Self diagnosis
Fault table Digifant 3.2
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).
V.A.G 1551 print-out
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Possible fault cause
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Fault elimination
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No fault recognised!
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If a complaint has been received:
Fault not recognised by self-diagnosis
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Carry on fault finding according to fault table in "Fault finding engine" binder.
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00518
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Throttle valve potentiometer -G69
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Open circuit/short circuit to earth
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Wires or G69 has short to earth
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Check G69
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Short to positive
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Wiring open circuit
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G69 defective
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V.A.G 1551 print-out
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Possible fault cause
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Fault elimination
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00519
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Intake manifold pressure sender
G71
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G71 in Digifant control unit J169 defective
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- Replace J169
, item 11
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Implausible signal
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Vacuum pipes to Digifant control unit defective, not connected
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- Check vacuum pipes
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Oil is drawn from the crank case breather to the control unit by pulsations in the vacuum pipe.
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- Check vacuum pipe for oiling, replace if necessary.
If oil is visible in the control unit connection or the fault re-occurs:
Renew control unit
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If the fault cannot be erased:
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Adjustment of toothed belts not OK.
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- Check adjustment of toothed belts
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Camshaft(s) incorrectly installed (offset by 1 tooth)
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- Check position of camshafts
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If adjustment of toothed belts and position of camshafts OK.:
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Camshaft(s) sprocket shrunk-on offset
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- Check valve timing, if necessary renew camshaft(s)
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V.A.G 1551 print-out
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Possible fault cause
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Fault elimination
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00522
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Coolant temperature sender
-G62
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G62 defective
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- Check G62
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Open circuit/short to positive
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Wiring open circuit
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Implausible signal
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For a brief period: Wiring open circuit, short circuit or open circuit in G62
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- Check wiring and connections for loose contact using current flow diagram
Check G62
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00523
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Intake air temperature sender
G42
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G42 defective
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- Check G42
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Short to earth
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Wiring has short to earth
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Open circuit/short to positive
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G42 defective
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Wiring open circuit
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V.A.G 1551 print-out
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Possible fault cause
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Fault elimination
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00524
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Knock sensor 1 G61
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Wiring open circuit/short circuit in sensor wiring
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- Check G61
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No signal
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G61 defective (knock sensor on right in direction of travel)
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- Renew G61
, item 21
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No knock recognition from control unit (J169)
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- Renew J169
, item 11
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00525
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Lambda probe G39
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G39 defective
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- Check Lambda probe and Lambda control
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No signal
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Wiring open circuit
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Short to positive
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G39 defective
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Wiring has short to positive
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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 fault cause
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Fault elimination
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00532
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Supply voltage
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Battery voltage above 15.5 V
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- Check alternator
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Signal too high
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Signal too low
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Battery voltage less than 6.1 V
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- Check battery
Check control unit voltage supply
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00540
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2144
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Knock sensor 2 G66
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Wiring open circuit/short circuit in the sensor wiring
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- Check G66
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No signal
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G66 defective (knock sensor on left in direction of travel)
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- Renew G66
, item 19
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No knock recognition from control unit (J169)
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- Renew J169
, item 11
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V.A.G 1551 print-out
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Possible fault cause
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Fault elimination
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00740
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Cylinder No. 1 recognition sender-G145
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G145 defective
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- Check G145
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No signal
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Wiring open circuit
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01087
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Basic setting not performed
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The engine control unit has not been adapted to the engine
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- Perform basic setting
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01249
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Injector Cyl. No. 1 -N301)
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- Wiring open/short circuit in wiring to injector cylinders 1, 2, 3 or 4
- Injector cylinders 1, 2, 3 or 4 (N30...N33) defective
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- Check N30...N33
=> Page , checking injectors
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1)
"Injector Cyl. No. 1 -N30" is permanently displayed, this is also the case if the fault has occurred on other cylinders.
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V.A.G 1551 print-out
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Possible fault cause
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Fault elimination
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17978
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Engine control unit blocked
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The electronic immobilizer control unit (J362) has blocked the Digifant control unit
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- Adapt the engine electronics control unit to the electronic immobilizer
Check electronic immobilizer:
=> Repair group 96; Servicing electronic immobilizer
Afterwards you must start the engine and erase the Digifant control unit fault memory.
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V.A.G 1551 print-out
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Possible fault cause
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Fault elimination
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65535
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Control unit defective
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Components in Digifant control unit (J169)
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- Renew J169
, item 11
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