B1787 2018 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 2018 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.
Code B1787 2018 Toyota RAV4 Description
What are the Possible Causes of the DTC B1787 2018 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 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 B1787 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 B1787 2018 Toyota RAV4 code?
Need more information on how to fix the B1787 2018 Toyota RAV4 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B1787 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.
Frequently Asked Questions about B1787 2018 Toyota RAV4 Code
What does OBDII code B1787 mean for a 2018 Toyota RAV4?
B1787 indicates a fault with the rear occupant classification sensor on the left side, specifically related to collision detection.
What are the common symptoms of code B1787?
Common symptoms include warning lights on the dashboard, malfunctioning rear seat airbags, and potential issues with the occupant detection system.
What causes the B1787 code to trigger?
The code can be triggered by a faulty rear occupant classification sensor, damaged wiring or connectors, or issues within the airbag control module.
How can I diagnose the B1787 code?
To diagnose B1787, use an OBDII scanner to confirm the code and check for related codes. Inspect the rear occupant classification sensor and wiring for damage.
Can I drive my 2018 Toyota RAV4 with the B1787 code?
While you can technically drive the vehicle, it is not recommended as it may lead to airbag system malfunction, increasing the risk of injury in an accident.
What repairs are typically needed to fix the B1787 code?
Repairs may involve replacing the rear occupant classification sensor, repairing damaged wiring, or reprogramming the airbag control module if necessary.
How do I reset the B1787 code after repairs?
After repairs, the code can be reset using an OBDII scanner. Ensure that the issue is resolved before clearing the code.
Is the rear occupant classification sensor expensive to replace?
The cost of replacing the rear occupant classification sensor can vary, but it typically ranges from $150 to $400, depending on parts and labor.
Can I fix the B1787 code myself?
If you have experience with automotive repairs, you may be able to diagnose and replace the sensor yourself, but it is recommended to consult a professional for airbag system issues.
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