AutoCodes – Generic – B1408

B1408 Code - Passenger Side Curtain Deployment Control 1 Circuit

Quick Answer

The Restraint Control Module (RCM) analyzes the deployment loop resistance to determine if a fault exists. Common causes include Faulty Passenger Side Curtain, Passenger Side Curtain harness is open or shorted, Passenger Side Curtain 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: B1408 indicates Passenger Side Curtain Deployment Control 1 Circuit.
Common causes: Common causes include Faulty Passenger Side Curtain, Passenger Side Curtain harness is open or shorted, Passenger Side Curtain 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 26,148

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 Apr 04, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B1408 Description

The Restraint Control Module (RCM) analyzes the deployment loop resistance to determine if a fault exists. The value displayed in the PID is the deployment loop resistance measured by the RCM. If the value displayed is lower or higher than the desired range, the RCM can set a Diagnostic Trouble Code (DTC). As the deployment loop resistance drifts farther outside the desired range, the chance for a DTC increases. Small variations in resistance can occur due to the effect of road vibrations on terminal fit. Crimps and terminals can be affected by stress and harness movement and can cause an increase in resistance due to wire strain. These variables can result in an intermittent fault. For this reason, the test requires the PID value to be within the desired range before the fault is considered repaired, regardless if the module is reporting an on-demand DTC at the time of diagnosis. Following this direction helps make sure that minor changes in resistance do not create a repeat concern.

OBDII Code B1408 - Passenger Side Curtain Deployment Control 1 Circuit - AutoCodes.com — B1408 Code - Passenger Side Curtain Deployment Control 1 Circuit

What does this mean?

What are the Possible Causes of the DTC B1408?

Faulty Passenger Side Curtain
Passenger Side Curtain harness is open or shorted
Passenger Side Curtain circuit poor electrical connection
Faulty Restraint Control Module (RCM)

How to Fix the DTC B1408?

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 does this mean?

Code Tech Notes

B1408:11 Passenger Side Curtain Deployment Control 1 Circuit Short to Ground
B1408:12 Passenger Side Curtain Deployment Control 1 Circuit Short to Battery
B1408:13 Passenger Side Curtain Deployment Control 1 Circuit Open
B1408:1A Passenger Side Curtain Deployment Control 1 Circuit Resistance Below Threshold

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1408 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 B1408 code?

Need more information on how to fix the B1408 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1408 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1408 Ford — Passenger Side Curtain Deployment Control 1 Circuit
B1408 Lincoln — Passenger Side Curtain Deployment Control 1 Circuit
B1408 Mercury — Passenger Side Curtain Deployment Control 1 Circuit
B1408 Scion — Meter EEPROM Circuit
B1408 Toyota — Meter EEPROM Circuit

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 B1408 Code

1. What are common symptoms of OBDII code B1408 (Passenger Side Curtain Deployment Control 1 Circuit)?

- Common symptoms may include the airbag warning light illuminated on the dashboard, non-deployment of the passenger side curtain airbag during a collision, and potential diagnostic trouble codes related to the airbag system.

2. What are possible causes of OBDII code B1408?

- The code B1408 can be triggered by issues such as a faulty passenger side curtain airbag module, damaged wiring or connectors in the deployment circuit, or a problem with the airbag control module.

3. How can I diagnose OBDII code B1408?

- Diagnosis typically involves using a scan tool to retrieve the specific fault code, inspecting the wiring and connectors associated with the passenger side curtain airbag system, and conducting tests to pinpoint the exact cause of the circuit malfunction.

4. Can I still drive my vehicle with OBDII code B1408 present?

- It is not recommended to drive the vehicle with an active airbag fault code, as the passenger side curtain airbag may not deploy in the event of a collision, potentially compromising occupant safety.

5. How should I repair OBDII code B1408?

- Repairing the code B1408 may involve repairing or replacing damaged wiring and connectors, replacing the passenger side curtain airbag module if necessary, and clearing the fault code from the airbag control module using a scan tool.

6. Are there any safety precautions to consider when working on OBDII code B1408?

- Prior to working on the airbag system, it is crucial to disconnect the vehicle's battery and wait for at least 10 minutes to allow any residual electrical charge to dissipate. This helps prevent accidental deployment of the airbags.

7. How much does it typically cost to repair OBDII code B1408?

- The cost of repairing OBDII code B1408 can vary depending on the exact cause of the issue, the extent of the repairs needed, and labor rates in your area. It is recommended to obtain quotes from reputable automotive repair shops.

8. Can I reset OBDII code B1408 without fixing the underlying issue?

- While you can clear the fault code using a scan tool, it is crucial to address the root cause of the problem to ensure the proper functioning of the passenger side curtain airbag system and overall safety of the vehicle.

9. Will OBDII code B1408 cause my vehicle to fail a state inspection?

- In many states, a malfunctioning airbag system can lead to a failed state inspection due to safety concerns. It is advisable to address and repair OBDII code B1408 promptly to pass the inspection.

10. Can a DIY enthusiast repair OBDII code B1408 at home?

- Repairing OBDII code B1408 may require specialized tools and knowledge of airbag systems. While some DIY enthusiasts may have the skills to diagnose and address simple issues, it is recommended to consult with a professional technician for complex airbag repairs.