Engine Speed Sensor: Testing and Inspection

Special Tools, Testers And Auxiliary Items
- VAG 1598/18testbox
- Multimeter (Fluke 83 Or Equivalent)
- Connector Test Kit VW 1594
- Wiring Diagram

Test Sequence




- Disconnect 3-pin connector to engine speed sensor -1-.




- Connect VAG 1598/18 test box to ECM wiring harness.




- Check wiring between test box and 3-pin connector for open circuit using wiring diagram.
- Terminal 1 and test box socket 67
- Terminal 2 and test box socket 68
- Terminal 3 and test box socket 56
Resistance:Maximum 1.5 ohms

- Additionally, check wiring for short circuit to one another.
- Terminal 2 and test box socket 56
- Terminal 1 and test box socket 56
- Terminal 1 and test box socket 68
Specification: Infinite Ohms

If no wiring malfunction is detected:
- Replace engine speed sensor -G28-.
- Read the readiness code. If DTC memory has been erased, repair must be verified via appropriate display group: Readiness code, creating.