SIACM Run/Start Driver Over Volt

Test 1:

Tests 2 - 4:

Tests 5 - 8:

Tests 9 - 12:

Test 13:

SYMPTOM
SIACM RUN-START DRIVER OVER VOLT

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
- Stored code or intermittent condition
- Active code present