Engine Speed Sensor: Testing and Inspection

ENGINE SPEED SENSOR, CHECKING

Special tools, testers and auxiliary items
- VAG 1598/18 test box
- 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: Infinity Ohms

If no wiring malfunction is detected:
- Replace engine speed (RPM) sensor -G28-.
- Read the readiness code. If DTC memory has been erased, repair must be verified via appropriate display group See Readiness code creating. Refer to "On-Board Diagnostics II With VAG 1551". Testing and Inspection