Pinpoint Test AQ: The Engine Over-Temperature RTT (RECONFIGURABLE Telltale) Is Never Or Always On
- Normal Operation and Fault Conditions
See Engine Over-Temperature RTT. REFER to: Message Center - System Operation and Component Description .
If the engine coolant temperature data or the engine overheat indication request messages are missing or invalid for less than 5 seconds, the IPC defaults the engine over-temperature RTT to the last indication state (on or off), based upon on the last message received.
If the engine coolant temperature data or the engine overheat indication request messages are missing or invalid for 5 seconds or longer, the IPC defaults the engine over-temperature RTT on.
Possible Sources
- Communication concern
- GWM concern
- PCM
- IPC
- AQ1 CHECK THE MESSAGE CENTER OPERATION
- Ignition ON.
- Close all doors, the hood and luggage compartment lid.
- Clear all message center warnings by pressing the OK button for each warning present.
- Monitor the door ajar RTT.
- Open the driver door.
- Clear the message center popup warning.
- Monitor the door ajar RTT.
Is the door ajar RTT off with the door closed, and on with the door open?
Yes GO to AQ2 No GO to Pinpoint Test AO - AQ2 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: Instrument Panel Cluster (IPC) . No GO to AQ3 - AQ3 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 GO to AQ4 - AQ4 PERFORM THE PCM (POWERTRAIN CONTROL MODULE) KOEO (KEY ON, ENGINE OFF) SELF-TEST
- Using a diagnostic scan tool, perform the PCM KOEO self-test.
Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes REFER to the appropriate Electronic Engine Controls article. No If the engine over-temperature RTT is never on, the system is operating correctly at this time. If the engine over-temperature RTT is always on, Refer to PCM Guided Routine .