Pinpoint Test I: The Transmission Gear Display Indication Is Inoperative

Normal Operation and Fault Conditions
See Transmission Gear Display. REFER to: Head Up Display (HUD) - System Operation and Component Description .

Possible Sources
- Communication concern
- PCM concern
- GWM concern
- HUD module

I1 PERFORM THE PCM (POWERTRAIN CONTROL MODULE) KOEO (KEY ON, ENGINE OFF) SELF-TEST
- Ignition ON.
- Using a diagnostic scan tool, perform the PCMKOEO self-test.
Are any Diagnostic Trouble Codes (DTCs) recorded?

Yes REFER to: Electronic Engine Controls .

No GO to I2

I2 PERFORM THE HUD (HEAD UP DISPLAY) MODULE SELF-TEST
- Using a diagnostic scan tool, perform the HUD module self-test.
- Check for recorded Diagnostic Trouble Codes (DTCs) from the HUD module self-test.
Are any Diagnostic Trouble Codes (DTCs) recorded?

Yes REFER to DTC Chart: HUD Module in This Service Information.

No GO to I3

I3 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)
- Using a diagnostic scan tool, check the GWM Continuous Memory Diagnostic Trouble Codes (CMDTCs).
Are any Diagnostic Trouble Codes (DTCs) recorded?

Yes REFER to: Communications Network .

No INSTALL a new HUD module. REFER to: Head Up Display (HUD) Module .