Pinpoint Test Ag : The Tow Haul RTT (RECONFIGURABLE Telltale) Indicator Is Never Or Always On

Normal Operation and Fault Conditions
See Tow Haul. REFER to: Instrument Panel Cluster (IPC) - System Operation and Component Description .

If the auto tow active status, auto tow allow status menu or auto tow allow request menu messages are missing for less than 5 seconds, the IPC defaults the tow haul RTT indicator to its last state (on or off) based on the last message received.

If the auto tow active status, auto tow allow status menu or auto tow allow request menu messages are missing for 5 seconds or longer, the IPC defaults the tow haul RTT indicator on

Possible Sources
- Communication concern
- Message center concern
- PCM concern
- GWM concern
- IPC

AG1 CHECK THE MESSAGE CENTER OPERATION
- Ignition ON.
- Close all doors, liftgate and hood.
- Clear all message center warnings by pressing the OK button for each warning present.
- Monitor the door ajar RTT warning indicator.
- Open the driver door.
- Clear the message center popup warning.
- Monitor the door ajar RTT warning indicator.
Is the door ajar RTT warning indicator off with the door closed, and on with the door open?

Yes GO to AG2

No GO to Pinpoint Test A

AG2 PERFORM THE IPC (INSTRUMENT PANEL CLUSTER) SELF-TEST
- Using a diagnostic scan tool, perform the IPC self-test.
Are any Diagnostic Trouble Codes (DTCs) recorded?

Yes REFER to DTC Chart: IPC in this information. Refer to Diagnostic Trouble Code (DTC) Chart

No GO to AG3

AG3 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)
- Using a diagnostic scan tool, check the GWM Continuous Memory Diagnostic Trouble Codes (CM DTCs).
Are any Diagnostic Trouble Codes (DTCs) recorded?

Yes REFER to: Communications Network .

No DIAGNOSE any PCM Diagnostic Trouble Codes (DTCs). REFER to: Electronic Engine Controls .