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ORC Run Only Driver Shorted to Ground

Test 1 - Test 4:




Test 5 - Test 8:




Test 9 - Test 11:




Test 12:






SYMPTOM
ORC RUN ONLY DRIVER SHORT TO GROUND

TEST NOTE
This symptom is diagnosed using the test LOSS OF IGNITION RUN ONLY.

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 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
- ACM, loss of ignition run only
- ACM, ORC run only circuit open
- FCM, ORC run only circuit open
- IPM, ORC run only circuit open
- ORC run only driver circuit open
- FCM, ORC run only circuit short
- IPM, ORC run only circuit short
- ACM, ORC run only circuit short
- ORC run only circuit short
- High battery voltage
- ORC run only over voltage
- Stored code or intermittent condition
- Active code present