Engine Coolant

ENGINE COOLANT
The IPC illuminates the engine coolant indicator and activates an audible warning when the following occurs:
^ The IPC determines that the coolant temperature is greater than 128°C (262°F). The IPC receives a class 2 message from the PCM indicating the coolant temperature.
^ The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 3 seconds.

The IPC turns OFF the engine coolant indicator when the engine coolant falls below 125°C (257°F).

CHECK COOLANT LEVEL - 2
The IPC illuminates the CHECK COOLANT LEVEL - 2 indicator in the DIC when the IPC detects that the coolant level is low (signal circuit is high).

ENGINE COOLANT HOT/IDLE ENGINE - 44
The IPC illuminates the ENGINE COOLANT HOT/IDLE ENGINE - 44 indicator in the DIC and activates an audible warning when the IPC determines that the coolant temperature is greater than 128 °C (262 °F). The IPC receives a class 2 message from the PCM indicating the coolant temperature.

The IPC turns OFF the indicator when the engine coolant falls below 125°C (257°F).

ENGINE HOT - AC OFF - 16
The IPC illuminates the ENGINE HOT - AC OFF - 16 indicator in the DIC when the heater and A/C programmer detects that the engine temperature is above the normal operating range and has turned off the air conditioning in order to allow the engine to cool down. The IPC receives a class 2 message from the heater and A/C programmer requesting illumination.

ENGINE OVERHEATED/STOP ENGINE - 42
The IPC illuminates the ENGINE OVERHEATED/STOP ENGINE - 42 indicator in the DIC and activates an audible warning when the Powertrain Control Module (PCM) detects that the engine temperature is above the normal operating range. The IPC receives a class 2 message from the PCM requesting illumination.