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Home >> Lincoln >> 2018 >> MKZ Select, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 593 (Information Center - Instrumentation, Message Center, And Warning Chimes) >> Diagnosis And Testing >> Instrumentation, Message Center and Warning Chimes >> Pinpoint Tests >> Pinpoint Test Ar : The Engine Over-Temperature RECONFIGURABLE Telltale (RTT) Is Never Or Always On >> Notes

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

WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

Normal Operation and Fault Conditions 

See Engine Over-Temperature Reconfigurable Telltale (RTT). Refer to Information And Message Center .

NOTE: If DTC U0100:00 sets in the IPC, other observable symptoms can be an inoperative tachometer, speedometer or odometer.

If the IPC does not receive the engine coolant temperature and engine overheat mitigation active messages from the PCM for less than 5 seconds, the IPC defaults the engine over-temperature Reconfigurable Telltale (RTT) to its last state (on or off) based on the last message received.

If the IPC does not receive the engine coolant temperature and engine overheat mitigation active messages from the PCM 5 seconds or longer, the IPC sets DTC U0100:00 and defaults the engine over-temperature Reconfigurable Telltale (RTT) on.

Possible Sources 

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