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Isuzu US-IDSS 2024 Diagnostic is a comprehensive tool for the effective maintenance and repair of Isuzu vehicles. It integrates advanced diagnostic features to assist technicians in identifying and resolving issues promptly. This system supports a wide range of Isuzu models, ensuring compatibility with both US and Canadian specifications. Its capabilities include vehicle recognition, fault code analysis, and real-time data access to streamline the diagnostic process.
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Cummins ISB CM550 (1990-94) Fault Code: 365 PID: SID 233 SPN: 1077 FMI: 4 Fuel Pump Voltage Out of Range Error Low

Circuit Description
Power is supplied to the through a relay. When the engine control module (ECM) switches the relay, power is supplied from the battery, through the relay, to the fuel pump.

Component Location
Internal to the pump.

Shop Talk
The fuel pump control module compares battery voltage to supply voltage while energizing the fuel metering solenoid. If this measured voltage drop is excessive, there is high resistance in the fuel pump power supply circuit.

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