ECU 000654.05 – Open Circuit in EUI for Cylinder No. 4, Resistance Too High. John Deere System Advisory.
ECU 000654.05 (ECU 654.05)
Code: 000654.05
Shortcode: 654.05
Description:
This error code, ECU 000654.05, is generated when the ECU detects an open circuit in the electronic unit injector (EUI) for cylinder no. 4, indicating that the circuit resistance is too high. This condition can result in a failure to deliver fuel to the cylinder.
Reaction:
The ECU may disable the injector to prevent engine damage and to alert the operator of the fault.
Recommendations:
- Inspect Injector Wiring: Check the wiring and connectors for the injector in cylinder no. 4 for signs of damage, corrosion, or disconnections.
- Measure Circuit Resistance: Use a multimeter to measure the resistance in the injector circuit to confirm the open circuit condition.
- Repair or Replace Wiring: Address any issues found by repairing or replacing damaged wires or connectors to restore proper circuit continuity.
- Test Injector Functionality: After repairs, test the injector to ensure it receives the correct voltage and operates correctly.
- Reset ECU and Conduct System Tests: Reset the ECU and perform system tests to confirm that the injector circuit is functioning correctly and no further errors are detected.
Note:
Maintaining proper wiring and connections for injectors is crucial for accurate fuel delivery and engine performance.