Cummins ISX15 CM2250 (2010-12) Fault Code: 227 PID: SID 211 SPN: 3510 FMI: 3 Sensor Supply 2 Circuit- Voltage Above Normal or Shorted to High Source
Circuit Description
The sensor supply 2 pin of the electronic control module (ECM) provides 5 volt for the camshaft position sensor, intake manifold pressure/temperature sensor, crankcase pressure sensor, engine oil pressure sensor (if equipped), turbocharger compressor intake pressure/temperature sensor (if equipped), and barometric pressure sensor (if equipped).
Component Location
Sensor supply 2 is located in the ECM and provides a 5 VDC supply to various engine sensors. The supply voltage is spliced off in the engine harness to each sensor it supports.
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 ECM detects that the sensor supply 2 signal voltage is more than 5.2-VDC for more than 1 second.
Action Taken When the Fault Code is Active
The ECM illuminates the amber CHECK ENGINE lamp and/or the Malfunction Indicator Lamp (MIL) immediately when the diagnostic runs and fails.
The backup camshaft position sensor will not be functional.
A default value is used for all other sensors on the sensor supply 2 circuit.
Conditions for Clearing the Fault Code
To validate the repair, start the engine and let it idle for 1 minute.
The fault code status displayed by INSITE? electronic service tool will change to INACTIVE immediately after the diagnostic runs and passes.
The ECM will turn off the amber CHECK ENGINE lamp after the diagnostic runs and passes.
For On-Board Diagnostic (OBD) engines, the ECM will turn off the MIL after three consecutive trips where the diagnostic runs and passes.
The Reset All Faults command in INSITE? electronic service tool can be used to clear active and inactive faults, as well as extinguish the MIL for OBD engines.
Shop Talk
High voltage on the (+) 5 volt supply line can be caused by a short to battery voltage in the engine harness or connectors, or a malfunctioning ECM.
Possible Cause:
1) Engine Harness
2) ECM calibration
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