AutoCodes – Generic – B15C5

B15C5 Code - Manual Button Malfunction

Quick Answer

This Diagnostic Trouble Code (DTC) is set when the Data Communication Module (DCM) (Telematics Transceiver) detects an open or short circuit in the manual (SOS) switch. Common causes include Faulty Map Light Assembly, Map Light Assembly harness is open or shorted, Map Light Assembly 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: B15C5 indicates Manual Button Malfunction.
Common causes: Common causes include Faulty Map Light Assembly, Map Light Assembly harness is open or shorted, Map Light Assembly 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 1,987

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 May 21, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B15C5 Description

This Diagnostic Trouble Code (DTC) is set when the Data Communication Module (DCM) (Telematics Transceiver) detects an open or short circuit in the manual (SOS) switch.

OBDII Code B15C5 - Manual Button Malfunction - AutoCodes.com — B15C5 Code - Manual Button Malfunction

What does this mean?

What are the Possible Causes of the DTC B15C5?

Faulty Map Light Assembly
Map Light Assembly harness is open or shorted
Map Light Assembly circuit poor electrical connection
Faulty Data Communication Module (DCM) (Telematics Transceiver)

How to Fix the DTC B15C5?

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 B15C5 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 B15C5 code?

Need more information on how to fix the B15C5 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B15C5 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B15C5 Lexus — Manual Button Malfunction
B15C5 Toyota — Manual Button Malfunction

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 B15C5 Code

1. What are the common symptoms of OBDII code B15C5 (Manual Button Malfunction)?

- Common symptoms include the manual button on the vehicle's control panel not responding or working intermittently.

2. What are the possible causes of OBDII code B15C5?

- The code B15C5 can be caused by a faulty manual button switch, wiring issues, or a malfunction in the control module.

3. How can I diagnose the Manual Button Malfunction associated with code B15C5?

- To diagnose the issue, check the wiring connected to the manual button for any damage or loose connections. Test the manual button switch for proper functionality using a multimeter.

4. Is it safe to continue driving with OBDII code B15C5 triggered?

- It is generally safe to drive with this code, as it mainly affects the manual button's operation and does not pose a significant safety risk. However, it is recommended to address the issue promptly.

5. Can I repair OBDII code B15C5 on my own?

- Depending on your automotive repair skills, you may be able to repair the manual button malfunction associated with this code by replacing the faulty switch or repairing any damaged wiring.

6. Will resetting the vehicle's computer clear OBDII code B15C5?

- Resetting the vehicle's computer may temporarily clear the code, but if the underlying issue causing the Manual Button Malfunction is not addressed, the code is likely to reappear.

7. How much does it typically cost to repair OBDII code B15C5?

- The cost of repairing OBDII code B15C5 can vary depending on the root cause of the issue, but it may involve replacing the manual button switch or repairing wiring, with potential costs ranging from $50 to $200 or more.

8. Are there any temporary fixes for OBDII code B15C5?

- Temporary fixes for this code may include cleaning the manual button switch contacts or ensuring proper connection of the wiring to alleviate intermittent issues.

9. Can a Manual Button Malfunction cause other problems in the vehicle?

- While the Manual Button Malfunction itself may not cause significant issues, it can affect the convenience and functionality of certain vehicle features controlled by the manual button.

10. Is it necessary to use a scan tool to clear OBDII code B15C5 after the repair?

- Using a scan tool to clear the code after repairing the Manual Button Malfunction is recommended to ensure the issue is resolved and the code does not reappear.