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Engine-Codes – Toyota – B1473 Toyota

B1473 Toyota Code - A/C Inverter Start-Up Signal System Malfunction

Quick Answer

The B1473 diagnostic trouble code (DTC) for Toyota vehicles indicates a malfunction in the A/C Inverter Start-Up Signal System. Common causes include Faulty wiring or connectors in the A/C Inverter Start-Up Signal System, Malfunctioning A/C inverter, Issues with the A/C compressor or related components. 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
B1473 Toyota indicates A/C Inverter Start-Up Signal System Malfunction.
Common causes
Common causes include Faulty wiring or connectors in the A/C Inverter Start-Up Signal System, Malfunctioning A/C inverter, Issues with the A/C compressor or related components.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code B1473 Toyota Description

The B1473 diagnostic trouble code (DTC) for Toyota vehicles indicates a malfunction in the A/C Inverter Start-Up Signal System. This system is responsible for controlling the operation of the air conditioning inverter, which is a critical component of the vehicle's air conditioning system. The inverter is tasked with converting the direct current (DC) power from the vehicle's battery into alternating current (AC) power that is used to operate the air conditioning compressor.

OBDII Code B1473 Toyota - A/C Inverter Start-Up Signal System Malfunction
B1473 Toyota Code - A/C Inverter Start-Up Signal System Malfunction

Common Causes of B1473 Toyota

  1. Faulty wiring or connectors in the A/C Inverter Start-Up Signal System.
  2. Malfunctioning A/C inverter.
  3. Issues with the A/C compressor or related components.
  4. Electrical problems in the A/C system.
  5. Software or programming issues in the vehicle's control module.

Symptoms of B1473 Toyota

  1. Ineffective cooling or lack of cold air from the A/C system.
  2. A/C system not turning on or intermittent operation.
  3. Strange noises coming from the A/C system.
  4. Dashboard warning light related to the A/C system.

How to Fix B1473 Toyota

  1. Begin by conducting a thorough inspection of the A/C Inverter Start-Up Signal System, checking for any visible damage or loose connections.
  2. Use a multimeter to test the continuity of the wiring and connectors to identify any faults.
  3. Test the A/C inverter for proper operation and diagnose any malfunctions.
  4. If necessary, replace any damaged wiring, connectors, or components in the A/C system.
  5. Clear the DTC and reset the vehicle's control module to ensure proper operation of the A/C system.

Cost to Fix B1473 Toyota

The cost of repairing a malfunction in the A/C Inverter Start-Up Signal System can vary depending on the specific issue and the extent of the repair needed. In general, the parts and labor for this repair could range from $200 to $500. However, it's important to note that labor rates at auto repair shops can vary significantly based on location and other factors. It's recommended to obtain quotes from multiple shops to get a more accurate estimate.

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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 B1473 Toyota Code

1. What are the common symptoms of OBDII code B1473 in a Toyota related to the A/C Inverter Start-Up Signal System Malfunction?

- Common symptoms include the air conditioning system not starting up properly, lack of cold air from the vents, and potential issues with the inverter system.

2. What can cause the OBDII code B1473 to trigger in a Toyota's A/C Inverter Start-Up Signal System?

- The code may be triggered by a malfunction in the A/C inverter start-up signal system, a faulty inverter assembly, wiring issues, or a communication error between components.

3. How can I diagnose the A/C Inverter Start-Up Signal System Malfunction in my Toyota if I suspect OBDII code B1473?

- Diagnosis typically involves using a scan tool to retrieve the specific trouble code, checking the inverter assembly for proper function, inspecting wiring connections, and testing related components for faults.

4. Is it safe to continue driving my Toyota with the OBDII code B1473 related to the A/C Inverter Start-Up Signal System Malfunction?

- It is generally not recommended to drive the vehicle with this code active, as it can affect the performance of the air conditioning system and lead to further issues if left unresolved.

5. Can I reset the OBDII code B1473 in my Toyota related to the A/C Inverter Start-Up Signal System Malfunction?

- While you can clear the code using a scan tool, it is important to address the underlying issue causing the code to prevent it from reoccurring.

6. What are some repair tips for fixing the A/C Inverter Start-Up Signal System Malfunction in a Toyota with OBDII code B1473?

- Repair tips may include checking and repairing wiring connections, replacing a faulty inverter assembly, ensuring proper communication between system components, and clearing the trouble code after resolving the issue.

7. How much does it typically cost to repair the A/C Inverter Start-Up Signal System Malfunction related to OBDII code B1473 in a Toyota?

- Repair costs can vary depending on the exact cause of the issue, but they may range from a couple of hundred dollars for simpler fixes to over a thousand dollars for more complex repairs involving component replacement.

8. Can a DIY enthusiast fix the A/C Inverter Start-Up Signal System Malfunction in a Toyota triggering OBDII code B1473?

- While some simple checks and repairs like checking wiring connections can be done by a knowledgeable DIY enthusiast, diagnosing and fixing more complex issues may require professional expertise and specialized tools.

9. Are there any recalls or technical service bulletins related to the A/C Inverter Start-Up Signal System Malfunction in Toyota vehicles with OBDII code B1473?

- It's advisable to check with Toyota dealerships or visit the National Highway Traffic Safety Administration (NHTSA) website to see if there are any recalls or bulletins related to this specific issue in your vehicle.

10. How can regular maintenance help prevent the occurrence of OBDII code B1473 in a Toyota due to the A/C Inverter Start-Up Signal System Malfunction?

- Regular maintenance, including keeping the A/C system clean, checking for any unusual noises or smells, and addressing any issues promptly, can help prevent more significant problems that may trigger this trouble code.

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