AutoCodes – Scion – B1877 Scion

B1877 Scion 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 Scion 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 245

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 Scion 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 Scion - Short to Ground in Passenger Side Front Seat Cushion Squib Circuit - AutoCodes.com — B1877 Scion 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 Scion?

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 Scion?

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 Scion 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 Scion code?

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

Need Help with the Code?

Get the B1877 Scion 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 Scion Code

1. What does the OBDII code B1877 mean on a Scion?

The code B1877 indicates a fault in the passenger side front seat cushion squib circuit, specifically a short to ground. This involves the airbag system where the "squib" refers to the part of the airbag that initiates deployment.

2. What symptoms might I notice if my Scion has the B1877 code?

Symptoms can include the airbag warning light illuminating on your dashboard and potentially the passenger airbag not deploying in the event of an accident.

3. What could cause the B1877 code to appear in a Scion?

Common causes include damaged wiring, faulty connectors, or a malfunction in the passenger seat airbag itself. It can also be triggered by moisture intrusion or corrosion affecting the circuit.

4. How can I diagnose the B1877 code in my Scion?

Diagnosis should start with a visual inspection of the wiring and connectors under the passenger seat to check for damage or loose connections. Using a multimeter to check for shorts to ground in the circuit can also help pinpoint the issue.

5. What steps should be taken to repair a Scion if it shows the B1877 code?

Repairing this code may involve replacing damaged wires or connectors, ensuring all connections are secure, or replacing the passenger seat airbag module if it is found to be defective.

6. Is it safe to drive a Scion with the B1877 code?

While the vehicle may operate normally for general driving, the safety concern regarding the non-functional passenger airbag makes it advisable to get the issue fixed as soon as possible to ensure passenger safety.

7. How urgent is it to fix a B1877 code on a Scion?

It is quite urgent to address this issue because it involves the airbag system, which is critical for passenger safety in the event of a collision.

8. Can a B1877 code clear itself if the fault was temporary in a Scion?

It is unlikely for this code to clear itself, as it often indicates a persistent issue within the airbag system's electrical circuit. A professional diagnostic and reset of the system by a technician are recommended.

9. What tools are needed to diagnose and repair the B1877 code on a Scion?

Typically, a multimeter for electrical testing and a scanner capable of interfacing with the vehicleâ€™s airbag system are required. Basic hand tools may be needed for accessing and repairing wiring or components.

10. Could other issues in a Scion trigger the B1877 code besides electrical faults?

While the most common cause is related to electrical faults, physical impacts or accidents that affect the passenger seat area could potentially damage the airbag components or wiring, thereby triggering this code.