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Self diagnosis
Fault table Digifant 3.0
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).
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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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No fault recognised!
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If a fault is present:
Fault not recognised by self diagnosis
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Continue fault finding using fault table in "Engine fault finding" 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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00513
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Engine speed sender G28
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G28 breaks down at high engine speeds
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- Renew G28 =>Page 24-10
, item 21
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No signal
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Loose contact in sender wiring
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- Check wiring and connections for loose contact according to current flow diagram
Check G28 =>Page 24-58
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00515
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Hall sender G40
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G40 defective
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- Check G40 =>Page 28-10
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No fault type recognised/sporadic fault
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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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00518
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Throttle valve potentiometer -G69
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Short to earth
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Wiring or G69 has short to earth
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Check G69 =>Page 24-43
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Short to positive
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Wiring open circuit
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G69 defective
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No fault type recognized/sporadic faults
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Briefly: Wiring open circuit, short circuit or open circuit in G69
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- Check wiring and connections for loose contact using current flow diagram
Check G69 =>Page 24-43
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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 =>Page 24-8
, item 11
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No 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 =>Page 24-49
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Open circuit/short to positive
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Wiring open circuit
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No fault type recognized/sporadic fault
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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 =>Page 24-49
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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 =>Page 24-54
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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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No fault recognised/sporadic fault
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For a brief period: Wiring open circuit, short circuit or open circuit in G42
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- Check wiring and connections for loose contacts using current flow diagram
Check G42 =>Page 24-54
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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 =>Page 28-16
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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 =>Page 28-4
, item 21
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No knock recognition from control unit (J169)
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- Renew J169 =>Page 24-8
, 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 =>Page 24-29
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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 =>Page 24-69
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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 =>Page 28-16
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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 =>Page 28-4
, item 19
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No knock recognition from control unit (J169)
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- Renew J169 =>Page 24-8
, item 11
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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 =>Page 24-8
, item 11
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