CM850 Electronic Control System – FAULT CODE 153

Intake Manifold Air Temperature Sensor Circuit – Voltage Above Normal or Shorted to High Source


Overview

CODE REASON EFFECT
Fault Code: 153
PID: P105
SPN: 105
FMI: 3/3
LAMP: Amber
SRT: 

Intake Manifold Air Temperature Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at intake manifold air temperature circuit.

Possible white smoke. Fan will stay ON if controlled by the ECM. No engine protection for intake manifold air temperature.

Marine:
calibration dependent.

Intake Manifold Air Pressure/Temperature Sensor Circuit
SMALL | MEDIUM | LARGE

Circuit Description

The intake manifold air temperature sensor monitors intake manifold air temperature and passes information to the electronic control module (ECM)
through the engine harness. If the intake manifold air temperature becomes too high, it will cause a derate condition.

Component Location

The intake manifold air temperature sensor is located in the air intake manifold. Refer to Procedure 100-002
for a detailed component location view.

Shop Talk

The intake manifold air temperature sensor shares return wires in the engine harness with other sensors. Opens and shorts in the engine harness can cause multiple fault codes to be active. Check active fault codes with multiple counts first.

Possible causes of this fault code include:

  • Open return circuit in the harness, connectors, or sensor
  • Open signal circuit or shorted to voltage source.

Temperature (°F)
Temperature (°C)
Resistance (ohms)
32
0
29k to 36k
77
25
9k to 11k
104
40
4.9k to 5.8k
212
100
600 to 700

Refer to Troubleshooting Fault Code t05-153

Last Modified:  08-Jul-2010