|
Interrogating and erasing fault memory
Fault codes 17514 - 18020
|
Output on V.A.G 1551 printer
|
Possible cause of fault
|
Possible effects
|
Fault rectification
|
|
17514
|
|
|
|
|
Bank 2 - Probe 1
|
|
|
|
|
|
Voltage too low/leakage air
|
=>Bank 1, probe 1
Fault code 17509
|
=>Bank 1, probe 1
Fault code 17509
|
=>Bank 1, probe 1
Fault code 17509
|
|
17609
|
|
|
|
|
Injector, cylinder 1 -N30
|
|
|
|
|
|
Electrical fault in circuit
|
▪ Lambda control is deactivated at the same time
▪ If this fault is stored for all 6 injectors, fault 17908 is stored as well
|
|
|
|
- Open circuit or short to earth between - N30 and engine control unit
- Fault in power supply to -N30
- -N30 defective
|
- Irregular engine running
|
- Check injectors
.
|
|
|
|
- Faulty signal input in engine control unit (control unit defective)
|
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- Renew engine control unit .
|
|
|
|---|
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Output on V.A.G 1551 printer
|
Possible cause of fault
|
Possible effects
|
Fault rectification
|
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17610
|
|
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Injector, cylinder 2 -N31
|
|
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Electrical fault in circuit
|
=>Injector, cylinder 1 -N30
Fault code 17609
|
=>Injector, cylinder 1 -N30
Fault code 17609
|
=>Injector, cylinder 1 -N30
Fault code 17609
|
|
17611
|
|
|
|
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Injector, cylinder 3 -N32
|
|
|
|
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Electrical fault in circuit
|
=>Injector, cylinder 1 -N30
Fault code 17609
|
=>Injector, cylinder 1 -N30
Fault code 17609
|
=>Injector, cylinder 1 -N30
Fault code 17609
|
|
17612
|
|
|
|
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Injector, cylinder 4 -N33
|
|
|
|
|
|
Electrical fault in circuit
|
=>Injector, cylinder 1 -N30
Fault code 17609
|
=>Injector, cylinder 1 -N30
Fault code 17609
|
=>Injector, cylinder 1 -N30
Fault code 17609
|
|
Output on V.A.G 1551 printer
|
Possible cause of fault
|
Possible effects
|
Fault rectification
|
|
17613
|
|
|
|
|
Injector, cylinder 5 -N83
|
|
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|
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|
Electrical fault in circuit
|
=>Injector, cylinder 1 -N30
Fault code 17609
|
=>Injector, cylinder 1 -N30
Fault code 17609
|
=>Injector, cylinder 1 -N30
Fault code 17609
|
|
17614
|
|
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Injector, cylinder 6 -N84
|
|
|
|
|
|
Electrical fault in circuit
|
=>Injector, cylinder 1 -N30
Fault code 17609
|
=>Injector, cylinder 1 -N30
Fault code 17609
|
=>Injector, cylinder 1 -N30
Fault code 17609
|
|
17621
|
|
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|
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Injector, cylinder 1 -N30
|
|
|
|
|
|
Short to positive
|
At the same time, the injector concerned is no longer actuated until ignition is switched off and the lambda control is deactivated.
|
|
|
|
- Short to positive between -N30 and engine control unit
- -N30 defective
|
- Irregular engine running
- No full throttle enrichment
|
- Check injectors
.
|
|
|
|
- Faulty signal input in engine control unit (control unit defective)
|
|
- Renew engine control unit .
