RX400h

While I am not currently using a car cover, I've found that the best ones have a UV-resistant polyurethane layer on the outside, and a soft layer on the inside. I also recommend the covers that have side view mirror "ears" which deter high winds from blowing off the cover. 

With his type of cover, you wash it while it is on the car. 

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Congratulations on your new 2007 Lexus IS250! It’s always exciting to explore ways to enhance your car’s performance. While the IS250 isn’t a powerhouse out of the box, there are some cost-effective modifications you can consider to give it a bit more oomph. Let’s dive into some options:

1. Bolt-On Modifications:

   • Intake: Upgrading your air intake system can improve airflow to the engine, resulting in a modest power increase. Look for a high-quality aftermarket intake that fits your budget.
   • Exhaust: A less restrictive exhaust system can help the engine breathe better and potentially add a few horsepower. Consider a cat-back exhaust system or even just a performance muffler.
   • Headers: Upgrading to performance headers can improve exhaust flow and contribute to additional power gains.

2. Supercharging or Turbocharging:

   • While these options may not be dirt cheap, they can provide significant power increases. Look for supercharger or turbocharger kits specifically designed for the IS250. Keep in mind that professional installation is crucial for reliability.

3. Nitrous Oxide (NOS):

   • Nitrous injection is a quick way to add temporary horsepower. It’s relatively affordable, but you’ll need to refill the nitrous bottle periodically. Be cautious and follow safety guidelines when using NOS.

4. Weight Reduction:

   • Improving your power-to-weight ratio can make your car feel more responsive. Consider shedding unnecessary weight by:
     • Using lighter wheels and tires.
     • Removing the spare tire and jack (if you’re okay with that).
     • Opting for a smaller, lightweight battery.

5. Engine Swap:

   • If you’re open to more involved modifications, consider swapping in a different engine. The IS250 shares its platform with the IS350, so an engine swap could give you the desired power boost. However, this option requires significant time, effort, and expertise.

Since you're in CA, make sure that what you do is smog legal.

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1. Suspension Components:

   • Loose or worn suspension components can lead to clunking noises. Although the Toyota dealership inspected the front end, it’s possible that certain parts were overlooked.
   • Consider checking the following components:
     • Control Arms: Specifically, the upper control arm on the driver’s side. If it’s worn or has loose bolts, it could cause the described noise.
     • Ball Joints: Inspect the ball joints for any signs of wear, including grease leakage or torn boots.
     • Endlinks: Even though you’ve replaced them, double-check their tightness.
     • Struts and Springs: Ensure they are properly secured and not causing any play.
     • Shock Absorbers: Verify that they are functioning correctly.
   • If you haven’t already, consider having an independent alignment shop mechanic reinspect these components.

2. Wheel-Related Issues:

   • The hopping sensation you described might be related to the front passenger wheel. Here are some possibilities:
     • Wheel Bearing: A worn or damaged wheel bearing could cause irregular movement.
     • Tire Issues: Check for any bulges, flat spots, or uneven wear on the tires. Also, ensure proper tire pressure.
     • Wheel Balance: Even though the wheels were balanced, it’s worth rechecking.
     • Bent Wheel: A bent wheel can cause vibrations and hopping. Inspect the wheel for any visible damage.
     • Brake Caliper: You mentioned the possibility of the brake caliper sticking. Ensure it’s functioning correctly and not causing any issues.
     • Parking Brake: Verify that the parking brake isn’t engaging unintentionally.
   • Swapping the front tires (moving them to the rear and vice versa) might help identify any tire-related issues.

3. Additional Considerations:

   • Road Conditions: Pay attention to whether the clunking occurs more frequently on rough roads or specific surfaces.
   • Temperature: Sometimes temperature changes can affect components, causing noises.
   • Alignment: Ensure the wheels are properly aligned.
   • Transmission or Drivetrain: Although less likely, issues in these areas could also contribute to the symptoms you’ve described.

4. Diagnostic Tools:

   • Since you don’t have a nearby Lexus dealership, consider investing in an OBD-II scanner. It can help you read error codes and diagnose potential issues.
5. Finally, if no one can figure this out, you may want to investigate your state's Lemon Law to see if your situation qualifies.

