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B1166 Toyota Code - Open In Curtain Shield Squib LH Circuit

- Code Popularity: 4,581 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC B1166 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.
  • 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
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How to Fix the DTC B1166 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.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1166 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.

What are Code Possible Symptoms?

  • Air Bag Warning Light ON

Code B1166 Toyota Description

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 Toyota - Open In Curtain Shield Squib LH Circuit - AutoCodes.com
B1166 Toyota Code - Open In Curtain Shield Squib LH Circuit

Need More Information on the Code?

Need more information on how to fix the B1166 Toyota code? Get Access to Factory Service Manuals

Need Help with the 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.

Code B1166 Toyota comments

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