AutoCodes – Generic – B1634

B1634 Code - Mirror Driver Left Circuit Short To Ground

Quick Answer

The Body Control Module (BCM) monitors the Mirror Driver Motor. Common causes include Faulty Mirror Driver Motor, Mirror Driver Motor harness is open or shorted, Mirror Driver Motor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B1634 indicates Mirror Driver Left Circuit Short To Ground.
Common causes: Common causes include Faulty Mirror Driver Motor, Mirror Driver Motor harness is open or shorted, Mirror Driver Motor circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 11,078

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 24, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1634 Description

The Body Control Module (BCM) monitors the Mirror Driver Motor. The BCM sets the OBDII code when the Mirror Driver Motor is not to factory specifications.

OBDII Code B1634 - Mirror Driver Left Circuit Short To Ground - AutoCodes.com — B1634 Code - Mirror Driver Left Circuit Short To Ground

What does this mean?

What are the Possible Causes of the DTC B1634?

Faulty Mirror Driver Motor
Mirror Driver Motor harness is open or shorted
Mirror Driver Motor circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B1634?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1634 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B1634 code?

Need more information on how to fix the B1634 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1634 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1634 Chrysler — Left High Beam Control Circuit High
B1634 Dodge — Left High Beam Control Circuit High
B1634 Jeep — Left High Beam Control Circuit High
B1634 RAM — Left High Beam Control Circuit High

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1634 Code

1. What are the common symptoms of OBDII code B1634 (Mirror Driver Left Circuit Short To Ground)?

The common symptoms of code B1634 include malfunctioning power mirrors on the driver's side, unresponsive mirror adjustments, and mirror movement issues.

2. What are the possible causes of OBDII code B1634?

Possible causes of code B1634 include damaged wiring in the mirror circuit, a short to ground in the driver's side mirror circuit, faulty mirror adjustment switch, or a defective mirror motor.

3. How can I diagnose OBDII code B1634?

Diagnosing code B1634 involves inspecting the wiring harness for damage, testing the mirror circuit for shorts to ground using a multimeter, checking the mirror adjustment switch for proper functionality, and testing the mirror motor for proper operation.

4. Can I still drive my vehicle with OBDII code B1634?

While it may be possible to drive your vehicle with code B1634, it is recommended to address the issue promptly to ensure proper functionality of the driver's side mirror for safe driving.

5. How do I repair OBDII code B1634?

To repair code B1634, you may need to repair or replace damaged wiring in the mirror circuit, address any shorts to ground in the circuit, replace a faulty mirror adjustment switch, or install a new mirror motor if necessary.

6. Is OBDII code B1634 easy to fix on my own?

Fixing code B1634 may require basic knowledge of automotive electrical systems and wiring. If you are comfortable with these tasks, you may be able to address the issue on your own, but professional assistance is recommended for complex repairs.

7. Can a faulty mirror motor cause OBDII code B1634?

Yes, a faulty mirror motor on the driver's side can cause code B1634 if it is shorted to ground or experiencing other electrical issues that trigger the diagnostic trouble code.

8. Will resetting the OBDII system clear code B1634?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing code B1634 is not addressed, the code is likely to reappear after driving cycles.

9. Are there any safety concerns associated with OBDII code B1634?

Code B1634 may impact your ability to adjust the driver's side mirror properly, affecting visibility while driving. It is essential to address this code to maintain safe driving conditions.

10. How can I prevent OBDII code B1634 from occurring in the future?

To prevent code B1634, perform regular maintenance checks on your vehicle's electrical systems, avoid water damage to the mirrors and wiring, and address any mirror-related issues promptly to prevent further damage to the circuit.