Liftgate Door MUX Circuit Shorted to Ground
Tests 1 - 2:
SYMPTOM
LIFTGATE DOOR MUX circuit shorted to ground
WHEN MONITORED:
Anytime battery voltage is above 10 volts and BCM is awake. Each switch inside the door has a unique resistance value which when activated sends a voltage level to the BCM. The BCM will interpret the different levels and perform the desired function.
SET CONDITION:
The BCM senses a voltage below 4 volts on the liftgate switch MUX circuit.
POSSIBLE CAUSES
- Liftgate switch MUX circuit shorted to ground
- Liftgate switch circuit intermittent shorted to ground
- Liftgate door switch mux circuit at BCM defective