ORC Run/Start Driver Shorted to Ground

Test 1:

Tests 2 - 3:

Tests 4 - 8:

Test 9:

SYMPTOM
ORC RUN - START DRIVER SHORT TO GROUND

TEST NOTE
This symptom is diagnosed using the test ORC RUN - START DRIVER OVER CURRENT.

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 - start open test
- IPM, run - start driver circuit open
- ORC run - start driver circuit open
- FCM, run - start short test
- IPM, run - start short test
- ORC run - start driver circuit short
- Stored code or intermittent condition
- Active code present