B1787 2016 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 2016 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 2016 Toyota RAV4 Description
What are the Possible Causes of the DTC B1787 2016 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 2016 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 2016 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 2016 Toyota RAV4 code?
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Need Help with the Code?
Get the B1787 2016 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 2016 Toyota RAV4 Code
1. What does OBDII code B1787 mean on a 2016 Toyota RAV4?
Code B1787 indicates an issue with the Rear Occupant Classification Sensor Left, specifically related to collision detection.
2. What are the symptoms of code B1787 in a 2016 Toyota RAV4?
Common symptoms include the airbag warning light illuminating and possible deactivation of the airbag system for the affected area.
3. What causes code B1787 to appear in a 2016 Toyota RAV4?
The code is typically caused by a faulty rear occupant classification sensor, damaged wiring, or a previous collision that affected the sensor.
4. Can code B1787 affect airbag deployment in a 2016 Toyota RAV4?
Yes, it can impact airbag functionality, potentially preventing deployment in the affected area during a collision.
5. How do you diagnose code B1787 in a 2016 Toyota RAV4?
Diagnosis involves scanning the vehicle with an OBDII scanner, inspecting the rear occupant classification sensor, and checking the wiring for damage or disconnections.
6. Can a previous accident trigger code B1787 in a Toyota RAV4?
Yes, a previous collision can damage the rear occupant classification sensor, triggering the code.
7. How do you fix code B1787 in a 2016 Toyota RAV4?
Repairs may include replacing the faulty sensor, repairing damaged wiring, or reprogramming the airbag system if needed.
8. Is it safe to drive with code B1787 on a 2016 Toyota RAV4?
Driving may be safe, but the airbag system for the affected area might not function properly, posing a safety risk in an accident.
9. How much does it cost to repair code B1787 on a 2016 Toyota RAV4?
Repair costs vary but may range from $100 to $500, depending on whether the issue is with the sensor, wiring, or additional components.
10. Can disconnecting the battery clear code B1787 in a 2016 Toyota RAV4?
Disconnecting the battery might temporarily clear the code, but the underlying issue must be repaired to prevent it from returning.
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