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 throttle position sensor fails, the engine's computer tends to overcompensate with fuel, leading black exhaust coming from the tailpipe. There is a strong possibility of engine misfires, and the check engine light will come on.
Throttle position sensors can also develop "dead spots," or certain places along the throttle curve where it doesn't get a reading. When this happens, the above symptoms can occur but then stop when you further press or let off the gas pedal.
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.
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.
To effectively diagnose the non-functioning cruise control in your 1999 Lexus LX470, start with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by ensuring that the cruise control system is activated and set correctly, as this is a common oversight. Next, verify the functionality of the speed sensor, as it plays a crucial role in the cruise control operation. Proceed to inspect the fuse box for any blown fuses that may disrupt the system's power supply. If the basics check out, examine the cruise control module for any visible damage or loose connections that could hinder performance. Utilizing an OBD-II scanner can help identify any error codes that may provide insight into the issue. Additionally, test the cruise control switch to confirm it is operational, and check the brake and clutch switches, as their proper functioning is essential for cruise control engagement. Lastly, inspect the vacuum lines for any leaks or damage, as these can significantly impact the system's performance. By following this structured diagnostic approach, you can effectively identify and address the issues affecting your cruise control system.
When dealing with a malfunctioning cruise control system in a 1999 Lexus LX470, it's crucial to understand the common problems that may be at play. One of the first areas to check is the cruise control switch, as a faulty switch can prevent the system from engaging. Additionally, a blown fuse can disrupt the electrical flow necessary for the cruise control to function, so inspecting the fuses is a vital step. Another potential issue could be vacuum leaks within the system, which can significantly affect its performance. The speed sensor also plays a critical role; if it is defective, it may provide inaccurate speed readings, leading to cruise control failure. Furthermore, the brake light switch is essential for the system's operation, and any issues here can hinder engagement. Lastly, a malfunctioning throttle cable can prevent the cruise control from maintaining the desired speed. By systematically checking these components, DIYers can effectively diagnose and address the cruise control issues in their Lexus LX470.
When evaluating the urgency of repairing the non-functioning cruise control in a 1999 Lexus LX470, it is crucial to recognize the potential safety risks and inconveniences associated with its malfunction. A properly functioning cruise control system is essential for maintaining a consistent speed, particularly during long drives, which can significantly reduce driver fatigue and enhance overall road safety. If the cruise control is not operational, drivers may experience unexpected speed fluctuations, making it challenging to maintain control of the vehicle and increasing the risk of accidents. Additionally, in some jurisdictions, driving with faulty cruise control could lead to legal repercussions, including fines for violating road safety regulations. Beyond safety and legal concerns, the lack of cruise control can diminish driving comfort, as drivers are required to manually adjust their speed more frequently, leading to increased strain during extended trips. Therefore, while it may not be as critical as addressing immediate safety issues like brake failure, timely repair of the cruise control system is advisable to ensure a safe, compliant, and comfortable driving experience.
Read about related problems experienced by other Lexus LX470 drivers like you.
See what others are asking about their Lexus LX470. Get answers from RepairPal's community of auto experts and enthusiasts.
