AutoCodes – Scion – C1311 Scion

C1311 Scion Code - Open In Main Relay 1 Circuit

Quick Answer

The Anti-Lock Brake System (ABS) main relay 1 (ABS No.1 relay) supplies power to the changeover solenoid and the linear solenoid. Common causes include Faulty Anti-Lock Brake System (ABS) Main Relay 1, ABS Main Relay 1 harness is open or shorted, ABS Main Relay 1 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: C1311 Scion indicates Open In Main Relay 1 Circuit.
Common causes: Common causes include Faulty Anti-Lock Brake System (ABS) Main Relay 1, ABS Main Relay 1 harness is open or shorted, ABS Main Relay 1 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 1,074

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 Sep 06, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1311 Scion Description

The Anti-Lock Brake System (ABS) main relay 1 (ABS No.1 relay) supplies power to the changeover solenoid and the linear solenoid. ABS main relay 2 (ABS No.2 relay) goes on for approximately 5 seconds after the ignition switch is turned off and the braking effort signal input is terminated. ABS main relay 2 (ABS No.2 relay) supplies electricity and maintains operating condition for the brake system when the ignition switch is off.

OBDII Code C1311 Scion - Open In Main Relay 1 Circuit - AutoCodes.com — C1311 Scion Code - Open In Main Relay 1 Circuit

What does this mean?

What are the Possible Causes of the DTC C1311 Scion?

Faulty Anti-Lock Brake System (ABS) Main Relay 1
ABS Main Relay 1 harness is open or shorted
ABS Main Relay 1 circuit poor electrical connection

How to Fix the DTC C1311 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 C1311 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 C1311 Scion Code

1. What are the common symptoms of OBDII code C1311 in a Scion related to an open in Main Relay 1 circuit?

The common symptoms include difficulty starting the vehicle, engine stalling, and illumination of the Check Engine Light.

2. What can cause OBDII code C1311 in a Scion indicating an open in Main Relay 1 circuit?

The code can be triggered by a faulty main relay, damaged wiring or connectors in the circuit, or a problem with the relay control module.

3. How can I diagnose the issue causing OBDII code C1311 in my Scion?

To diagnose the problem, you can perform a visual inspection of the wiring and connectors, test the main relay for proper operation, and use a scan tool to check for any related trouble codes.

4. Is it safe to continue driving my Scion with OBDII code C1311 indicating an open in Main Relay 1 circuit?

It is not recommended to drive the vehicle with this issue, as it can lead to potential stalling or starting problems, which may compromise safety.

5. Can I repair OBDII code C1311 in my Scion indicating an open in Main Relay 1 circuit myself?

If you have the necessary tools and expertise, you may be able to repair the issue yourself by replacing the faulty main relay or repairing the damaged wiring. However, seeking professional help is advised.

6. How much does it typically cost to repair OBDII code C1311 in a Scion related to an open in Main Relay 1 circuit?

The cost of repair can vary depending on the extent of the issue and labor rates in your area. It may range from around $100 to $300 or more.

7. What are some tips to prevent OBDII code C1311 from reoccurring in my Scion after repair?

To prevent the code from reoccurring, ensure all wiring and connectors are properly secured and insulated, use high-quality replacement parts, and follow proper installation procedures.

8. Can a weak battery or alternator cause OBDII code C1311 in a Scion?

Yes, a weak battery or alternator can potentially cause issues with the main relay circuit, leading to the triggering of OBDII code C1311. It's important to check the battery and charging system if this code appears.

9. Are there any recalls or technical service bulletins related to OBDII code C1311 in Scion vehicles?

It's recommended to check with the manufacturer or authorized dealerships for any recalls or technical service bulletins related to this specific OBDII code in Scion vehicles.

10. How urgent is it to address OBDII code C1311 indicating an open in Main Relay 1 circuit in my Scion?

It is advisable to address the issue promptly to avoid potential starting or stalling problems while driving. Ignoring the code may lead to further complications and safety risks.