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Self-diagnosis
Fault table
Notes:
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◆ The fault tables are listed according to the 5 digit fault code on the left.
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◆ Explanation of the fault types (e.g. "open circuit/short circuit to earth"):
=> Fault reader operating instructions
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◆ If components are indicated as faulty:
First check the wiring and connectors to these components as well as the system earth connections according to current flow diagram. This is particularly relevant if faults are output as "occurring sporadically" (SP).
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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No fault recognized!
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If a complaint exists:
Fault not recognised during self-diagnosis
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---
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Continue fault finding according to fault table, in "Engine fault finding" binder.
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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00282
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Throttle valve positioner -V601)
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Output does not switch/short to earth
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- Wire(s) to positioning motor, short to earth
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- Cold starting problem
- Cold idling speed problems
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- Check V60
, checking throttle valve control part
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Output does not switch/short to positive
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- Wire(s) to positioning motor, short to battery positive
- Wire(s) open circuit
- Idling speed control control limit exceeded
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- Hard load changes
- Idling speed problems
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Short circuit
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- Short between wiring to positioning motor
- Short in positioning motor
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1)
The throttle valve positioner (V60) is a component of the throttle valve control part (J338).
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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00516
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Idling switch -F601)
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Short to earth
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- Wire short to earth
- F60 defective
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- Idling speed problems
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- Perform basic setting
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Open circuit/short to positive
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- Wiring open circuit in earth wire
- Wire short to positive
- F60 defective
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- Driving characteristic problems when driving off
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- Check F60
, checking throttle valve control part
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00518
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Throttle valve potentiometer -G692)
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Short to earth
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- Wire short to earth
- G69 defective
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- Poor throttle response
- Hard load changes
- Increased emission values
- No full throttle recognition
- Loss of output and torque
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- Perform basic setting
, Checking throttle valve control part
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Open circuit/short to positive
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- Wiring open circuit in earth wire
- Wire short to positive
- G69 defective
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1)
The idling speed switch (F60) is a component of the throttle valve control part (J338).
2)
The throttle valve potentiometer (G69) is a component of the throttle valve control part (J338).
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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00519
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Intake manifold pressure sender -G71
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Short to earth
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- Wire short to earth
- G71 defective
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- Increased emission values
- Poor throttle response
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- Check G71
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Open circuit/short to positive
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- Wire open circuit in earth wire
- Wire short to positive
- G71 defective
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- Hard load changes
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Signal too small
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- G71 defective
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- Increased emission values
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- Renew G71
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Signal too large
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- G71 defective
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- Poor throttle response
- Engine running problems
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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00522
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Coolant temperature sender -G62
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Short to earth
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- Wire short to earth
- G62 defective
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- Poor cold starting
- Poor hot starting
- No idling speed adaption
- Increased emission values
- Increased fuel consumption
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- Check G62
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Open circuit/short to positive
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- Wire open circuit in earth wire
- Wire short to positive
- G62 defective
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- Poor hot starting
- Increased emissions values
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00523
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Intake air temperature sender -G42
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Short to earth
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- Wiring has short to earth
- G42 defective
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- Poor hot starting
- Increased emissions values
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- Check G42
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Open circuit/short to positive
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- Wire open circuit in earth wire
- Wire short to positive
- G42 defective
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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00524
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Knock sensor 1 -G61
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Open circuit/short to earth
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- Wire open circuit or short to earth
- G61 defective
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- Ignition timing retarded approx. 12 < °
- Reduced output
- Increased fuel consumption
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- Check G61
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00525
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Lambda probe -G39
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no signal
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- Wire open circuit
- G39 defective
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- No Lambda control
- Fuel odours
- Increased fuel consumption
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- Check Lambda probe and Lambda control
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Short to earth
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- Wire short to earth
- G39 defective
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- Engine running problems
- Increased emission values
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Short to positive
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- Wire short to positive
- G39 defective
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=> 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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Possible effects
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Fault remedy
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00530
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Throttle valve positioner/potentiometer -G881)
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Open circuit/short to positive
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- Wire open circuit in earth wire
- Wire short to positive
- G88 defective
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- Cold starting problems
- Idling speed not within tolerances
- Cold idling problems
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- Check G88
, checking throttle valve control part
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Short to earth
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- Wiring has short to earth
- G88 defective
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- Uneven idling speed
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00532
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Supply voltage
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Signal too large
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- Battery voltage above 16 V
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---
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- Check alternator
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Signal too small
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- Battery voltage below10 V
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- Idling speed is increased
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- Check battery charge condition
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1)
The throttle valve positioner/potentiometer (G88) is a component of the throttle valve control part (J338).
