AutoCodes – Lexus – B1877 Lexus

B1877 Lexus Code - Short to Ground in Passenger Side Front Seat Cushion Squib Circuit

Quick Answer

The Front Seat Cushion Squib Right (RH) Circuit consists of the Center Airbag Sensor Assembly and the Front Seat Airbag Sub-Assembly. Common causes include Faulty Front Seat Airbag Sub-Assembly (Front Seat Cushion Squib Right), Front Seat Airbag Sub-Assembly harness is open or shorted, Front Seat Airbag Sub-Assembly circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B1877 Lexus indicates Short to Ground in Passenger Side Front Seat Cushion Squib Circuit.
Common causes: Common causes include Faulty Front Seat Airbag Sub-Assembly (Front Seat Cushion Squib Right), Front Seat Airbag Sub-Assembly harness is open or shorted, Front Seat Airbag Sub-Assembly circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 330

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Dec 02, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1877 Lexus Description

The Front Seat Cushion Squib Right (RH) Circuit consists of the Center Airbag Sensor Assembly and the Front Seat Airbag Sub-Assembly. This circuit instructs the Supplemental Restraint System (SRS) to deploy when deployment conditions are met. The Diagnostic Trouble Code (DTC) is stored when a malfunction is detected in the Front Seat Cushion Squib Right (RH).

OBDII Code B1877 Lexus - Short to Ground in Passenger Side Front Seat Cushion Squib Circuit - AutoCodes.com — B1877 Lexus Code - Short to Ground in Passenger Side Front Seat Cushion Squib Circuit

What does this mean?

What are the Possible Causes of the DTC B1877 Lexus?

Faulty Front Seat Airbag Sub-Assembly (Front Seat Cushion Squib Right)
Front Seat Airbag Sub-Assembly harness is open or shorted
Front Seat Airbag Sub-Assembly circuit poor electrical connection
Faulty Center Airbag Sensor Assembly

How to Fix the DTC B1877 Lexus?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1877 Lexus code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B1877 Lexus code?

Need more information on how to fix the B1877 Lexus code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1877 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.

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1877 Lexus Code

1. What are the common symptoms of OBDII code B1877 in a Lexus related to the passenger side front seat cushion squib circuit?

The common symptoms include the airbag warning light illuminating on the dashboard and potential non-deployment of the passenger side airbag in case of an accident.

2. What could be the potential causes of OBDII code B1877 in a Lexus indicating a short to ground in the passenger side front seat cushion squib circuit?

Possible causes include damaged wiring, a faulty seat cushion squib unit, a poor electrical connection, or a short circuit within the circuit.

3. How can I diagnose OBDII code B1877 in a Lexus related to a short to ground in the passenger side front seat cushion squib circuit?

Diagnosis typically involves using a diagnostic scanner to retrieve the fault code, inspecting the wiring and connectors for damage, testing the seat cushion squib unit for continuity, and checking for any short circuits.

4. Is it safe to drive a Lexus with OBDII code B1877 indicating a short to ground in the passenger side front seat cushion squib circuit?

It is not recommended to drive the vehicle with this fault code present, as the passenger side airbag may not deploy in the event of a collision, potentially compromising passenger safety.

5. Can I repair OBDII code B1877 related to a short to ground in the passenger side front seat cushion squib circuit on my own?

Repairing this issue may require advanced knowledge of automotive electrical systems. It is recommended to seek assistance from a qualified mechanic or dealership to properly diagnose and repair the problem.

6. How much does it typically cost to repair OBDII code B1877 in a Lexus due to a short to ground in the passenger side front seat cushion squib circuit?

The cost of repair can vary depending on the exact cause of the issue, but it may involve replacing damaged wiring, repairing connectors, or replacing the seat cushion squib unit. Costs can range from a few hundred to over a thousand dollars.

7. Can resetting the OBDII code B1877 related to the passenger side front seat cushion squib circuit fix the issue?

Simply resetting the fault code may temporarily turn off the warning light, but it will not address the underlying problem causing the short to ground in the circuit. The issue should be properly diagnosed and repaired to ensure safety.

8. Are there any safety precautions to consider when working on OBDII code B1877 in a Lexus associated with the passenger side front seat cushion squib circuit?

It is important to disconnect the vehicle's battery before working on any airbag-related components to prevent accidental deployment. Additionally, following proper safety procedures outlined in the vehicle's service manual is crucial.

9. What are the implications of ignoring OBDII code B1877 in a Lexus linked to a short to ground in the passenger side front seat cushion squib circuit?

Ignoring this fault code can pose a risk to passenger safety in the event of a collision, as the passenger side airbag may not deploy as intended. It is crucial to address this issue promptly to ensure the proper functioning of the airbag system.

10. Is it possible for OBDII code B1877 in a Lexus regarding a short to ground in the passenger side front seat cushion squib circuit to recur after repair?

If the root cause of the issue is not properly addressed during repair, there is a possibility that the fault code may recur. It is essential to ensure thorough diagnosis and repair to prevent the problem from reoccurring.