Commander 2WD V8-4.7L (2008)
Parking Assist Warning Indicator: Description and Operation
Service Park Assist Indicator
Description
DESCRIPTION
A service park assist indicator is standard equipment on all instrument clusters. However, on vehicles not equipped with the optional front or rear park
assist systems, this indicator is electronically disabled. The service park assist indication appears within the reconfigurable dot matrix Organic Light
Emitting Diode (OLED) display unit. The service park assist indicator consists of a textual SERVICE PARK ASSIST SYSTEM 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 service park assist indicator 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 service park assist indicator is serviced as a unit with the OLED in the instrument cluster.
Operation
OPERATION
The service park assist indicator gives an indication to the vehicle operator when the park assist module has recorded a Diagnostic Trouble Code (DTC)
for a front or rear park assist system circuit or component malfunction. This indicator is controlled by the instrument cluster logic circuit based upon
cluster programming and electronic messages received by the cluster from the park assist module over the Controller Area Network (CAN) data bus.
The service park assist 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 service park assist indication will always be OFF when the ignition switch is
in any position except ON or START. The instrument cluster will turn ON the service park assist indicator for the following reasons:
-
Service Park Assist Indicator Lamp-On Message - Each time the cluster receives an electronic service park assist indicator lamp-ON
message from the park assist module, the service park assist indicator will be illuminated. The indicator remains illuminated for between three and
five seconds, 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 park assist module continually monitors the front and rear park assist system circuits and components to determine the condition of the system. The
park assist module 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 front or rear park assist systems, the park assist module, the EMIC, the CAN data bus or the electronic communication
related to service park assist indicator operation a diagnostic scan tool is required. Refer to the appropriate diagnostic information.
