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Cummins ISB4.5 CM2150 Fault Code: 321 PID: SID 4 SPN: 654 FMI: 6 Injector Solenoid Driver Cylinder 4 Circuit – Current Above Normal or Grounded Circuit.
Posted by PerDiezel Solutions on
Circuit DescriptionThe injector solenoid valves are actuated by the electronic control module (ECM) to control fuel metering and timing. Each injector solenoid is connected to the ECM by a supply and a return wire. An electrical pulse is sent to the injector from the ECM on the supply wire and returns to the ECM on the return wire after actuating the solenoid. Each solenoid valve is normally open, and it is only closed by an electrical pulse from the ECM during fuel injection and metering. Component LocationThe ISM has an internal actuator harness that connects to the external engine harness...
Cummins ISB4.5 CM2150 Fault Code: 322 PID: SID 6 SPN: 651 FMI: 5 Injector Solenoid Driver Cylinder 1 Circuit – Current Below Normal or Open Circuit.
Posted by PerDiezel Solutions on
Circuit DescriptionThe injector solenoid valves control fueling quantity and injection timing. The electronic control module (ECM) energizes the solenoid by closing a high-side and a low-side switch. There are two high-side switches and four low-side switches inside the ECM. The injectors for cylinder numbers 1 and 2 (front bank) share a single high-side switch that connects the injector circuit to the source of high voltage inside the ECM. Likewise, the injectors for cylinder numbers 3 and 4 (rear bank) also share a single high-side switch. Each injector circuit has a dedicated low-side switch that completes the circuit path to ground...
Cummins ISB4.5 CM2150 Fault Code: 3226 PID: SPN: 91 FMI: 9 SAE J1939 Multiplexed Accelerator Pedal or Lever Sensor System – Abnormal Update Rate.
Posted by PerDiezel Solutions on
Circuit DescriptionNormally, switches, accelerators, and other components are connected to the engine ECM directly through individual wires. Multiplexing allows those same components to be hard wired to an 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® engine ECM over the SAE J1939 data link. Messages sent from OEM VECU’s or transmission ECU’s are received by the Cummins® engine ECM and used for controlling the engine. The Cummins® engine ECM and...
Cummins ISB4.5 CM2150 Fault Code: 3228 PID: SPN: 191 FMI: 9 Transmission Output Shaft Speed – Abnormal Update Rate.
Posted by PerDiezel Solutions on
Circuit DescriptionNormally, switches, accelerators, and other components are connected to the 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 SAE J1939 data link. Messages sent from OEM VECUs or transmission ECUs are received by the Cummins® ECM and are used for controlling the engine. The Cummins® ECM and...
Cummins ISB4.5 CM2150 Fault Code: 323 PID: SID 6 SPN: 656 FMI: 5 Injector Solenoid Driver Cylinder 5 Circuit – Current Below Normal or Open Circuit.
Posted by PerDiezel Solutions on
Circuit DescriptionThe injector solenoid valves control fueling quantity and injection timing. The electronic control module (ECM) energizes the solenoid by closing a high-side and a low-side switch. There are two high-side switches and six low-side switches inside the ECM. The injectors for cylinders 1 and 2 (front bank) share a single high-side switch that connects the injector circuit to the source of high voltage inside the ECM. Likewise, the injectors for cylinders 3 and 4 (rear bank) also share a single high-side switch. Each injector circuit has a dedicated low-side switch that completes the circuit path to ground inside the...
