|
Engine Coolant Temperature 1 Sensor Circuit – Voltage Above Normal or Shorted to High Source
|
Overview
| CODE | REASON | EFFECT |
| Fault Code: 144 PID: P110 SPN: 110 FMI: 3/3 LAMP: Amber SRT: |
Engine Coolant Temperature 1 Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage or open circuit detected at engine coolant temperature circuit. |
Marine: None, no engine protection for circuit or sensor failure. |
 Engine Coolant Temperature Sensor Circuit
|
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 thermostat housing. Refer to Procedure 100-002 for a detailed component location view.
Shop Talk
Before troubleshooting Fault Code 144, check for multiple faults.
The engine coolant temperature sensor shares return wires in the engine harness with other sensors. An open return can cause multiple fault codes to be active.
Possible causes of this fault code include:
- Open return circuit in the harness, connectors, or sensor.
- Open signal circuit or shorted to a voltage source.
|
Temperature (°C)
|
Temperature (°F)
|
Resistance (ohms)
|
|
0
|
32
|
30k to 37k
|
|
25
|
77
|
9.3k to 10.7k
|
|
50
|
122
|
3.2k to 3.8k
|
|
80
|
176
|
1.0k to 1.3k
|
|
95
|
203
|
700 to 800
|
Refer to Troubleshooting Fault Code t05-144
;){kind=link}
;){kind=link}