Cummins ISB4.5 CM2150 Fault Code: 435 PID: 100 SPN: 100 FMI: 2 Engine Oil Rifle Pressure – Data Erratic, Intermittent, or Incorrect.
Circuit Description
The engine oil pressure sensor is used by the electronic control module (ECM) to monitor the lubricating oil pressure. If the oil pressure drops below the engine protection limit, the sensor will open and cause Fault Code 435 to log.
The oil pressure sensor is normally closed when the engine is not operating and open when oil pressure is present.
Conditions for Running the Diagnostics
This diagnostic runs when the keyswitch is turned ON and before engine speed is detected.
The diagnostic only runs once per trip.
Conditions for Setting the Fault Codes
This fault code is logged when an open circuit is detected for five consecutive key cycles when the ECM expected a closed circuit at key-on.
Action Taken When the Fault Code is Active
-The ECM illuminates the amber CHECK ENGINE light immediately when the diagnostic runs and fails.
-A default value for the engine oil pressure reading is used.
Conditions for Clearing the Fault Code
-To validate the repair, start the engine and let it idle for 1 minute.
-The ECM will turn off the amber CHECK ENGINE light and the fault code will go inactive immediately after the diagnostic runs and passes.
-This fault code can also be cleared with INSITE™ electronic service tool.
Possible Causes
-Damaged engine oil pressure sensor
-Open circuit in the engine oil pressure sensor signal wire
-Damaged ECM
-Short circuit in the engine oil pressure sensor signal wire to a voltage source.
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