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FAULT CODE 154

Intake Manifold 1 Temperature Sensor Circuit - Voltage Below Normal or Shorted to Low Source

Overview


CODE

REASON

EFFECT

Fault Code: 154

Intake Manifold 1 Temperature Sensor Circuit - Voltage Below

Possible white smoke. Fan will stay ON if controlled by

PID:

Normal or Shorted to Low Source. Low signal voltage detected

the engine control module (ECM). No engine protection

SPN: 105

at intake manifold 1 temperature circuit.

for intake manifold air temperature.

FMI: 4/4



LAMP: Amber



SRT:



Intake Manifold 1 Temperature Sensor Circuit


Circuit Description


The intake manifold 1 temperature sensor monitors intake manifold air temperature and passes information to the ECM through the engine harness.


Component Location


The intake manifold 1 temperature sensor is located in the air intake manifold. Use the following procedure for a detailed component location view. Refer to Procedure 100-002 in Section E.

Shop Talk


The intake manifold 1 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 fault codes with multiple counts first.


Possible causes of this fault code include:


  • Signal circuit shorted to ground in the harness.

  • Signal circuit shorted to return or ground in the sensor.


Temperature (°C)

Temperature [°F]

Resistance (ohms)

0

32

29k to 36k

25

77

9k to 11k

40

104

4.9k to 5.8k

100

212

600 to 700

Refer to Troubleshooting Fault Code t05-154.


Last Modified: 28-Nov-2012

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