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It’s unfortunate that your key fob stopped working, and now you’re dealing with a weak battery. Let’s explore the possible correlation between these issues:

1. Key Fob and Battery Drain:

   • A key fob communicates with your car to perform functions like locking/unlocking doors, starting the engine, and activating the alarm. When you press a button on the key fob, it sends a signal to the car.
   • Consumer Reports explains that while the key fob does cause a slight drain on the battery, it generally won’t completely drain a healthy car battery. The key fob’s constant communication is a factor, but an old or aging car battery is more likely the root cause.
   • In some cases, if the key fob battery is old or defective, it may send a weak signal to the car, leading to continuous attempts to receive the signal. This can contribute to battery drain.

2. Car Battery Health:

   • Your car’s battery strength directly affects the key fob’s performance. A robust car battery ensures optimal operation of electronic systems, including the key fob receiver. Conversely, a weak car battery can result in decreased key fob range or responsiveness.

3. Next Steps:

   • Before replacing anything, consider these steps:
     • Check the Car Battery: Have your car battery tested. If it’s weak or old, replacing it might solve both issues.
     • Inspect Key Fob Battery: Replace the key fob battery if it’s worn out. It’s an inexpensive fix.
     • Address Key Fob Buttons: If the buttons are worn out, consider repairing or replacing the key fob.
     • Look for Parasitic Drain: If the battery continues to drain, there might be a parasitic drain (e.g., faulty wiring, malfunctioning components). A mechanic can diagnose this.

Remember, I’m not a mechanic, but these general guidelines might help you avoid unnecessary expenses. If you’re unsure, consult a professional to diagnose the specific issues in your car. 

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It seems you’ve already taken steps to address the issue by replacing the fuel level sending units. However, if you’re still experiencing inaccuracies with your fuel gauge, here are some suggestions:

1. Check the Fuel Level Sensor: The fuel gauge’s accuracy heavily relies on the fuel level sensor (also known as the fuel sender). Ensure that it’s functioning correctly. If not, consider replacing it.

2. Inspect Wiring and Connections: Faulty wiring or poor connections can lead to inaccurate readings. Examine the wiring harness and connectors associated with the fuel level sensor. Repair or replace any damaged components.

3. Fuel Tank Inspection: Sometimes debris or sediment can accumulate in the fuel tank, affecting the fuel gauge’s accuracy. Consider having the fuel tank inspected and cleaned.

4. Calibration: If you’ve replaced the fuel level sensor, ensure it’s properly calibrated. Incorrect calibration can lead to inaccurate readings.

Now, regarding refurbished fuel gauges, you have a few options:

• eBay: You can explore eBay for used or refurbished fuel gauges for your 1999 Lexus GS300. They often have a variety of individual gauges available.

• OEM Parts: For genuine parts, consider checking LexusPartsNow.com. They offer wholesale-priced OEM Lexus GS300 fuel sending units. Specifically, the Lexus GS300 Fuel Level Sensor (Gage Assy, Fuel Sender) is available for $112.15 (MSRP: $148.06). This part is guaranteed by Lexus’s factory warranty.

Remember to verify compatibility with your specific model year (1999) when purchasing any replacement parts. If you’re uncertain, consult your vehicle’s shop manuals or seek professional assistance.

Hopefully, these steps and options will help resolve the fuel gauge issue in your Lexus GS300.

Do you have access to the wiring diagram? I agree that it is likely that the fuse should be there.

Hello, Ami.

So you took your vehicle to the dealership, they analyzed it and could not discover the problem. Yet they want you to take it back?

What are they intending to do differently?

You may want to call the Lexus customer service number:

1. Phone: You can call Lexus Customer Service at 1 (800) 255-3987¹. They are available Monday to Friday from 5 a.m. to 5 p.m. PT.

On 3/6/2024 at 8:53 AM, RachWeber45 said:

I just recently bought a 2007 Lexus Rx 350 drives great. Only code that came up before purchase was a traction control (VSC) which is not that big of a deal. I take it to get smogged and it failed. The report says check engine light has been tampered with because it doesn’t come on at all. I had a mechanic take a look and he pulled out the cluster and it didn’t look like anything was amiss. There is no actual bulb it’s just a circuit board. All the wires are intact. He was baffled as to how someone could have made it to where only the check engine light doesn’t come on. Every other light works. Can anyone give me any input? TIA.

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It’s interesting that your 2007 Lexus RX 350 has a check engine light issue. While I can’t diagnose the specific problem, I can offer some general insights:

1. Check Engine Light (CEL) Tampering: If the smog report indicates that the check engine light has been tampered with, it’s essential to address this issue. Tampering with the CEL can lead to a failed smog test.

