PINPOINT TEST X : The Cruise Control Message Center Indicator Is Never or Always On: Notes

Diagnostic Overview

Refer to Message Center , Cruise Control Message Center Indicator.

NOTE: If DTC U0100:00 sets in the IPC, other observable symptoms can be an inoperative speedometer, tachometer or odometer.

Normal Operation and Fault Conditions

On standard cruise control vehicles, if the cruise control status message is missing for less than 5 seconds, the IPC defaults the cruise control message center indicator to the last indication state (on or off) based upon the last know good message received. If the cruise control status message is missing or if the data is deemed invalid by the IPC for 5 seconds or longer, the IPC sets DTC U0100:00 in continuous memory and defaults the cruise control indicator off.

On adaptive cruise control vehicles, if the adaptive cruise control follow mode display message is missing for less than 300 milliseconds, the IPC defaults the cruise control message center indicator to the last indication state (on or off) based upon the last know good message received. If the adaptive cruise control follow mode display message is missing or if the data is deemed invalid by the IPC for 300 milliseconds or longer, the IPC sets DTC U0104:00 in continuous memory and defaults the cruise control indicator off.