Commander 4WD V8-4.7L (2008)
Parking Assist Warning Indicator: Description and Operation
Park Assist Disabled Indicator
Description
DESCRIPTION
A park assist disabled indicator is standard equipment on all instrument clusters. However, on vehicles not equipped with an optional front or rear park
assist system this indicator is electronically disabled. The park assist disabled indication appears within the reconfigurable dot matrix Organic Light
Emitting Diode (OLED) display unit. The park assist disabled indicator consists of a textual PARK ASSIST DISABLED message which appears in
place of the compass/trip computer information in the dot matrix display.
The dot matrix OLED is soldered onto the cluster electronic circuit board, and is visible through a window with a smoked clear lens located on the lower
edge of the tachometer gauge dial face of the cluster overlay. The dark lens over the OLED prevents it from being clearly visible when it is not
illuminated. The PARK ASSIST DISABLED textual message appears in the same white color and at the same lighting level as the compass/trip
computer information when it is illuminated by the instrument cluster electronic circuit board.
The park assist disabled indicator is serviced as a unit with the OLED in the instrument cluster.
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 ElectroMechanical Instrument Cluster
(EMIC) (also known as the Cab Compartment Node/CCN) to confirm the system status. The EMIC 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 EMIC, 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.
