AutoCodes – Toyota – B1787 2013 Toyota RAV4

B1787 2013 Toyota RAV4 Code - Rear Occupant Classification Sensor Left Collision Detection

Quick Answer

The Diagnostic Trouble Code (DTC) B1787 is output when the Occupant Detection ECU receives a collision detection signal sent by the Rear Occupant Classification Sensor Left (LH) when an accident occurs. Common causes include Faulty Separate Type Rear Seat Cushion Spring Assembly Left (Rear Occupant Classification Sensor Left), Separate Type Rear Seat Cushion Spring Assembly Left harness is open or shorted, Separate Type Rear Seat Cushion Spring Assembly Left 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: B1787 2013 Toyota RAV4 indicates Rear Occupant Classification Sensor Left Collision Detection.
Common causes: Common causes include Faulty Separate Type Rear Seat Cushion Spring Assembly Left (Rear Occupant Classification Sensor Left), Separate Type Rear Seat Cushion Spring Assembly Left harness is open or shorted, Separate Type Rear Seat Cushion Spring Assembly Left 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 393

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Oct 16, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1787 2013 Toyota RAV4 Description

The Diagnostic Trouble Code (DTC) B1787 is output when the Occupant Detection ECU receives a collision detection signal sent by the Rear Occupant Classification Sensor Left (LH) when an accident occurs. DTC B1787 is also stored when the separate type of front seat cushion spring assembly is subjected to a strong impact, even if an actual accident has not occurred. However, when the Occupant Detection ECU outputs a collision detection signal, even if the vehicle is not in a collision, DTC B1787 can be cleared by performing the zero point calibration and sensitivity check. Therefore, when DTC B1787 is output, first perform the zero point calibration and sensitivity check.

OBDII Code B1787 2013 Toyota RAV4 - Rear Occupant Classification Sensor Left Collision Detection - AutoCodes.com — B1787 2013 Toyota RAV4 Code - Rear Occupant Classification Sensor Left Collision Detection

What does this mean?

What are the Possible Causes of the DTC B1787 2013 Toyota RAV4?

Faulty Separate Type Rear Seat Cushion Spring Assembly Left (Rear Occupant Classification Sensor Left)
Separate Type Rear Seat Cushion Spring Assembly Left harness is open or shorted
Separate Type Rear Seat Cushion Spring Assembly Left circuit poor electrical connection
Faulty Occupant Detection ECU

How to Fix the DTC B1787 2013 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 B1787 2013 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 B1787 2013 Toyota RAV4 code?

Need more information on how to fix the B1787 2013 Toyota RAV4 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1787 2013 Toyota RAV4 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 B1787 2013 Toyota RAV4 Code

1. What are the common symptoms of OBDII code B1787 in a 2013 Toyota RAV4?

The common symptoms of OBDII code B1787 in a 2013 Toyota RAV4 include issues with the rear occupant classification sensor left collision detection system, such as airbag warning lights illuminating on the dashboard.

2. What does the OBDII code B1787 in a 2013 Toyota RAV4 indicate?

OBDII code B1787 in a 2013 Toyota RAV4 specifically relates to a fault detected in the rear occupant classification sensor left collision detection system.

3. What are the possible causes of OBDII code B1787 in a 2013 Toyota RAV4?

Possible causes of OBDII code B1787 in a 2013 Toyota RAV4 include a malfunctioning rear occupant classification sensor, wiring issues, or a faulty airbag control module.

4. How can I diagnose the issue related to OBDII code B1787 in my 2013 Toyota RAV4?

Diagnosing the issue related to OBDII code B1787 in a 2013 Toyota RAV4 typically involves using a diagnostic scanner to retrieve the specific fault code and conducting further inspection of the rear occupant classification sensor system.

5. Is it safe to drive my 2013 Toyota RAV4 with OBDII code B1787?

It is not recommended to drive your 2013 Toyota RAV4 with OBDII code B1787, as this fault may affect the proper functioning of the rear occupant classification sensor left collision detection system, potentially compromising passenger safety in the event of a collision.

6. Can I reset the OBDII code B1787 in my 2013 Toyota RAV4 myself?

While you may be able to clear the OBDII code B1787 temporarily by disconnecting the vehicle's battery, it is important to address the underlying issue causing the fault to ensure the safety systems are functioning correctly.

7. How much does it typically cost to repair OBDII code B1787 in a 2013 Toyota RAV4?

The cost of repairing OBDII code B1787 in a 2013 Toyota RAV4 can vary depending on the specific cause of the fault, but it may involve replacing the rear occupant classification sensor or addressing wiring issues, which can range from a few hundred to over a thousand dollars.

8. Can I continue to use the rear seats in my 2013 Toyota RAV4 if OBDII code B1787 is present?

It is not advisable to use the rear seats in your 2013 Toyota RAV4 if OBDII code B1787 is present, as the fault may affect the proper functioning of the rear occupant classification sensor left collision detection system, potentially impacting the deployment of airbags in a collision.

9. Are there any recalls related to OBDII code B1787 in the 2013 Toyota RAV4?

It is advisable to check with the manufacturer or authorized service centers for any recalls related to OBDII code B1787 in the 2013 Toyota RAV4, as certain issues may be covered under warranty or recall campaigns.

10. Can I fix OBDII code B1787 in my 2013 Toyota RAV4 myself?

Repairing OBDII code B1787 in a 2013 Toyota RAV4 may require specialized knowledge and tools, so it is recommended to consult with a qualified mechanic or dealership to accurately diagnose and resolve the issue with the rear occupant classification sensor left collision detection system.