AutoCodes – Scion – B1242 Scion

B1242 Scion Code - Wireless Door Lock Tuner Circuit Malfunction

Quick Answer

The Door Control Receiver is used to receive radio waves related to the entry functions of the electrical key transmitter sub-assembly. Common causes include Faulty Door Control Receiver, Door Control Receiver harness is open or shorted, Door Control Receiver circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means
B1242 Scion indicates Wireless Door Lock Tuner Circuit Malfunction.
Common causes
Common causes include Faulty Door Control Receiver, Door Control Receiver harness is open or shorted, Door Control Receiver circuit poor electrical connection.
Severity
Low - monitor the vehicle and repair when practical.
Can I drive?
The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 1,745
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Nov 19, 2024
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Code B1242 Scion Description

The Door Control Receiver is used to receive radio waves related to the entry functions of the electrical key transmitter sub-assembly. The certification ECU (smart key ECU assembly) decodes the requested electrical key transmitter sub-assembly operation by identifying a key code based on the radio waves received via the door control receiver. The door control receiver receives a signal from the electrical key transmitter sub-assembly and sends signals to the main body ECU (multiplex network body ECU) through the certification ECU (smart key ECU assembly). (For example, if a door lock operation is requested, the certification ECU [smart key ECU assembly] sends a door lock command to the main body ECU [multiplex network body ECU]).
OBDII Code B1242 Scion - Wireless Door Lock Tuner Circuit Malfunction - AutoCodes.com
B1242 Scion Code - Wireless Door Lock Tuner Circuit Malfunction

What are the Possible Causes of the DTC B1242 Scion?

  • Faulty Door Control Receiver
  • Door Control Receiver harness is open or shorted
  • Door Control Receiver circuit poor electrical connection
  • Faulty Certification ECU (Smart Key ECU Assembly)

How to Fix the DTC B1242 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 B1242 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 B1242 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 B1242 Scion Code

1. What are the common symptoms of OBDII code B1242 in a Scion related to the Wireless Door Lock Tuner Circuit Malfunction?

Common symptoms may include issues with the wireless door lock system, such as doors not locking or unlocking properly using the remote key fob.

2. What are some possible causes of the B1242 OBDII code in a Scion?

Potential causes of the B1242 code could include a faulty wireless door lock tuner module, wiring issues, or a problem with the door lock actuators.

3. How can I diagnose the Wireless Door Lock Tuner Circuit Malfunction in my Scion when the B1242 code is triggered?

Diagnosing the issue may involve checking the wiring connections, testing the door lock actuators, and inspecting the wireless door lock tuner module for any signs of damage or malfunction.

4. Can I still drive my Scion with the B1242 code present?

While it may be possible to drive the vehicle with the B1242 code, it is recommended to address the issue promptly to avoid potential safety concerns or further damage to the door lock system.

5. How can I repair the Wireless Door Lock Tuner Circuit Malfunction in my Scion?

Repairing the issue may involve replacing the faulty wireless door lock tuner module, repairing any damaged wiring, or addressing issues with the door lock actuators as needed.

6. Is it possible to reset the B1242 OBDII code in a Scion without fixing the underlying issue?

Resetting the code without addressing the root cause may temporarily clear the warning light, but the issue is likely to reoccur until the underlying problem is resolved.

7. Can a DIY enthusiast fix the B1242 code in a Scion, or is professional assistance recommended?

Depending on your experience and comfort level with automotive repairs, you may be able to diagnose and repair the issue yourself. However, seeking professional assistance is recommended for complex electrical issues.

8. Are there any preventative measures to avoid triggering the B1242 code in a Scion?

Regularly inspecting the wireless door lock system for any signs of wear or damage, as well as addressing any issues promptly, can help prevent the B1242 code from being triggered.

9. How long does it typically take to repair the Wireless Door Lock Tuner Circuit Malfunction in a Scion?

The repair time can vary depending on the specific cause of the issue and the extent of the repairs needed. It is advisable to consult a mechanic for a more accurate estimate.

10. Will fixing the B1242 code improve the overall functionality of the door lock system in my Scion?

Addressing the Wireless Door Lock Tuner Circuit Malfunction should restore proper functionality to the door lock system, allowing you to lock and unlock your vehicle using the remote key fob as intended.

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