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

WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.

Normal Operation and Fault Conditions 

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

If the engine coolant temperature data or engine overheat indication request 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 or engine overheat indication request 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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