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B1123 Toyota Code - Occupant Classification System Malfunction

- Code Popularity: 5,608 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC B1123 Toyota?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Occupant classification system
  • Airbag sensor assembly center
  • Right front seat wire
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How to Fix the DTC B1123 Toyota?

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.

Search for B1123 Toyota Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1123 Toyota 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.

When is the Code Detected?

The B1123 code is recorder when a malfunction is detected in the occupant classification system.

What are Code Possible Symptoms?

  • Airbag Warning Light ON

Code B1123 Toyota Description

The occupant classification system circuit consists of the airbag sensor assembly center and the occupant classification system.

If the airbags sensor assy center receives signals from the occupant classification ECU, it determines whether or not the front passenger airbag assy and the front seat airbag assy sight should be operated.

OBDII Code B1123 Toyota - Occupant Classification System Malfunction - AutoCodes.com
B1123 Toyota Code - Occupant Classification System Malfunction

Need More Information on the Code?

Need more information on how to fix the B1123 Toyota code? Get Access to Factory Service Manuals

Information for Specific Toyota Models

Need Help with the Code?

Get the B1123 Toyota 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.

Code B1123 Toyota comments

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