SPN 175 - FMI 0 (Fault Code 214)
Thursday, July 19, 2018
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SPN175 FMI0
Engine Oil Temperature - Data Valid But Above Normal Operating Range - Most Severe Level
CODES:
Fault Code: 214
PID(P), SID(S): P175
SPN: 175
FMI: 0/0
Lamp: Red
REASON: Engine oil temperature signal indicates engine oil 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 engine oil temperature sensor is a variable resistor sensor and is used to measure the temperature of the engine oil. The engine control module (ECM) supplies 5 volts to the engine oil temperature signal circuit. The ECM monitors the change in voltage caused by changes in the resistance of the sensor to determine the engine oil temperature. When the oil temperature is cold, the sensor or thermistor resistance is high. The ECM signal voltage only pulls down a small amount through the sensor to a ground. Therefore, the ECM senses a high signal voltage or low temperature. When the oil temperature is warm, the sensor resistance is low. The signal voltage pulls down a large amount.
Therefore, the ECM senses a low signal voltage or high temperature.
Component Location:
The engine oil temperature sensor is located in the oil rifle.
Conditions for Running the Diagnostics:
This diagnostic runs continuously when the keyswitch is in the ON position and the engine is running.
Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) detected the engine oil temperature was greater than the engine protection limit.
Action Taken When the Fault Code is Active:
• The ECM illuminates the red STOP ENGINE lamp immediately after the diagnostic runs and fails.
• 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:
This fault code indicates that the engine oil temperature has exceeded the maximum engine protection limit for oil temperature. Troubleshoot the cause of high engine oil temperature.
Read More:
SPN 108 - FMI 4 (Fault Code 222)
SPN 108 - FMI 3 (Fault Code 221)
Blog.Teknisi
Engine Oil Temperature - Data Valid But Above Normal Operating Range - Most Severe Level
 |
| Engine Oil Temperature Sensor Circuit |
CODES:
Fault Code: 214
PID(P), SID(S): P175
SPN: 175
FMI: 0/0
Lamp: Red
REASON: Engine oil temperature signal indicates engine oil 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 engine oil temperature sensor is a variable resistor sensor and is used to measure the temperature of the engine oil. The engine control module (ECM) supplies 5 volts to the engine oil temperature signal circuit. The ECM monitors the change in voltage caused by changes in the resistance of the sensor to determine the engine oil temperature. When the oil temperature is cold, the sensor or thermistor resistance is high. The ECM signal voltage only pulls down a small amount through the sensor to a ground. Therefore, the ECM senses a high signal voltage or low temperature. When the oil temperature is warm, the sensor resistance is low. The signal voltage pulls down a large amount.
Therefore, the ECM senses a low signal voltage or high temperature.
Component Location:
The engine oil temperature sensor is located in the oil rifle.
Conditions for Running the Diagnostics:
This diagnostic runs continuously when the keyswitch is in the ON position and the engine is running.
Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) detected the engine oil temperature was greater than the engine protection limit.
Action Taken When the Fault Code is Active:
• The ECM illuminates the red STOP ENGINE lamp immediately after the diagnostic runs and fails.
• 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:
This fault code indicates that the engine oil temperature has exceeded the maximum engine protection limit for oil temperature. Troubleshoot the cause of high engine oil temperature.
Read More:
SPN 108 - FMI 4 (Fault Code 222)
SPN 108 - FMI 3 (Fault Code 221)
Blog.Teknisi
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