|
|
Output on V.A.G 1551 printer
|
Possible cause of fault
|
Possible effects
|
Fault rectification
|
|
17622
|
|
|
|
|
Injector, cylinder 2 -N31
|
|
|
|
|
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Short to positive
|
=>Injector, cylinder 1 -N30
Fault code 17621
|
=>Injector, cylinder 1 -N30
Fault code 17621
|
=>Injector, cylinder 1 -N30
Fault code 17621
|
|
17623
|
|
|
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|
Injector, cylinder 3 -N32
|
|
|
|
|
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Short to positive
|
=>Injector, cylinder 1 -N30
Fault code 17621
|
=>Injector, cylinder 1 -N30
Fault code 17621
|
=>Injector, cylinder 1 -N30
Fault code 17621
|
|
17624
|
|
|
|
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Injector, cylinder 4 -N33
|
|
|
|
|
|
Short to positive
|
=>Injector, cylinder 1 -N30
Fault code 17621
|
=>Injector, cylinder 1 -N30
Fault code 17621
|
=>Injector, cylinder 1 -N30
Fault code 17621
|
|
|
|---|
|
Output on V.A.G 1551 printer
|
Possible cause of fault
|
Possible effects
|
Fault rectification
|
|
17625
|
|
|
|
|
Injector, cylinder 5 -N83
|
|
|
|
|
|
Short to positive
|
=>Injector, cylinder 1 -N30
Fault code 17621
|
=>Injector, cylinder 1 -N30
Fault code 17621
|
=>Injector, cylinder 1 -N30
Fault code 17621
|
|
17626
|
|
|
|
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Injector, cylinder 6 -N84
|
|
|
|
|
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Short to positive
|
=>Injector, cylinder 1 -N30
Fault code 17621
|
=>Injector, cylinder 1 -N30
Fault code 17621
|
=>Injector, cylinder 1 -N30
Fault code 17621
|
|
Output on V.A.G 1551 printer
|
Possible cause of fault
|
Possible effects
|
Fault rectification
|
|
17733
|
|
|
|
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Knock control, cylinder 1
|
|
|
|
|
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Control limit reached
|
Stored if ignition timing is fully retarded for more than 180 seconds whilst driving
|
|
|
|
- Poor quality fuel (less than RON 95)
|
- High fuel consumption
- Loss of power
|
- Fill up with petrol of at least RON 95
|
|
|
|
- Knock control module in engine control unit defective (control unit defective)
|
- Irregular engine running
- Maximum speed is not reached
|
- Renew engine control unit .
|
|
|
|
- Abnormal engine noise (ancillaries loose)
- Open circuit in knock sensor screen wiring
- Loose contact in the connector
|
|
- Reading measured value block, display group 013 or 014
|
|
|
|
- Knock sensor not tightened to correct torque
|
|
- Tightening torque for knock sensor: 20 Nm
|
|
Output on V.A.G 1551 printer
|
Possible cause of fault
|
Possible effects
|
Fault rectification
|
|
17734
|
|
|
|
|
Knock control, cylinder 2
|
|
|
|
|
|
Control limit reached
|
=> Knock control, cylinder 1
Fault code 17733
|
=> Knock control, cylinder 1
Fault code 17733
|
=> Knock control, cylinder 1
Fault code 17733
|
|
17735
|
|
|
|
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Knock control, cylinder 3
|
|
|
|
|
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Control limit reached
|
=> Knock control, cylinder 1
Fault code 17733
|
=> Knock control, cylinder 1
Fault code 17733
|
=> Knock control, cylinder 1
Fault code 17733
|
|
17736
|
|
|
|
|
Knock control, cylinder 4
|
|
|
|
|
|
Control limit reached
|
=> Knock control, cylinder 1
Fault code 17733
|
=> Knock control, cylinder 1
Fault code 17733
|
=> Knock control, cylinder 1
Fault code 17733
|
|
17737
|
|
|
|
|
Knock control, cylinder 5
|
|
|
|
|
|
Control limit reached
|
=> Knock control, cylinder 1
Fault code 17733
|
=> Knock control, cylinder 1
Fault code 17733
|
=> Knock control, cylinder 1
Fault code 17733
|
|
Output on V.A.G 1551 printer
|
Possible cause of fault
|
Possible effects
|
Fault rectification
|
|
17738
|
|
|
|
|
Knock control, cylinder 6
|
|
|
|
|
|
Control limit reached
|
=> Knock control, cylinder 1
Fault code 17733
|
=> Knock control, cylinder 1
Fault code 17733
|
=> Knock control, cylinder 1
Fault code 17733
|
|
17747
|
|
|
|
|
Crankshaft position sensor/engine speed sensor
|
|
|
|
