AutoCodes – Toyota – C1582 Toyota

C1582 Toyota Code - Assist Map Number Mismatch

Quick Answer

When an incorrect ECM, an incorrect brake actuator assembly or an incorrect main body ECU is installed after the assist map has been written in the power steering ECU assembly, then Diagnostic Trouble Code (DTC) C1582/26 is stored because the data does not match the vehicle specifications. Common causes include Incorrect Engine Control Module (ECM), Incorrect Skid Control ECU (Brake Actuator Assembly), Incorrect Main Body ECU (Multiplex Network Body ECU). 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: C1582 Toyota indicates Assist Map Number Mismatch.
Common causes: Common causes include Incorrect Engine Control Module (ECM), Incorrect Skid Control ECU (Brake Actuator Assembly), Incorrect Main Body ECU (Multiplex Network Body ECU).
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 3,652

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 Feb 26, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1582 Toyota Description

OBDII Code C1582 Toyota - Assist Map Number Mismatch - AutoCodes.com — C1582 Toyota Code - Assist Map Number Mismatch

What does this mean?

What are the Possible Causes of the DTC C1582 Toyota?

Incorrect Engine Control Module (ECM)
Incorrect Skid Control ECU (Brake Actuator Assembly)
Incorrect Main Body ECU (Multiplex Network Body ECU)
Faulty Power Steering ECU

How to Fix the DTC C1582 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 C1582 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.

Need more information about the C1582 Toyota code?

Need more information on how to fix the C1582 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1582 Toyota code diagnosed by a professional: Find a repair shop in your area

Information for Specific Toyota Models

C1582 2013 Toyota RAV4 — Assist Map Number Mismatch
C1582 2014 Toyota RAV4 — Assist Map Number Mismatch
C1582 2015 Toyota RAV4 — Assist Map Number Mismatch
C1582 2016 Toyota RAV4 — Assist Map Number Mismatch
C1582 2017 Toyota RAV4 — Assist Map Number Mismatch
C1582 2018 Toyota RAV4 — Assist Map Number Mismatch

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 C1582 Toyota Code

1. What are the common symptoms of OBDII code C1582 Toyota (Assist Map Number Mismatch)?

The common symptoms include rough idling, reduced engine performance, and the illumination of the check engine light.

2. What can cause the OBDII code C1582 Toyota to appear?

The code C1582 typically appears due to a mismatch between the assist map number and the actual assist map in the vehicle's system.

3. How serious is the OBDII code C1582 Toyota?

While the code may not cause immediate harm to the vehicle, it can lead to poor engine performance and should be addressed promptly to avoid potential long-term issues.

4. How can I diagnose the OBDII code C1582 Toyota?

Diagnosis of code C1582 involves using an OBDII scanner to read the code, followed by checking the vehicle's system for any assist map number mismatches.

5. Can I still drive my vehicle with the OBDII code C1582 Toyota?

It is generally not recommended to drive the vehicle with the code C1582 present, as it may lead to further engine complications if left unaddressed.

6. What are some DIY repair tips for the OBDII code C1582 Toyota?

DIY repair tips include checking and resetting the code using an OBDII scanner, ensuring the assist map number matches the actual assist map, and consulting a repair manual for specific instructions.

7. How much does it typically cost to fix the OBDII code C1582 Toyota?

The cost of fixing the code C1582 can vary depending on the cause of the issue and whether you choose to repair it yourself or seek professional help. It may range from a simple reset to potentially replacing components.

8. Can the OBDII code C1582 Toyota be a recurring issue?

If the root cause of the code C1582 is not properly addressed, it can potentially reappear in the future. Proper diagnosis and repair are essential to prevent recurring issues.

9. How long does it take to fix the OBDII code C1582 Toyota?

The repair time for the code C1582 can vary based on the complexity of the issue and the repair method chosen. It could take anywhere from a few minutes to a few hours.

10. Is it necessary to clear the OBDII code C1582 Toyota after fixing the issue?

Yes, it is recommended to clear the code using an OBDII scanner after addressing the assist map number mismatch to ensure the system recognizes the repair and resets the check engine light.