Passat Wagon L4-1781cc 1.8L Turbo (AEB) (1998)
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Switch OFF ignition.
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Check Voltage supply of Throttle Body Control Module and wiring to Control Module.
If Voltage supply and wiring OK
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Replace Engine Control Module.
Continuation when display constantly shows idling
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Disconnect 8-pin harness connector from Throttle Body Control Module.
If Display shows Partially Open Throttle:
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Press -> button.
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Press 0 and 6 buttons to select Function 06: "End data output"
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Press Q button to enter input
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Switch OFF ignition.
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Replace Throttle Body Control Module J338.
If Display shows idling:
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Press -> button.
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Press 0 and 6 buttons to select Function 06: "End data output"
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Press Q button to enter input
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Switch OFF ignition.
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Check Throttle Body Control Module Voltage supply and wiring to the Control Module.
If Voltage supply and wiring OK:
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Replace Engine Control Module.
Throttle Body Drive G186 and Throttle Body Drive angle sensor G187, checking
Test conditions
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Engine Coolant Temperature at least 85 degree angle.
Test sequence
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Connect VAG 1551/1552 Scan Tool, See: Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble
Codes/Scan Tool Connecting
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Start engine and let idle
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Press 0 and 1 buttons to select "Address word" 01 "Engine electronics"
Display will appear as shown
Rapid data transfer
HELP
Select function XX
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Press 0 and 8 buttons to select Function 08: "Read measuring value block"