Ignition MUX Switch Input Open

Test 1 - 3:

Test 4 - 5:

SYMPTOM
IGNITION MUX SWITCH INPUT OPEN

WHEN MONITORED
With the ignition on and battery voltage greater than 10.4 volts.

SET CONDITION
The ignition MUX sense circuit voltage at the BCM goes above 4.9 volts.

POSSIBLE CAUSES
- Ignition switch sense circuit shorted to voltage
- Ignition switch failure
- Ignition switch sense return circuit open
- Body control module
- Ignition switch sense circuit open
- Body control module