|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
00513
|
|
|
|
|
Engine speed sender -G28
|
|
|
|
|
|
implausible signal
|
- G28 defective
- Distance speed sender/sender wheel too large
- Metal swarf on G28 or mounting pedestal loose
|
- Fault lamp lights up
- Increased idling speed
- Poor starting
- Engine runs rough
- Reduced output
- No indication on rev-counter
|
- Check G28
|
|
|
no signal
|
- G28 defective
- Wiring open or short circuit
|
|
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
00519
|
|
|
|
|
Intake manifold pressure sender -G71
|
|
|
|
|
|
implausible signal
|
- Charge pressure control solenoid valve (N75) defective
- Control unit defective
- Hose connections interchanged, not connected
|
- Reduced output
- Increased emission figures
|
- Check N75
|
|
|
Short to positive
|
|
|
|
|
|
Short to earth
|
|
|
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
00522
|
|
|
|
|
Coolant temperature sender -G62
|
|
|
|
|
|
Short to earth
|
- G62 defective
- Wiring short to earth
|
- Black exhaust when starting
- Engine pre-heating not operating
- Glow period always approx. 20 sec.
|
- Check G62
|
|
|
Open circuit/ short to positive
|
- G62 defective
- Wiring open circuit or short to positive
|
|
|
|
Output on V.A.G 1551 printer
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
00527
|
|
|
|
|
Intake manifold temperature sender -G72
|
|
|
|
|
|
Short to earth
|
- G72 defective
- Wire has short to earth
|
- Engine pre-heating not operating
|
- Check G72
|
|
|
Open circuit/short to positive
|
- G72 defective
- Open circuit or short to positive
|
|
|
|
00528
|
|
|
|
|
Altitude sender -F96
|
|
|
|
|
|
Open circuit/short to earth
|
- F96 defective
- Wiring open circuit or short to earth
|
- Black exhaust at altitude
|
- Check F96
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
00532
|
|
|
|
|
Current supply
|
|
|
|
|
|
implausible signal
|
- Current supply relay terminal 30 (J317) defective
|
- Various running problems including engine will not start
|
- Check current supply for Diesel direct injection system control unit
|
|
00539
|
|
|
|
|
Fuel temperature sender -G81
|
|
|
|
|
|
Short to earth
|
- G81 defective
- Wiring short to earth
|
- Increased emission figures
|
- Check G81
=> Page 23-56
|
|
|
Open circuit/short to positive
|
- G81 defective
- Wiring open circuit or short to positive
|
|
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
00542
|
|
|
|
|
Needle lift sender -G80
|
|
|
|
|
|
Input open
|
- G80 defective
- Wiring open or short circuit
|
- Fault lamp lights up
- Engine runs rough
- Reduced output
- Increased emission figures
|
- Check G80
=> Page 23-63
|
|
|
Open circuit/short to positive
|
- G81 defective
- Wiring open circuit or short to positive
|
|
|
|
|
Short to earth
|
|
|
|
|
|
implausible signal
|
- G80 defective
- Injection system wiring to 3rd cylinder not OK.
- Fuel shortage
- Air in fuel system
|
|
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
00550
|
|
|
|
|
Commencement of injection control
|
|
|
|
|
|
Control difference
|
- Commencement of injection valve (N108) defective
- Needle lift sender (G80) defective
- Fuel tank empty
- Fuel supply not OK., fuel shortage
- Air in fuel system
- Start of delivery not OK
|
- Engine runs rough
- Reduced output
- Poor cold start characteristics
- Increased emission figures
|
- Check N108
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
00553
|
|
|
|
|
Air mass meter -G70
|
|
|
|
|
|
implausible signal
|
- G70 defective
|
- Reduced output
- Black exhaust
|
- Check exhaust gas recirculation and air mass meter function
|
|
|
Open circuit/short to earth
|
- G70 defective
- Wiring open circuit or short to earth
|
|
|
|
|
Short to positive
|
- G70 defective
- Wiring open circuit or short to positive
|
|
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
00575
|
|
|
|
|
Intake manifold pressure
|
|
|
|
|
|
Control difference
|
- Solenoid valve for charge pressure control (N75) defective
- Hose connections interchanged, not connected
|
- Reduced output
|
- Check N75
|
|
00625
|
|
|
|
|
Speed signal
|
|
|
|
|
|
implausible signal
|
- With electrical speedometer: no signal from speedometer (G21) / speedometer sender (G22)
- With mechanical speedometer: no signal from speed sender (G54)
|
- Indicated speed incorrect
|
- Check signal from G21, G22 or G54
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
00626
|
|
|
|
|
Glow period warning lamp -K29
|
|
|
|
|
|
Open circuit/short to earth
|
- Wiring open circuit
- Bulb defective
|
- Glow period warning lamp not functioning
|
- Check glow period warning lamp -K29
=> Current flow diagrams, Electrical fault finding and Fitting locations binder
|
|
|
|
- Short to earth
|
- Glow period warning lamp permanently on
|
|
|
|
Short to positive
|
- Short to positive
|
- Glow period warning lamp not functioning
|
|
|
Ouput on V.A.G 1551 printer
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
00668
|
|
|
|
|
Vehicle current terminal 30
|
|
|
|
|
|
Signal too small
|
- Current supply relay terminal 30 (J317) defective
|
- Engine will not start
