AutoCodes – Toyota – C2318 Toyota

C2318 Toyota Code - Low Voltage Error Power Supply Malfunction

Quick Answer

The Auxiliary Battery voltage is applied to terminal +B when the power switch is on (IG). Common causes include Faulty Auxiliary Battery, HEV Fuse, IGCT Relay. 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: C2318 Toyota indicates Low Voltage Error Power Supply Malfunction.
Common causes: Common causes include Faulty Auxiliary Battery, HEV Fuse, IGCT Relay.
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 15,904

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C2318 Toyota Description

The Auxiliary Battery voltage is applied to terminal +B when the power switch is on (IG). The Transmission Control ECU outputs this Diagnostic Trouble Code (DTC) when the input voltage drops

OBDII Code C2318 Toyota - Low Voltage Error Power Supply Malfunction - AutoCodes.com — C2318 Toyota Code - Low Voltage Error Power Supply Malfunction

What does this mean?

What are the Possible Causes of the DTC C2318 Toyota?

Faulty Auxiliary Battery
HEV Fuse
IGCT Relay
Auxiliary Battery harness is open or shorted
Auxiliary Battery circuit poor electrical connection

How to Fix the DTC C2318 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 C2318 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 C2318 Toyota code?

Need more information on how to fix the C2318 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C2318 Toyota code diagnosed by a professional: Find a repair shop in your area

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 C2318 Toyota Code

1. What are common symptoms of OBDII code C2318 in a Toyota vehicle?

- Common symptoms include issues with the power steering system, EPS warning light illuminated on the dashboard, and difficulty steering.

2. What does the OBDII code C2318 indicate in a Toyota?

- The code C2318 indicates a low voltage error related to power supply malfunction in the electronic power steering system.

3. What are possible causes of the C2318 code in a Toyota?

- Possible causes include a faulty power steering control module, damaged wiring or connectors, low battery voltage, or a failing power steering motor.

4. How can I diagnose the C2318 code in my Toyota?

- Diagnosing the C2318 code typically involves using a compatible OBDII scanner to read the code and check for any related issues in the power steering system components.

5. Can I continue driving my Toyota with the C2318 code present?

- It is not recommended to drive the vehicle with the C2318 code present, as it can lead to potential safety hazards due to compromised power steering functionality.

6. How can I repair the C2318 code in my Toyota?

- Repairing the C2318 code may involve inspecting and repairing any damaged wiring, replacing the power steering control module, or addressing any other underlying issues causing the power supply malfunction.

7. Is it possible to reset the C2318 code in a Toyota without fixing the underlying issue?

- While it is possible to clear the code temporarily, it is crucial to address the root cause of the power supply malfunction to prevent the code from reoccurring.

8. How much does it typically cost to repair the C2318 code in a Toyota?

- The cost of repairing the C2318 code can vary depending on the specific issue causing the power supply malfunction, but it may involve parts and labor expenses ranging from $200 to $800 or more.

9. Are there any preventive maintenance tips to avoid the C2318 code in a Toyota?

- Regularly checking the power steering system components, maintaining the vehicle's battery health, and addressing any warning signs promptly can help prevent issues leading to the C2318 code.

10. Can I fix the C2318 code in my Toyota myself, or should I seek professional help?

- Due to the complexity of the electronic power steering system and the potential safety implications, it is recommended to seek professional help to diagnose and repair the C2318 code in a Toyota.