B1143 LEXUS - Door Side Airbag Sensor Malfunction

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What does this mean?

B1143 LEXUS Possible Causes

  • Faulty Door Side Airbag Sensor (Right Side)
  • Door Side Airbag Sensor (Right Side) harness is open or shorted
  • Door Side Airbag Sensor (Right Side) circuit poor electrical connection
  • Faulty Airbag Sensor Assembly

First diagnose B1143 LEXUS code

    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 terminals.

Cost of diagnosing the B1143 LEXUS code

    Labor: 1.0

    The cost of diagnosing the B1143 LEXUS code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

B1143 LEXUS Possible Symptoms

  • Air Bag Warning Light ON

B1143 LEXUS Meaning

The Door Side Airbag Sensor (Right Side) circuit consists of the airbag sensor assembly and Door Side Airbag Sensor (Right Side). The Diagnostic Trouble Code (DTC) B1143 is recorded when a malfunction is detected in the Door Side Airbag Sensor (Right Side) circuit.
OBDII Code B1143 LEXUS - Door Side Airbag Sensor Malfunction - Engine-Codes.com

B1143 LEXUS More Information

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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.

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