B1273 2018 Toyota RAV4 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 2018 Toyota RAV4 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.
Code B1273 2018 Toyota RAV4 Description
What are the Possible Causes of the DTC B1273 2018 Toyota RAV4?
- 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 2018 Toyota RAV4?
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 2018 Toyota RAV4 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 B1273 2018 Toyota RAV4 Code
1. What does the OBDII code B1273 indicate on a 2018 Toyota RAV4?
The B1273 code indicates a communication stop with the Sliding Roof ECU, meaning the vehicle’s main computer cannot communicate with the control unit that operates the sliding roof.
2. What are common symptoms of the B1273 code in a 2018 Toyota RAV4?
Symptoms may include the sunroof not opening or closing properly, operating erratically, or not responding to controls at all.
3. What can cause the B1273 code to appear in a 2018 Toyota RAV4?
Possible causes include a faulty Sliding Roof ECU, damaged wiring or connectors in the sunroof’s control circuit, or a malfunction in the vehicle’s main control unit.
4. How can I diagnose the B1273 code in my 2018 Toyota RAV4?
Diagnosis should start with a visual inspection of the sunroof’s wiring and connectors for any obvious damage or disconnections. Use a scan tool to check for any additional codes that could indicate related issues.
5. Is it safe to drive my 2018 Toyota RAV4 with the B1273 code active?
While the vehicle may be drivable, the functionality of the sunroof may be impaired. It is advisable to address the issue promptly to restore full functionality and avoid potential further damage.
6. What are the potential repairs for fixing the B1273 code on a 2018 Toyota RAV4?
Repairs might include replacing or repairing the Sliding Roof ECU, repairing damaged wiring or connectors, or resetting the vehicle’s main computer system.
7. How much does it typically cost to repair the B1273 code issue in a 2018 Toyota RAV4?
Costs can vary widely depending on the exact nature of the problem. Simple wiring repairs might cost a few hundred dollars, while replacing the Sliding Roof ECU could be significantly more expensive.
8. Can I fix the B1273 code myself or should I take it to a professional?
If you have experience with automotive electronics, you might manage simple repairs like checking and repairing connectors. However, more complex diagnostics and repairs are best handled by a professional technician.
9. What tools are needed to diagnose and repair the B1273 code in a 2018 Toyota RAV4?
Essential tools include a multimeter for testing electrical connections, a scan tool for diagnosing communication issues, and basic hand tools for accessing and repairing the affected components.
10. How can I prevent the B1273 code from happening in my 2018 Toyota RAV4?
Regular maintenance and inspections of the sunroof mechanism and associated wiring can help prevent issues. Ensure that the sunroof tracks are clean and lubricated, and check for signs of wear or damage in the electrical connections periodically.
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