Fault Code: 2963

Description:

Engine Coolant Temperature - Data Valid But Above Normal Operating Range - Least Severe Level

Overview:

Codes:

Fault Code 2963

PID(P): P110

SPN: 110

FMI: 0/15

Lamp: None

Reason:

Engine coolant temperature is above the engine protection warning limit.

Fault Code: 2963

Effect:

power derate Increasing in severity from time of alert

Circuit Description:

The coolant temperature sensor is a variable resistor sensor and is used to measure the temperature of the coolant of the engine. The engine control module (ECM) supplies 5 volts to the coolant temperature signal circuit. The ECM monitors the change in voltage caused by changes in the resistance of the sensor to determine the coolant temperature 

Component Location:

The engine coolant temperature sensor is located on the thermostat housing

Conditions For Running The Diagnostics:

This diagnostic runs continuously when the keyswitch is in the ON position or when the engine is running.

Conditions For Setting The Fault Codes:

The Engine Control Module (ECM) defected the engine coolant temperature was greater than 107°C (225°F)

Action Taken When The Fault Code Is Active:

• The ECM logs the fault code immediately when the diagnostic runs and fails.

Conditions For Clearing The Fault Code:

• To validate the repair, perform a key cycle, start the engine and let it idle for 1 minute.

• The fault code status displayed by the recommended Cummins® electronic service tool or equivalent will change to INACTIVE immediately after the diagnostic runs and passes.

• The "Reset All Faults' command in the recommended Cummins® electronic service tool or equivalent can be used to clear active and inactive faults, as well as extinguish the MIL for OBD applications.