AutoCodes – Scion – C1582 Scion

C1582 Scion 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 Scion 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 250

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Feb 26, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
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Code C1582 Scion Description

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

What does this mean?

What are the Possible Causes of the DTC C1582 Scion?

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 Scion?

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 Scion 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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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.