GTI V6-2.8L (BDF) (2002)
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Connect multimeter to measure voltage at terminals 3 and 4 (connector to Motronic Engine Control Module (ECM) -J220-) using adapter cables
from VAG 1594.
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Start engine and run at idle speed.
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Measure voltage supply and observe display group 41, display zone 2.
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Display Htg.bC.ON: Specification: 11.0 to 14.5 V
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Display Htg.bC.ON / Htg.bC.OFF (alternating): Specification: Between 0.0 to 12.0 V fluctuating
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Switch off ignition.
If no voltage is present:
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Remove wiper arms and cowl panel:
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Connect VAG 1598/31 test box to control module wiring harness. The Motronic Engine Control Module (ECM) -J220- remains disconnected.
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Check wiring for open circuit between test box and 6-pin connector according to Electrical Wiring Diagrams. Terminal 4 and socket 5
Wire resistance: max. 1.5 ohms
If the specification is obtained:
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Check wire for open circuit between 6-pin connector terminal 3 and Fuel Pump (FP) -J17- referring to Electrical Wiring Diagrams.
Wire resistance: max. 1.5 ohms
If no wiring malfunction is detected:
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Replace Motronic Engine Control Module (ECM) -J220-.
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Check DTC memory, repair malfunctions if necessary and then erase DTC memory.
See: Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Reading Diagnostic Trouble Codes
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Erase learned values and adapt Motronic Engine Control Module (ECM) -J220- again.
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Read readiness code. If the DTC memory has been erased or the Motronic Engine Control Module (ECM) -J220- was disconnected from battery