|
|
Interchanged
|
▪ Stored if ignition timing sender -G4 and engine speed sender -G28 have been interchanged
▪ If -G4 and -G28 have been interchanged, fault 16706 is stored as well
|
|
|
|
- 3-way connectors of the ignition timing sender -G4 (crankshaft sensor) and engine speed sender -G28 interchanged
|
- Engine will not start (no ignition and injection)
|
- Attach 3-way connector properly
|
|
|
|---|
|
Output on V.A.G 1551 printer
|
Possible cause of fault
|
Possible effects
|
Fault rectification
|
|
17748
|
|
|
|
|
Camshaft/crankshaft position sensor
|
|
|
|
|
|
Incorrect assignment
|
▪ Stored if, at an engine speed of 50... 2000 rpm, Hall sender signal is always "high" for more than 15 detected crankshaft sensor signals
▪ Fault 17800 is stored at the same time
|
|
|
|
- Incorrect valve timing (toothed belt skipped)
|
- If fault occurs before starting engine:
- Engine will not start (no ignition and injection)
- If fault occurs after starting engine:
- Fault is stored
- No engine power at full throttle
|
- Check valve timing
|
|
|
|
- Hall sender rotor ring incorrectly fitted or loose
|
|
- Perform visual inspection
|
|
Output on V.A.G 1551 printer
|
Possible cause of fault
|
Possible effects
|
Fault rectification
|
|
17749
|
|
|
|
|
Ignition output 1
|
|
|
|
|
|
Short to earth
|
- Short to earth between output stage -N122 and engine control unit
- -N122 defective
|
- Corresponding injectors are deactivated (no injection)
- Lambda control switches to open loop control
- Loss of power (no full throttle enrichment)
|
- Check -N122
|
|
|
|
- Signal output in engine control unit defective (control unit defective)
|
|
- Renew engine control unit .
|
|
17751
|
|
|
|
|
Ignition output 2
|
|
|
|
|
|
Short to earth
|
=>Ignition output 1
Fault code 17749
|
=>Ignition output 1
Fault code 17749
|
=>Ignition output 1
Fault code 17749
|
|
|
|---|
|
Output on V.A.G 1551 printer
|
Possible cause of fault
|
Possible effects
|
Fault rectification
|
|
17753
|
|
|
|
|
Ignition output 3
|
|
|
|
|
|
Short to earth
|
=>Ignition output 1
Fault code 17749
|
=>Ignition output 1
Fault code 17749
|
=>Ignition output 1
Fault code 17749
|
|
17799
|
|
|
|
|
Bank 2, camshaft position sensor
|
|
|
|
|
|
Short to earth
|
Stored if, at an engine speed of 25... 2000 rpm, Hall sender signal is always "low" for more than 3 detected crankshaft sensor signals
|
|
|
|
- Short to earth between Hall sender -G40 and engine control unit
- -G40 defective
|
- Engine will not start/cuts out (no ignition and injection)
|
- -Check -G40 => Page 28-39
|
|
|
|
- Faulty signal input in engine control unit (control unit defective)
|
|
- Renew engine control unit .
|
|
Output on V.A.G 1551 printer
|
Possible cause of fault
|
Possible effects
|
Fault rectification
|
|
17800
|
|
|
|
|
Bank 2, camshaft position sensor
|
|
|
|
|
|
Short to positive
|
▪ Stored if, at an engine speed of 50... 2000 rpm, Hall sender signal is always "high" for more than 15 detected crankshaft sensor signals
▪ Fault 17748 is stored at the same time
|
|
|
|
- Open circuit or short to positive between Hall sender -G40 and engine control unit
- Fault in power supply or earth supply for -G40
- -G40 defective
|
- If fault occurs before starting engine:
- Engine will not start (no ignition and injection)
- If fault occurs after starting engine:
- Fault is stored
|
- Check -G40 => Page 28-39
|
|
|
|
- Faulty signal input in engine control unit (control unit defective)
|
|
- Renew engine control unit .
|
|
|
|---|
|
Output on V.A.G 1551 printer
|
Possible cause of fault
|
Possible effects
|
Fault rectification
|
|
17801
|
|
|
|
|
Ignition output 1
|
|
|
|
|
|
Electrical fault in circuit
|
- Open circuit or short to positive between output stage -N122 and engine control unit
- -N122 defective
|
- Corresponding injectors are deactivated (no injection)
- Lambda control switches to open loop control
- Loss of power (no full throttle enrichment)
|
- Check -N122 => Page 28-11
|
|
|
|
- Signal output in engine control unit defective (control unit defective)
|
|
- Renew engine control unit .
