OBD-II DTC B1638 – Mirror Driver Right Short To Ground
DTC B1638 meaning
DTC B1638 refers to a diagnostic trouble code indicating a “Mirror Driver Right Short To Ground.” This code is generated when the vehicle’s onboard diagnostic system detects a short circuit in the right side mirror’s driver circuit, which can affect the functionality of the mirror’s adjustments and features.
DTC B1638 symptoms
Common symptoms associated with DTC B1638 may include:
- Inoperable right side mirror adjustments
- Right side mirror heating feature not functioning
- Warning lights on the dashboard related to mirror functions
- Possible issues with other electrical components in the vicinity
DTC B1638 causes
The causes of DTC B1638 can include:
- Damaged wiring or connectors in the mirror circuit
- Faulty mirror motor or internal components
- Corrosion or moisture ingress in the electrical connections
- Aftermarket modifications or installations affecting the circuit
DTC B1638 seriousness
DTC B1638 is considered a moderate issue. While it may not affect the vehicle’s overall drivability, it can compromise safety by limiting visibility through the right side mirror. Addressing this code promptly is advisable to ensure all mirror functions operate correctly.
How to diagnose DTC B1638
To diagnose DTC B1638, follow these steps:
- Use an OBD-II scanner to confirm the presence of the code.
- Inspect the wiring and connectors leading to the right side mirror for damage or corrosion.
- Check the mirror motor for proper operation.
- Test for continuity in the mirror circuit to identify any shorts to ground.
- Review any related codes that may provide additional context.
How to fix DTC B1638 step-by-step instructions
To fix DTC B1638, follow these steps:
- Disconnect the vehicle’s battery to ensure safety.
- Inspect and repair any damaged wiring or connectors in the mirror circuit.
- Replace the mirror motor if it is found to be faulty.
- Clean any corrosion from electrical connections and ensure a secure fit.
- Reconnect the battery and clear the DTC using an OBD-II scanner.
- Test the right side mirror functions to ensure proper operation.
How to erase DTC B1638
To erase DTC B1638, follow these steps:
- Connect an OBD-II scanner to the vehicle’s diagnostic port.
- Access the trouble codes menu on the scanner.
- Select the option to clear or erase codes.
- Confirm the action and wait for the scanner to complete the process.
- Disconnect the scanner and perform a test drive to ensure the code does not reappear.
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