- Various running problems including engine will not start
|
- Check Diesel direct injection system control unit current supply
|
|
|
implausible signal
|
|
|
|
|
00671
|
|
|
|
|
CCS Switch -E45
|
|
|
|
|
|
undefined switch position
|
- E45 defective
- Wiring open/short circuit
|
- Cruise control system switched off
|
- Check cruise control system
=> Current flow diagrams, Electrical fault finding and Fitting locations binder
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
00741
|
|
|
|
|
Brake pedal monitoring
|
|
|
|
|
|
implausible signal
|
- Brake light switch (F) defective
- Brake pedal switch (F47) defective
- Both switch positions not synchronised
|
- Fault lamp lights up
- Brake light defective
|
- Check F and F47
|
|
00765
|
|
|
|
|
Modulating piston movement sender -G149
|
|
|
|
|
|
|
- Injection pump defective
- Wiring open/short circuit
|
- Fault lamp lights up
- Various running problems
- Engine stops
|
- Check G149
=> Page 23-59
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
00777
|
|
|
|
|
Accelerator position sender -G79
|
|
|
|
|
|
implausible signal
|
- G79 defective
- G79 incorrectly set
|
- Fault lamp lights up
- Increased idling speed
|
- Check G79
=> Page 23-18
|
|
|
Short to positive
|
- G79 defective
- Wiring short to positive
|
|
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
01028
|
|
|
|
|
Fan relay -J323
|
|
|
|
|
|
Open circuit/short to earth
|
- Wiring open circuit
- Relay defective
|
- Fan run-on not functioning
|
- Check J323
, final control diagnosis
|
|
|
|
- Short to earth
|
- Fan runs permanently
|
|
|
|
Short to positive
|
- Short to positive
|
- Fan run-on not functioning
|
|
|
01044
|
|
|
|
|
Control unit incorrectly coded
|
|
|
|
|
|
|
- Invalid control unit coding
|
|
- Code control unit
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
01117
|
|
|
|
|
Load signal for alternator terminal DF
|
|
|
|
|
|
implausible signal
|
- Alternator defective
- Voltage regulator defective
|
- Engine pre-heating not operating
|
- Check alternator
=> Current flow diagram, Electrical fault finding and Fitting locations binder
|
|
01180
|
|
|
|
|
Engine/air conditioner cut-off electrical connection
|
|
|
|
|
|
Short to positive
|
- Short in the wiring
|
- Vehicle acceleration reduced, when air conditioner is switched on
|
- Check air conditioner compressor cut-in
, final control diagnosis
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
01193
|
|
|
|
|
Low heat output relay -J359
|
|
|
|
|
|
Open circuit/short to earth
|
- Wiring open circuit
- Low heat output relay -J359 or high output relay -J360 defective
|
- Engine preheating not functioning
|
- Check J359 or J360
, final control diagnosis
|
|
|
|
- Short to earth
|
- Engine preheating permanently on
|
|
|
|
Short to positive
|
- Short to positive
|
- Engine preheating not functioning
|
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
01237
|
|
|
|
|
Fuel cut-off valve -N109
|
|
|
|
|
|
mechanical fault
|
- N109 defective, leaking or sticking
|
- Reduced output
- Engine stops
|
- Check N109
, Final control diagnosis
|
|
|
Open/short circuit to earth
|
- N109 defective
- Wiring open circuit/short to earth
|
|
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
01242
|
|
|
|
|
Control unit output stages
|
|
|
|
|
|
Open/short to positive
|
- All components activated by final control diagnosis
|
- Various running problems
- Engine stops
|
- Carry out final control diagnosis
Check wiring connections to control elements
Control unit defective if control elements OK.
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
01262
|
|
|
|
|
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
|
|
|
|
Short to positive
|
- Short to positive
|
- Reduced output
- Charge pressure too low
|
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
01265
|
|
|
|
|
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
|
|
|
|
Short to positive
|
- Short to positive
|
- No exhaust gas recirculation
|
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
01266
|
|
|
|
|
Glow plug relay -J52
|
|
|
|
|
|
Open circuit/short to earth
|
- Wiring open circuit
- Glow plug relay defective
|
- Glow plug system not working
|
- Check J52
, final control diagnosis
|
|
|
|
- Short to earth
|
- Glow plug system permanently on
|
|
|
|
Short to positive
|
- Short to positive
|
- Glow plug system not working
|
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
01268
|
|
|
|
|
Quantity adjuster -N146
|
|
|
|
|
|
Control difference
|
- Injection pump defective
- Wiring open/short circuit
|
- Fault lamp lights up
- Various running problems
- Engine stops
|
- Check N146
|
|
|
Lower limit value
|
- Quantity adjuster incorrectly set
|
- Black smoke
- Rough idling
|
|
|
|
Upper limit value
|
- Quantity adjuster incorrectly set
|
- Jerking, poor performance
|
|
|
V.A.G 1551 print-out
|
Possible causes of fault
|
Possible effects
|
Fault remedy
|
|
01269
|
|
|
|
|
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"
|
|
|
|
Short to positive
|
- Short to positive
|
- Engine knocks at idling, because commencement of injection is constantly "advanced"
|
|
