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AutoCodes - Generic - B1650

B1650 Code - Occupant Classification System Malfunction

- Code Popularity: 28,122 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC B1650?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Occupant Detection ECU
  • Occupant Detection ECU harness is open or shorted
  • Occupant Detection ECU circuit poor electrical connection
  • Faulty Center Airbag Sensor Assembly
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How to Fix the DTC B1650?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1650 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Airbag Warning Light ON

Code B1650 Description

The Occupant Classification System circuit consists of the Center Airbag Sensor Assembly and the Occupant Detection ECU. If the Center Airbag Sensor Assembly receives signals from the Occupant Detection ECU, it determines whether the Front Passenger Airbag Assembly, the Front Seat Airbag Assembly Right, and the Front Seat Belt Assembly should be operated. The B1650 code is recorded when a malfunction is detected in the Occupant Classification System circuit.

OBDII Code B1650 - Occupant Classification System Malfunction - AutoCodes.com
B1650 Code - Occupant Classification System Malfunction

Need More Information on the Code?

Need more information on how to fix the B1650 code? Get Access to Factory Service Manuals

Information for Specific Makes

Need Help with the Code?

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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.

Code B1650 comments

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