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Self diagnosis
Fault table
Notes:
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◆ The fault table is listed according to the 5 digit fault code on the left.
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◆ Before renewing components indicated as being faulty, check the wiring and connectors to these components as well as the earth connections using current flow diagram. This is particularly relevant if faults are output as "occurring sporadically" (SP).
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◆ For wiring check, refer also to "Electrical check",
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V.A.G 1551 print-out
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Possible fault cause
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Fault elimination
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No fault recognised!
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If a fault is present:
Fault not recognised by self diagnosis
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Continue fault finding using fault table in "Engine fault finding" binder.
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00281
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2231
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Road speed sender G68
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Dash panel insert printed circuit defective
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- Check road speed signal
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no signal
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Wiring open circuit
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If no display appears on electric speedometer:
Speedometer sender (G22) defective
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- Continue fault finding according to MFI fault finding programme in "Current flow diagrams, Electrical fault finding and Fitting locations" binder.
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Bei mechanischem Geschwindigkeitsmesser:
Geschwindigkeitsgeber (G54) am Schalttafeleinsatz defekt
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00282
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1232
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Throttle valve positioner V60
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Wiring open circuit
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- Check wiring together with V60
, Test step 9
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implausible signal
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V60 defective
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- Check V60
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V.A.G 1551 print-out
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Possible fault cause
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Fault elimination
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00515
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2113
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Hall sender G40
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G40 defective
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- Check G40
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no signal
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Wiring open circuit
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- Check wiring
, Test step 15
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00516
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2121
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Idling switch F60
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F60 defective, always closed
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- Check F60
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Short to earth
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Wiring has short to earth
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- Check wiring together with F60
, Test step 8
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Open circuit/short circuit to positive
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F60 defective, always open
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- Check F60
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Accelerator cable incorrectly adjusted
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- Adjust accelerator cable
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Wiring open circuit
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- Check wiring together with F60
, Test step 8
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V.A.G 1551 print-out
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Possible fault cause
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Fault elimination
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00518
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2212
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Throttle valve potentiometer G69
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Short to earth
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Wiring/G69 has short to earth
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- Check wiring and G69 for short to earth
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Open circuit/short to earth
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Wiring open circuit
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- Check wiring together with G69
, Test step16
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G69 defective
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Open circuit/short to earth
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Wiring open circuit
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- Check wiring and G69 for short to earth
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G69 defective
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- Check wiring together with G69
, Test step 16
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Short to positive
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Wiring open circuit
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- Check wiring together with G69
, Test step16
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G69 defective
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implausible signal
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G69 defective
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- Check G69
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V.A.G 1551 print-out
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Possible fault cause
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Fault elimination
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00522
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2312
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Coolant temperature sender
-G62
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G62 defective
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- Check wiring and G62 for short to earth
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Wiring has short to earth
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Open circuit/short to positive
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G62 defective
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- Check wiring together with G62
, Test step10
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Wiring open circuit
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For a sporadic fault and also implausible signal additionally:
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implausible signal
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G62 defective
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- Check G62
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00523
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2322
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Intake air temperature sender
G42
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G42 defective
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- Check wiring and G42 for short to earth
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Short to earth
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Wiring has short to earth
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Open circuit/short to positive
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G42 defective
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- Check wiring together with G42
, Test step 11
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Wiring open circuit
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V.A.G 1551 print-out
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Possible fault cause
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Fault elimination
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00525
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2342
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Lambda probe G39
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G39 defective
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- Renew G39
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No signal
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Wiring open circuit
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- Check wiring to G39
, Test step 13 and 14
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Short to earth
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G39 defective
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- Check wiring and G39 for short to earth
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Wiring has short to earth
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Short to positive
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G39 defective
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- Check wiring and G39 for short to positive
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Wiring has short to positive
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00532
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Supply voltage
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Signal too low
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Battery voltage below 10.0 V
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- Check battery
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V.A.G 1551 print-out
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Possible fault cause
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Fault elimination
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00537
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2341
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Lambda control1)
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Exhaust sytem leaking between cylinder head and catalyst
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- Check exhaust system
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Regulating limit exceeded
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Misfiring
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- Check ignition part components
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Fuel pressure to low
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- Check fuel pressure regulator
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Regulating limit not reached
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Fuel pressure to high
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Activated charcoal filter solenoid valve 1 N80 leaking, sticking
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- Check N80
, Final control diagnosis
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1)
After eliminating faults disconnect the Mono-Motronic control unit from the vehicle voltage supply 30 seconds after the ignition has been switched off: Either disconnect battery (obtain radio code) or pull the plug off the control unit. Disconnecting from vehicle voltage supply results in all learnt values reverting to old values (reset).
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V.A.G 1551 print-out
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Possible fault cause
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Fault elimination
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00561
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2413
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Mixture adaption1)
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Fuel pressure not OK
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- Check fuel pressure regulator
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Adaption limit exceeded
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Misfiring
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- Check ignition part components
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Adaption limit not reached
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Exhaust system leaking between cylinder head and catalyst
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- Check exhaust system
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00670
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Throttle valve positioner sender G127
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G127 defective
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- Check G127
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no signal
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Wiring open circuit
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1)
After eliminating faults disconnect the Mono-Motronic control unit from the vehicle voltage supply 30 seconds after the ignition has been switched off: Either disconnect battery (obtain radio code) or pull the plug off the control unit. Disconnecting from vehicle voltage supply results in all learnt values reverting to old values (reset).
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V.A.G 1551 print-out
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Possible fault cause
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Fault elimination
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65535
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1111
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Engine control unit blocked
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Attempted manipulation
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- Match engine electronic control unit to electronic immobilizer
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Electronic immobilizer defective
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- Check electronic immobilizer:
=> Repair group 96; Servicing electronic immobilizer
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65535
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1111
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Control unit defective
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Components in Mono-Motronic control unit (J257)
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- Renew J257
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<SOURCEMARKET>
</SOURCEMARKET>
<SOURCESYSTEM>
</SOURCESYSTEM>
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