2. No Bulb, Just a Circuit Board: The absence of an actual bulb for the check engine light suggests an electrical issue. The check engine light typically illuminates when the car’s onboard computer detects a fault in the engine or emissions system. Since the wires appear intact, it’s puzzling why only the check engine light is affected.

3. Possible Causes:

   • Faulty Bulb or LED: Even though there’s no physical bulb, there might be an LED or other light source on the circuit board. It could be malfunctioning.
   • Faulty Sensor or Wiring: The check engine light relies on various sensors and wiring. A faulty sensor (such as an oxygen sensor) or damaged wiring could prevent the light from illuminating.
   • ECU (Engine Control Unit) Issue: The ECU manages the check engine light. If it’s not sending the signal to illuminate the light, there could be an issue with the ECU itself.
   • Previous Owner Modifications: Sometimes previous owners modify wiring or disable lights intentionally. It’s possible someone altered the system to avoid addressing an underlying issue.

4. Next Steps:

   • Professional Diagnosis: Consider taking your Lexus to a certified mechanic or dealership. They can perform a thorough diagnostic scan to identify any stored trouble codes and assess the system.
   • Resetting the Light: If the issue is resolved, the mechanic can reset the check engine light. However, ensure that the underlying problem is genuinely fixed.
   • Legal Implications: Tampering with emissions-related systems can have legal consequences. Ensure the issue is resolved correctly to comply with regulations.

Remember that tampering with emissions systems can impact both performance and environmental compliance. Seek professional assistance to diagnose and rectify the issue. 

Hello, Mike.

You may want to check with a Lexus dealership parts department person.

On 3/10/2024 at 12:47 PM, HD75 said:

The D light in the instrument cluster is out.  I cannot find any info on replacing the bulb.  I have been able to remove the instrument cluster and remove the cover to the circuit board, but can’t figure out how to get to the bulb.  I found instructions for the first gen RX but the 2004 isn’t the same.  

 

The second issue is cruise has stopped working.  The indicator light on the dash illuminates but it will not set.  
 

Any suggestions, etc. are greatly appreciated. 

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1. Remove the Instrument Cluster:

   • Remove the 2 screws at the top of the black bezel around the cluster.
   • Pull out the trim piece on the left of the steering wheel (the one housing the seat memory switch).
   • Pull out the trim piece around the key.
   • Tilt the steering wheel all the way down.
   • Start from the bottom and pull out the black bezel around the cluster.
   • Remove the 2 screws holding the cluster in place (located on the side of the cluster).
   • Pull the cluster out enough to unplug the 3 connectors.
   • Carefully remove the cluster from the car.

2. Access the Bulb:

   • Lay the cluster face down on a soft towel.
   • Remove the white plastic cover on the back by unscrewing the 8 gold-colored screws.
   • Turn the cluster over and locate the 3 black and 2 green little cap-looking things where the gear selector letters are.
   • These are the bulbs. Simply unscrew them to remove.

3. Replace the Bulb:

   • You may swap the park light bulb for the drive bulb, or you can order a new one in advance.
   • Put everything back together in reverse order.

Which of your vehicles?

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he issue you’re experiencing with your Lexus GX470 could be due to a few reasons:

1. Faulty Door Sensor: The door sensor might be faulty or jammed. This can cause the car to incorrectly detect that the door is open even when it’s closed.

2. Latch Issue: There could be an issue with the door latch not fully engaging. This can sometimes happen with the trunk lid. It might look closed because it’s heavy, but if it’s not fully latched, the car might still detect it as open.

3. Wiring or CPU Problem: If the door lights work correctly but the dash “Door Open” indicator is still on, then it could be some type of wiring or CPU problem².

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It seems like you’re dealing with multiple issues here. Let’s break them down:

1. Speakers: The issue with your speakers could be due to a problem with the wiring or the amplifier. It’s also possible that the speaker failure is related to the work done on the gear shift box, especially if any wiring was disturbed during the process.

2. Engine shutting off: This could be due to a variety of reasons. It could be a problem with the fuel delivery system, the ignition system, or even the engine control unit (ECU). A faulty speed sensor could cause the engine to shut off. It’s also possible that the problem is related to the transmission or speed sensors, especially considering the recent work on the gear shift box.

