B1422 – Power Window RR Motor Circuit Failure

The ODBII code B1422 indicates a failure in the power window motor circuit for the right rear window, suggesting a malfunction in the motor or its associated wiring and connections.

The severity of ODBII code B1422 is generally considered moderate.

Common Causes For: B1421 Passenger Power Window Motor Circuit Short To Ground

• Faulty power window motor
• Damaged wiring or connectors
• Blown fuse
• Faulty window switch
• Short circuit in the circuit
• Corroded connections
• Malfunctioning body control module (BCM)

Common misdiagnosis for B1422 Power Window RR Motor Circuit Failure

• Faulty power window switch
• Wiring issues or shorts in the harness
• Defective window regulator
• Battery or charging system problems
• Body control module (BCM) failure
• Faulty relay or fuse
• Incorrectly diagnosed motor issues

Common Troubleshooting Steps

The OBD-II code B1422 indicates a “Power Window RR Motor Circuit Failure,” which typically refers to an issue with the rear right power window motor or its associated circuitry. Here are some common troubleshooting steps to diagnose and potentially resolve this issue:

• Visual Inspection: **Check Wiring and Connectors: Inspect the wiring harness and connectors leading to the rear right power window motor for any signs of damage, corrosion, or loose connections.
• **Look for Obstructions: Ensure that there are no physical obstructions in the window track that could prevent the window from operating.
• Check the Power Window Switch: **Test the Switch: Use a multimeter to test the power window switch for continuity. If the switch is faulty, it may not send the correct signal to the motor.
• **Bypass the Switch: If possible, bypass the switch to see if the motor operates directly. This can help determine if the switch is the issue.
• Test the Power Window Motor: **Direct Power Test: Apply direct power to the motor using a known good power source to see if the motor operates. If it does not, the motor may be faulty and need replacement.
• **Check Ground Connection: Ensure that the ground connection for the motor is secure and free of corrosion.
• Inspect the Circuit: **Check Fuses: Inspect the fuse related to the power window circuit. Replace any blown fuses.
• **Test Voltage: Use a multimeter to check for voltage at the motor connector when the switch is activated. If there is no voltage, trace the circuit back to find the issue.
• Scan for Additional Codes: **Check for Other 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: **Ground Points: Ensure that all ground points related to the power window system are clean and secure. Poor grounding can lead to circuit failures.
• Inspect the Body Control Module (BCM): **BCM Functionality: If all other components check out, the issue may lie within the Body Control Module. Check for any software updates or faults in the BCM.
• Consult Wiring Diagrams: **Refer to Service Manual: Use the vehicle’s service manual to refer to wiring diagrams for the power window system. This can help identify any potential issues in the circuit.
• Professional Diagnosis: If the issue persists after performing these steps, consider seeking help from a professional mechanic or automotive technician who can perform more advanced diagnostics.Conclusion By following these troubleshooting steps, you should be able to identify the cause of the B1422 code and take appropriate action to resolve the issue with the rear right power window motor circuit.