AutoCodes – Lexus – B1477 Lexus

B1477 Lexus Code - A/C Inverter Low Voltage Power Resource System Malfunction

Quick Answer

The A/C Inverter Assembly monitors the controlling power voltage in the self circuit. Common causes include Faulty A/C Inverter (w/Converter Inverter Assembly). 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: B1477 Lexus indicates A/C Inverter Low Voltage Power Resource System Malfunction.
Common causes: Common causes include Faulty A/C Inverter (w/Converter Inverter Assembly).
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.

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Code Popularity 1,087

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 12, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1477 Lexus Description

The A/C Inverter Assembly monitors the controlling power voltage in the self circuit. It stops the compressor circuit and outputs the Diagnostic Trouble Code (DTC) when the monitored voltage is outside the specified range. The output DTC is memorized as previous trouble. The compressor control may not resume unless the power switch is turned off. The OBDII code set when an open or short to ground in the inverters controlling power voltage circuit.

OBDII Code B1477 Lexus - A/C Inverter Low Voltage Power Resource System Malfunction - AutoCodes.com — B1477 Lexus Code - A/C Inverter Low Voltage Power Resource System Malfunction

What does this mean?

What are the Possible Causes of the DTC B1477 Lexus?

Faulty A/C Inverter (w/Converter Inverter Assembly)

How to Fix the DTC B1477 Lexus?

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 B1477 Lexus 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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Need Help with the Code?

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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 B1477 Lexus Code

1. What are the common symptoms of OBDII code B1477 in a Lexus related to the A/C Inverter Low Voltage Power Resource System Malfunction?

- Common symptoms include weak or no air conditioning cooling, erratic temperature control, and inverter system malfunctions.

2. What are the possible causes of OBDII code B1477 in a Lexus related to the A/C Inverter Low Voltage Power Resource System Malfunction?

- Possible causes include a faulty inverter, damaged wiring or connectors, low voltage supply, or a malfunctioning power resource system.

3. How can I diagnose the A/C Inverter Low Voltage Power Resource System Malfunction in a Lexus with OBDII code B1477?

- Diagnose by checking the inverter operation, inspecting wiring and connectors for damage, testing the voltage supply, and scanning for related codes.

4. Can I drive my Lexus with OBDII code B1477 related to the A/C Inverter Low Voltage Power Resource System Malfunction?

- It is not recommended to drive the vehicle with this code as it can lead to further damage to the inverter system and affect the air conditioning performance.

5. What are some repair tips for fixing OBDII code B1477 in a Lexus related to the A/C Inverter Low Voltage Power Resource System Malfunction?

- Repair tips may include replacing the faulty inverter, repairing damaged wiring or connectors, ensuring proper voltage supply, and resetting the system after repairs.

6. Is it possible to reset the OBDII code B1477 related to the A/C Inverter Low Voltage Power Resource System Malfunction in a Lexus?

- Yes, the code can be reset using an OBDII scanner after the underlying issue causing the malfunction has been identified and resolved.

7. How serious is the A/C Inverter Low Voltage Power Resource System Malfunction in a Lexus with OBDII code B1477?

- This malfunction can affect the proper operation of the air conditioning system and should be addressed promptly to avoid discomfort and potential damage to the vehicle.

8. Can a DIY enthusiast fix OBDII code B1477 related to the A/C Inverter Low Voltage Power Resource System Malfunction in a Lexus?

- While some basic troubleshooting and repairs can be attempted, it is recommended to seek professional help for diagnosing and fixing complex electrical issues like this one.

9. How much does it typically cost to repair OBDII code B1477 related to the A/C Inverter Low Voltage Power Resource System Malfunction in a Lexus?

- Repair costs can vary depending on the exact cause of the issue, but expect expenses for parts and labor to range from a few hundred to over a thousand dollars.

10. What should I do if OBDII code B1477 keeps coming back in my Lexus despite repairs for the A/C Inverter Low Voltage Power Resource System Malfunction?

- If the code persists after repairs, further diagnostics may be needed to identify any underlying issues that were not initially addressed or to ensure proper repairs were made.