This guide provides step-by-step instructions for diagnosing and resolving the P0615-13 fault code related to a starter relay open circuit in JCB excavators.
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Possible Causes:
- Faulty starter relay
- Starter relay not properly connected to the machine
- Damaged or faulty wire harness
- Terminal backed out from the starter relay base
- Terminal backed out from the MECU (Machine Electronic Control Unit) wire harness connector
Diagnostic Steps:
- Measure Starter Relay Coil Resistance
- Use a multimeter to check the resistance of the starter relay coil.
- The resistance should be approximately 220 ohms.
- Verify Starter Relay Connection
- Ensure the starter relay is securely connected to the relay box. Refer to the image below for reference.
- Ensure the starter relay is securely connected to the relay box. Refer to the image below for reference.
- Inspect MECU Connector Wiring
- Check the connectivity between wire no. 8065 and wire no. 8067 at the MECU wire harness connector.
- Look for terminal back-out or disconnection. Refer to the image below for guidance.
- Inspect Relay Base Wiring
- Check the continuity between wire no. 8065 and wire no. 8067 at the starter relay base (Relay Box).
- Verify if terminals have backed out. See the photograph for clarification.
Corrective Actions:
- Replace the Starter Relay
- If the relay is faulty, install a new one with the correct specifications.
- Repair or Replace the Wire Harness
- If there’s an open circuit or terminal back-out in the wire harness, repair the damaged section or replace the entire harness as needed.
Following these steps should resolve the P0615-13 fault code and restore normal starting operation for your JCB excavator.
More topics for JCB machine,please refer to:JCB Machine Trouble Repair.