1999 Lexus RX300 Cruise Control Isn't Working
Fixing Cruise Control Issues in 1999 Lexus RX300
- Sensor: A faulty or malfunctioning sensor can lead to incorrect readings, causing issues with engine performance or other systems relying on accurate data.
- Control Module: A faulty control module can lead to erratic vehicle behavior or failure of various electronic systems due to improper signal processing.
- Throttle: A faulty throttle body or a defective accelerator pedal position sensor may be causing inconsistent throttle response.
What are the best Lexus repair shops?
Tuffy Tire & Auto Service Center - Grandview
Excite Auto Repair & Towing
All In Auto Service
Tuffy Tire & Auto Service - Grove City
How much does it cost to fix a 1999 Lexus RX300 cruise control isn't working?
Common Repairs
The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.
When the vehicle speed sensor fails or the wiring harness prevents signal transmission, the speedometer is the first thing that will stop functioning properly. This can be an intermittent issue where the speedometer only works occasionally, the speedometer may cease all function, or the speedometer may read erratically or incorrectly. Also, the traction control and anti lock brake warning lights specific to each vehicle may be illuminated, depending on the design of those systems. You may notice the vehicle hesitate to accelerate, cruise control will not function properly, and the vehicle may not shift properly through all of the gears.
In the event that a wheel speed sensor fails, the ABS, traction control system (TCS) and manufacturer specific stability control system lights will illuminate, informing the driver that the systems are disabled. The vehicle will be more prone to tire slip, and normal driving patterns may need to be adjusted to correct for the loss of computer control. On older vehicle's, the speedometer can be affected, causing illumination of the check engine light as well.
If the cruise control refuses to turn on at all, the actuator could be at fault. Likewise, if the cruise control stays on but does not maintain a consistent speed, the problem could be a bad actuator. In extreme cases, a malfunctioning actuator could cause the throttle to stick and prevent the vehicle from slowing down. These symptoms may point to a bad actuator. They may also point to other problems with the cruise control and related systems.
The cruise control switch can cause complete failure of the cruise control feature, but in a lucky scenario only partial functionality will be lost. This means that the cruise control may come on, but that it will not increase in speed automatically, or the cancel button does not work leading the driver to cancel cruise control with the foot brake. In some vehicles, the cruise control light may illuminate, or a warning message may be displayed due to lack of functionality.
A faulty cruise control module will simply result in deactivation of cruise control settings. This is because a detected error in the cruise control system could lead to hazardous driving conditions, so the module will be disabled, and the cruise control system warning light will be displayed. This will be a different message depending on make and model, and a warning light or message may be displayed on the driver instrument cluster.
What are the initial diagnostic steps to troubleshoot the non-functional cruise control in a 1999 Lexus RX300?
When faced with a non-functional cruise control in a 1999 Lexus RX300, it's important to approach the troubleshooting process methodically. Start by checking the fuse associated with the cruise control system, as a blown fuse can easily disrupt its operation. Next, verify the functionality of the speed sensor, which is critical for the cruise control to engage properly. Following this, examine the brake pedal switch; if this switch is faulty, it may prevent the cruise control from activating. Additionally, inspect the cruise control buttons on the steering wheel for any signs of damage or obstruction that could hinder their performance. Finally, consider using a diagnostic scanner to check for any error codes that may provide further insight into the problem. By systematically addressing these areas, you can effectively diagnose and potentially resolve the issues with your cruise control system.
What are the common problems that could cause the cruise control to stop working in a 1999 Lexus RX300?
When dealing with a malfunctioning cruise control system in a 1999 Lexus RX300, it's essential to understand the common problems that may be at play. One of the primary culprits is a faulty brake pedal switch, which is designed to disengage the cruise control when the brake is applied; if this switch fails, it can prevent the system from engaging. Additionally, issues with the speed sensor can disrupt the system's ability to maintain a constant speed, leading to erratic performance. Vacuum leaks in the engine can also hinder the cruise control's functionality, as they affect the system's ability to regulate speed effectively. Another potential issue is a defective cruise control module, which can render the entire system inoperative. Electrical problems, such as blown fuses or damaged wiring, can further complicate matters, interrupting the necessary power supply to the cruise control system. Lastly, concerns with the throttle cable, including wear or improper connection, can impact the system's performance. By identifying these common issues, DIYers can take the first steps toward restoring the cruise control functionality in their vehicle.
How urgent is it to repair the non-functioning cruise control in a 1999 Lexus RX300?
Repairing the non-functioning cruise control in a 1999 Lexus RX300 should be approached with a sense of urgency, as neglecting this issue can lead to several negative consequences. While it may not pose an immediate safety risk, the absence of cruise control can significantly affect the driving experience, particularly on long journeys where maintaining a consistent speed is crucial for comfort and reducing fatigue. Additionally, relying solely on manual speed adjustments can be distracting, increasing the likelihood of accidents. Furthermore, a vehicle's resale value can be adversely impacted by unresolved issues like malfunctioning cruise control, as potential buyers often seek well-maintained cars. Therefore, addressing this repair promptly not only enhances driving safety and comfort but also preserves the vehicle's overall value, making it a wise decision for any owner.
Related 1999 Lexus RX300 Problems
Read about related problems experienced by other Lexus RX300 drivers like you.
Related 1999 Lexus RX300 Questions
See what others are asking about their Lexus RX300. Get answers from RepairPal's community of auto experts and enthusiasts.