AutoCodes – Generic – C15C7

C15C7 Code - DC Motor Power Source Voltage Malfunction

Quick Answer

The Steering Control ECU monitors PIG (motor power source voltage) and detects a malfunction in the power supply relay (located inside the steering control ECU). Common causes include Faulty Steering Control ECU, Steering Control ECU harness is open or shorted, Steering Control 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: C15C7 indicates DC Motor Power Source Voltage Malfunction.
Common causes: Common causes include Faulty Steering Control ECU, Steering Control ECU harness is open or shorted, Steering Control 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 5,809

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 Nov 06, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C15C7 Description

The Steering Control ECU monitors PIG (motor power source voltage) and detects a malfunction in the power supply relay (located inside the steering control ECU). If the Steering Control ECU detects a malfunction, it will turn on the master warning light, store the Diagnostic Trouble Code (DTC), and stop Variable Gear Ratio Steering (VGRS) operation.

OBDII Code C15C7 - DC Motor Power Source Voltage Malfunction - AutoCodes.com — C15C7 Code - DC Motor Power Source Voltage Malfunction

What does this mean?

What are the Possible Causes of the DTC C15C7?

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

How to Fix the DTC C15C7?

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 C15C7 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 C15C7 code?

Need more information on how to fix the C15C7 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C15C7 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C15C7 Lexus — DC Motor Power Source Voltage Malfunction
C15C7 Toyota — DC Motor Power Source Voltage Malfunction

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 C15C7 Code

1. What are the common symptoms of OBDII code C15C7 (DC Motor Power Source Voltage Malfunction)?

- Common symptoms include issues with power windows, power seats, power mirrors, or other electrical components powered by the affected DC motor.

2. What are the possible causes of OBDII code C15C7?

- The code C15C7 can be triggered by issues such as a faulty DC motor, wiring problems, blown fuses, or a malfunctioning power source voltage regulator.

3. How can I diagnose the cause of OBDII code C15C7?

- To diagnose the cause, you can start by checking the wiring and connections related to the DC motor, testing the voltage output from the power source, and inspecting the motor itself for any signs of damage.

4. Can a DIY enthusiast repair OBDII code C15C7 at home?

- Depending on the underlying issue, a DIY enthusiast may be able to repair the code by replacing the faulty DC motor, repairing damaged wiring, or addressing any power source voltage irregularities.

5. Is it safe to continue driving with OBDII code C15C7 present?

- It is generally not recommended to drive with the code active, as it can lead to further electrical issues or failures of the affected components.

6. How much does it typically cost to repair OBDII code C15C7 at a professional auto repair shop?

- The cost of repairing OBDII code C15C7 can vary depending on the specific cause of the issue, but it may range from $100 to $500 or more, including parts and labor.

7. Are there any preventive measures to avoid triggering OBDII code C15C7 in the future?

- To prevent the recurrence of the code, regular inspection and maintenance of the electrical components, wiring, and power sources related to the DC motor are recommended.

8. Can a low battery voltage trigger OBDII code C15C7?

- Yes, a low battery voltage can potentially trigger the code C15C7, as it may lead to insufficient power supply to the DC motor, causing malfunctions.

9. Will resetting the OBDII system clear the code C15C7?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear once the problem is detected again.

10. How long does it typically take to repair OBDII code C15C7?

- The repair time for OBDII code C15C7 can vary based on the complexity of the issue and the availability of parts, but it may take a few hours to a full day for a professional technician to diagnose and fix the problem.