Description:

Error code ECU 001321.16 is triggered when the ECU detects that the starter has been engaged for too long, indicating potential issues such as low resistance in the starter solenoid lockout relay drive circuit or a stuck starter solenoid.

Reaction:

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

Recommendations:

• Inspect Starter System: Check the starter solenoid and its wiring for signs of damage, corrosion, or loose connections that could cause prolonged engagement.
• Measure Circuit Resistance: Use a multimeter to measure the resistance in the starter solenoid circuit to identify any points of low resistance or shorts.
• Check for Stuck Solenoid: Ensure that the starter solenoid is not stuck in the engaged position. Manually test the solenoid if necessary.
• Repair or Replace Faulty Components: Address any identified issues by repairing or replacing damaged wires, connectors, or the solenoid itself.
• Test Starter Functionality: Verify that the starter engages and disengages correctly without prolonged engagement.
• 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 it operates correctly and no further errors are detected.

Note:

Maintaining proper operation of the starter solenoid and its circuit is crucial for reliable engine starting. Regular inspections and timely repairs can help prevent issues related to prolonged starter engagement.