|
|
Output on V.A.G 1551 printer
|
Possible cause of fault
|
Possible effects
|
Fault rectification
|
|
17802
|
|
|
|
|
Ignition output 2
|
|
|
|
|
|
Electrical fault in circuit
|
=>Ignition output 1
Fault code 17801
|
=>Ignition output 1
Fault code 17801
|
=>Ignition output 1
Fault code 17801
|
|
17803
|
|
|
|
|
Ignition output 3
|
|
|
|
|
|
Electrical fault in circuit
|
=>Ignition output 1
Fault code 17801
|
=>Ignition output 1
Fault code 17801
|
=>Ignition output 1
Fault code 17801
|
|
Output on V.A.G 1551 printer
|
Possible cause of fault
|
Possible effects
|
Fault rectification
|
|
17808
|
|
|
|
|
EGR valve -N18
|
|
|
|
|
|
Electrical fault in circuit
|
Stored if, after starting engine, control unit output of EGR valve -N18 is "low" for more than 1 second under the following conditions: Engine speed less than 900 rpm, engine load less than 25%, EGR duty cycle less than 20%
|
|
|
|
- Power supply for
- -N18 defective
- Open circuit or short to earth between -N18 and engine control unit
- -N18 defective
|
- Rough idling
|
- Reading measured value block, display group 017
|
|
|
|
- Signal output in engine control unit defective (control unit defective)
|
|
- Renew engine control unit .
|
|
|
|---|
|
Output on V.A.G 1551 printer
|
Possible cause of fault
|
Possible effects
|
Fault rectification
|
|
17810
|
|
|
|
|
EGR valve -N18
|
|
|
|
|
|
Short to positive
|
Stored if, after starting engine, control unit output of EGR valve -N18 is "low" for more than 1 second under the following conditions: Engine speed 1000 ... 3500 rpm, engine load 33... 66%, EGR duty cycle greater than 30%
|
|
|
|
- Short to positive between -N18 and engine control unit
- -N18 defective
|
|
- Reading measured value block, display group 017
|
|
|
|
- Signal output in engine control unit defective (control unit defective)
|
|
- Renew engine control unit .
|
|
Output on V.A.G 1551 printer
|
Possible cause of fault
|
Possible effects
|
Fault rectification
|
|
17815
|
|
|
|
|
EGRtemperature sensor -G98
|
|
|
|
|
|
Signal too low
|
Stored if EGR temperature signal greater than 200 °C is received for 3 seconds after starting engine under the following condition: Coolant temperature less than 30 °C
|
|
|
|
- Short to earth between -G98 and engine control unit
- -G98 defective
|
|
- Reading measured value block, display group 017
|
|
|
|
- Faulty signal input in engine control unit (control unit defective)
|
|
- Renew engine control unit .
|
|
|
|---|
|
Output on V.A.G 1551 printer
|
Possible cause of fault
|
Possible effects
|
Fault rectification
|
|
17816
|
|
|
|
|
EGRtemperature sensor -G98
|
|
|
|
|
|
Signal too high
|
Stored if EGR temperature signal is less than 5 °C for more than 45 seconds under the following conditions: Coolant temperature greater than 60 °C, idling speed switch open, throttle valve angle less than 42.5°, vehicle speed 70... 105 km/h, EGR duty cycle greater than 50%, engine speed 1500... 3000 rpm, engine load 16... 60%
|
|
|
|
- Open circuit or short to positive between -G98 and engine control unit
- Earth supply for -G98 defective
- -G98 defective
|
|
- Reading measured value block, display group 017
|
|
|
|
- Faulty signal input in engine control unit (control unit defective)
|
|
- Renew engine control unit .
|
|
Output on V.A.G 1551 printer
|
Possible cause of fault
|
Possible effects
|
Fault rectification
|
|
17817
|
|
|
|
|
Fuel tank breather valve
-N80
|
|
|
|
|
|
Electrical fault in circuit
|
Stored if, after starting engine, control unit output of ACF solenoid 1 -N80 is "low" for more than 1 second under the following conditions: Engine speed less than 1100 rpm, engine load less than 32%, duty cycle of ACF solenoid 1 greater than 30%
|
|
|
|
- Power supply for
- -N80 defective
- Open circuit or short to earth between -N80 and engine control unit
- -N80 defective
|
- Poor progression in part throttle range
- Smell of petrol in vehicle
|
- Reading measured value block, display group 009
|
|
|
|
- Faulty signal input in engine control unit (control unit defective)
|
|
- Renew engine control unit .
