B1773 Lexus Code - Belt Tension Sensor Circuit Malfunction
Quick Answer
The Seat Belt Tension Sensor Circuit consists of the Occupant Classification ECU and the Seat Belt Tension Sensor. Common causes include Faulty Front Seat Outer Belt Assembly Right (RH) (Seat Belt Tension Sensor), Front Seat Outer Belt Assembly Right harness is open or shorted, Front Seat Outer Belt Assembly Right 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
- B1773 Lexus indicates Belt Tension Sensor Circuit Malfunction.
- Common causes
- Common causes include Faulty Front Seat Outer Belt Assembly Right (RH) (Seat Belt Tension Sensor), Front Seat Outer Belt Assembly Right harness is open or shorted, Front Seat Outer Belt Assembly Right 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 B1773 Lexus Description
What are the Possible Causes of the DTC B1773 Lexus?
- Faulty Front Seat Outer Belt Assembly Right (RH) (Seat Belt Tension Sensor)
- Front Seat Outer Belt Assembly Right harness is open or shorted
- Front Seat Outer Belt Assembly Right circuit poor electrical connection
- Faulty Occupant Classification ECU
How to Fix the DTC B1773 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 B1773 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.
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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 B1773 Lexus Code
1. What are the common symptoms of OBDII code B1773 in a Lexus related to the Belt Tension Sensor Circuit Malfunction?
- Common symptoms include the illumination of the Check Engine Light, erratic behavior of the belt tension system, and potential issues with the vehicle's drivability.
2. What usually causes the OBDII code B1773 in a Lexus indicating a Belt Tension Sensor Circuit Malfunction?
- The code B1773 is typically triggered by a faulty belt tension sensor, damaged wiring or connectors in the sensor circuit, or issues with the sensor's signal to the vehicle's ECM.
3. How can I diagnose the OBDII code B1773 in my Lexus related to the Belt Tension Sensor Circuit Malfunction?
- Diagnosis involves using an OBDII scanner to retrieve the specific fault code, inspecting the belt tension sensor and its wiring for any visible damage, and testing the sensor's resistance and voltage output.
4. Are there any quick repair tips for addressing the OBDII code B1773 in a Lexus due to a Belt Tension Sensor Circuit Malfunction?
- Quick repair tips include checking and repairing any damaged wiring or connectors, replacing the belt tension sensor if faulty, and clearing the fault code to see if the issue recurs.
5. Can I drive my Lexus with the OBDII code B1773 indicating a Belt Tension Sensor Circuit Malfunction?
- It is generally not recommended to drive the vehicle with this fault code active, as it can lead to potential issues with the belt tension system and affect the overall performance and safety of the vehicle.
6. How much does it typically cost to repair the OBDII code B1773 in a Lexus related to the Belt Tension Sensor Circuit Malfunction?
- The cost of repair can vary depending on the extent of the issue, but it may involve expenses for parts such as the belt tension sensor and labor costs for diagnosis and replacement.
7. Is it possible to reset the OBDII code B1773 in a Lexus indicating a Belt Tension Sensor Circuit Malfunction without fixing the underlying issue?
- While you can clear the fault code using an OBDII scanner, it is not recommended to ignore the root cause, as it can lead to persistent problems with the belt tension system and potentially cause further damage.
8. How long does it typically take to repair the OBDII code B1773 in a Lexus related to the Belt Tension Sensor Circuit Malfunction?
- The repair time can vary based on the complexity of the issue and the availability of parts, but it may take anywhere from 1-3 hours to diagnose and replace the faulty components.
9. Are there any preventive maintenance steps to avoid encountering the OBDII code B1773 in a Lexus due to a Belt Tension Sensor Circuit Malfunction?
- Regular inspection of the belt tension sensor and its wiring, as well as addressing any unusual noises or behavior from the belt tension system, can help prevent issues that lead to this fault code.
10. Can a DIY enthusiast with some automotive knowledge fix the OBDII code B1773 in a Lexus related to the Belt Tension Sensor Circuit Malfunction?
- While some DIY enthusiasts may be able to diagnose and replace the belt tension sensor or address wiring issues, it is recommended to consult with a professional mechanic for proper diagnosis and repair to ensure the issue is resolved correctly.
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