AutoCodes – Scion – C1534 Scion

C1534 Scion Code - Power Steering EEPROM Malfunction

Quick Answer

The Power Steering ECU monitors itself for proper operation. Common causes include Faulty Power Steering ECU, Power Steering ECU harness is open or shorted, Power Steering ECU circuit poor electrical connection. 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: C1534 Scion indicates Power Steering EEPROM Malfunction.
Common causes: Common causes include Faulty Power Steering ECU, Power Steering ECU harness is open or shorted, Power Steering ECU circuit poor electrical connection.
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 847

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 Jan 31, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1534 Scion Description

The Power Steering ECU monitors itself for proper operation. The Power Steering ECU sets the Diagnostic Trouble Code (DTC) when it detects an internal malfunction. If the Power Steering ECU Assembly stores this DTC, it will shut off the motor relay circuit (built into the Power Steering ECU Assembly) and stop power assist. However, power assist continues if this DTC is output.

OBDII Code C1534 Scion - Power Steering EEPROM Malfunction - AutoCodes.com — C1534 Scion Code - Power Steering EEPROM Malfunction

What does this mean?

What are the Possible Causes of the DTC C1534 Scion?

Faulty Power Steering ECU
Power Steering ECU harness is open or shorted
Power Steering ECU circuit poor electrical connection

How to Fix the DTC C1534 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 C1534 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.

Frequently Asked Questions about C1534 Scion Code

1. What does the OBDII code C1534 mean on a Scion?

C1534 indicates a Power Steering EEPROM Malfunction, meaning there is an issue with the memory chip in the power steering control module.

2. What are the symptoms of code C1534 in a Scion?

Common symptoms include heavy or unresponsive steering, the power steering warning light illuminating, and intermittent loss of power steering assist.

3. What causes the C1534 code to appear?

The code is typically caused by a corrupted EEPROM in the power steering control module, electrical issues like a poor connection or damaged wiring, or internal module failure.

4. Can I still drive my Scion with a C1534 code?

Yes, but the steering may be harder to control, especially at lower speeds, which can make driving unsafe. Prompt diagnosis and repair are recommended.

5. How do you diagnose the C1534 code?

A mechanic will use a scan tool to confirm the code, inspect the power steering control module wiring and connections, and test the module's functionality.

6. Is replacing the power steering control module required to fix C1534?

Not always. Sometimes repairing or reprogramming the EEPROM can resolve the issue, but in cases of severe damage, module replacement may be necessary.

7. Can a disconnected battery cause the C1534 code?

A disconnected or weak battery can sometimes lead to electrical glitches, but it is unlikely to permanently corrupt the EEPROM. The root cause should still be inspected.

8. How much does it cost to fix a C1534 code on a Scion?

Repair costs vary. Reprogramming the EEPROM may cost $100â€“$200, while replacing the power steering control module could cost $500â€“$1000, including parts and labor.

9. Can I clear the C1534 code to fix the issue?

Clearing the code with a scan tool will remove it temporarily, but it will likely return if the underlying issue with the EEPROM or module is not resolved.

10. What tools are needed to repair the C1534 code?

A professional scan tool, multimeter for electrical testing, and possibly a programming device for reprogramming or resetting the EEPROM are required.