Liftgate Ajar Indicator - Operation

OPERATION

The gate ajar indicator gives an indication to the vehicle operator that the rear liftgate may be open or not completely latched. This indicator is controlled by the instrument cluster logic circuit based upon cluster programming and a hardwired input received by the cluster from the liftgate ajar switch integral to the liftgate latch unit.

The gate ajar indicator function of the Vacuum Fluorescent Display (VFD) is completely controlled by the instrument cluster logic circuit. This logic only allows the indicator to operate when the instrument cluster receives a battery current input on the fused ignition switch output (run-start) circuit. Therefore, the VFD gate ajar indication is always off when the ignition switch is in any position except ON or START. The instrument cluster turns on the gate ajar indicator for the following reasons:

- Liftgate Ajar Switch Input - Each time the cluster detects ground on the liftgate ajar switch sense circuit (liftgate ajar switch closed = gate is open or not completely latched) the gate ajar indicator illuminates. The indicator remains illuminated until the liftgate ajar switch sense input to the cluster is an open circuit (liftgate ajar switch open = liftgate fully closed), until the cluster has completed an interior lamps load shed (about five minutes), or until the ignition switch turns to the off position, whichever occurs first.

The instrument cluster, also known as the Cab Compartment Node (CCN) continually monitors the liftgate ajar switch to determine the status of the liftgate. For further diagnosis of the liftgate ajar indicator or the instrument cluster circuitry that controls the indicator, Testing and Inspection.

Use conventional diagnostic tools and procedures for the hardwired liftgate ajar switch and circuits related to gate ajar indicator operation. Refer to the appropriate wiring information.