|
Self diagnosis
Fault table
Notes:
-
◆ The fault table is listed according to the 5 digit fault code on the left.
-
◆ Explanation of the fault types (e.g. "open circuit/short circuit to earth"):
=> Fault reader operating instructions
-
◆ If components are indicated as being defective:
First check the wiring and connections to these components as well as the system earth connections according to current flow diagram. Only when no fault can be found, renew component. This is particularly relevant if the faults are indicated as "occurring sporadically" (SP).
|
|
|---|
|
V.A.G 1551 print-out
|
Possible fault cause
|
Fault elimination
|
|
No fault recognised!
|
If a fault is present:
Fault not recognised by self diagnosis
|
Continue fault finding using fault table in "Engine fault finding" binder.
|
|
00282
|
|
|
|
Speed sender G68
|
Speedometer (G21) defective
|
- Check speed signal
|
|
|
no signal
|
Wiring open circuit
|
|
|
|
If no display appears on speedometer:
Speedometer sender (G22) defective
|
- Continue fault finding according to MFI fault finding programme in "Current flow diagram, Electrical fault finding and Fitting locations" binder.
|
|
00282
|
|
|
|
Throttle valve positioner V60
|
Wiring open circuit
|
- Check V60
|
|
|
implausible signal
|
V60 defective
|
|
|
V.A.G 1551 print-out
|
Possible fault cause
|
Fault elimination
|
|
00515
|
|
|
|
Hall sender G40
|
G40 defective
|
- Check G40
|
|
|
no signal
|
Wiring open circuit
|
|
|
|
Signal outside the tolerance
|
Transfer resistance or loose contacts in the wiring
|
- Check wiring and wiring connections according to current flow diagram
|
|
00516
|
|
|
|
Idling switch F60
|
F60 defective, always closed
|
- Check F60
|
|
|
Short to earth
|
Wiring has short to earth
|
|
|
|
Open circuit/short circuit to positive
|
F60 defective, always open
|
- Check F60
|
|
|
Wiring open circuit
|
|
|
|
Accelerator cable incorrectly adjusted
|
- Adjust accelerator cable
=> Repair Group 20; Removing and installing parts of the fuel supply system; adjusting accelerator cable
|
|
|
|---|
|
V.A.G 1551 print-out
|
Possible fault cause
|
Fault elimination
|
|
00518
|
|
|
|
Throttle valve potentiometer G69
|
|
|
|
|
Short to earth
|
Wiring/G69 has short to earth
|
- Check G69
|
|
|
Open circuit/short to earth
|
Wiring open circuit
|
|
|
|
G69 defective
|
|
|
|
Open circuit/short to earth
|
Wiring open circuit
|
|
|
|
G69 defective
|
|
|
|
Short to positive
|
Wiring open circuit
|
|
|
|
G69 defective
|
|
|
|
implausible signal
|
G69 defective
|
|
|
|
|---|
|
V.A.G 1551 print-out
|
Possible fault cause
|
Fault elimination
|
|
00522
|
|
|
|
Coolant temperature sender
-G62
|
G62 defective
|
- Check G62
|
|
|
|
Wiring has short to earth
|
|
|
|
Open circuit/short to positive
|
G62 defective
|
|
|
|
Wiring open circuit
|
|
|
|
implausible signal
|
G62 defective
|
|
|
00523
|
|
|
|
Intake air temperature sender
G42
|
G42 defective
|
- Check G42
|
|
|
Short to earth
|
Wiring has short to earth
|
|
|
|
Open circuit/short to positive
|
G42 defective
|
|
|
|
Wiring open circuit
|
|
|
|
|---|
|
V.A.G 1551 print-out
|
Possible fault cause
|
Fault elimination
|
|
00524
|
|
|
|
|
Knock sensor 1 G61
|
Wiring open circuit/short circuit in sensor wiring
|
- Check G61
|
|
|
No signal
|
G61 defective
|
- Renew G61
|
|
00525
|
|
|
|
Lambda probe G39
|
G39 defective
|
- Check Lambda probe and Lambda control
|
|
|
No signal
|
Wiring open circuit
|
|
|
|
Short to earth
|
G39 defective
|
|
|
|
Wiring has short to earth
|
|
|
|
Short to positive
|
G39 defective
|
|
|
|
Wiring has short to positive
|
|
|
|
|---|
|
V.A.G 1551 print-out
|
Possible fault cause
|
Fault elimination
|
|
00537
|
|
|
|
Lambda control1)
|
Lambda probe heating defective
|
- Check probe heating voltage supply
|
|
|
Regulating limit exceeded
|
|
- Check probe heating for continuity
|
|
|
Exhaust system leaking between cylinder head and catalyst
|
- Check exhaust system
|
|
|
Misfiring
|
- Check ignition part components
|
|
|
Fuel pressure to low
|
- Check fuel pressure regulator
|
|
|
Regulating limit not reached
|
Fuel pressure to high
|
|
|
|
Activated charcoal filter solenoid valve 1 N80 leaking, sticking
|
- Check N80
; Final control diagnosis
|
1)
After repairing faults the Lambda control values learnt by the Mono Motronic control unit must be erased, to do this on
Engine code ABD, ABU:
After switching off the ignition separate Mono Motronic control unit from vehicle electrical system for 30 seconds: Either disconnect battery (obtain radio code) or pull connector off control unit.
Engine code AEA: => Page 01-26
; Erasing values learnt by engine electronics control unit.
|
|
|---|
|
V.A.G 1551 print-out
|
Possible fault cause
|
Fault elimination
|
|
00561
|
|
|
|
Mixture adaption1)
|
Fuel pressure not OK
|
- Check fuel pressure regulator
|
|
|
Adaption limit exceeded
|
Misfiring
|
- Check ignition part components
|
|
|
Adaption limit not reached
|
|
|
|
|
Exhaust system leaking between cylinder head and catalyst
|
- Check exhaust system
|
|
00670
|
|
|
|
Throttle valve positioner sender G127
|
G127 defective
|
- Check G127
|
|
|
no signal
|
Wiring open circuit
|
|
1)
After repairing faults the Lambda control values learnt by the Mono Motronic control unit must be erased, to do this on
Engine code ABD, ABU:
After switching off the ignition separate Mono Motronic control unit from vehicle electrical system for 30 seconds: Either disconnect battery (obtain radio code) or pull connector off control unit.
Engine code AEA: => Page 01-26
; Erasing values learnt by engine electronics control unit.
|
|
|---|
|
V.A.G 1551 print-out
|
Possible fault cause
|
Fault elimination
|
|
17978
|
|
|
|
|
Engine control unit blocked
|
The electronic immoblizer control unit (J362) has blocked the Mono Motronic control unit
|
- Match the engine electronic control unit to the electronic immobilizer
Check electronic immobilizer:
=> Repair group 96; Servicing electronic immobilizer
Then start engine and erase the engine control unit fault memory
|
|
65535
|
|
|
|
Control unit defective
|
Components in Mono Motronic control unit (J257)
|
- Renew J257
, item 2
|
| 
