Passat Syncro Wagon V6-2771cc 2.8L DOHC (AHA) (1998)
-
Disconnect 4-pin connector (black) for HO2S -G108- (arrow).
-
Check wiring for open circuit between ECM/test box and 4-pin HO2S harness connector (to ECM).
Connector terminal 3 to ECM/test box socket 39
Connector terminal 4 to ECM/test box socket 40
Specified value: max. 1.5 Ohms
-
Check wiring for short circuits between terminals of 4-pin connector, and ECM/test box.
Connector terminal 4 to ECM/test box socket 39
Specified value: Infinity Ohms
-
Check wiring for short circuits to wiring harness shielding.
Connector terminal 3 to ECM/test box socket 14
Connector terminal 4 to ECM/test box socket 14
Specified value: Infinity Ohms
If wiring is OK:
-
Replace Motronic ECM -J220-. See: Engine Control Module/Service and Repair