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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