AutoCodes – Toyota – B1242 2018 Toyota RAV4

B1242 2018 Toyota RAV4 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 2018 Toyota RAV4 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.

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Code Popularity 411

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 19, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1242 2018 Toyota RAV4 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 2018 Toyota RAV4 - Wireless Door Lock Tuner Circuit Malfunction - AutoCodes.com — B1242 2018 Toyota RAV4 Code - Wireless Door Lock Tuner Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC B1242 2018 Toyota RAV4?

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 2018 Toyota RAV4?

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 2018 Toyota RAV4 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 2018 Toyota RAV4 code?

Need more information on how to fix the B1242 2018 Toyota RAV4 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1242 2018 Toyota RAV4 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 B1242 2018 Toyota RAV4 Code

1. What are the common symptoms of OBDII code B1242 in a 2018 Toyota RAV4?

The common symptoms of OBDII code B1242 in a 2018 Toyota RAV4 include issues with the wireless door lock system, such as difficulty locking or unlocking the doors remotely.

2. What does the OBDII code B1242 indicate in a 2018 Toyota RAV4?

OBDII code B1242 in a 2018 Toyota RAV4 indicates a Wireless Door Lock Tuner Circuit Malfunction.

3. What are the possible causes of OBDII code B1242 in a 2018 Toyota RAV4?

Possible causes of OBDII code B1242 in a 2018 Toyota RAV4 include faulty wiring, a malfunctioning door lock actuator, or a problem with the wireless door lock tuner module.

4. How can I diagnose the OBDII code B1242 in my 2018 Toyota RAV4?

Diagnosing OBDII code B1242 in a 2018 Toyota RAV4 involves checking the wiring connections, testing the door lock actuator, and inspecting the wireless door lock tuner module for any visible damage.

5. Can I still drive my 2018 Toyota RAV4 with OBDII code B1242?

While it may be possible to drive your 2018 Toyota RAV4 with OBDII code B1242, it is recommended to address the issue promptly to ensure the proper functioning of the wireless door lock system.

6. How can I repair OBDII code B1242 in my 2018 Toyota RAV4?

Repairing OBDII code B1242 in a 2018 Toyota RAV4 may involve repairing or replacing faulty wiring, replacing the door lock actuator, or repairing/replacing the wireless door lock tuner module.

7. Is it safe to attempt DIY repairs for OBDII code B1242 in my 2018 Toyota RAV4?

While some DIY enthusiasts may be able to address OBDII code B1242 in a 2018 Toyota RAV4, it is recommended to consult a professional technician for accurate diagnosis and proper repair.

8. How much does it typically cost to fix OBDII code B1242 in a 2018 Toyota RAV4?

The cost of fixing OBDII code B1242 in a 2018 Toyota RAV4 can vary depending on the specific issue and the labor rates of the repair shop. It is advisable to obtain quotes from multiple service centers.

9. Will resetting the OBDII code B1242 clear the issue in my 2018 Toyota RAV4?

Resetting the OBDII code B1242 may temporarily clear the error code, but the underlying issue causing the Wireless Door Lock Tuner Circuit Malfunction will need to be addressed to prevent the code from reappearing.

10. How important is it to fix OBDII code B1242 promptly in a 2018 Toyota RAV4?

It is important to address OBDII code B1242 promptly in a 2018 Toyota RAV4 to ensure the proper functioning of the wireless door lock system and maintain the security of the vehicle.