3. Check Engine and TRAC OFF lights: The flashing check engine light is usually a sign of a serious problem that should be addressed immediately. It’s often associated with engine misfires which can cause damage over time. The TRAC OFF light indicates that the traction control system is not actively engaged. This could be due to a problem with the system itself, or it could be a side effect of another issue, such as a problem with the engine or transmission.

4. Speedometer fluctuation: This could be due to a faulty speed sensor or a problem with the instrument cluster itself.

Given the complexity of these issues, I would recommend taking your car to a professional mechanic for a thorough diagnosis. They have the tools and expertise to accurately identify and fix these problems. Please remember that continuing to drive with these issues could potentially cause further damage to your vehicle. It’s best to get them addressed as soon as possible.

Hello, Matt.

Can you clarify what you mean by "the gas gauge and fuel gauge are flip under the needle"?

18 hours ago, Abe Scott said:

    I have seen tutorials for changing the VVT solenoid, but no one has ever mentioned the VVT position sensor. Does it ever go bad? If so, how difficult is it to replace? 

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The Variable Valve Timing (VVT) system in your 1999 Lexus LS400 includes components such as the VVT solenoid, also known as the Oil Control Valve (OCV), and the camshaft position sensor. While the VVT solenoid is often discussed in DIY tutorials, the camshaft position sensor is less frequently mentioned. However, it can fail and cause your vehicle to crank without starting or die intermittently¹.

As for the difficulty of replacement, it can vary. The process typically involves unplugging the connector from the sensor and removing it from its location on the engine. However, the exact steps can depend on the specific location and design of the sensor in your vehicle. If you’re not comfortable doing this yourself, it may be best to have a professional handle it.

As for the VVT system malfunctioning, it could be due to various factors. It could be narrowed down to three possible components: the Engine Control Module (ECM), the Oil Control Valve (OCV), or the VVT Controller. Cleaning the oil control valves has been reported to solve the issue in some cases

17 hours ago, diedroopy said:

i switched out the shifter piece, the car runs great, but i’m still having these issues where the car shuts off and the speedometer moves up and down in park before shutting off! any idea on what this could be? additionally the trac off light turns on and off 

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The issues you’re experiencing with your 1996 Lexus LS400 could be due to a variety of factors. Here are some possibilities:

1. Speedometer moving up and down: This could be due to a faulty shift solenoid, transmission speed sensors, or issues with the power supply boards on the back of the dash console. It’s also possible that the speedometer cable is broken².

2. Car shutting off: This could be due to a problem with the idle speed control valve or issues with the ground contacts from the battery post to the frame.

3. Trac off light turning on and off: This could be due to a malfunctioning traction control system. Common causes for this issue include broken MAF sensors, loose gas caps, bad oxygen sensors, spark plugs, and catalytic converters. It could also be due to low brake fluid levels or worn-out brake pads.

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The range of an electric or hybrid vehicle can be influenced by several factors, including driving conditions, climate, and the vehicle’s state of health. Here are a few suggestions that might help you achieve the full 37 miles of range on your 2024 Lexus 450H+:

1. Charging Infrastructure: Ensure you’re using the appropriate charging infrastructure. The RX 450h+ is equipped with a Level 1 vehicle charging cable for 120V outlets. However, at 240V, it can be fully charged in approximately 2.5 hours using the standard 6.6 kW Onboard Charger¹. If you’re not already using a Level 2 charger, you might want to consider upgrading.

2. Driving Habits: Your driving habits can significantly impact the vehicle’s range. Aggressive driving, high speeds, and frequent short trips can reduce the range. Try to maintain a steady speed and avoid hard acceleration or braking when possible.

3. Climate Control: Using the heater or air conditioning can also reduce the range. If possible, pre-condition the vehicle while it’s still plugged in to reduce the energy used for climate control while driving.

4. Vehicle Maintenance: Regular maintenance is essential for keeping your vehicle in top condition. Ensure your vehicle’s software is up-to-date, the tires are properly inflated, and the vehicle is serviced regularly according to the manufacturer’s recommendations.

If you’ve tried these suggestions and are still not achieving the full range, it might be a good idea to contact a Lexus service center for further assistance. They can check if there’s a problem with the vehicle’s battery or charging system. Please note that real-world conditions may cause the actual range to vary from the manufacturer’s stated range

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The Denso Iridium SK20R11 spark plugs you currently have are indeed a good choice for your 2000 RX300. The OEM part number 9008091180 you found online corresponds to these plugs¹.

