Cumminz

Circuit DescriptionThe engine control module (ECM) provides 5 volt supply to the engine camshaft speed/position sensor on the sensor supply circuit. The ECM also provides a ground on the sensor return circuit. The camshaft speed/position sensor provides a signal to the ECM on the camshaft speed/position sensor signal circuit. This sensor generates a signal to the ECM as the camshaft speed indicator lobe moves past the sensor. The ECM interprets this signal into an engine speed reading and determines engine position. This sensor is used as a backup sensor if the primary engine crankshaft speed/position signal is lost. Conditions for...

Circuit DescriptionThe adaptive cruise control unit communicates with the engine control module (ECM) sending and receiving vehicle speed control messages through the SAE J1939 data link. Component LocationThe location of the adaptive cruise control unit will vary by original equipment manufacturer (OEM). Refer to the OEM service manual for specific location. Conditions for Running the DiagnosticsThis diagnostic runs continuously when the keyswitch is in the ON position. Conditions for Setting the Fault CodesThe ECM does not receive a valid J1939 message from the adaptive cruise control module for more than 1 second. Action Taken When the Fault Code is Active-The...

Cummins ISB CM850 (2003-06) Fault Code: 111 PID: SID 254 SPN: 629 FMI: 12 Engine Control Module – critical internal failure. Error internal to the ECM related to memory hardware failures or internal ECM voltage supply circuits. 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 ISB CM850 (2003-06) Fault Code: 1117 (Auto) PID: SID 251 SPN: 627 FMI: 2 Power Lost Without Ignition Off – Data Erratic, Intermittent, or Incorrect. Supply voltage to the ECM fell below 6.2-VDC momentarily, or the ECM was not allowed to power down correctly (retain battery voltage for 30 seconds after key OFF). This fault is set active if the ECM battery supply voltage drops below + 6.2-VDC while the keyswitch is in the ON position. Make sure the ECM unswitched battery supply is coming directly from the battery and not the starter. If unswitched power is coming from...

Cummins ISB CM850 (2003-06) Fault Code: 1117 (Marine) PID: SID 251 SPN: 627 FMI: 2 Power Lost without Ignition Off – Data Erratic, Intermittent, or Incorrect. Supply voltage to the ECM fell below +6.2-VDC momentarily, or the ECM was not allowed to power down correctly (retain battery voltage for 30 seconds after key OFF). This fault is set active if the ECM battery supply voltage drops below +6.2-VDC while the keyswitch is in the ON position. Make sure the ECM unswitched battery supply is coming directly from the battery and not the starter. If unswitched power is coming from the...