AutoCodes – Toyota – B1788 2018 Toyota RAV4

B1788 2018 Toyota RAV4 Code - Rear Occupant Classification Sensor Right Collision Detection

Quick Answer

The Diagnostic Trouble Code (DTC) B1788 is output when the Occupant Detection ECU receives a collision detection signal sent by the Rear Occupant Classification Sensor Right (RH) when an accident occurs. Common causes include Faulty Separate Type Rear Seat Cushion Spring Assembly Right (Rear Occupant Classification Sensor Right), Separate Type Rear Seat Cushion Spring Assembly Right harness is open or shorted, Separate Type Rear Seat Cushion Spring Assembly Right 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: B1788 2018 Toyota RAV4 indicates Rear Occupant Classification Sensor Right Collision Detection.
Common causes: Common causes include Faulty Separate Type Rear Seat Cushion Spring Assembly Right (Rear Occupant Classification Sensor Right), Separate Type Rear Seat Cushion Spring Assembly Right harness is open or shorted, Separate Type Rear Seat Cushion Spring Assembly Right 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 242

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 B1788 2018 Toyota RAV4 Description

The Diagnostic Trouble Code (DTC) B1788 is output when the Occupant Detection ECU receives a collision detection signal sent by the Rear Occupant Classification Sensor Right (RH) when an accident occurs. DTC B1788 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 B1788 can be cleared by performing the zero point calibration and sensitivity check. Therefore, when DTC B1788 is output, first perform the zero point calibration and sensitivity check.

OBDII Code B1788 2018 Toyota RAV4 - Rear Occupant Classification Sensor Right Collision Detection - AutoCodes.com — B1788 2018 Toyota RAV4 Code - Rear Occupant Classification Sensor Right Collision Detection

What does this mean?

What are the Possible Causes of the DTC B1788 2018 Toyota RAV4?

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

How to Fix the DTC B1788 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 B1788 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 B1788 2018 Toyota RAV4 code?

Need more information on how to fix the B1788 2018 Toyota RAV4 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1788 2018 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 B1788 2018 Toyota RAV4 Code

1. What does OBDII code B1788 for a 2018 Toyota RAV4 mean?

The code B1788 indicates a fault with the Rear Occupant Classification Sensor Right Collision Detection system in the vehicle.

2. What are the common symptoms of a B1788 fault in a 2018 Toyota RAV4?

Common symptoms include the airbag warning light illuminating on the dashboard and potential issues with the airbag deployment system.

3. What are some possible causes of the B1788 OBDII code in a 2018 Toyota RAV4?

Potential causes of the B1788 code include a faulty rear occupant classification sensor, damaged wiring or connectors, or a problem with the airbag control module.

4. How can I diagnose a B1788 fault in my 2018 Toyota RAV4?

Diagnosing a B1788 fault typically involves using an OBDII scanner to retrieve the specific error code, inspecting the rear occupant classification sensor and its connections, and checking for any visible damage or issues.

5. Can I repair a B1788 fault in a 2018 Toyota RAV4 myself?

While some basic inspections and checks can be done by DIY enthusiasts, repairing a B1788 fault often requires specialized tools and expertise. It is recommended to consult a qualified mechanic or dealership for proper diagnosis and repair.

6. Is it safe to drive my 2018 Toyota RAV4 with a B1788 fault code?

It is not advisable to drive the vehicle with a B1788 fault, as it could potentially affect the proper functioning of the airbag system in case of an accident.

7. How much does it typically cost to repair a B1788 fault in a 2018 Toyota RAV4?

The cost of repairing a B1788 fault can vary depending on the specific cause of the issue, the required parts, and labor costs. It is recommended to obtain quotes from different repair shops for an accurate estimate.

8. Can a B1788 fault in a 2018 Toyota RAV4 be reset without repairs?

While clearing the error code temporarily may be possible, it is crucial to address the underlying issue causing the B1788 fault to ensure the safety and proper functionality of the airbag system.

9. Are there any recalls or service bulletins related to the B1788 code in 2018 Toyota RAV4 vehicles?

It is advisable to check with Toyota dealership or visit the National Highway Traffic Safety Administration (NHTSA) website for any relevant recalls or service bulletins related to the B1788 fault in 2018 Toyota RAV4 models.

10. How often does the Rear Occupant Classification Sensor Right Collision Detection system fail in 2018 Toyota RAV4 vehicles?

The failure rate of the Rear Occupant Classification Sensor Right Collision Detection system can vary, and factors such as vehicle usage, maintenance, and environmental conditions can impact the likelihood of experiencing a B1788 fault.