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Reason:Injector Power Supply – Bad Intelligent Device or Component. The ECM measured injector boost voltage is low. Effect:Possible reduced engine performance. Circuit Description:Between each injection event, the Engine Control Module (ECM) attempts to recharge the injector power supply. The injector power supply consists of a bank of capacitors; if this power supply is maintained at high voltage. Recharging is accomplished by recovering energy stored in the injector solenoids. For the injector power supply to remain fully charged, there must be good ECM battery power and ground, a good engine speed sensor, and good injector circuits. Component Location:The engine harness connects...

Reason:Sensor Supply 1 Circuit – Voltage Below Normal or Shorted to Low Source. Low voltage detected at sensor supply number 1 circuit. Effect:Possible reduced engine performance. Circuit Description:The sensor supply 1 circuit of the engine control module (ECM) provides a 5 volt supply to various sensors on the engine harness. Refer to the wiring diagram for sensor supply identification. Component Location:Sensor Supply 1 originates in the Engine Wiring Harness portion of the ECM. It supplies 5 volts to sensors in the engine wiring harness. Conditions for Running the Diagnostics:This diagnostic runs continuously when the keyswitch is in the ON position...

Reason:Wheel-Based Vehicle Speed – Received Network Data In Error. The J1939 multiplexing controller has indicated a malfunction of the wheel-based vehicle speed sensor Effect:None on performance Circuit Description:Normally, switches, accelerators, and other components are connected to the engine control module (ECM) directly through individual wires. Multiplexing allows those same components to be hard wired to an original equipment manufacturer (OEM) vehicle electronic control unit (VECU) or transmission electronic control unit (ECU) in the cab. Then component values and states from components such as sensors, accelerators, and switches can be transmitted from the OEM VECU to the Cummins® ECM over the...

Reason:Wheel-Based Vehicle Speed – Received Network Data In Error. The J1939 multiplexing controller has indicated a malfunction of the wheel-based vehicle speed sensor Effect:None on performance Circuit Description:Normally, switches, accelerators, and other components are connected to the engine control module (ECM) directly through individual wires. Multiplexing allows those same components to be hard wired to an original equipment manufacturer (OEM) vehicle electronic control unit (VECU) or transmission electronic control unit (ECU) in the cab. Then component values and states from components such as sensors, accelerators, and switches can be transmitted from the OEM VECU to the Cummins® ECM over the...

Reason:Accelerator Pedal or Lever Idle Validation Switch – Received Network Data In Error. The J1939 multiplexing controller has indicated a malfunction of the accelerator pedal or lever idle validation switch Effect:Engine will only idle. Circuit Description:Normally, switches, accelerators, and other components are connected to the engine control module (ECM) directly through individual wires. Multiplexing allows those same components to be hard wired to an original equipment manufacturer (OEM) vehicle electronic control unit (VECU) or transmission electronic control unit (ECU) in the cab. Then component values and states from components such as sensors, accelerators, and switches can be transmitted from the...