b1402 driver power window down switch circuit failure
B1402 Driver Power Window Down Switch Circuit Failure
OBD2 Code: B1402
Description: Driver power window down switch circuit failure.
Definition: The OBD-II code B1402 indicates a malfunction in the driver power window down switch circuit. This means there is an issue with the electrical circuit responsible for controlling the downward movement of the driver’s side power window, which could be due to a faulty switch, wiring problems, or a malfunctioning motor.
b1402 – Driver Power Window Down Switch Circuit Failure
Severity: Moderate
Common Causes
b1402 – Driver Power Window Down Switch Circuit Failure
Common Causes:
- Faulty driver power window down switch
- Short circuit in the wiring harness
- Loose or corroded electrical connections
- Defective power window control module
Common Misdiagnosis
OBD2 Code: B1402
Description: Driver Power Window Down Switch Circuit Failure
Common Misdiagnosis: Replacing the power window switch without checking for wiring issues or a faulty window motor.
Common Diagnostic Steps
OBD2 Code: B1402
Description: Driver Power Window Down Switch Circuit Failure
Common Diagnostic Steps:
- Check the power window switch for proper operation and continuity.
- Inspect the wiring harness and connectors for damage, corrosion, or loose connections.
- Test the driver power window motor for functionality.
- Examine the fuse related to the power window circuit and replace if necessary.
- Use a scan tool to check for any additional trouble codes that may indicate related issues.
- If equipped, verify that the vehicle’s battery voltage is within specification.
- Consult the vehicle’s service manual for specific troubleshooting procedures related to this code.