AutoCodes – Toyota – B1242 2016 Toyota RAV4

B1242 2016 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 2016 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 583

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 2016 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 2016 Toyota RAV4 - Wireless Door Lock Tuner Circuit Malfunction - AutoCodes.com — B1242 2016 Toyota RAV4 Code - Wireless Door Lock Tuner Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC B1242 2016 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 2016 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 2016 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 2016 Toyota RAV4 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 2016 Toyota RAV4 Code

1. What are common symptoms of OBDII code B1242 in a 2016 Toyota RAV4?

- Common symptoms include issues with the wireless door lock system, such as malfunctioning door locks or key fob not working properly.

2. What does the OBDII code B1242 indicate in a 2016 Toyota RAV4?

- OBDII code B1242 indicates a Wireless Door Lock Tuner Circuit Malfunction in the vehicle's door lock system.

3. What are possible causes of the B1242 code in a 2016 Toyota RAV4?

- Possible causes of the B1242 code include faulty door lock actuators, wiring issues, damaged door control modules, or a malfunctioning key fob.

4. How can I diagnose the B1242 code in my 2016 Toyota RAV4?

- Diagnosis typically involves inspecting the door lock system components, checking the wiring for damage, testing the door lock actuators, and scanning the vehicle's computer for fault codes.

5. Can I still drive my 2016 Toyota RAV4 with the B1242 code present?

- It is generally safe to drive the vehicle with the B1242 code, but it is recommended to address the issue promptly to avoid potential inconvenience or security concerns.

6. How can I repair the Wireless Door Lock Tuner Circuit Malfunction in my 2016 Toyota RAV4?

- Repair may involve replacing faulty door lock actuators, repairing damaged wiring, resetting the door control module, or reprogramming the key fob.

7. Is it necessary to reset the OBDII code B1242 after repairing the issue in a 2016 Toyota RAV4?

- Yes, it is recommended to reset the B1242 code using an OBDII scanner after repairing the underlying cause to clear the fault code and ensure the issue has been resolved.

8. Can extreme weather conditions cause the B1242 code to appear in a 2016 Toyota RAV4?

- Extreme weather conditions can potentially affect the door lock system components and wiring, leading to the B1242 code. It is essential to keep the vehicle protected in such conditions.

9. Are there any preventive maintenance tips to avoid the B1242 code in a 2016 Toyota RAV4?

- Regularly inspecting and maintaining the door lock system, ensuring proper functioning of key fobs, and addressing any issues promptly can help prevent the occurrence of the B1242 code.

10. Can a DIY enthusiast fix the B1242 code in a 2016 Toyota RAV4, or should it be done by a professional?

- While some simple diagnosis and repairs can be done by a DIY enthusiast, complex issues related to the B1242 code may require the expertise of a professional mechanic to ensure proper resolution.