Operation

OPERATION

The power liftgate indicator gives an indication to the vehicle operator of the system status or when the system has been automatically disabled. This indicator is controlled by the instrument cluster logic circuit based upon cluster programming and electronic messages received over the Controller Area Network (CAN) data bus from the Power LiftGate Module (PLGM).

The power liftgate indicator function of the reconfigurable dot matrix Organic Light Emitting Diode (OLED) display unit is completely controlled by the instrument cluster logic circuit, and that logic will allow this indicator to operate whenever the instrument cluster receives a battery current input on the fused B(+) circuit. Therefore, the OLED power liftgate indications can be illuminated regardless of the ignition switch position. The instrument cluster will turn ON the power liftgate indicator for the following reasons:

- Unlock To Operate Message - Each time the cluster receives an electronic unlock to operate message from the PLGM, the UNLOCK TO OPERATE textual message is displayed. The message is displayed for about three seconds or until the cluster arbitrator logic determines that another display request has priority, whichever occurs first.
- Put In Park To Operate Message - Each time the cluster receives an electronic put in PARK to operate message from the PLGM, the PUT IN PARK TO OPERATE textual message is displayed. The message is displayed for about three seconds or until the cluster arbitrator logic determines that another display request has priority, whichever occurs first.
- Function Disabled Message - Each time the cluster receives an electronic function disabled message from the PLGM, the FUNCTION DISABLED textual message is displayed. The message is displayed for about three seconds or until the cluster arbitrator logic determines that another display request has priority, whichever occurs first.
- Close Liftgate Glass Message - Each time the cluster receives an electronic close liftgate glass message from the PLGM, the CLOSE LIFTGLASS textual message is displayed. The message is displayed for about three seconds or until the cluster arbitrator logic determines that another display request has priority, whichever occurs first.
- Obstacle Detected Message - Each time the cluster receives an electronic obstacle detected message from the PLGM, the OBSTACLE DETECTED textual message is displayed. The message is displayed for about three seconds or until the cluster arbitrator logic determines that another display request has priority, whichever occurs first.
- Manually Close To Operate Message - Each time the cluster receives an electronic manually close to operate message from the PLGM, the MANUAL CLOSE TO OPERATE textual message is displayed. The message is displayed for about three seconds or until the cluster arbitrator logic determines that another display request has priority, whichever occurs first.

The PLGM continually monitors the power liftgate inputs to determine the proper outputs to the power liftgate components. The PLGM then sends the proper lamp-ON or lamp-OFF message to the ElectroMechanical Instrument Cluster (EMIC) (also known as the Cab Compartment Node/CCN).

For proper diagnosis of the power liftgate, the PLGM, the EMIC, the CAN data bus or the electronic communication related to power liftgate indicator operation a diagnostic scan tool is required. Refer to the appropriate diagnostic information.