Description:

Error code ECU 001347.05 is triggered when the ECU detects a mismatch between the measured pump current and the commanded pump current. This condition, coupled with high circuit resistance, indicates an open circuit in the fuel pressure control valve 1.

Reaction:

The ECU may limit or adjust the operation of the pump control valve to prevent potential damage due to the current mismatch and high resistance.

Recommendations:

• Inspect Control Valve Wiring: Check the wiring and connectors leading to the fuel pressure control valve 1 for signs of damage, corrosion, or loose connections that could cause high resistance readings.
• Measure Circuit Resistance: Use a multimeter to measure the resistance in the control valve circuit. High resistance readings confirm an open circuit.
• Check for Open Circuits: Inspect the wiring for any breaks or disconnects. Pay close attention to the harness and connectors.
• Test Control Valve Operation: Verify that the fuel pressure control valve 1 is functioning correctly and responding to ECU commands.
• Repair or Replace Faulty Components: Address any identified issues by repairing or replacing damaged wiring, connectors, or the control valve itself.
• Reset ECU and Verify Operation: After making the necessary repairs, reset the ECU to clear the error code and test the system to confirm that the control valve operates correctly and no further errors are detected.

Note:

Maintaining proper current and resistance levels in the pump control valve circuit is essential for reliable fuel pressure control. Regular inspections and timely repairs can help prevent open circuit issues.