B1933 Mazda Code - Air Bag Passenger Circuit Open Fault
Quick Answer
The Restraints Control Module (RCM) checks all of the Passenger Air Bag Module Circuits for faults. Common causes include Faulty Passenger Air Bag Module, Passenger Air Bag Module harness is open or shorted, Passenger Air Bag Module 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
- B1933 Mazda indicates Air Bag Passenger Circuit Open Fault.
- Common causes
- Common causes include Faulty Passenger Air Bag Module, Passenger Air Bag Module harness is open or shorted, Passenger Air Bag Module 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.
Code B1933 Mazda Description
What are the Possible Causes of the DTC B1933 Mazda?
- Faulty Passenger Air Bag Module
- Passenger Air Bag Module harness is open or shorted
- Passenger Air Bag Module circuit poor electrical connection
- Faulty Restraint Control Module (RCM)
How to Fix the DTC B1933 Mazda?
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 B1933 Mazda 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.
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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.
Frequently Asked Questions about B1933 Mazda Code
1. What does the OBDII code B1933 indicate on a Mazda?
- Code B1933 indicates a fault in the airbag system, specifically mentioning that there is an "Air Bag Passenger Circuit Open" condition in the passenger airbag circuit.
2. What are common symptoms of code B1933 in a Mazda?
- The most noticeable symptom is the airbag warning light on the dashboard being illuminated. There may not be any other noticeable symptoms affecting driving, but the passenger airbag might not deploy in the event of an accident.
3. What causes the OBDII code B1933 to appear on a Mazda?
- This code is typically triggered by issues such as a broken wire, loose connections, or faults in the passenger airbag module connectors. Corrosion or damage in the wiring harness can also be a cause.
4. How is the B1933 code diagnosed in a Mazda?
- Diagnosis involves using a scan tool to confirm the presence of the code, visually inspecting the airbag system's wiring and connectors for damage or disconnections, and checking the resistance in the passenger airbag circuit to identify open circuits.
5. What are the risks of driving a Mazda with the B1933 code active?
- Driving with this code active can be risky as it indicates that the passenger airbag may not deploy in the event of a crash, increasing the risk of injury to the passenger.
6. How can I fix the B1933 code on my Mazda?
- Repairing this code may involve reconnecting or replacing damaged connectors, repairing or replacing damaged wires in the passenger airbag circuit, or replacing the passenger airbag module if necessary.
7. Is it necessary to reset the airbag light after repairing the B1933 code in a Mazda?
- Yes, after the necessary repairs have been made, it is important to clear the code with an OBDII scanner and ensure the airbag light turns off, confirming that the system is functioning correctly.
8. Can I repair the B1933 code issue myself or should I see a professional?
- If you have experience with car electrical systems, you might manage simpler tasks like checking connectors. However, airbag system repairs can be complex and potentially hazardous, so it’s often recommended to seek assistance from a qualified professional.
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