AutoCodes.com | All About OBDII Engine Codes
AutoCodes - Lexus - B1786 Lexus

B1786 Lexus Code - Front Occupant Classification Sensor Right Collision Detection

- Code Popularity: 1,072 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
Share on Facebook   Share on Twitter   Share on Linkedin

What are the Possible Causes of the DTC B1786 Lexus?

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 Front Seat RH (Front Occupant Classification Sensor (RH))
  • Front Seat RH harness is open or shorted
  • Front Seat RH circuit poor electrical connection
  • Faulty Occupant Classification ECU
⚠ Does your Lexus have Safety Recalls? → Check here

How to Fix the DTC B1786 Lexus?

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.

Search for B1786 Lexus Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1786 Lexus 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 B1786 Lexus Description

The Diagnostic Trouble Code (DTC) B1786 is output when the Occupant Classification ECU receives a collision detection signal sent by the Front Occupant Classification Sensor Right (RH) when an accident occurs. DTC B1786 is also output when the Front Seat Assembly RH is subjected to a strong impact, even if an actual accident does not occur. However, when the Occupant Classification ECU outputs a collision detection signal, even if the vehicle is not in a collision, DTC B1786 can be cleared by performing the zero point calibration and sensitivity check. Therefore, when DTC B1786 is output, first perform the zero point calibration and sensitivity check.

OBDII Code B1786 Lexus - Front Occupant Classification Sensor Right Collision Detection - AutoCodes.com
B1786 Lexus Code - Front Occupant Classification Sensor Right Collision Detection

Need More Information on the Code?

Need more information on how to fix the B1786 Lexus code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1786 Lexus code diagnosed by a professional: Find a repair shop in your area

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 B1786 Lexus comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the B1786 Lexus code? Have you replaced any parts?
Any information is appreciated. Thanks