|
|
|
|---|
|
Output on V.A.G 1551 printer
|
Possible cause of fault
|
Possible effects
|
Fault rectification
|
|
17818
|
|
|
|
|
Fuel tank breather valve
-N80
|
|
|
|
|
|
Short to positive
|
Stored if, after starting engine, control unit output of ACF solenoid 1 -N80 is "low" for more than 1 second under the following conditions: Engine speed less than 1250 rpm, engine load less than 40%, duty cycle of ACF solenoid 1 greater than 19%
|
|
|
|
- Short to positive between -N80 and engine control unit
- -N80 defective
|
- Poor progression in part throttle range
|
- Reading measured value block, display group 009
|
|
|
|
- Faulty signal input in engine control unit (control unit defective)
|
|
- Renew engine control unit .
|
|
Output on V.A.G 1551 printer
|
Possible cause of fault
|
Possible effects
|
Fault rectification
|
|
17908
|
|
|
|
|
Fuel pump relay
-J17
|
|
|
|
|
|
Electrical fault in circuit
|
Only stored if faults 17609/17610/17611/17612/17613/17614 have been stored at the same time
|
|
|
|
- Open circuit or short to earth between -J17 and engine control unit
- -J17 defective
|
- In the event of a short circuit to earth:
- Engine runs normally but battery is slowly discharged as -J17 is permanently energised
|
- Check -J17 => Page 24-43
|
|
|
|
- Signal output in engine control unit defective (control unit defective)
|
- In the event of an open circuit:
- Engine cuts out/will not start
|
- Renew engine control unit .
|
|
|
|---|
|
Output on V.A.G 1551 printer
|
Possible cause of fault
|
Possible effects
|
Fault rectification
|
|
17912
|
|
|
|
|
Air intake system
|
|
|
|
|
|
Leakage detected
|
If this fault is stored, both output stages ("+"and "-" output) are deactivated. The idling stabilisation valve -N71 is de-energised and opens emergency running cross section
|
|
|
|
- Large quantity of unmetered air
- Mechanical fault in the idling stabilisation valve -N71
|
- Engine speed deviates from specified speed when the engine is at operating temperature
- Possibly no idling if engine is cold
|
- Reading measured value block:
Display group 004
|
|
|
|
- 2nd stage of throttle valve unit sticking
|
- Air-conditioner compressor deactivated
- Possibility of jolting in part throttle range
- Flat spots or engine hunts
|
- Perform visual inspection
|
|
Output on V.A.G 1551 printer
|
Possible cause of fault
|
Possible effects
|
Fault rectification
|
|
17913
|
|
|
|
|
-F60 idling switch.
|
|
|
|
|
|
Does not close / open circuit
|
Stored if idling switch is not detected as being closed at least once after starting engine and after driving for 10 minutes at less than 100 km/h
|
|
|
|
- Throttle valve sticking
- -F60 defective
|
|
- Check idling switch
|
|
|
|
- Throttle cable setting
- Floor mat pressing down on accelerator
|
|
- Adjust throttle cable
|
|
|
|
- Open circuit or short to positive between -F60 and engine control unit
|
|
- Reading measured value block, display group 002
|
|
|
|
- Faulty signal input in engine control unit (control unit defective)
|
|
- Renew engine control unit .
|
|
|
|---|
|
Output on V.A.G 1551 printer
|
Possible cause of fault
|
Possible effects
|
Fault rectification
|
|
17914
|
|
|
|
|
-F60 idling switch.
|
|
|
|
|
|
Does not open/short to earth
|
▪ Stored if throttle valve open more than 7° and idling switch is closed for more than 1 second
▪ Fault 16504 is stored at the same time
|
|
|
|
- Short to earth between -F60 and engine control unit
- Moisture in connector of -F60
- -F60 defective
|
|
- Reading measured value block, display group 002
|
|
|
|
- Faulty signal input in engine control unit (control unit defective)
|
|
- Renew engine control unit .
