|
|
|---|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
16705P0321
|
|
|
|
|
Engine speed sender -G28
|
|
|
|
|
|
Implausible signal
|
- G28 defective
- Gap speed sender/sender wheel too large
- Metal swarf on G28 or mounting loose
|
- Engine will not start
- Engine stops
- Glow period warning lamp flashes
- No indication on rev. counter
|
- Check G28
|
|
16706P0322
|
|
|
|
|
Engine speed sender -G28
|
|
|
|
|
|
No signal
|
- G28 defective
- Wiring open circuit or short circuit
|
- Engine will not start
- Engine stops
- Glow period warning lamp flashes
- Rev. counter no display
|
- Check G28
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
16885P0501
|
|
|
|
|
Road speed signal
|
|
|
|
|
|
Implausible signal
|
- No signal from speedometer sender (G22)
|
- Speedometer display not OK.
- Cruise control system switched off
- Vehicle jerks when selecting gear
- Air conditioner is switched off
|
- Check signal from G22:
=> Repair group 90; Checking speedometer sender
|
|
16989P0605
|
|
|
|
|
Control unit -J248 defective
|
- Control unit internally defective
|
- Various running problems
- Engine stops
|
- Replace J248
|
|
17552P1144
|
|
|
|
|
Air mass meter -G70
|
|
|
|
|
|
Open circuit/short to earth
|
- G70 defective
- Wiring open circuit or short to earth
|
- Reduced output
- Black smoke
|
- Check air mass meter
=> Page 23-89
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
17553P1145
|
|
|
|
|
Air mass meter -G70
|
|
|
|
|
|
Short to positive
|
- G70 defective
- Wiring open circuit or short to positive
|
- Reduced output
- Black smoke
|
- Check air mass meter
=> Page 23-89
|
|
17554P1146
|
|
|
|
|
Air mass meter -G70
|
|
|
|
|
|
Voltage supply
|
- Operating voltage to high or too low
- Wiring open circuit
|
- Reduced output
- Black smoke
|
- Check air mass meter
=> Page 23-89
|
|
17563P1155
|
|
|
|
|
Intake manifold pressure sender -G71
|
|
|
|
|
|
Short to positive
|
- Short to positive
- G71 defective
|
- Reduced output
|
- Check intake manifold pressure sender
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
17564P1156
|
|
|
|
|
Intake manifold pressure sender -G71
|
|
|
|
|
|
Open circuit/short to earth
|
- G71 defective
- Wiring open circuit or short to earth
|
- Reduced output
- Increased emission figures
|
- Check intake manifold pressure sender
|
|
17565P1157
|
|
|
|
|
Intake manifold pressure sender -G71
|
|
|
|
|
|
Voltage supply
|
- G71 defective
- Wiring open circuit or short circuit
|
- Reduced output
- Increased emission figures
|
- Check intake manifold pressure sender
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
17568P1160
|
|
|
|
|
Intake manifold temperature sender -G72
|
|
|
|
|
|
Short to earth
|
- G72 defective
- Wiring short to earth
|
- Goes to predetermined value 136.8 °C
|
- Check G72
|
|
17569P1161
|
|
|
|
|
Intake manifold temperature sender -G72
|
|
|
|
|
|
Open circuit/short to positive
|
- G72 defective
- Wiring open circuit or short to positive
|
- Goes to predetermined value 136.8 °C
|
- Check G72
|
|
17570P1162
|
|
|
|
|
Fuel temperature sender -G81
|
|
|
|
|
|
Short to earth
|
- G81 defective
- Wiring short to earth
|
- Increased emission figures
|
- Check G81
=> Page 23-56
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
17571P1163
|
|
|
|
|
Fuel temperature sender -G81
|
|
|
|
|
|
Open circuit/short to positive
|
- G81 defective
- Wiring open circuit or short to positive
|
- Increased emission figures
|
- Check G81
=> Page 23-56
|
|
17653P1245
|
|
|
|
|
Needle lift sender -G80
|
|
|
|
|
|
Short to earth
|
- G80 defective
- Wiring short to earth
|
- Glow period warning lamp flashes
- Engine running rough
- Reduced output
- Increased emission figures
|
- Check G80 => Page 23-68
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
17654P1246
|
|
|
|
|
Needle lift sender -G80
|
|
|
|
|
|
Implausible signal
|
- G80 defective
- Injector pipe to No. 3 Cyl. not OK
- Reduced fuel
- Air in fuel system
|
- Glow period warning lamp flashes
- Engine running rough
- Reduced output
- Increased emission figures
|
- Check G80 => Page 23-68
|
|
17655P1247
|
|
|
|
|
Needle lift sender -G80
|
|
|
|
|
|
Open circuit/short to positive
|
- G80 defective
- Wiring open circuit or short circuit
|
- Glow period warning lamp flashes
- Engine running rough
- Reduced output
- Increased emission figures
|
- Check G80 => Page 23-68
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
17656P1248
|
|
|
|
|
Injection commencement regulation
|
|
|
|
|
|
Control difference
|
- Commencement of injection valve (N108) defective
- Needle lift sender (G80) defective
- Fuel tank empty
- Fuel supply not OK., reduced fuel
- Start of delivery not OK.
