AutoCodesScion – C1218 Scion

C1218 Scion Code - SMC2 Circuit

Quick Answer

The Anti-Lock Brake System (ABS) solenoid turns on when signals are received from the ABS Electronic Control Unit (ECU) and controls pressure acting on calipers/wheel cylinders, thus controlling braking force. Common causes include Faulty Anti-Lock Brake System (ABS) Electronic Control Unit (ECU) (ABS Actuator), ABS ECU harness is open or shorted, ABS 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
C1218 Scion indicates SMC2 Circuit.
Common causes
Common causes include Faulty Anti-Lock Brake System (ABS) Electronic Control Unit (ECU) (ABS Actuator), ABS ECU harness is open or shorted, ABS 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 1,014
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 24, 2020
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Code C1218 Scion Description

The Anti-Lock Brake System (ABS) solenoid turns on when signals are received from the ABS Electronic Control Unit (ECU) and controls pressure acting on calipers/wheel cylinders, thus controlling braking force. The ABS ECU sets the OBDII code when the Solenoid is not to factory specifications. The solenoid and solenoid relay is built into the ABS ECU.
OBDII Code C1218 Scion - SMC2 Circuit - AutoCodes.com
C1218 Scion Code - SMC2 Circuit

What are the Possible Causes of the DTC C1218 Scion?

  • Faulty Anti-Lock Brake System (ABS) Electronic Control Unit (ECU) (ABS Actuator)
  • ABS ECU harness is open or shorted
  • ABS ECU circuit poor electrical connection

How to Fix the DTC C1218 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 C1218 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.

Need more information about the C1218 Scion code?

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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 C1218 Scion Code

1. What does the OBDII code C1218 indicate on a Scion?

The C1218 code on a Scion indicates an issue with the SMC2 (Steering Motor Control 2) circuit, which is part of the vehicle’s steering system.

2. What are common symptoms of the C1218 code in a Scion?

Common symptoms include a stiffer steering wheel, warning lights on the dashboard (such as the ABS or steering warning light), and in some cases, increased effort required to steer the vehicle.

3. What can cause the C1218 code to appear on a Scion?

Potential causes include faulty steering motor, damaged wires or connectors in the steering control circuit, or problems with the power steering control module.

4. How is the C1218 code diagnosed in a Scion?

Diagnosis typically involves using a scan tool to read the fault code and examining the steering system for any visible issues with wiring or components. A technician may also perform electrical tests on the steering motor and control module.

5. What are the steps to repair a Scion displaying the C1218 code?

Repair steps can include replacing or repairing damaged wiring, replacing faulty components like the steering motor or control module, and clearing the code from the vehicle’s computer system after repairs to check if the issue is resolved.

6. Is it safe to drive a Scion with the C1218 code active?

While the vehicle may still be drivable, it is not advisable to drive with this code active as it could lead to reduced steering control, making the vehicle unsafe in certain driving conditions.

7. How urgent is it to address the C1218 code on a Scion?

It is fairly urgent to address this issue as it relates to the vehicle’s steering capability, which is critical for safe driving. Delaying repairs can lead to further damage or a potential safety hazard.

8. Can the C1218 code affect the overall performance of the Scion?

Yes, since it involves the steering system, it can affect the handling and performance of the vehicle, particularly the precision and effort required to steer the vehicle.

9. Are there any specific tools required to diagnose the C1218 code on a Scion?

Yes, a professional-grade OBDII scanner is necessary to properly diagnose the code. Additionally, electrical testing tools like a multimeter may be required to check the integrity of circuits and components.

10. Can a C1218 code result from a simple error or malfunction in the Scion’s system?

Yes, sometimes this code can be triggered by a temporary malfunction or a simple error in the vehicle’s electrical system. It’s advisable to first clear the code and see if it returns to confirm whether there is a persistent issue.

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