 |
|
Intake Manifold Air Temperature High – Critical
|
Overview
| CODE | REASON | EFFECT |
| Fault Code: 155 PID: P105 SPN: 105 FMI: 0/0 LAMP: Red SRT: |
Intake Manifold Air Temperature High – Critical. Intake manifold air temperature signal indicates intake manifold air temperature above engine protection critical limit. |
Progressive engine speed derate increasing in severity from time of alert. Engine will shut down 30 seconds after red stop lamp starts flashing if engine protection shutdown is enabled. |
 Intake Manifold Air Temperature High
|
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. If engine protection shutdown is enabled, the engine will shut down 30 seconds after the red stop lamp starts flashing.
Component Location
The intake manifold air temperature sensor is located in the air intake horn. Refer to Procedure 100-002 for a detailed component location view.
Shop Talk
The intake manifold air temperature sensor measures the temperature of the charge air (fresh air compressed by the turbocharger, cooled by the charge air cooler, and mixed with EGR) as it passes through the intake manifold. This fault code is activated if the intake manifold air temperature is above 132°C [270°F].
NOTE: Prior to running the INSITE™ electronic service tool EGR Valve and EGR Valve/Turbocharger Operational Test, the ECM Calibration Software Phase could possibly need to be updated to the latest Software Phase. The ECM Calibration Phase Software can be checked in INSITE™ electronic service tool, under ‘Features and Parameters’. Expand the selection for ‘System ID and Dataplate’ and go to ‘Calibration Information’. If the Software Phase is earlier than shown below, recalibrate the ECM using the January 2006 INCAL™ CD-ROM, or later. Engines with the Software Phase listed below or later do not require a recalibration.
ISX engines with CM870 (engines built after January 2004) require Software Phase 06050302.
ISX engines with CM870 (engines built before January 2004) require no changes at this time.
This is a warrantable calibration change.
Possible causes of this fault code include:
- Plugged charge air cooler fins
- Restricted airflow through the charge air cooler
- Failed EGR differential pressure sensor, or leaks in sensor tubes
- Undersized charge air cooler
- High turbocharger compressor outlet temperature
- Fouled EGR cooler
- Stuck EGR valve.
Refer to Troubleshooting Fault Code t05-155
;){kind=link}
;){kind=link}