|
|
Output on V.A.G 1551 printer
|
Possible cause of fault
|
Possible effects
|
Fault rectification
|
|
17917
|
|
|
|
|
Idling stabilisation valve -N71
|
|
|
|
|
|
Electrical fault in circuit
|
If this fault is stored, both output stages ("+" and "-"output) are deactivated. The idling stabilisation valve -N71 is de-energised and opens emergency running cross section
|
|
|
|
- Open circuit or short to earth between -N71 and engine control unit
- -N71 defective
|
- Engine speed deviates from specified speed when the engine is at operating temperature
- Possibly no idling if engine is cold
|
- Reading measured value block:
Display group 004
|
|
|
|
- Signal output in engine control unit defective (control unit defective)
|
- Air-conditioner compressor deactivated
|
- Renew engine control unit .
|
|
Output on V.A.G 1551 printer
|
Possible cause of fault
|
Possible effects
|
Fault rectification
|
|
17918
|
|
|
|
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Idling stabilisation valve -N71
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Short to positive
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If this fault is stored, both output stages ("+" and "-" output) are deactivated. The idling stabilisation valve -N71 is de-energised and opens emergency running cross section
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- Short to positive between -N71 and engine control unit
- -N71 defective
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- Engine speed deviates from specified speed when the engine is at operating temperature
- Possibly no idling if engine is cold
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- Reading measured value block:
display group 004
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- Signal output in engine control unit defective (control unit defective)
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- Air-conditioner compressor deactivated
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- Renew engine control unit .
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Output on V.A.G 1551 printer
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Possible cause of fault
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Possible effects
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Fault rectification
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17919
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Intake manifold changeover valve -N156
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Electrical fault in circuit
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- Open circuit or short to earth between -N156 and engine control unit
- Fault in power supply to -N156
- -N156 defective
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- In the event of an open circuit:
- -N156 does not open, loss of power above 4000 rpm
- In the event of a short circuit to earth:
- -N156 always open, loss of torque up to 4000 rpm
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- Check -N156
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- Signal output in engine control unit defective (control unit defective)
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- Renew engine control unit .
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Output on V.A.G 1551 printer
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Possible cause of fault
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Possible effects
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Fault rectification
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17920
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Intake manifold changeover valve -N156
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Short to positive
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- Short to positive in wiring between -N156 and engine control unit
- -N156 defective
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- -N156 does not open, loss of power above 4000 rpm
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- Check -N156
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- Signal output in engine control unit defective (control unit defective)
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- Renew engine control unit .
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Output on V.A.G 1551 printer
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Possible cause of fault
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Possible effects
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Fault rectification
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17978
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Engine control unit
blocked
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- Fault in immobilizer system
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- Engine starts but cuts out again immediately
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- Interrogate fault memory
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- Immobilizer control unit not adapted to engine control unit
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- Adapt control units
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- Open circuit between immobilizer control unit and engine control unit
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- Rectify open circuit .
=> "Current Flow Diagrams, Electrical Fault Finding and Fitting Locations" binder
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Output on V.A.G 1551 printer
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Possible cause of fault
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Possible effects
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Fault rectification
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18008
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Power supply, term. 15
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Voltage too low
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Stored if supply voltage is less than 10.0 V for more than 1 second (engine control unit does not function below 6.5 V)
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- Poor earth connection to engine control unit
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- Voltage less than 6 V
- Engine will not run
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- Reading measured value block, display group 001
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- Battery flat
- Current draw with "ignition off" (discharge)
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- Check voltage
Check charge
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Note:
If fault 18008 is shown as a sporadic fault, ignore the fault message on the display. This fault is often stored when the engine is left idling for a long period with a large number of electrical consumers switched on causing the battery to become greatly discharged.
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Output on V.A.G 1551 printer
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Possible cause of fault
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Possible effects
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Fault rectification
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18020
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Engine control unit incorrectly encoded
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Fault is stored if
▪ The following conditions apply 1 second after starting engine on vehicles with manual gearbox: Engine control unit encoded for automatic gearbox, vehicle speed less that 1 km/h, gear signal "high" during entire period; fault 01119 is stored at the same time
▪ The following conditions apply for more than 1 second, 1 second after the starting the engine on vehicles with automatic gearbox: Engine control unit encoded for manual gearbox, gear signal "low"
▪ The vehicle fitted with traction control system (ASR) is not encoded for ASR and engine control unit receives signal from ABS/ASR control unit
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- Engine control unit incorrectly encoded
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- Engine running problems
- Increased emissions
- Various faults in fault memory
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- Encode the control unit
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