FCM ORC Run/Start Driver Shorted to Ground (Active)

Tests 1 - 2:

Tests 3 - 6:

Test 7:

SYMPTOM
FCM, ORC RUN-START DRIVER SHORT TO GROUND - ACTIVE

TEST NOTE
This symptom is diagnosed using the test FCM, ORC RUN-START DRIVER OPEN - ACTIVE.

WHEN MONITORED
The FCM uses a microprocessor controlled transistor (high side driver) to supply power to the ORC. The microprocessor monitors the High Side Driver (HSD) circuit for short to ground when the ignition is in the Run or Start position.

SET CONDITION
The code will set within 1 second, if the microprocessor senses high HSD internal temperature. The high temperature is caused by short to ground.

POSSIBLE CAUSES
- Verifying ORC run-start driver codes
- Check battery voltage
- FCM, run-start driver over voltage
- ORC, run-start test
- FCM, run only open test
- IPM, run only open test
- ORC run only driver circuit open
- FCM, run-start short test
- IPM, run-start short test
- ORC run-start driver circuit short