Description:

Error code ECU 001321.06 is triggered when the ECU detects low resistance in the engine starter solenoid lockout relay circuit, indicating a short to ground. This condition can prevent the starter solenoid from functioning correctly and may lead to potential electrical faults.

Reaction:

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

Recommendations:

• Inspect for Short Circuits: Check the wiring and connectors for the starter solenoid lockout relay for signs of short circuits to ground. Look for damaged insulation, frayed wires, or loose connections.
• Measure Circuit Resistance: Use diagnostic tools to measure the resistance in the relay circuit and identify the location of the short. Low resistance readings confirm a short circuit.
• Repair or Replace Damaged Wiring: Fix any identified short circuits by repairing or replacing faulty wiring, connectors, or terminals. Ensure all connections are secure and properly insulated.
• Test Relay Functionality: Verify that the relay operates correctly 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:

Proper maintenance of the starter solenoid lockout relay wiring and connections is essential to avoid short circuits and ensure reliable engine starting. Regular inspections and timely repairs can help maintain the integrity of the electrical system.