Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the EBCM.
- Ignition ON, test for less than 1 volt between the 12 volt reference circuit terminal of the appropriate sensor listed below and ground.
- LF Sensor circuit terminal 9
- RF Sensor circuit terminal 5
- LR Sensor circuit terminal 3
- RR Sensor circuit terminal 11
- If greater than the specified value, test the 12 volt reference circuit for a short to voltage.
- Test for less than 1 volt between the signal circuit terminal of the appropriate sensor listed below and ground.
- LF Sensor circuit terminal 8
- RF Sensor circuit terminal 6
- LR Sensor circuit terminal 2
- RR Sensor circuit terminal 12
- If greater than the specified value, test the signal circuit for a short to voltage.
- Ignition OFF, test for infinite resistance between the 12 volt reference circuit terminal of the appropriate sensor listed below and ground.
- LF Sensor circuit terminal 9
- RF Sensor circuit terminal 5
- LR Sensor circuit terminal 3
- RR Sensor circuit terminal 11
- If less than the specified value, test the 12 volt reference circuit for a short to ground.
- Test for infinite resistance between the following signal circuit terminal of the appropriate sensor listed below and ground.
- LF Sensor circuit terminal 8
- RF Sensor circuit terminal 6
- LR Sensor circuit terminal 2
- RR Sensor circuit terminal 12
- If less than the specified value, test the signal circuit for a short to ground.
- Ignition OFF, disconnect the harness connector at the appropriate wheel speed sensor.
- Test for less than 2 ohms between the appropriate 12 volt reference circuit terminals listed below:
- LF sensor circuit terminal 9 at the EBCM harness connector and terminal 1 at the WSS harness connector
- RF sensor circuit terminal 5 at the EBCM harness connector and terminal 1 at the WSS harness connector
- LR sensor circuit terminal 3 at the EBCM harness connector and terminal 1 at the WSS harness connector
- RR sensor circuit terminal 11 at the EBCM harness connector and terminal 1 at the WSS harness connector
- If greater than the specified value, test the 12 volt reference circuit for an open or high resistance.
- Test for less than 2 ohms between the appropriate signal circuit terminals listed below:
- LF sensor circuit terminal 8 at the EBCM harness connector and terminal 2 at the WSS harness connector
- RF sensor circuit terminal 6 at the EBCM harness connector and terminal 2 at the WSS harness connector
- LR sensor circuit terminal 2 at the EBCM harness connector and terminal 2 at the WSS harness connector
- RR sensor circuit terminal 12 at the EBCM harness connector and terminal 2 at the WSS harness connector
- If greater than the specified value, test the signal circuit for an open or high resistance.
- If all circuits test normal, replace the appropriate wheel speed sensor. If the DTC resets replace the EBCM.