Park Assist Disabled Indicator - Operation

OPERATION

The park assist disabled indicator gives an indication to the vehicle operator when the front and rear park assist systems have been manually disabled using the park assist switch found in the instrument panel lower switch pod. 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 park assist module.

The park assist disabled 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 only allow this indicator to operate when the instrument cluster receives a battery current input on the fused ignition switch output (run-start) circuit. Therefore, the OLED park assist disabled indication will always be OFF when the ignition switch is in any position except ON or START. The instrument cluster will turn ON the park assist disabled indicator for the following reasons:

- Park Assist Disabled Indicator Lamp-On Message - Each time the cluster receives an electronic park assist disabled indicator lamp-ON message from the park assist module indicating that the park assist system has been manually disabled, the park assist disabled textual warning is illuminated. The park assist disabled textual warning remains illuminated until the cluster receives a lamp-OFF message from the park assist module, until the cluster arbitrator logic determines that another display request has priority, or until the ignition switch is turned to the OFF position, whichever occurs first.

The instrument cluster continually monitors the park assist switch in the instrument panel lower switch pod to determine the selected status of the park assist system. The cluster then sends the proper switch status message to the park assist module. After a switch status message is sent by the cluster, the park assist module enables or disables the system as appropriate then sends an electronic message back to the instrument cluster, also known as the Cab Compartment Node (CCN) to confirm the system status. The CCN then energizes or de-energizes the park assist disabled textual warning and the Light Emitting Diode (LED) indicator in the park assist switch as appropriate.

For proper diagnosis of the park assist switch, the park assist module, the CCN, the CAN data bus or the electronic communication related to park assist disabled indicator operation a diagnostic scan tool is required. Refer to the appropriate diagnostic information.