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Pinpoint Test AF : The Engine Over-Temperature RTT (RECONFIGURABLE Telltale) Warning Indicator Is Never Or Always On: Notes

Normal Operation and Fault Conditions 

See Engine Over-Temperature RTT Warning Indicator. Refer to: Message Center - System Operation and Component Description .

If the engine coolant temperature data, engine overheat indication request or HVAC heater core temperature messages are missing or invalid for less than 5 seconds, the IPC defaults the motor over-temperature RTT warning indicator to the last indication state (on or off), based upon on the last message received.

If the engine coolant temperature data, engine overheat indication request or HVAC heater core temperature messages are missing or invalid for 5 seconds or longer, the IPC defaults the motor over-temperature RTT warning indicator on.

Possible Sources 

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