|
- Engine running rough
- Reduced output
- Increased emission values
- Poor cold start characteristics
|
- Check N108
|
|
17659P1251
|
|
|
|
|
Commencement of injection valve -N108
|
|
|
|
|
|
Short to positive
|
- Short to positive
|
- Engine knocks at idling, because commencement of injection is constantly "advanced"
|
- Check N108
, Final control diagnosis
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
17660P1252
|
|
|
|
|
Commencement of injection valve -N108
|
|
|
|
|
|
Open circuit/short to earth
|
- Wiring open circuit
- Commencement of injection valve defective
|
- Engine knocks at idling, because commencement of injection is constantly "advanced"
|
- Check N108
, Final control diagnosis
|
|
|
|
- Short to earth
|
- Poor performance, because commencement of injection is constantly "retarded"
|
|
|
17663P1255
|
|
|
|
|
Coolant temperature sender -G62
|
|
|
|
|
|
Short to earth
|
- G62 defective
- Wiring short to earth
|
- Black smoke when starting
- Glow period is always approx. 20 seconds
|
- Check G62
|
|
17664P1256
|
|
|
|
|
Coolant temperature sender -G62
|
|
|
|
|
|
Open circuit/short to positive
|
- G62 defective
- Wiring open circuit or short to positive
|
- Black smoke when starting
- Glow period is always approx. 20 seconds
|
- Check G62
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
17762P1354
|
|
|
|
|
Modulating piston movement sender -G149
|
|
|
|
|
|
Electrical fault in current circuit
|
- Injection pump defective
- Wiring open circuit or short circuit
|
- Glow period warning lamp flashes
- Various running problems
- Engine stops
|
- Check G149
=> Page 23-61
|
|
17795P1387
|
|
|
|
|
Control unit defective
|
- Control unit internally defective
|
- Various running problems
- Engine stops
|
- Replace J248
|
|
17810P1402
|
|
|
|
|
Exhaust gas recirculation valve -N18
|
|
|
|
|
|
Short to positive
|
- Short to positive
|
- No exhaust gas recirculation
|
- Check N18
, Final control diagnosis
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
17849P1441
|
|
|
|
|
Exhaust gas recirculation valve -N18
|
|
|
|
|
|
Open circuit/short to earth
|
- Wiring open circuit
- Exhaust gas recirculation valve defective
|
- No exhaust gas recirculation
|
- Check N18
, Final control diagnosis
|
|
|
|
- Short to earth
|
- Too much exhaust gas recirculation
- Reduced output, black smoke
|
|
|
17946P1538
|
|
|
|
|
Fuel cut-off valve -N109
|
|
|
|
|
|
Open circuit/short to earth
|
- N109 defective
- Wiring open circuit or short to earth
|
- Reduced output
- Engine stops
|
- Check N109
, final control diagnosis
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
17948P1540
|
|
|
|
|
Road speed signal
|
|
|
|
|
|
Signal too large
|
- Road speed more than 260 km/h
- Dash panel insert defective
|
- Cruise control system not OK
- Cruise control system switched off
- Vehicle jerks when selecting gear
- Air conditioner is switched off
|
- Check signal from G22
|
|
17954P1546
|
|
|
|
|
Charge pressure control solenoid valve -N75
|
|
|
|
|
|
Short to positive
|
- Short to positive
|
- Reduced output
- Charge pressure too low
|
- Check N75
, Final control diagnosis
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
17957P1549
|
|
|
|
|
Charge pressure control solenoid valve -N75
|
|
|
|
|
|
Open circuit/short to earth
|
- Wiring open circuit
- Solenoid valve defective
|
- Reduced output
- Charge pressure too low
|
- Check N75
, Final control diagnosis
|
|
|
|
- Short to earth
|
- Reduced output
