PINPOINT TEST Z : The Grade Assist Message Center Indicator Is Never or Always On: Notes

Diagnostic Overview

Refer to Message Center , Grade Assist 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

If the transmission shift mode message is missing for less than 5 seconds, the grade assist message center indicator remains in the last indication mode (on or off) based upon the last known good message.

If the transmission shift mode message is missing for 5 seconds or longer, the IPC sets DTC U0100:00 in continuous memory and defaults the grade assist message center indicator off.