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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00533
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Idling speed control
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Control limit exceeded
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- Wire open circuit to throttle valve positioner -V60
- Upper or lower idling speed limit reached
- V60 stuck
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- Idling speed not within tolerances
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- Check V60
, checking throttle valve control part
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Adaption limit exceeded
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- Throttle valve housing of throttle valve control part dirty
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- Idling speed not within tolerances
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- Clean throttle valve control part throttle valve housing
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Adaption limit not reached
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- Intake system leaking
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- Idling speed not within tolerances
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- Check intake system for leaks (unmetered air) => Page 24-72
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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00537
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Lambda control
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Control limit exceeded
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- Exhaust system between cylinder head and catalyst leaking
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- Increased emission values
- Increased fuel consumption
- Engine running problems
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- Check exhaust system:
=> Repair group 26; Removing and installing parts of exhaust system
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- Misfiring
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- Check components of ignition part => Page 28-1
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- Injector(s) (N30...N33) defective
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- Check N30...N33
=> Page 24-64
, check injectors
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- Fuel pressure too low
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- Check fuel pressure regulator => Page 24-68
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- Insufficient fuel in fuel tank
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- Fill with fuel
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- Intake system leaking
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- Check intake system for leaks (unmetered air) => Page 24-72
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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Continued
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- Solenoid valve1 for activated charcoal filter (N80) stuck (always open)
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- Check N80
=> Page 01-26
, Final control diagnosis
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- Lambda probe (G39) defective
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- Check Lambda probe and Lambda control
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Control limit not attained
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- Fuel pressure too high
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- Increased emission values
- Engine running problems
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- Check fuel pressure regulator
=> Page 24-68
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- Injector(s) (N30...N33) defective
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- Check N30...N33
=> Page 24-64
, checking injectors
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- Lambda probe (G39) defective
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- Check Lambda probe and Lambda control
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00543
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Maximum revs exceeded
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- Speed above 6520 rpm (e.g. selector fault)
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- Possible damage to valves and pistons (contact)
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- Check engine for damage and erase fault memory
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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00561
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Mixture adaptation
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Adaption limit (+) exceeded
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As 00537, Lambda control
But for fault finding the following must be observed:
- Faults in Lambda control are recognized after a brief change to the system, e.g. disconnected vacuum hose.
- Faults in mixture adaption are only recognized after a long period of change to the system, e.g. wear of individual components.
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Adaptation limit (+) not reached
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Adaptation limit (x) exceeded
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Adaptation limit (x) not reached
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00625
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Speed signal
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implausible signal
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- No signal from speed sensor (G21) or speedometer sender (G22)
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- Speedometer display not OK.
- Engine running problems
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- Check signal from G21 or G22
, Checking speed signal
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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01087
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Basic setting not completed
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Fault in basic setting
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- The engine control unit is not matched to throttle valve control part
- The basic setting has not been carried out to completion, because e.g. during the operation the starter has been operated or throttle valve sticks
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- Idling speed not within tolerances
- Idling speed fluctuates
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- Perform basic setting
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01247
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Activated charcoal filter solenoid valve 1 -N80
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defective
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- N80 defective
- Wiring open circuit
- Wiring short circuit
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- Fuel odours
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- Check N80
=> Page 01-26
, Final control diagnosis
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- Hose from N80 to activated charcoal filter blocked
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- Check hose
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V.A.G 1551 print-out
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Possible causes of fault
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Possible effects
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Fault remedy
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01249
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No.1 cyl. injector -N30
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Short to positive
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- Wire to control unit has short to battery positive
- Injector defective, short circuit
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- Increased emission values
- Poor starting
- Engine running problems
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- Check N30...N33
=> Page 24-64
, checking injectors
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Short to earth
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- Wire to control unit has short to earth
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- Poor throttle response
- Uneven idling speed
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Open circuit/short to positive
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- Wire open circuit to control unit
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01250
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No. 2 cyl. injector -N31
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Short to positive
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see fault code 01249, Cyl. 1
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Output on V.A.G 1551 printer
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Possible causes of fault
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Possible effects
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Fault remedy
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01251
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No. 3 cyl. injector -N32
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Short to positive
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see fault code 01249, Cyl. 1
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01252
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No. 4 cyl. injector -N33
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Short to positive
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see fault code 01249, Cyl. 1
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Output on V.A.G 1551 printer
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Possible causes of fault
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Possible effects
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Fault remedy
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17978
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Engine control unit blocked
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- Attempted manipulation
- Short in communication cable
- Incorrect coding
- Immobilizer control unit defective/missing
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- Engine starts briefly and then stops again
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- Adapt engine control unit to electronic immobilizer => Page 24-61
Check electronic immobilizer:
=> Repair group 96; Servicing electronic immobilizer
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65535
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Control unit defective
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- Control unit internally defective
- Attempted manipulation of control unit
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- Engine running problems
- Engine will not start/stopped
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- Renew J220
=> Page 24-11
, item 28
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