Description:

This error code, ECU 001321.05, is set when the ECU detects high resistance in the engine starter solenoid lockout relay circuit. High resistance can indicate an open circuit or poor electrical connections, which can prevent the starter solenoid from engaging properly.

Reaction:

The ECU may limit or disable the starter solenoid function, leading to limited or no function of the engine starting system.

Recommendations:

• Inspect Relay and Wiring: Check the starter solenoid lockout relay and its wiring 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 relay circuit and identify any points of high resistance.
• Repair or Replace Faulty Wiring: Address any identified issues by repairing or replacing damaged wires, connectors, or terminals to restore proper circuit continuity.
• Test Relay Functionality: Verify that the relay activates when the ECU sends the signal. If the relay does not respond, it may be defective.
• Replace Faulty Relay: If the relay is found to be defective, replace it with a new one to ensure proper operation.
• Reset ECU and Verify Operation: After making the necessary repairs, reset the ECU to clear the error code and test the starter system to confirm that the relay operates correctly and no further errors are detected.

Note:

Maintaining proper wiring and connections for the starter solenoid lockout relay is essential for reliable engine starting. Regular inspections and timely repairs can help prevent high resistance issues.