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

Tests 1 - 2:

Tests 3 - 5:

Tests 6 - 9:

Tests 10 - 11:

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

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

WHEN MONITORED
The FCM uses a microprocessor controlled transistor (high side driver) to supply power to the SIACM. The microprocessor monitors High Side Driver (HSD) internal temperature 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 over current.

POSSIBLE CAUSES
- Check battery voltage
- FCM, SIACM run-start DR over voltage
- FCM, SIACM run-start open test
- FCM, SIACM run-start open test
- FCM, SIACM run-start short test
- IPM, SIACM run-start open test
- RSIACM, run-start open test
- Run-start open test
- SIACM run-start driver circuit open
- IPM, SIACM run-start short test
- LSIACM, SIACM run-start short test
- Right SIACM run-start driver circuit open
- SIACM run-start driver circuit short
- Right SIACM, SIACM run-start short test