AutoCodes – Toyota – B1651 Toyota

B1651 Toyota Code - Manual Cut-Off Switch Trouble

Quick Answer

The Airbag Cut-Off Switch circuit consists of the Center Airbag Sensor and the Airbag Cut-Off Switch. Common causes include Faulty Airbag Cut-Off Switch, Airbag Cut-Off Switch harness is open or shorted, Airbag Cut-Off Switch 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: B1651 Toyota indicates Manual Cut-Off Switch Trouble.
Common causes: Common causes include Faulty Airbag Cut-Off Switch, Airbag Cut-Off Switch harness is open or shorted, Airbag Cut-Off Switch 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 9,484

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 28, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1651 Toyota Description

The Airbag Cut-Off Switch circuit consists of the Center Airbag Sensor and the Airbag Cut-Off Switch. The Front Passenger Airbag can be optionally deactivated via this circuit by turning the Airbag Cut-Off Switch to the OFF position. If the Front Passenger Airbag is deactivated, the passenger airbag OFF indicator comes on to inform the passengers. The Diagnostic Trouble Code (DTC) B1651 is recorded when a malfunction is detected in the Airbag Cut-Off Switch circuit.

OBDII Code B1651 Toyota - Manual Cut-Off Switch Trouble - AutoCodes.com — B1651 Toyota Code - Manual Cut-Off Switch Trouble

What does this mean?

What are the Possible Causes of the DTC B1651 Toyota?

Faulty Airbag Cut-Off Switch
Airbag Cut-Off Switch harness is open or shorted
Airbag Cut-Off Switch circuit poor electrical connection
Faulty Center Airbag Sensor Assembly

How to Fix the DTC B1651 Toyota?

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 B1651 Toyota 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 B1651 Toyota code?

Need more information on how to fix the B1651 Toyota code? Get Access to Factory Service Manuals

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Get the B1651 Toyota code diagnosed by a professional: Find a repair shop in your area

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

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 B1651 Toyota Code

1. What are the common symptoms of OBDII code B1651 in a Toyota related to the manual cut-off switch?

The common symptoms include difficulty starting the vehicle, sudden engine shutdown while driving, and issues with the vehicle's electrical systems.

2. What could cause the OBDII code B1651 in a Toyota related to the manual cut-off switch?

The code B1651 is typically triggered by a malfunction in the manual cut-off switch itself, a faulty wiring connection, or a problem with the switch's control module.

3. How can I diagnose the issue with the manual cut-off switch triggering OBDII code B1651 in my Toyota?

To diagnose the problem, you can visually inspect the switch and its wiring for any visible damage, test the switch for continuity using a multimeter, and scan the vehicle's system for any additional error codes.

4. Are there any repair tips for fixing the OBDII code B1651 related to the manual cut-off switch in a Toyota?

Repair tips include checking and repairing any damaged wiring, replacing the manual cut-off switch if necessary, and resetting the fault codes after making the repairs.

5. Can I reset the OBDII code B1651 manually without fixing the issue with the manual cut-off switch?

While you can clear the fault code using an OBDII scanner, it is not recommended to do so without addressing the underlying issue with the manual cut-off switch as it may lead to potential safety hazards.

6. Is it safe to continue driving my Toyota with the OBDII code B1651 related to the manual cut-off switch?

It is not advisable to drive the vehicle with this code present, as it can cause unexpected engine shutdowns and compromise the safety and performance of the vehicle.

7. How much does it typically cost to repair the manual cut-off switch issue triggering OBDII code B1651 in a Toyota?

The cost of repair can vary depending on the extent of the damage and whether you choose to replace the switch yourself or have it done by a professional. It could range from a few hundred to a thousand dollars.

8. Can a DIY enthusiast fix the OBDII code B1651 related to the manual cut-off switch in a Toyota?

Yes, if you have the necessary tools, knowledge, and experience working on automotive electrical systems, you can attempt to diagnose and repair the issue yourself following proper safety precautions.

9. Will the OBDII code B1651 reset itself after the manual cut-off switch issue is fixed in a Toyota?

Once the underlying issue with the manual cut-off switch triggering the code has been resolved, you may need to clear the fault code using an OBDII scanner to reset it from the vehicle's system.

10. Are there any recalls or technical service bulletins related to the OBDII code B1651 in Toyota vehicles?

It is recommended to check with your local Toyota dealership or visit the manufacturer's website to see if there are any recalls or technical service bulletins addressing the OBDII code B1651 related to the manual cut-off switch issue in your specific Toyota model.