to the fault code is a data code which can be ignored. Use is however to be made of the text relating to the type of fault.
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◆ The "Fault remedy" column makes reference to the individual test steps in the electrical check.
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◆ Before replacing components shown to be faulty, use current flow diagram to check all corresponding connectors, wires and earth connections.
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◆ On completion of repair work, always interrogate fault memory again with fault reader V.A.G 1551 or VAS 5051 and erase it.
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Output on printer of
V.A.G 1551
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Possible cause of trouble
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Fault remedy
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No faults detected
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Self-diagnosis is over if "No faults detected" appears on completion of repair work.
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Proceed as follows if electrohydraulic steering does not function properly despite "No faults detected" appearing on display or if Servotronic warning lamp -K92 lights:
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Continue fault-finding without self-diagnosis and work through entire electrical check .
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Output on printer of V.A.G 1551
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Possible cause of trouble
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Fault remedy
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00566
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Power steering operation implausible signal
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- No vehicle-speed signal
- Power steering switches to emergency operation
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- Check data bus =>Page
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00816
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Steering assistance sensor -G250 short to earth
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- Open circuit, short to earth or loose contact in wiring between power steering sensor -G250 and power steering control unit -J500
- Power steering sensor defective
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- Check wiring, connectors
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Steering assistance sensor -G250 open circuit/short to positive
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- Open circuit, short to positive or loose contact in wiring between power steering sensor -G250 and power steering control unit -J500
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- Check wiring, connectors
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Steering assistance sensor -G250 defective
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- Power steering sensor -G250 defective
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- Replace power steering sensor
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Output on printer of V.A.G 1551
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Possible cause of trouble
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Fault remedy
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00817
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Steering assistance temp. protection
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- Excessive temperature in hydraulic circuit
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- Check hydraulic circuit
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01288
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Supply voltage, term. 30 too low
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- Supply voltage less than 10 V
- Poor earth connection to control unit
- Battery flat
- Current draw with ignition off
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- Check voltage
Test step no. 1
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Supply voltage, term. 30 too high
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- Alternator voltage regulator defective
- Overvoltage caused by starting assistance
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- Check voltage
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01289
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Supply voltage, term. 15 too low
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- Open circuit in wiring
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- Check voltage
Test step no. 2
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Output on printer of V.A.G 1551
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Possible cause of trouble
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Fault remedy
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01290
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Power steering reference voltage short to positive/earth
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- Open circuit, short to positive/earth or loose contact in wiring between power steering sensor -G250 and power steering control unit -J500
- Power steering sensor defective
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- Check wiring, connectors
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01309
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Steering assistance control unit defective
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- Power steering control unit defective
- Loose connector 1, 2 or 3
- Open circuit in wiring to control unit
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- Replace control unit
=> Running Gear, Front-wheel Drive; Repair Group 4801-189
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01312
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Drive train data bus defective
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- Bus wires defective
- Fault in one of control units linked to data bus
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- Check data bus
Test step no. 6
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01314
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Engine control unit
No communication
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- Data bus defective
- Engine control unit defective
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- Check data bus
Test step no. 6
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Output on printer of V.A.G 1551
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Possible cause of trouble
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Fault remedy
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01317
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Control unit in dash panel insert
No communication
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- Data bus defective
- Open circuit in power supply to ABS with EDL control unit -J104
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- Check data bus =>Page
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