Pinpoint Test Z : The Engine Over-Temperature Warning Indicator Is Never Or Always On: Notes

WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

Normal Operation and Fault Conditions

See Engine Over-Temperature Warning Indicator. REFER to: Instrument Panel Cluster (IPC) - System Operation and Component Description .

See Engine Over-Temperature RTT. REFER to: Message Center - 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 engine over-temperature warning indicator or 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 request or engine overheat indication request messages are missing or invalid for 5 seconds or longer, the IPC sets DTC U0100:00 and defaults the engine over-temperature warning indicator or engine over-temperature RTT on.

Possible Sources

Communication concern
Message center concern
GWM concern
PCM input concern
IPC