B1166 LEXUS - Open In Curtain Shield Squib LH Circuit

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

B1166 LEXUS Possible Causes

  • Faulty Curtain Shield Squib Assembly (Left Side)
  • Curtain Shield Squib Assembly harness is open or shorted
  • Curtain Shield Squib Assembly circuit poor electrical connection
  • Faulty Airbag Sensor Assembly Center

First diagnose B1166 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 B1166 LEXUS code

    Labor: 1.0

    The cost of diagnosing the B1166 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.

B1166 LEXUS Possible Symptoms

  • Air Bag Warning Light ON

B1166 LEXUS Meaning

The Curtain Shield Squib (Left Side) circuit consists of the Airbag Sensor Assembly Center and the Curtain Shield Squib Assembly LH. The circuit instructs the Supplemental Restraint System (SRS) to deploy when deployment conditions are met. The Diagnostic Trouble Code (DTC) B1166 is recorded when an open circuit is detected in the Curtain Shield Squib LH circuit.
OBDII Code B1166 LEXUS - Open In Curtain Shield Squib LH Circuit - Engine-Codes.com

B1166 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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