Diagnostic Routine Z

Diagnostic Routine Z

Diagnostic Overview

The Grade Assist Message Center Indicator Is Never or Always On

Normal Operation and Fault Conditions

NOTE: If DTC (Diagnostic Trouble Code) U0100:00 sets in the IPC (Instrument Panel Cluster), other observable symptoms can be an inoperative speedometer, tachometer or odometer.

REFER to Grade Assist Message Center Indicator .

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 (Instrument Panel Cluster) sets DTC (Diagnostic Trouble Code) U0100:00 in continuous memory and defaults the grade assist message center indicator off.

Pinpoint Test

1. CHECK THE MESSAGE CENTER WARNING INDICATOR FUNCTION

1. Close all doors, hood and liftgate.

2. Ignition ON.

3. NOTE: If multiple warnings are present, the message center cycles through each of the warning indicators. Allow the message center to cycle through each display while determining whether the door ajar message center warning indicator is active.
Open the driver door while monitoring the door ajar message center warning indicator.

Does the driver door ajar message center warning indicator turn off with the driver door closed and illuminate with the driver door open?








2. CHECK THE OPERATION OF THE GRADE ASSIST FUNCTION

1. Verify the grade assist function operates when engaged and turns off when disengaged.

Does the grade assist function operate correctly?








3. RETRIEVE THE RECORDED DTCs (Diagnostic Trouble Codes) FROM THE IPC (Instrument Panel Cluster) SELF-TEST

1. Using a scan tool, perform the IPC (Instrument Panel Cluster) self-test.

Is DTC (Diagnostic Trouble Code) U0100:00 recorded?








4. RETRIEVE THE RECORDED DTCs (Diagnostic Trouble Codes) FROM THE PCM (Powertrain Control Module) KOEO (Key ON Engine OFF) SELF-TEST

1. Using a scan tool, perform the PCM (Powertrain Control Module) KOEO (Key ON Engine OFF) self-test.

Are any DTCs (Diagnostic Trouble Codes) recorded?