SIACM Run/Start Driver Shorted to Ground

Test 1 - 2:

Test 3 - 4:

Test 5 - 8:

Test 9 - 10:

Test 11 - 13:

Test 14 - 18:

Test 19 - 20:

SYMPTOM
SIACM RUN - START DRIVER SHORT TO GROUND

TEST NOTE
This symptom is diagnosed using the test RUN - START CIRCUIT TEST.

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
- ORC, loss of ignition run - start
- ACM, ORC run - start open
- FCM, ORC run - start open
- IPM, ORC run - start driver open
- ORC run - start driver circuit open
- FCM, ORC run - start short
- Left side impact airbag control module
- Right side impact airbag control module
- IPM, ORC run - start short
- ORC run - start circuit short
- ACM, ORC run - start driver circuit short
- FCM, SIACM run - start open
- RIGHT SIACM and SIACM run - start circuit open
- FCM, SIACM run - start open
- FCM, SIACM run - start circuit short
- IPM, SIACM run - start circuit open
- RSIACM, run - start circuit open
- SIACM run - start circuit open
- IPM, SIACM run - start circuit short
- LSIACM, SIACM run - start circuit short
- Left SIACM and SIACM run - start circuit open
- High battery voltage
- FCM, run - start over voltage
- Right SIACM, SIACM run - start circuit short
- SIACM run - start circuit short
- Stored code or intermittent condition
- Active code present