Engine Coolant Temperature

The engine coolant temperature indicator may only be ON during RUN. The IPC illuminates the engine coolant temperature indicator under the following conditions:
^ During the bulb check.
^ The engine coolant temperature is greater than 128°C (262°F). The IPC also sends a class 2 serial data message requesting 5 chimes to sound and displays the ENGINE COOLANT HOT/IDLE ENGINE message on the DIC:

The IPC controls the operation of the engine coolant temperature indicator. The IPC will turn OFF the indicator and message when the engine coolant temperature falls below 125°C (257°F).