S4 Quattro Sedan V6-2.7L Turbo (APB) (2000)
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Connect VAG1598/31 test box to multi-pin harness connector for engine control module. Do not connect to the engine control module itself. Refer
to "Scan Tool Testing/Wiring And Component Check With VAG1598/31 Test Box", See: Computers and Control Systems/Testing and
Inspection
If the diode test lamp lights up continuously:
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Check for short circuit to Ground (GND) in wiring between contact 2 on EVAP valve harness connector and socket 64 on test box.
If the diode test lamp does not flash:
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Check for open circuit as well as short circuit to B+ in wiring between contact 2 on EVAP valve harness connector and socket 64 on test box.
Resistance in wiring: max. 1.5 Ohms
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If necessary, repair short circuit to Ground (GND) or open circuit.
If no short circuit or open circuit is found
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Replace Motronic Engine Control Module (ECM) -J220.