Test sequence
WARNING: This page is about a different variant/trim than selected.
- Switch off ignition.
- Disconnect connector for engine speed sensor. Fitting location overview.
- Measure resistance between connector contacts 1+2.
Specification: 1.1 to 1.6 kΩ
If the specification is not obtained:
- Replace engine speed sensor G28. Fitting location overview.
- Check DTC memory and, if necessary, repair any malfunctions and then erase → Diagnostic Trouble Code (DTC) memory, checking and erasing .
- If the DTC memory has been erased, the readiness code must be generated again → Readiness code, setting .
If the specification is obtained:
- Remove wiper arms and plenum cover: → 92 WINDSHIELD WIPER & WASHER SYSTEM
- Connect test box VAG1598/31 to control unit wiring harness.
- Check wiring between test box and 3-pin connector for open circuit according to wiring diagram.
Terminal 1+ socket 102
Terminal 2+ socket 110
Terminal 3+ socket 86
Wire resistance: max. 1.5 Ω
- Check wiring at 3 pin connector for short circuit to one another according to wiring diagram. Specification: ∞ Ω
If no wiring malfunction is detected:
- Remove sensor and check sensor wheel for secure fit, damage and run-out.
If no malfunction is detected:
- Replace Diesel Direct Fuel Injection Engine Control Module J248 → Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) J248 , replacing .