Ignition MUX Switch Input Open

Tests 1 - 3:

Test 4:

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
- Ignition switch sense circuit open
- Ignition switch sense return circuit open
- Body control module
- Body control module