AutoCodes – Generic – B1273

B1273 Code - Sliding Roof ECU Communication Stop

Quick Answer

This Diagnostic Trouble Code (DTC) is stored when Local Interconnect Network (LIN) communication between the sliding roof drive gear sub-assembly and Main Body ECU (Multiplex Network Body ECU) stops for 10 seconds or more. Common causes include Faulty Sliding roof drive gear sub-assembly, Faulty Main Body ECU (Multiplex Network Body ECU), Main Body ECU harness is open or shorted. 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: B1273 indicates Sliding Roof ECU Communication Stop.
Common causes: Common causes include Faulty Sliding roof drive gear sub-assembly, Faulty Main Body ECU (Multiplex Network Body ECU), Main Body ECU harness is open or shorted.
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 16,517

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 29, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1273 Description

OBDII Code B1273 - Sliding Roof ECU Communication Stop - AutoCodes.com — B1273 Code - Sliding Roof ECU Communication Stop

What does this mean?

What are the Possible Causes of the DTC B1273?

Faulty Sliding roof drive gear sub-assembly
Faulty Main Body ECU (Multiplex Network Body ECU)
Main Body ECU harness is open or shorted
Main Body ECU circuit poor electrical connection

How to Fix the DTC B1273?

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 B1273 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 B1273 code?

Need more information on how to fix the B1273 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1273 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1273 Lexus — Sliding Roof ECU Communication Stop
B1273 Scion — Sliding Roof ECU Communication Stop
B1273 Toyota — Sliding Roof ECU Communication Stop

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 B1273 Code

1. What are the common symptoms of OBDII code B1273 (Sliding Roof ECU Communication Stop)?

- Common symptoms include the sliding roof not operating properly, the roof getting stuck in one position, or the roof not responding to commands.

2. What can cause the OBDII code B1273 (Sliding Roof ECU Communication Stop) to trigger?

- This code can be triggered by wiring issues, a faulty sliding roof ECU, poor connections, or a malfunction in the communication network.

3. How can I diagnose the OBDII code B1273 (Sliding Roof ECU Communication Stop)?

- Diagnosing this code typically involves checking the wiring harness for damage, testing the connections to the sliding roof ECU, and using a scan tool to communicate with the ECU.

4. What are some repair tips for fixing OBDII code B1273 (Sliding Roof ECU Communication Stop)?

- Repair tips may include repairing or replacing damaged wiring, ensuring proper connections, resetting the sliding roof ECU, or replacing the ECU if it's found to be faulty.

5. Can I drive my vehicle with the OBDII code B1273 (Sliding Roof ECU Communication Stop) present?

- It is generally safe to drive the vehicle with this code, but it's important to address the issue promptly to ensure the sliding roof functions correctly.

6. Is it possible to reset the OBDII code B1273 (Sliding Roof ECU Communication Stop) without repairs?

- While clearing the code may temporarily remove the warning light, it's essential to diagnose and fix the underlying issue to prevent the code from reappearing.

7. How much does it typically cost to repair OBDII code B1273 (Sliding Roof ECU Communication Stop)?

- The cost of repair can vary depending on the exact cause of the issue, but it may involve a few hundred dollars for parts and labor.

8. Can extreme weather conditions cause OBDII code B1273 (Sliding Roof ECU Communication Stop) to trigger?

- Yes, extreme weather conditions like heavy rain, snow, or extreme temperatures can sometimes lead to issues with the sliding roof ECU communication.

9. Are there any preventive measures I can take to avoid OBDII code B1273 (Sliding Roof ECU Communication Stop)?

- Regularly inspecting the sliding roof system, keeping it clean and well-maintained, and addressing any wiring issues promptly can help prevent this code from occurring.

10. Will fixing OBDII code B1273 (Sliding Roof ECU Communication Stop) improve the overall performance of my vehicle?

- Fixing this code will primarily ensure that the sliding roof system operates correctly and smoothly, contributing to the overall functionality and convenience of the vehicle.