Jetta GLS L4-1.8L Turbo (AWP) (2002)
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Connect VAG1598/31 test box to control module wiring harness. The engine control module remains disconnected.
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Check wiring between test box and 2-pin connector for open circuit according to wiring diagram.
G61: G66:
Terminal 1+Socket
106
107
Terminal 2+Socket
99
99
Wire resistance: max. 1.5 Ohm
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Additionally check wires for short to one another.
Specification: infinity Ohm
If no wiring fault is detected:
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Loosen knock sensor and tighten again to 20 Nm.
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Perform a test drive again and check knock control specifications on display.
Observe the valid safety precautions when carrying out a road test. See: Powertrain Management/Computers and Control Systems/Service
Precautions/Technician Safety Information
During the road test the following operating conditions must be fulfilled:
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The coolant temperature must exceed 85 °C
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When the temperature is reached, the operating conditions
Idling
Part throttle
Wide open throttle
Overrun
must be attained several times.
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At wide open throttle the engine speed must exceed 3500 rpm.
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Again check control module DTC memory.