SPN 100 - FMI 18 (Fault Code 143)
Friday, July 20, 2018
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SPN100 FMI18
Engine Oil Rifle Pressure - Data Valid But Below Normal Operating Range - Moderately Severe Level
CODES:
Fault Code: 143
PID(P), SID(S): P100
SPN: 100
FMI: 1/18
Lamp: Amber
REASON: Engine oil pressure signal indicates engine oil pressure is below the engine protection
warning limit.
EFFECT: Progressive power derate increasing in severity from time of alert.
Circuit Description:
An engine oil pressure switch or oil pressure sensor is used by the engine control module (ECM) to monitor the lubricating oil pressure. For engines with an oil pressure switch, the switch is normally closed when the engine is not running and open when oil pressure is present. For engines with an oil pressure sensor, the ECM will detect a low signal voltage at operating conditions when the oil pressure is low. The ECM will detect a high signal voltage at operating conditions when the oil pressure is high.
Component Location:
The engine oil pressure 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 pressure was less than the engine protection limits for more than 5 seconds.
Action Taken When the Fault Code is Active:
• The ECM illuminates the amber CHECK ENGINE lamp immediately when the diagnostic runs and fails.
• The torque output of the engine will be reduced.
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 amber CHECK 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, as well as extinguish the MIL for OBD applications.
Shop Talk:
Possible causes of this fault code include:
-Low oil pressure.
• Incorrect oil level.
-Degraded, diluted or incorrect engine oil.
Read More:
SPN 110 - FMI 4 (Fault Code 145)
SPN 110 - FMI 3 (Fault Code 144)
Blog.Teknisi
Engine Oil Rifle Pressure - Data Valid But Below Normal Operating Range - Moderately Severe Level
 |
| Engine Oil Rifle Pressure Sensor Circuit |
CODES:
Fault Code: 143
PID(P), SID(S): P100
SPN: 100
FMI: 1/18
Lamp: Amber
REASON: Engine oil pressure signal indicates engine oil pressure is below the engine protection
warning limit.
EFFECT: Progressive power derate increasing in severity from time of alert.
Circuit Description:
An engine oil pressure switch or oil pressure sensor is used by the engine control module (ECM) to monitor the lubricating oil pressure. For engines with an oil pressure switch, the switch is normally closed when the engine is not running and open when oil pressure is present. For engines with an oil pressure sensor, the ECM will detect a low signal voltage at operating conditions when the oil pressure is low. The ECM will detect a high signal voltage at operating conditions when the oil pressure is high.
Component Location:
The engine oil pressure 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 pressure was less than the engine protection limits for more than 5 seconds.
Action Taken When the Fault Code is Active:
• The ECM illuminates the amber CHECK ENGINE lamp immediately when the diagnostic runs and fails.
• The torque output of the engine will be reduced.
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 amber CHECK 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, as well as extinguish the MIL for OBD applications.
Shop Talk:
Possible causes of this fault code include:
-Low oil pressure.
• Incorrect oil level.
-Degraded, diluted or incorrect engine oil.
Read More:
SPN 110 - FMI 4 (Fault Code 145)
SPN 110 - FMI 3 (Fault Code 144)
Blog.Teknisi
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