Jetta GLS L4-1.8L Turbo (AWD) (2001)
If the specification is not obtained:
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Replace knock sensor(s)
If the specification is obtained:
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Connect test box VAG 1598/31 to control module wiring harness. The engine control module remains disconnected.
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Check wiring between test box and 3- pin connector for open circuit using wiring diagram.
G61: G66:
Contact 1 + socket
106
107
Contact 2 + socket
99
99
Contact 3 + socket
108
108
Wire resistance: Max. 1.5 ohms
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Additionally check wires for short to one another.
If no wiring fault is detected:
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Loosen knock sensor and tighten again to 20 Nm.
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Carry out test drive.
During the road test the following operating conditions must be fulfilled:
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The coolant temperature must exceed 80 °C.
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When the temperature is reached, the operating conditions
Idling
Part throttle
Full throttle
Overrun
must be attained several times.
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At full throttle the speed must exceed 3500 RPM.
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Again interrogate the control module fault memory.
If the fault is still present:
-
Replace knock sensor(s)