Engine-Codes - Toyota - B1166 Toyota

B1166 Toyota Code - Open In Curtain Shield Squib LH Circuit

- Code Popularity: 3,795 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

What are the Possible Causes of the Code B1166 Toyota?

  • 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

How to Fix the B1166 Toyota Code?

Start by checking 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.

What is the Cost to Diagnose the Code B1166 Toyota?

Labor: 1.0

The cost to diagnose the B1166 Toyota code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

Does your Toyota have Safety Recalls? → Check here

What are Code B1166 Toyota Possible Symptoms?

  • Air Bag Warning Light ON

What Does the B1166 Toyota Code Mean?

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.

B1166 Toyota Code - Open In Curtain Shield Squib LH Circuit

Need more Information on the B1166 Toyota 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.