SPN 105 - FMI 0 (Fault Code 155)
Friday, July 20, 2018
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SPN105 FMI0
Intake Manifold 1 Temperature - Data Valid But Above Normal Operating Range - Most Severe Level
CODES:
Fault Code: 155
PID(P), SID(S): P105
SPN: 105
FMI: 0/0
Lamp: Red
REASON: Intake manifold air temperature signal indicates intake manifold air temperature above engine protection critical limit.
EFFECT: Progressive power and/or speed derate increasing in severity from time of alert. If the
Engine Protection Shutdown feature is enabled, the engine will shut down 30 seconds after the red STOP lamp starts flashing.
Circuit Description:
The intake manifold air temperature sensor monitors intake manifold air temperature and passes information to the electronic control. The intake manifold 1 temperature sensor is a variable resistor sensor and is used to measure the temperature of the air entering the intake manifold of the engine. The electronic control module (ECM) supplies 5 volts to the intake manifold temperature SIGNAL circuit. The ECM monitors the change in voltage caused by changes in the resistance of the sensor to determine the intake manifold temperature.
Component Location:
The intake manifold 1 pressure/temperature sensor is located in the air intake manifold.
Conditions for Running the Diagnostics:
This diagnostic runs continuously when the keyswitch is in the ON position or when the engine is running.
Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) detected the intake manifold air temperature was greater than 132°C [270°F] for 5 seconds.
Action Taken When the Fault Code is Active:
• The ECM illuminates the red STOP ENGINE lamp immediately after the diagnostic runs and fails.
• A default value is used for the intake manifold temperature reading.
• The torque output of the engine will be reduced.
• Maximum engine operating speed will be decreased.
• The engine will be shut down if the Engine Protection Shutdown feature is enabled.
Conditions for Clearing the Fault Code:
• To validate the repair, perform a key cycle, start the engine and let it idle for 1 minute.
• The fault code status displayed by the recommended Cummins® electronic service tool or equivalent will change to INACTIVE immediately after the diagnostic runs and passes.
• The ECM will turn off the red STOP ENGINE lamp immediately after the diagnostic runs and passes.
• The "Reset All Faults" command in the recommended Cummins® electronic service tool or equivalent can be used to clear active and inactive faults.
Shop Talk:
The intake manifold air temperature sensor measures the temperature of the charge-air as it passes through the intake manifold.
Possible causes of this fault code include:
• Restricted air flow through the charge-air cooler
• Undersized charge-air cooler
• High turbocharger compressor outlet temperature.
Read More:
SPN 175 - FMI 3 (Fault Code 212)
SPN 3510 - FMI 4 (Fault Code 187)
Blog.Teknisi
Intake Manifold 1 Temperature - Data Valid But Above Normal Operating Range - Most Severe Level
 |
| Intake Manifold Pressure/Temperature Sensor Circuit |
CODES:
Fault Code: 155
PID(P), SID(S): P105
SPN: 105
FMI: 0/0
Lamp: Red
REASON: Intake manifold air temperature signal indicates intake manifold air temperature above engine protection critical limit.
EFFECT: Progressive power and/or speed derate increasing in severity from time of alert. If the
Engine Protection Shutdown feature is enabled, the engine will shut down 30 seconds after the red STOP lamp starts flashing.
Circuit Description:
The intake manifold air temperature sensor monitors intake manifold air temperature and passes information to the electronic control. The intake manifold 1 temperature sensor is a variable resistor sensor and is used to measure the temperature of the air entering the intake manifold of the engine. The electronic control module (ECM) supplies 5 volts to the intake manifold temperature SIGNAL circuit. The ECM monitors the change in voltage caused by changes in the resistance of the sensor to determine the intake manifold temperature.
Component Location:
The intake manifold 1 pressure/temperature sensor is located in the air intake manifold.
Conditions for Running the Diagnostics:
This diagnostic runs continuously when the keyswitch is in the ON position or when the engine is running.
Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) detected the intake manifold air temperature was greater than 132°C [270°F] for 5 seconds.
Action Taken When the Fault Code is Active:
• The ECM illuminates the red STOP ENGINE lamp immediately after the diagnostic runs and fails.
• A default value is used for the intake manifold temperature reading.
• The torque output of the engine will be reduced.
• Maximum engine operating speed will be decreased.
• The engine will be shut down if the Engine Protection Shutdown feature is enabled.
Conditions for Clearing the Fault Code:
• To validate the repair, perform a key cycle, start the engine and let it idle for 1 minute.
• The fault code status displayed by the recommended Cummins® electronic service tool or equivalent will change to INACTIVE immediately after the diagnostic runs and passes.
• The ECM will turn off the red STOP ENGINE lamp immediately after the diagnostic runs and passes.
• The "Reset All Faults" command in the recommended Cummins® electronic service tool or equivalent can be used to clear active and inactive faults.
Shop Talk:
The intake manifold air temperature sensor measures the temperature of the charge-air as it passes through the intake manifold.
Possible causes of this fault code include:
• Restricted air flow through the charge-air cooler
• Undersized charge-air cooler
• High turbocharger compressor outlet temperature.
Read More:
SPN 175 - FMI 3 (Fault Code 212)
SPN 3510 - FMI 4 (Fault Code 187)
Blog.Teknisi
Hi,my Volvo 500kva genset trips on fault code 155.intake manifold 1 temperature-high most severe.What can I do solve this problem
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