As for the 4-digit number, it appears that the Denso Iridium SK20R11 spark plugs are also referred to as 3297. This might be the number you’ve seen in some places.

When ordering from Rockauto or any other online store, it’s important to ensure that the spark plugs you choose are compatible with your vehicle. You can do this by checking the product details or using the website’s compatibility tool if one is available.

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I’m sorry to hear about the issues you’re experiencing with your 1996 Lexus LS400. Let’s break down the situation and explore some possible causes:

1. Shifter Lever and Plastic Breakage:

   • The broken shifter lever could indeed be related to the problems you’re encountering. If the plastic inside the shifter assembly is damaged, it may affect the proper engagement of gears, including the “Park” position.
   • Inspect the shifter mechanism carefully. If the plastic components are broken or misaligned, it could cause issues with gear selection and park lock.

2. Speedometer and RPM Issues:

   • The speedometer not working properly could be due to various factors:
     • Speed Sensor: The speed sensor on the transmission or at the wheels might be faulty. These sensors provide input to the speedometer.
     • Wiring: Check for damaged or loose wiring related to the speedometer.
     • Instrument Cluster: There could be issues with the instrument cluster itself (e.g., faulty stepper motor, circuit board connections).
   • The RPM drop could be related to the same issues affecting the speedometer. Additionally, consider checking the throttle body, spark plugs, and air filter as they can impact engine performance.

3. Key Stuck and Engine Shutdown:

   • The key not coming out could be related to the shifter not being in the correct position (e.g., not fully in “Park”).
   • The engine shutting off unexpectedly might be due to electrical issues caused by the broken shifter lever or other related components.

4. Next Steps:

   • Inspect the Shifter: Reassemble the center console and ensure the shifter lever is functioning correctly. Make sure it engages properly in each gear, especially “Park.”
   • Check Speed Sensor: Test the speed sensor on the transmission (as you mentioned) and verify its output.
   • Inspect Wiring: Look for damaged wires or loose connections related to the speedometer and RPM.
   • Consider Professional Help: If the issues persist, consult a mechanic or a Lexus specialist to diagnose and address the specific problems.

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1. Flickering Dashboard Lights or Headlights:

   • When the alternator overcharges, it can cause the headlights or dashboard lights to flicker. The excessive voltage coming through the system leads to this phenomenon.
   • However, this symptom alone doesn’t pinpoint whether the alternator is producing too much or too little charge. We need to consider other signs as well.

2. Brighter Lights Than Usual:

   • An overcharging alternator makes the lights in your vehicle significantly brighter than usual. This effect applies to headlights, taillights, dashboard lights, and any other illuminated components.
   • Conversely, if the alternator were underperforming, you’d notice overall dimmer lights.

3. Dashboard Warning Lights:

   • If your car’s alternator is overcharging, you’ll likely see a battery light on your dashboard. Sometimes, the check engine light may also illuminate.
   • Modern vehicles equipped with an OBD-II system might display a charging system code (such as P2504 – Charging System Voltage High).
   • Keep in mind that this code could indicate issues beyond just the alternator, such as voltage regulator problems, battery corrosion, or electrical shorts¹.

Now, let’s explore potential causes and solutions:

• Voltage Regulator Issues:

  • The voltage regulator is directly responsible for controlling the alternator’s voltage output. A faulty regulator can lead to overcharging.
  • Consider checking the voltage regulator’s functionality or replacing it if needed.

• Wiring Problems:

  • Damaged alternator wiring or bad grounds can affect the charging system.
  • Inspect all connections, including ground wires, to ensure they’re solid and free from corrosion.

• Battery Sensor or ECM Trouble:

  • Sometimes, an issue with the battery sensor or the car’s electronic control module (ECM) can cause overcharging.
  • Verify the health of the battery sensor and ECM.

• Professional Diagnosis:

  • Given your thorough troubleshooting efforts, it might be best to consult a professional mechanic or an auto electrician.
  • They can perform more advanced tests, such as checking the alternator’s output and diagnosing any underlying issues.

What is the year and model of your vehicle?

