B1788 Scion 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 Scion 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.
Code B1788 Scion Description
What are the Possible Causes of the DTC B1788 Scion?
- 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 Scion?
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 Scion 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.
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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 B1788 Scion Code
1. What does the OBDII code B1788 mean on a Scion?
B1788 indicates an issue with the Rear Occupant Classification Sensor (Right) detecting a collision or malfunction in its circuit.
2. What are common symptoms of code B1788 in a Scion?
Symptoms may include the airbag warning light being illuminated, improper airbag deployment functionality, or issues with the occupant classification system.
3. What causes the B1788 code to appear in a Scion?
Common causes include a damaged or faulty rear occupant classification sensor, wiring issues such as short circuits or open circuits, or a previous collision affecting the sensor.
4. Can a previous accident cause the B1788 code to trigger?
Yes, if the vehicle was involved in a collision, the Rear Occupant Classification Sensor (Right) may have been damaged, causing the code to appear.
5. How do I diagnose the B1788 code in my Scion?
Diagnosis typically involves scanning the OBDII system, visually inspecting the wiring and connections to the rear occupant classification sensor, and testing the sensor for proper functionality.
6. Can I drive my Scion with the B1788 code active?
While the vehicle may be drivable, the airbag system may not function correctly, which could compromise safety in the event of an accident.
7. How is the B1788 code fixed in a Scion?
Repairs may include replacing the faulty rear occupant classification sensor, repairing damaged wiring or connectors, or recalibrating the system using a scan tool.
8. How much does it cost to repair the B1788 code on a Scion?
Repair costs vary but may range from $100 to $500 depending on the extent of damage and whether the sensor or wiring needs replacement.
9. Can a malfunctioning airbag system cause the B1788 code?
Yes, if the airbag system is not functioning properly or has been compromised, it could affect the occupant classification sensor and trigger the code.
10. Do I need to reset the system after fixing the B1788 code?
Yes, after repairs, the OBDII system should be cleared using a scan tool to ensure the code does not reappear.
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