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Reason:ECU Power Output Supply Voltage 1 – Data Valid But Below Normal Operational Range – Moderately Severe Level. Low battery voltage detected by the VGT actuator. Effect:Possible reduced engine performance Circuit Description:The variable geometry turbocharger (VGT) is electronically activated by the VGT actuator. The VGT actuator is a smart device and receives information via the J1939 data link from the primary engine control module (ECM). The VGT actuator performs its own diagnostics and reports malfunctions back to the primary engine ECM, using the J1939 data link. The ECM then decodes the error message and converts it to a fault code....

Reason:EGR Valve Control Circuit Calculated Over Temperature – Data Valid But Above Normal Operational Range – Least Severe Level. High EGR valve driver temperature has been detected. Effect:Possible reduced engine performance Circuit Description:The exhaust gas recirculation (EGR) valve is controlled by a brushless motor located on top of the EGR valve. The EGR valve motor uses three different motor legs to move the valve through its range of motion. The ECM uses the EGR motor A, B, and C wires to command the EGR valve to the appropriate position in order to meet EGR flow targets.The EGR valve motor contains...

Reason:Coolant Level – Data Valid But Below Normal Operational Range – Moderately Severe Level. Low engine coolant level detected. Effect:Possible reduced engine performance. Circuit Description:The coolant level sensor is a switch and is used to measure the level of the engine coolant in the radiator top tank. The coolant level sensor is immersed in the coolant and returns a different signal voltage when immersed in coolant versus being out of coolant. The engine control module (ECM) monitors the change in the signal voltage to determine the level of the engine coolant. Component Location:The engine coolant level sensor is typically located...

Reason:Crankcase Pressure – Data Valid But Above Normal Operating Range – Moderately Severe Level. The crankcase breather filter requires maintenance. Effect:None on performance. Circuit Description:The crankcase pressure sensor is used to monitor the pressure inside the crankcase. The engine control module (ECM) supplies the crankcase pressure sensor a 5 volt reference voltage. When the crankcase pressure is low, the sensor signal voltage is low. When the crankcase pressure is high, the sensor signal voltage is near the 5 volt reference voltage. The ECM monitors the crankcase pressure signal circuit voltage to calculate the pressure of the air within the crankcase....

Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe® Online for applicable fixes to the calibration stored in the ECM. If necessary, recalibrate the ECM. This fault code can only be caused by an internal ECM problem. Repairs are not possible for the ECM. Possible repairs: 1)Replace the ECM. Cummins ISM CM870 (2003-06) Fault Code: 111 PID: S254 SPN: 629 FMI: 12/12 Engine Control Module Critical Internal Failure – Bad Intelligent Device or Component. Error internal to the engine control module (ECM) related to memory hardware malfunctions or internal ECM voltage supply...