1990 Acura Legend Cruise Control Isn't Working

Fixing Cruise Control Issues in the 1990 Acura Legend

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Reviewed by
Devin Cabugcal
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Sensor
0%
25% chance it's the
Control Module
0%
25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 1990 Acura Legend cruise control isn't working are failed control module, sensor or switch issues, or throttle actuation problems.
  • 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.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 1990 Acura Legend 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.

What are the initial diagnostic steps to troubleshoot the non-functional cruise control in a 1990 Acura Legend?

When troubleshooting the non-functional cruise control in a 1990 Acura Legend, it's essential to adopt a systematic diagnostic approach. Begin by checking the fuse associated with the cruise control system, as a blown fuse is a straightforward issue that can easily be resolved. Next, inspect the vacuum lines for any signs of leaks or damage, since these are critical for the proper operation of the cruise control. Following this, test the cruise control switch to confirm it is working correctly; a malfunctioning switch is a common culprit in cruise control failures. Additionally, verify the speed sensor's functionality, as it plays a vital role in maintaining the desired speed. Don't overlook the brake pedal switch, which can disable the cruise control if faulty. Finally, if the problem persists, consider using a diagnostic scanner to check for any error codes that may provide further insight into the issue. By following these steps, you can effectively diagnose and potentially resolve the cruise control problem in your Acura Legend.

What are the common problems that could cause the cruise control to stop working in a 1990 Acura Legend?

When dealing with a malfunctioning cruise control system in a 1990 Acura Legend, it's essential to understand the common problems that may be at play. One of the first things to check is the fuse associated with the cruise control; a blown fuse can easily disrupt the system's functionality. If the fuse is intact, the next step is to inspect the cruise control switch located on the steering wheel, as a faulty switch can prevent the system from engaging properly. Additionally, vacuum leaks are a frequent culprit; these leaks can occur in the vacuum lines that support the cruise control system, so a thorough inspection of these lines is crucial. Another potential issue is a malfunctioning speed sensor, which is responsible for relaying the vehicle's speed to the cruise control system. If the speed sensor is not working correctly, it may need to be replaced. Lastly, don't overlook the brake light switch; if this switch is faulty, it can cause the cruise control to disengage unexpectedly. By systematically checking these components, you can effectively troubleshoot and resolve the cruise control issues in your Acura Legend.

How urgent is it to repair the non-functioning cruise control in a 1990 Acura Legend?

When evaluating the urgency of repairing the non-functioning cruise control in a 1990 Acura Legend, it's essential to consider the implications of neglecting this issue. While cruise control is primarily a convenience feature, its malfunction can lead to safety concerns, especially during long drives where driver fatigue may become a factor. If the cruise control system is causing erratic behavior or affecting the vehicle's overall drivability, it becomes crucial to address the problem promptly to ensure safe operation. Additionally, for those who rely on cruise control for a more comfortable driving experience, the inconvenience of its failure may warrant a quicker repair. Lastly, if you are considering selling your vehicle, fixing the cruise control can enhance its resale value, making it a worthwhile investment. Ultimately, while the urgency may vary based on individual circumstances, prioritizing the repair can help maintain both safety and comfort on the road.

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