AutoCodes – Toyota – B1206 Toyota

B1206 Toyota Code - Power Window Master Switch Communication Stop

Quick Answer

This Diagnostic Trouble Code (DTC) is stored when Local Interconnect Network (LIN) communication between the power window regulator master switch assembly and main body ECU (instrument panel junction block assembly) stops for more than 10 seconds. Common causes include Faulty Power Window Master Switch, Power Window Master Switch harness is open or shorted, Power Window Master Switch circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B1206 Toyota indicates Power Window Master Switch Communication Stop.
Common causes: Common causes include Faulty Power Window Master Switch, Power Window Master Switch harness is open or shorted, Power Window Master Switch circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 21,667

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 19, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1206 Toyota Description

This Diagnostic Trouble Code (DTC) is stored when Local Interconnect Network (LIN) communication between the power window regulator master switch assembly and main body ECU (instrument panel junction block assembly) stops for more than 10 seconds. The DTC will set when there is no communication between the power window regulator master switch assembly and the main body ECU (instrument panel junction block assembly) for more than 10 seconds.

OBDII Code B1206 Toyota - Power Window Master Switch Communication Stop - AutoCodes.com — B1206 Toyota Code - Power Window Master Switch Communication Stop

What does this mean?

What are the Possible Causes of the DTC B1206 Toyota?

Faulty Power Window Master Switch
Power Window Master Switch harness is open or shorted
Power Window Master Switch circuit poor electrical connection

How to Fix the DTC B1206 Toyota?

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 B1206 Toyota 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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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 B1206 Toyota Code

1. What are the common symptoms of OBDII code B1206 in a Toyota related to the Power Window Master Switch Communication Stop?

- Common symptoms include non-functioning power windows, inability to control power windows from the driver's side, and illuminated dashboard warning lights related to the power window system.

2. What are some possible causes of the OBDII code B1206 in a Toyota indicating a Power Window Master Switch Communication Stop issue?

- Possible causes include a faulty power window master switch, damaged wiring or connectors in the power window system, malfunctioning control modules, or a communication breakdown between components.

3. How can I diagnose the OBDII code B1206 in a Toyota for a Power Window Master Switch Communication Stop problem?

- Diagnosis typically involves using a compatible OBDII scanner to retrieve the specific code, checking the power window master switch for proper functionality, inspecting wiring and connectors for damage, and testing communication between control modules.

4. Is it safe to continue driving with the OBDII code B1206 indicating a Power Window Master Switch Communication Stop issue in a Toyota?

- It is generally not recommended to continue driving with this issue, as malfunctioning power windows can pose safety concerns, such as being unable to open or close windows in emergency situations.

5. What are some repair tips for addressing the OBDII code B1206 related to the Power Window Master Switch Communication Stop in a Toyota?

- Repair tips may include replacing the power window master switch if faulty, repairing damaged wiring or connectors, resetting control modules, and ensuring proper communication between components through diagnostic procedures.

6. Can I fix the OBDII code B1206 in a Toyota indicating a Power Window Master Switch Communication Stop issue myself?

- Depending on your level of automotive expertise, you may be able to address simpler causes such as checking fuses or connectors. However, complex issues like control module malfunctions may require professional diagnosis and repair.

7. How much does it typically cost to repair the OBDII code B1206 for a Power Window Master Switch Communication Stop problem in a Toyota?

- The cost of repair can vary depending on the specific cause of the issue, parts needed for replacement, labor rates, and whether the repair is done at a dealership or an independent repair shop. It is recommended to obtain a few quotes for comparison.

8. Will resetting the OBDII code B1206 in a Toyota resolve the Power Window Master Switch Communication Stop issue?

- Resetting the code may temporarily clear the warning light, but it will not address the underlying issue causing the Power Window Master Switch Communication Stop problem. Proper diagnosis and repair are necessary for a permanent solution.

9. Are there any recalls or technical service bulletins related to the OBDII code B1206 in Toyota vehicles for Power Window Master Switch Communication Stop issues?

- It's recommended to check with Toyota dealership or official sources for any recalls or technical service bulletins specific to your vehicle model and year related to this OBDII code and power window system communication problems.

10. How can regular maintenance help prevent OBDII code B1206 occurrences related to the Power Window Master Switch Communication Stop in a Toyota?

- Regular maintenance, such as inspecting and keeping the power window system components clean, checking for signs of wear or damage, and addressing any issues promptly can help prevent the occurrence of OBDII code B1206 and ensure the proper functioning of the power windows.