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The ISUZU G-IDSS Domestic Japan 2024 is an advanced diagnostic tool designed for Isuzu vehicles. This version introduces several key features that enhance vehicle maintenance and streamline diagnostics. With improved user interfaces and multi-language support, technicians can efficiently navigate the system. The G IDSS also offers advanced programming capabilities, allowing for precise control updates and accurate diagnostics.
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Cummins ISB CM550 (1990-94) Fault Code: 278 PID: 73 SPN: 1075 FMI: 11 (Ford Truck Application) Lift Pump Circuit

Circuit Description
The 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 cranking, and it enables
the pump once the engine has started.

Component Location
The lift pump is mounted to the engine block on the intake side, toward the rear of the engine.

Shop Talk
1) The lift pump is turned on for approximately 5 seconds when the keyswitch is first turned
ON. With the hood raised, it is possible to hear the lift pump running when the keyswitch
is turned ON.
2) Loose battery connections can sometimes cause this fault code.

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