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Congratulations on your new 2013 Lexus RX 450h! It’s great to hear that you’re enjoying it, especially with the lovely dark red color. Let’s address your questions:

1. Whirring Sound in Reverse:

   • The noise you’re hearing when you shift into reverse is likely related to the hybrid system. Specifically, it’s associated with the pedestrian warning system. This system generates a sound to alert pedestrians when the vehicle is moving in reverse. It’s designed to enhance safety, especially in situations where pedestrians might not notice the quiet electric operation of the hybrid.
   • The reason you don’t always hear it is because the system activates selectively. It typically operates when the vehicle is moving slowly in reverse, especially in parking lots or other areas where pedestrians might be present. When you’re backing up at higher speeds or in certain conditions, the system may not engage.
   • So, rest assured, this sound is normal and serves an important safety purpose.

2. EV Mode Unavailable:

   • The “EV” button you mentioned is meant to activate the Electric Vehicle (EV) mode. In this mode, the vehicle runs purely on electric power, using the battery. However, there are specific conditions that must be met for EV mode to be available:
     • Battery Charge: The hybrid battery needs to have sufficient charge. If the battery is too low, the system won’t allow EV mode.
     • Speed: EV mode usually works at lower speeds, such as during city driving or parking maneuvers.
     • Temperature: Extreme temperatures (very hot or very cold) can affect the availability of EV mode.
     • Other Factors: Factors like air conditioning usage, engine temperature, and overall system demands also play a role.
   • If you’re getting the “EV mode currently not available” message, it’s likely due to one of these conditions not being met. It’s normal for the system to manage when EV mode is active to optimize efficiency and prevent battery depletion.
   • Remember that hybrids like the RX 450h are designed to seamlessly switch between electric and gasoline power based on driving conditions. So, while EV mode is a nice feature for short electric-only trips, the system prioritizes overall efficiency.

Keep exploring your new hybrid, and don’t hesitate to reach out if you have more questions. Enjoy your Lexus adventure!

Hello, Robert.

My guess is that replacing the spare would be less expensive than having all the wheel studs replaced. You may want to compare the cost of each option.

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Congratulations on your upcoming delivery of the 2022 Lexus RCF Fuji Speedway Edition! 🎉 This special edition model is truly a gem. Let’s dive into the details:

• The 2022 RC F Fuji Speedway Edition is a limited-production variant, and only 50 units were planned for production ¹. These exclusive cars are enhanced with features like a carbon fiber hood and a rear spoiler to save weight ¹.

• Similar to last year’s model, the 2022 RC F Fuji Speedway Edition inherits the weight savings from the Track Edition introduced in 2020. Additionally, it boasts Brembo carbon-ceramic brakes, a titanium exhaust, and extensive use of carbon fiber aerodynamics. With these enhancements, it can sprint from 0 to 60 miles per hour (97 kilometers per hour) in just 3.96 seconds ².

As for the specific number of these rare beauties imported to Canada, it seems to be a bit of a mystery. Even the dealerships don’t have precise information on the exact count. But rest assured, you’ll be part of an exclusive club of lucky owners enjoying the thrill of the RC F Fuji Speedway Edition! 

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1. DOME Circuit and Parasitic Drain:

   • The DOME circuit typically controls interior lights, including the dome light, map lights, and other cabin illumination.
   • When you removed the DOME fuse, it interrupted the power supply to these lights, which explains why the battery drain ceased.

2. Radio and Information Panel Connection:

   • The unexpected part is how removing the DOME fuse affected the radio and center information panel.
   • While it might seem unrelated, there could be an interconnected module or shared component between these systems.
   • Some possibilities include:
     • Shared Ground: The DOME circuit and radio/panel might share a common ground point. Disrupting the DOME circuit could impact the ground connection for other components.
     • Control Module: There could be a control module that manages both the DOME circuit and the radio/panel. If this module malfunctions, it might cause unexpected behavior.
     • Wiring: Faulty wiring or a short circuit could inadvertently link these systems.

3. Further Investigation:

   • To pinpoint the exact cause, consider the following steps:
     • Circuit Diagram: Obtain a wiring diagram for your vehicle. This will show the connections between various components.
     • Scan for Fault Codes: Use an OBD-II scanner to check for any diagnostic trouble codes (DTCs) related to the radio or information panel.
     • Inspect Wiring: Physically inspect the wiring harnesses and connectors associated with the DOME circuit, radio, and information panel.
     • Professional Help: If you’re unable to identify the issue, consult a professional mechanic or an auto electrician (auto-electric shop). They can perform more in-depth diagnostics.

Remember that automotive electrical systems can be intricate, and seemingly unrelated components may interact in unexpected ways. Investigating systematically will help uncover the underlying cause. Good luck!