Cumminz

Cummins ISB CM550 (1990-94) Fault Code: 278 PID...

Circuit DescriptionThe electronic control module (ECM) enables the lift pump by sending a signal directly to thelift pump. The ECM fast-duty cycles the lift pump ON and OFF during cranking,...

Cummins ISB CM550 (1990-94) Fault Code: 278 PID...

Circuit DescriptionThe electronic control module (ECM) enables the lift pump by sending a signal directly to thelift pump. The ECM fast-duty cycles the lift pump ON and OFF during cranking,...

Cummins ISB CM550 (1990-94) Fault Code: 278 PID...

Circuit DescriptionThe electronic control module (ECM) enables the lift pump by sending a signal directly to the lift pump. The ECM fast-duty cycles the lift pump ON and OFF during...

Cummins ISB CM550 (1990-94) Fault Code: 278 PID...

Circuit DescriptionThe electronic control module (ECM) enables the lift pump by sending a signal directly to the lift pump. The ECM fast-duty cycles the lift pump ON and OFF during...

Cummins ISB CM550 (1990-94) Fault Code: 264 PID...

Circuit DescriptionThis fault indicates a final defect of the temperature sensor. The sensor’s reading indicates an unrealistic value, or the temperature is outside of the signal range check thresholds, -45°C...

Cummins ISB CM550 (1990-94) Fault Code: 264 PID...

Circuit DescriptionThis fault indicates a final defect of the temperature sensor. The sensor’s reading indicates an unrealistic value, or the temperature is outside of the signal range check thresholds, -45°C...

Cummins ISB CM550 (1990-94) Fault Code: 261 PID...

Circuit DescriptionThe fuel temperature sensor is located in the fuel pump. Fuel temperature information ispassed to the engine control module (ECM) through the controller area network datalink. Component LocationThe fuel...

Cummins ISB CM550 (1990-94) Fault Code: 261 PID...

Circuit DescriptionThe fuel temperature sensor is located in the fuel pump. Fuel temperature information ispassed to the engine control module (ECM) through the controller area network datalink. Component LocationThe fuel...

Cummins ISB CM550 (1990-94) Fault Code: 2559 PI...

Circuit DescriptionNormally, switches, accelerators, and other components are connected to the engine controlmodule (ECM) directly through individual wires. Multiplexing allows those same components tobe hard wired to an original equipment...

Cummins ISB CM550 (1990-94) Fault Code: 2559 PI...

Circuit DescriptionNormally, switches, accelerators, and other components are connected to the engine controlmodule (ECM) directly through individual wires. Multiplexing allows those same components tobe hard wired to an original equipment...

Cummins ISB CM550 (1990-94) Fault Code: 243 PID...

Circuit DescriptionThe electronic control module (ECM) enables the exhaust brake by sending a signal to therelay that controls the exhaust brake under certain conditions. Component LocationRefer to the original equipment...

Cummins ISB CM550 (1990-94) Fault Code: 243 PID...

Circuit DescriptionThe electronic control module (ECM) enables the exhaust brake by sending a signal to therelay that controls the exhaust brake under certain conditions. Component LocationRefer to the original equipment...

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