Pinpoint Test N: The Acc (Adaptive Cruise Control) RTT (RECONFIGURABLE Telltale) Indicator Is Never Or Always On

Normal Operation and Fault Conditions
See Cruise Control RTT Indicator. REFER to: Instrument Panel Cluster (IPC) - System Operation and Component Description .

If the cruise control status, cruise control override or cruise control set speed display message is missing or deemed invalid by the IPC for less than 5 seconds, the IPC defaults the cruise control RTT indicator to the last indication state (on or off), based upon the last message received.

If the cruise control status, cruise control override or cruise control set speed display message is missing or if the data is deemed invalid by the IPC for 5 seconds or longer, the IPC defaults the cruise control RTT indicator off.

Possible Sources
- Communication concern
- Cruise control concern
- GWM concern
- IPC

N1 CHECK THE MESSAGE CENTER OPERATION
- Ignition ON.
- Monitor the battery state of charge gauge display.
Does the battery state of charge gauge display in the message center?

Yes GO to N2

No GO to Pinpoint Test A

N2 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 Diagnostic Trouble Code (DTC) Chart .

No GO to N3

N3 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: Controller Area Network (CAN) Module Communications Network .

No DIAGNOSE the cruise control system. REFER to: Cruise Control .