AutoCodes - OBDII Code List - B1123 LEXUS

B1123 LEXUS - Occupant Classification System Malfunction

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3
Table of contents

B1123 LEXUS Possible Causes

  • Occupant classification system
  • Airbag sensor assembly center
  • Right front seat wire

How do I fix code B1123 LEXUS?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
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Cost of diagnosing the B1123 LEXUS code

Labor: 1.0

The cost of diagnosing the B1123 LEXUS code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops 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.

Possible Symptoms

  • Airbag Warning Light ON

B1123 LEXUS 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 Lexus - Occupant Classification System Malfunction - AutoCodes.com

More Information

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

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.

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Repair Importance Level: 3
 
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