B1335 – Door Ajar RR Circuit Failure

The ODBII code B1335 indicates a malfunction in the rear right door ajar circuit, suggesting that the vehicle’s system is detecting an issue with the door’s open/closed status.

The severity of ODBII code B1335 Door Ajar RR Circuit Failure is generally considered moderate.

Common Causes For: B1334 Decklid Ajar Rear Door Circuit Short To Ground

• Faulty door ajar switch
• Damaged wiring or connectors
• Short circuit in the circuit
• Corroded terminals
• Malfunctioning body control module (BCM)
• Misaligned door or latch
• Water intrusion or moisture damage

Common misdiagnosis for B1335 Door Ajar RR Circuit Failure

• Faulty door switch
• Wiring issues
• Body control module (BCM) failure
• Malfunctioning door latch
• Incorrectly installed door panel
• Grounding problems
• Faulty connectors or terminals

Common Troubleshooting Steps

The OBD-II code B1335 indicates a “Door Ajar RR Circuit Failure,” which typically refers to an issue with the rear right door’s ajar switch or its associated wiring and connectors. Here are some common troubleshooting steps to diagnose and resolve this issue:

• Visual Inspection: **Check the Door Switch: Inspect the rear right door ajar switch for any visible damage or wear. Ensure that it is not stuck or obstructed.
• **Inspect Wiring and Connectors: Look for any frayed wires, loose connections, or corrosion in the wiring harness leading to the door switch.
• Test the Door Switch: **Manual Test: Open and close the rear right door while observing the door ajar indicator on the dashboard. The indicator should turn off when the door is closed.
• **Multimeter Test: Use a multimeter to test the continuity of the door switch. Disconnect the switch and check for continuity when the switch is pressed and released.
• Check for Faulty Components: **Replace the Door Switch: If the switch is faulty, replace it with a new one.
• **Inspect the Body Control Module (BCM): If the switch is functioning correctly, the issue may lie within the BCM. Check for any fault codes related to the BCM and consider reprogramming or replacing it if necessary.
• Scan for Additional Codes: Use an OBD-II scanner to check for any additional trouble codes that may provide more context or indicate related issues.
• Check for Ground Issues: Ensure that the ground connections for the door switch and BCM are secure and free of corrosion.
• Inspect Related Systems: Check if other door ajar switches (e.g., front doors) are functioning correctly, as issues in the system can sometimes affect multiple switches.
• Clear Codes and Test Drive: After performing repairs, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns.
• Consult Service Manual: If the issue persists, consult the vehicle’s service manual for specific diagnostic procedures related to the B1335 code for your make and model.
• Seek Professional Help: If you are unable to resolve the issue after these steps, consider taking the vehicle to a qualified mechanic or dealership for further diagnosis. By following these steps, you should be able to identify and resolve the issue related to the B1335 code.