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Isuzu E-IDSS 2023 Diagnostic Software is designed for efficient diagnostics and repairs of Isuzu heavy machinery and trucks. It combines advanced technology with user-friendly features to facilitate accurate troubleshooting. The software supports a wide range of Isuzu models and enhances the repair process. Installation is straightforward and can be performed remotely via TeamViewer, ensuring quick setup for technicians.
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Cummins ISB CM550 (1990-94) Fault Code: 364 PID: 1689 SPN: 1077 FMI: 9 Engine Control Module (ECM) to Pump Communications Error

Circuit Description
This circuit is used to communicate fueling, timing, and pump status messages between the ECM and pump controller. If this link is lost, the pump will operate in a backup mode based on the idle signal (pin 4).

Component Location
The datalink is located within the ECM and fuel pump control module.

Shop Talk
1) The datalink is used to communicate fueling and timing commands, as well as pump status
messages. If the datalink is lost, the pump will operate in backup mode based on idle signal (pin 4 at fuel pump connector).
2) This fault code will be active if the fuel pump power supply is inadequate.
3) When troubleshooting for this fault, suspect that one or a combination of the following can be the cause: The ECM, fuel pump, or wiring harness/fuses/relay.

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