Passat Sedan V6-2771cc 2.8L DOHC (AHA) (1998)
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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 25
Connector terminal 4 to ECM/test box socket 26
Specified value: max. 1.5 Ohms
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Check wiring for short circuits between terminals of 4-pin connector, and ECM/test box.
Connector terminal 4 to ECM/test box socket 25
Specified value: Infinity Ohms
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Check wiring for short circuits to wiring harness shielding.
Connector terminal 4 to ECM/test box socket 14
Connector terminal 3 to ECM/test box socket 14
Specified value: Infinity Ohms
If wiring is OK:
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Replace Motronic ECM -J220-. See: Powertrain Management/Computers and Control Systems/Engine Control Module/Service and Repair
HO2S wiring, bank 2, sensor 1, checking
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Connect VAG1598/22 test box to ECM harness connector.