3A Ignition MUX Switch Input Short

3A-IGNITION MUX SWITCH INPUT SHORT





For a complete wiring diagram, refer to the Wiring Information Electrical Diagrams

- When Monitored:
With the ignition on.

- Set Condition:
When the BCM detects the ignition switch MUX circuit voltage is below 0.25 volts for at least 2 seconds.





1. IGNITION SWITCH




1. Turn the ignition off.
2. Disconnect the Ignition Switch harness connector.
3. Turn the ignition on.
4. With the scan tool in Sensors, read the IGNITION SW voltage.

Does the scan tool display IGNITION SW 0.0 volts?

Yes

- Go To 2

No

- Replace the Ignition Switch.
- Perform the BODY VERIFICATION TEST. Body Verification Test

2. (G20) IGNITION SWITCH SENSE CIRCUIT SHORT TO GROUND




1. Turn the ignition off.
2. Disconnect the Ignition Switch harness connector.
3. Disconnect the BCM C2 harness connector.
4. Measure the resistance between ground and the (G20) Ignition Switch Sense circuit.

Is the resistance below 10k ohms?

Yes

- Repair the (G20) Ignition Switch Sense circuit for a short to ground.
- Perform the BODY VERIFICATION TEST. Body Verification Test

No

- Replace and program the Body Control Module.
- Perform the BODY VERIFICATION TEST. Body Verification Test