AutoCodesToyota – C1521 2017 Toyota RAV4

C1521 2017 Toyota RAV4 Code - Power Steering Short in Motor Circuit

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
C1521 2017 Toyota RAV4 indicates Power Steering Short in Motor Circuit.
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 238
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jan 31, 2023
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Code C1521 2017 Toyota RAV4 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 C1521 2017 Toyota RAV4 - Power Steering Short in Motor Circuit - AutoCodes.com
C1521 2017 Toyota RAV4 Code - Power Steering Short in Motor Circuit

What are the Possible Causes of the DTC C1521 2017 Toyota RAV4?

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

How to Fix the DTC C1521 2017 Toyota RAV4?

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 C1521 2017 Toyota RAV4 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 C1521 2017 Toyota RAV4 code?

Need more information on how to fix the C1521 2017 Toyota RAV4 code? Get Access to Factory Service Manuals

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 C1521 2017 Toyota RAV4 Code

1. What does the OBDII code C1521 mean on a 2017 Toyota RAV4?

C1521 indicates a "Power Steering Short in Motor Circuit," meaning there is an electrical issue in the power steering motor circuit.

2. What are the symptoms of the C1521 code in a Toyota RAV4?

Common symptoms include the power steering warning light turning on, heavy or stiff steering, and reduced or complete loss of power steering assist.

3. What causes the C1521 code to appear in a 2017 Toyota RAV4?

The code is usually caused by a short circuit, damaged wiring, a faulty power steering motor, or a malfunctioning power steering ECU.

4. Can I still drive my 2017 Toyota RAV4 with the C1521 code?

While the vehicle is drivable, steering will be more difficult, especially at low speeds, posing a safety risk. It's best to address the issue promptly.

5. How is the C1521 code diagnosed in a Toyota RAV4?

A technician will inspect the power steering motor circuit, check wiring and connectors for damage, and use a diagnostic tool to confirm the fault.

6. How do you fix the C1521 code in a 2017 Toyota RAV4?

Potential repairs include replacing damaged wiring, repairing connectors, replacing the power steering motor, or addressing a faulty ECU if needed.

7. Is the power steering motor likely to fail completely with the C1521 code?

It’s possible. If the issue is not addressed, the motor may stop functioning, leading to a complete loss of power steering assist.

8. How much does it cost to repair the C1521 code on a Toyota RAV4?

Repair costs vary depending on the issue, but replacing a power steering motor can cost between $500 and $1,000, excluding diagnostics.

9. Can I reset the C1521 code without fixing the problem?

While the code can be cleared temporarily, it will likely return unless the underlying issue is resolved.

10. What tools are needed to diagnose the C1521 code?

A professional-grade OBDII scanner, a multimeter for checking continuity, and a wiring diagram for the power steering system are essential.

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