This condition indicates that the coolant temperature is above 106 °C (223 °F) for the C-10 or C-12 and the coolant temperature is above 111 °C (232 °F) for the C-15.
System Response:
"DIAG" will be displayed next to the status for "Engine Coolant Temperature" on the Caterpillar Electronic Technician (Cat ET). The check engine lamp and the warning lamp will illuminate.
If a high coolant temperature lamp is installed, the high coolant temperature lamp will turn on instead of the warning lamp.
Customer passwords are required to clear this diagnostic code.
The engine will be derated. The engine power and the vehicle speed will be limited. The amount of derate depends on the engine coolant temperature. If the "Engine Monitoring" parameter is programmed to "Shutdown", the engine will be shutdown once this code has been active for 20 seconds.
Note: If the "Engine Monitoring" parameter is programmed to "Warning", the engine power is not affected.
Test Step 1. Check the Cooling System
Refer to Testing and Adjusting, "Cooling System - Check".
Results:
- OK - STOP