- Charge pressure too high
|
|
|
17958P1550
|
|
|
|
|
Charge pressure
|
|
|
|
|
|
Control difference
|
- Charge pressure control solenoid valve (N75) defective
- Hose connections interchanged, not connected
- Leaks between turbocharger and engine (routing through ducting/cooler)
- Turbocharger defective
|
- Reduced output
|
- Check N75
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
17969P1561
|
|
|
|
|
Metering adjuster -N146
|
|
|
|
|
|
Control difference
|
- Injection pump defective
- Wiring open/short circuit
|
- Pre glow warning lamp flashes
- Various running problems
- Engine stops
|
- Check N146
|
|
17970P1562
|
|
|
|
|
Metering adjuster -N146
|
|
|
|
|
|
Upper stop value
|
- Metering control (N146) defective/blocked
Upper stop value obtained
|
- Reduced output
Jerking
|
- Check N146
|
|
17971P1563
|
|
|
|
|
Metering adjuster -N146
|
|
|
|
|
|
Lower stop value
|
- Metering device (N146) defective/blocked
Lower stop value obtained
|
- Black smoke
Rough idling
|
- Check N146
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
17978P1570
|
|
|
|
|
Engine control unit
blocked
|
- Start attempted with a non-authorised key.
- Attempted manipulation
- Short in communication wire
- Incorrect coding
- Fault in immobilizer system
- Immobilizer control unit defective/missing
- Engine control unit has been replaced and not matched to the immobilizer.
|
- Engine starts briefly and then stops again
- Glow period warning lamp flashes
|
- Match engine control unit to electronic immobilizer => Page 23-112
Check electronic immobilizer:
=> Repair group 96; Servicing electronic immobilizer
|
|
18008P1600
|
|
|
|
|
Voltage supply terminal 15
|
|
|
|
|
|
Implausible signal
|
- No current supply when ignition is on (terminal 15)
|
- Various running problems including engine will not start
|
- Check voltage supply for terminal 15
=> Current flow diagrams, Electrical fault finding and Fitting locations binder
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
18026P1618
|
|
|
|
|
Glow plug relay -J52
|
|
|
|
|
|
Short to positive
|
- Wiring short to positive
- J52 defective
|
- No glow period
- Poor cold starting
- Glow period warning lamp (K29) flashes
|
- Check J52
, Final control diagnosis
|
|
18027P1619
|
|
|
|
|
Glow plug relay -J52
|
|
|
|
|
|
Open circuit/short to earth
|
- Wiring open circuit or short to earth
- J52 defective
|
- No glow period
- Poor cold starting
- Glow period warning lamp (K29) flashes
|
- Check J52
=> Page 01-51, Final control diagnosis
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
18039P1631
|
|
|
|
|
Accelerator position sender -G79
|
|
|
|
|
|
Signal too large
|
- G79 defective
|
- Increased idling speed
|
- Check G79 and adjust
|
|
18040P1632
|
|
|
|
|
Accelerator position sender -G79
|
|
|
|
|
|
Voltage supply
|
- Operating voltage too high or too low
- Wiring open circuit
|
- Glow period warning lamp flashes
- Increased idling speed
|
- Check G79 and adjust
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
18047P1639
|
|
|
|
|
Accelerator position sender 1/2
-G79+G1851)
|
|
|
|
|
|
Implausible signal
|
- G79 defective
|
- Increased idling speed
|
- Check G79 and adjust
|
|
18048P1640
|
|
|
|
|
Control unit -J248 defective
|
- Control unit internally defective
|
- Various running problems
- Engine stops
|
- Replace J248
|
|
65535
|
|
|
|
|
Control unit -J248 defective
|
- Control unit internally defective
|
- Various running problems
- Engine stops
|
- Replace J248
|
