1999 Mitsubishi Eclipse Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 1999 Mitsubishi Eclipse and How to Fix Them

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Reviewed by
Andrew Hajjar
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 1999 Mitsubishi Eclipse 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 1999 Mitsubishi Eclipse 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.

What are the initial diagnostic steps to troubleshoot the non-functional cruise control in a 1999 Mitsubishi Eclipse?

When troubleshooting the non-functional cruise control in a 1999 Mitsubishi Eclipse, it's important to adopt a systematic diagnostic approach. Begin by checking the fuse associated with the cruise control system, as a blown fuse is a common and easily fixable issue. Next, inspect the wiring for any visible damage or loose connections, since faulty wiring can disrupt the system's operation. Testing the cruise control switch is also crucial; if the switch is defective, it will prevent the cruise control from engaging. Additionally, examine the vacuum lines, as older models like the Eclipse often rely on these for proper functionality; any leaks or damage here can significantly impact performance. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into specific problems affecting the cruise control system. Finally, inspect the cruise control module for signs of damage or corrosion, as a malfunctioning module can be the root cause of the issue. By following these steps, you can effectively diagnose and potentially resolve the cruise control problem in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 1999 Mitsubishi Eclipse?

When dealing with a malfunctioning cruise control system in a 1999 Mitsubishi Eclipse, it's crucial to understand the common problems that could be at play. One of the primary culprits is a faulty cruise control switch, which can prevent the system from engaging properly. Additionally, a blown fuse within the cruise control circuit can lead to a complete failure of the system, making it essential to check the fuses first. Another frequent issue is vacuum leaks, which can disrupt the necessary pressure for the cruise control to function effectively. A defective speed sensor may also be responsible, as it can cause the system to malfunction or disengage unexpectedly. Furthermore, problems with the brake light switch can inhibit the cruise control from activating, while issues with the throttle cable can affect its ability to maintain speed. By systematically diagnosing these potential issues, DIYers can effectively troubleshoot and resolve the cruise control problems in their Mitsubishi Eclipse.

How urgent is it to repair the non-functioning cruise control in a 1999 Mitsubishi Eclipse?

When evaluating the urgency of repairing the non-functioning cruise control in your 1999 Mitsubishi Eclipse, it's essential to weigh the implications of neglecting this issue. While cruise control is primarily a convenience feature, its malfunction can impact your driving experience and safety. If the system's failure leads to inconsistent speed control, it could pose a safety risk, particularly on long highway drives where maintaining a steady speed is crucial. Additionally, a functioning cruise control system enhances comfort during extended trips, reducing fatigue and making driving more enjoyable. Furthermore, if you plan to sell or trade in your vehicle, having a fully operational cruise control can positively influence its resale value. Therefore, while the repair may not be immediately critical, addressing it sooner rather than later can enhance your driving safety, comfort, and the overall value of your vehicle.

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