CM850 Electronic Control System – FAULT CODE 1716

Auxiliary Temperature Sensor Input 1 Circuit – Root Cause Not Known


Fault Code: 1716
SPN: 411
FMI: 11
LAMP: None

Auxiliary Temperature Sensor Input 1 Circuit – Root Cause Not Known. High temperature detected by the OEM temperature sensor or by the engine coolant temperature sensor.

Possible engine power derate.

OEM Temperature/Pressure Sensor Circuit

Circuit Description

The OEM has the option of wiring a temperature sensor input to the Cummins® ECM. A specific calibration is then created to recognize this temperature sensor input. This fault code is activated when the temperature input from the OEM sensor exceeds the engine protection limit defined by the OEM. Depending on OEM requirements, an Engine Protection derate may be associated with this fault code. This fault code can also be used to indicate high engine coolant temperature on certain applications.

Component Location

The OEM pressure or temperature sensor input will vary depending on application. Refer to the OEM troubleshooting manual for sensor location. The engine coolant temperature sensor is located on the thermostat housing. Refer to Refer to Procedure Procedure 100-002 (Engine Diagrams), in Section E for a detailed component location view.

Shop Talk

This fault code indicates that coolant temperature has exceeded the engine protection limits for high coolant temperature. Refer to Engine Coolant Temperature Above Normal symptom troubleshooting tree.

On-Board Diagnostics (OBD) information:

  • The ECM illuminates the appropriate amber or red fault lamp when the diagnostic runs and fails
  • The ECM turns off the appropriate fault lamp when the diagnostic runs and passes.

Refer to Troubleshooting Fault Code t05-1716

Last Modified:  08-Jul-2010