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

Test 1:

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

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

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
- Checking for active front control module DTCS
- Stored code present