FCM SIACM Run/Start Driver Over Volt (Active)

Tests 1 - 2:

Tests 3 - 5:

Tests 6 - 9:

Tests 10 - 11:

SYMPTOM
FCM, SIACM RUN-START DRIVER OVER VOLT - 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 circuit. The microprocessor monitors the battery voltage when the ignition is in the run or start position.

SET CONDITION
The code will set if the microprocessor senses the battery voltage is over 30 volts.

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