B1661 Lexus Code - Roll Over Cut Off Indicator Malfunction
Quick Answer
The Curtain Shield Airbag Cutoff Switch is a mechanism that operates both the right and left sides of the Curtain Shield Airbag and the Front Seat Outer Belt when the Center Airbag Sensor detects a roll-over. Common causes include Faulty Combination Meter Assembly, Faulty Curtain Shield Airbag Cutoff Switch, Combination Meter Assembly harness is open or shorted. 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
- B1661 Lexus indicates Roll Over Cut Off Indicator Malfunction.
- Common causes
- Common causes include Faulty Combination Meter Assembly, Faulty Curtain Shield Airbag Cutoff Switch, Combination Meter Assembly harness is open or shorted.
- 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 B1661 Lexus Description
What are the Possible Causes of the DTC B1661 Lexus?
- Faulty Combination Meter Assembly
- Faulty Curtain Shield Airbag Cutoff Switch
- Combination Meter Assembly harness is open or shorted
- Combination Meter Assembly circuit poor electrical connection
- Faulty Center Airbag Sensor
How to Fix the DTC B1661 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 B1661 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 B1661 Lexus Code
1. What are common symptoms of OBDII code B1661 in a Lexus related to the Roll Over Cut Off Indicator Malfunction?
- Common symptoms include the Roll Over Cut Off Indicator light staying illuminated or flashing on the dashboard.
2. What can cause the Roll Over Cut Off Indicator Malfunction in a Lexus triggering OBDII code B1661?
- Possible causes include a malfunctioning roll over sensor, damaged wiring, or a faulty indicator light circuit.
3. How serious is the Roll Over Cut Off Indicator Malfunction OBDII code B1661 in a Lexus?
- This issue is not critical to the vehicle's immediate operation, but it is important for safety systems in the event of a rollover accident.
4. Can a DIY enthusiast repair the Roll Over Cut Off Indicator Malfunction triggering OBDII code B1661 in a Lexus?
- Repairing this issue may require advanced diagnostic tools and knowledge, so it is recommended to seek professional help for an accurate diagnosis and repair.
5. Is it safe to drive a Lexus with the Roll Over Cut Off Indicator Malfunction and OBDII code B1661?
- It is generally safe to drive the vehicle, but it is crucial to address the underlying issue promptly to ensure proper function of safety systems in case of a rollover event.
6. How can I troubleshoot the Roll Over Cut Off Indicator Malfunction OBDII code B1661 in my Lexus?
- Start by checking the indicator light, inspecting the wiring related to the roll over sensor, and ensuring the sensor is functioning correctly.
7. Are there any recalls or service bulletins related to the Roll Over Cut Off Indicator Malfunction OBDII code B1661 in Lexus vehicles?
- It is advisable to check with a Lexus dealership or online resources for any relevant recalls or service bulletins addressing this specific issue.
8. Can a faulty battery or alternator cause the Roll Over Cut Off Indicator Malfunction OBDII code B1661 in a Lexus?
- While a faulty battery or alternator can cause various electrical issues, they are unlikely to directly trigger the Roll Over Cut Off Indicator Malfunction.
9. How much does it typically cost to repair the Roll Over Cut Off Indicator Malfunction OBDII code B1661 in a Lexus?
- Repair costs can vary depending on the exact cause of the issue, but it is recommended to budget for diagnostic fees and potential parts replacement.
10. Will resetting the OBDII system clear the Roll Over Cut Off Indicator Malfunction code B1661 in a Lexus?
- Resetting the OBDII system may temporarily clear the code, but it is essential to address the underlying issue to prevent the code from reappearing.
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