Crankshaft Position Sensor: Testing and Inspection

CHECKING CRANKSHAFT POSITION SENSOR
- Check that sensor is tight (properly torqued).
- Disconnect black Crankshaft Position (CKP) sensor harness connector.

3-Pin Connector:

- Connect multimeter (Fluke 83 or equivalent) to harness connector terminals 1 and 2 (in connector holder) with adapter cable from VW 1594 connector test kit.
^ Specified value: approx. 1K ohms

If specified values are not obtained:
- Replace CKP sensor.

If specified value is obtained:
- Connect multimeter first between terminals 1 and 3 (GND) and then between terminals 2 and 3 (GND).
^ Specified value: infinite ohms in each case (no continuity).

If specified values are not obtained:
- Replace CKP sensor.

If specified value is obtained:
- Check wiring between sensor harness connector and Engine Control Module.

Wiring Checks:
- Connect VAG 1598 test box with VAG 1598/11 adapter harness to ECM wiring harness. Connecting VAG 1598/31 Test Box
^ Adapter harness is not connected to ECM.
- Check for continuity and/or short circuit using wiring diagram.

3-Pin Connector:

- Check shielding by checking for continuity between sensor connector terminal 3 and GND.
^ Specified value: maximum 1.0 ohm
- Check wiring for continuity between sensor connector terminal 1 and test box socket 5.
^ Specified value: maximum 1.0 ohm
- Check signal wire for continuity between sensor connector terminal 2 and test box socket 4.
^ Specified value: maximum 1.0 ohm

If specified values are not obtained:
- Repair short and/or break in wiring between sensor connector and ECM connector -C- and/or Ground (GND).

ECM Harness Connectors:

3-Pin Connector:

CKP sensor ECM connector C
connector terminal
1 5
2 4
3 Ground

If no malfunction can be determined:
- Replace ECM.