B154A:39 Code - Driver Mirror Internal Malfunction
Quick Answer
The outside mirror switch and passenger window switch are on a serial data circuit with the memory seat module as the master. Common causes include Faulty Driver Outside Rearview Mirror Motor, Driver Outside Rearview Mirror Motor harness is open or shorted, Driver Outside Rearview Mirror 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
- B154A:39 indicates Driver Mirror Internal Malfunction.
- Common causes
- Common causes include Faulty Driver Outside Rearview Mirror Motor, Driver Outside Rearview Mirror Motor harness is open or shorted, Driver Outside Rearview Mirror 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.
Code B154A:39 Description
Mirror position is determined by both horizontal and vertical position sensors in each of the power mirrors. The outside mirror switch and passenger window switch supply a 5 V reference, low reference, and horizontal and vertical position signal circuits to these sensors. The signal circuits are referenced from 5 V by the switches and the signal circuit voltage levels represent the mirror positions. The mirror positions are sent to the memory seat module through the serial data circuit where they are stored for memory mirror operation. When the memory seat module receives a memory recall command, the memory seat module will send the go to position commands to the outside mirror switch and passenger window switch. The switches will then drive the appropriate mirror motors to the commanded position sensor settings.
The Diagnostic Trouble Code (DTC) will be set when an internal malfunction has been detected by the outside rearview mirror switch while commanding the driver outside rearview mirror UP, DOWN, LEFT, or RIGHT.
What are the Possible Causes of the DTC B154A:39?
- Faulty Driver Outside Rearview Mirror Motor
- Driver Outside Rearview Mirror Motor harness is open or shorted
- Driver Outside Rearview Mirror Motor circuit poor electrical connection
How to Fix the DTC B154A:39?
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 B154A:39 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.
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Frequently Asked Questions about B154A:39 Code
1. What are the common symptoms of OBDII code B154A:39 (Driver Mirror Internal Malfunction)?
- The common symptoms include erratic movement or failure of the driver-side mirror to adjust properly.
2. What are the possible causes of the B154A:39 code?
- The code may be triggered by a faulty driver-side mirror motor, wiring issues, or internal malfunctions within the mirror assembly.
3. How can I diagnose the Driver Mirror Internal Malfunction code?
- Diagnosing the issue involves visually inspecting the mirror for any physical damage, checking the wiring connections, and using a scan tool to retrieve the specific error codes.
1. What are common symptoms of OBDII code B154A:39 (Driver Mirror Internal Malfunction)?
- Common symptoms include erratic movement or failure of the driver-side mirror to adjust properly.
4. Can I still drive my vehicle with the B154A:39 code present?
- While you can still drive the vehicle with this code, it is recommended to address the issue promptly to ensure proper functionality of the driver-side mirror.
2. What are possible causes of the B154A:39 code?
- The code may be triggered by a faulty driver-side mirror motor, damaged mirror wiring, or a malfunction in the mirror control module.
5. What are some repair tips for fixing the Driver Mirror Internal Malfunction code?
- Repair tips may include checking and repairing any damaged wiring, replacing the mirror motor or assembly if necessary, and clearing the fault code with a scan tool after the repair.
3. How can I diagnose the cause of the Driver Mirror Internal Malfunction code?
- To diagnose the issue, check the mirror wiring for any visible damage, test the mirror motor for proper function, and scan the mirror control module for error codes.
6. Is it possible to reset the B154A:39 code without fixing the underlying issue?
- Resetting the code without addressing the root cause will likely result in the code reappearing once the system detects the same problem during operation.
7. How much does it typically cost to repair the Driver Mirror Internal Malfunction issue?
- The cost of repair can vary depending on the extent of the damage and whether you choose to replace the mirror assembly or just repair the wiring or motor components.
4. Can I still drive my vehicle with the B154A:39 code present?
- While it may be safe to drive, it is not recommended as the driver-side mirror is an important safety feature. It's best to address the issue promptly.
8. Can environmental factors like extreme temperatures trigger the B154A:39 code?
- While extreme temperatures can potentially affect the mirror's performance, the code is more likely related to internal malfunctions or wiring issues within the mirror system.
5. How can I repair the Driver Mirror Internal Malfunction code?
- Repair options include replacing the driver-side mirror motor, repairing damaged wiring, or reprogramming the mirror control module.
9. Are there any preventive measures to avoid the Driver Mirror Internal Malfunction code?
- Regularly inspecting the mirrors for any signs of damage, ensuring proper maintenance of the electrical connections, and addressing any issues promptly can help prevent this code from appearing.
6. Is it possible to reset the B154A:39 code without fixing the issue?
- Resetting the code without addressing the underlying problem may temporarily turn off the check engine light, but the issue will likely reoccur.
10. Can I fix the B154A:39 code on my own, or should I seek professional help?
- Depending on your skill level and access to tools, you may be able to address minor issues like wiring problems. However, for complex repairs or mirror assembly replacements, it is recommended to seek professional help.
7. Could extreme weather conditions cause the Driver Mirror Internal Malfunction code?
- Yes, extreme weather conditions or exposure to moisture can sometimes lead to electrical issues in the mirror system triggering this code.
8. Can a DIY enthusiast fix the B154A:39 code at home?
- Depending on your skill level and access to tools, DIY enthusiasts may be able to diagnose and repair this code at home. However, professional help is recommended for complex electrical issues.
9. Is it necessary to visit a mechanic immediately after the B154A:39 code appears?
- It is advisable to have the issue diagnosed and repaired promptly to ensure your vehicle's safety and functionality.
10. Are there any preventive measures to avoid the Driver Mirror Internal Malfunction code in the future?
- Regularly inspecting and maintaining the mirror system, avoiding physical damage, and protecting the mirrors from extreme weather conditions can help prevent this code from reoccurring.
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