Engine-CodesScion – B1650 Scion

B1650 Scion Code - Occupant Classification System Malfunction

Quick Answer

The B1650 Scion code indicates a malfunction in the Occupant Classification System (OCS) of the vehicle. Common causes include Faulty OCS control module, Damaged or disconnected seat weight sensors, Wiring issues or loose connections in the OCS system. 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
B1650 Scion indicates Occupant Classification System Malfunction.
Common causes
Common causes include Faulty OCS control module, Damaged or disconnected seat weight sensors, Wiring issues or loose connections in the OCS system.
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.
Table of contents Created and updated by William Orellana on Sep 18, 2024
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Code B1650 Scion Description

The B1650 Scion code indicates a malfunction in the Occupant Classification System (OCS) of the vehicle. The OCS is a crucial safety feature that determines the weight of the occupant in the front passenger seat and adjusts the deployment of the airbag accordingly. When this system malfunctions, it can lead to serious safety concerns as the airbag may not deploy correctly in the event of a collision.

OBDII Code B1650 Scion - Occupant Classification System Malfunction
B1650 Scion Code - Occupant Classification System Malfunction

Common Causes of B1650 Scion

  1. Faulty OCS control module.
  2. Damaged or disconnected seat weight sensors.
  3. Wiring issues or loose connections in the OCS system.
  4. Software glitches or calibration errors in the OCS system.

Symptoms of B1650 Scion

  1. Airbag warning light illuminated on the dashboard.
  2. Intermittent airbag warning chime.
  3. Inconsistent deployment of the airbag in testing.
  4. Passenger airbag off light staying on when the seat is occupied.

How to Fix B1650 Scion

  1. Diagnose the issue by using a scan tool to retrieve the specific fault codes, including the B1650 code.
  2. Inspect the seat weight sensors and wiring for any damage or loose connections.
  3. Test the OCS control module for proper functionality and replace if necessary.
  4. Clear the fault codes from the system and recalibrate the OCS system.
  5. Perform a thorough test to ensure the OCS is functioning correctly and the airbag deploys as intended.

Cost to Fix B1650 Scion

The cost of repairing a B1650 Scion code can vary depending on the specific cause of the issue and the labor rates in your area. On average, the repair for an OCS malfunction can range from $200 to $600, including parts and labor. However, it's important to note that diagnostic time and labor rates at auto repair shops can vary significantly, so it's advisable to get a quote from a trusted mechanic before proceeding with the repair.

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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.

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 B1650 Scion Code

1. What are common symptoms of OBDII code B1650 Scion related to the Occupant Classification System Malfunction?

- Common symptoms include the airbag warning light staying on, the passenger airbag being disabled, and the seatbelt warning light illuminating.

2. What are some possible causes of the B1650 OBDII code in a Scion, indicating an Occupant Classification System Malfunction?

- Possible causes include a faulty occupant classification system sensor, damaged wiring or connectors, or a malfunctioning airbag control module.

3. How can I diagnose the B1650 code in my Scion related to the Occupant Classification System Malfunction?

- Diagnosis typically involves using a diagnostic scanner to retrieve the specific fault code, inspecting the occupant classification system components, and testing the sensor for proper functionality.

4. Can I repair the B1650 code related to the Occupant Classification System Malfunction in my Scion at home?

- While some basic checks like inspecting wiring and connectors can be done at home, repairing the issue often requires specialized tools and expertise, so it's recommended to consult a professional mechanic.

5. Is it safe to drive my Scion if the B1650 code indicating an Occupant Classification System Malfunction is present?

- It is not recommended to drive the vehicle with an active airbag system malfunction, as it can compromise your safety in the event of an accident. Have the issue diagnosed and repaired as soon as possible.

6. How much does it typically cost to repair the B1650 code related to the Occupant Classification System Malfunction in a Scion?

- Repair costs can vary depending on the specific cause of the issue, but they can range from a few hundred to over a thousand dollars, including parts and labor.

7. Can resetting the OBDII code B1650 in my Scion fix the Occupant Classification System Malfunction issue?

- Resetting the code may temporarily clear the warning lights, but it will not fix the underlying problem causing the malfunction. It's important to diagnose and repair the issue to ensure proper functionality.

8. Will disconnecting the car battery reset the B1650 code linked to the Occupant Classification System Malfunction in my Scion?

- Disconnecting the battery may clear the code temporarily, but it's not a permanent fix. The code is likely to reappear once the system detects the ongoing issue, so proper diagnosis and repair are necessary.

9. How long does it typically take to repair the B1650 OBDII code related to the Occupant Classification System Malfunction in a Scion?

- The repair time can vary depending on the cause of the issue and the complexity of the repair. It may take a few hours to a full day to diagnose and fix the problem properly.

10. Can a DIY enthusiast with basic automotive knowledge fix the B1650 code related to the Occupant Classification System Malfunction in a Scion?

- While some basic troubleshooting steps can be performed by a DIY enthusiast, due to the complexity and safety implications of airbag systems, it's best to consult a professional mechanic for accurate diagnosis and repair.

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