CM850 Electronic Control System – FAULT CODE 146 (QSB Marine Application)

Engine Coolant Temperature – Data Valid but Above Normal Operational Range – Moderately Severe Level


Overview

CODE REASON EFFECT
Fault Code: 146
PID: P110
SPN: 110
FMI: 0/16
LAMP: Amber
SRT: 

Engine Coolant Temperature – Data Valid but Above Normal Operational Range – Moderately Severe Level. Engine coolant temperature signal indicates engine coolant temperature is above engine protection warning limit.

Marine: calibration dependent.

Engine Coolant Temperature Sensor Circuit
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Circuit Description

The engine coolant temperature sensor is used by the Electronic Control Module (ECM) to monitor the engine coolant temperature. The ECM monitors the voltage on the signal pin and converts this to a temperature value. The engine coolant temperature value is used by the ECM for the engine protection system and engine emissions control.

Component Location

The engine coolant temperature sensor is located on the exhaust side of the engine near the thermostat housing. Refer to Procedure 100-002 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.

Refer to Troubleshooting Fault Code t05-146

Last Modified:  08-Jul-2010