1994 Mitsubishi Eclipse Cruise Control Isn't Working

Diagnosing Common Issues with Cruise Control in Your 1994 Mitsubishi Eclipse and How to Fix Them

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Reviewed by
Aisha
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 1994 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 1994 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 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.

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 1994 Mitsubishi Eclipse?

When faced with a non-functional cruise control in your 1994 Mitsubishi Eclipse, it's crucial to adopt a systematic diagnostic approach. Begin by checking the fuse associated with the cruise control system, as a blown fuse can often be the simplest explanation for the malfunction. Next, inspect the cruise control switch for any visible damage or wear, ensuring it is operational. The brake pedal switch is another critical component to examine, as it disengages the cruise control when the brake is applied; a faulty switch here can prevent the system from functioning. Additionally, testing the speed sensor is vital, as it must send accurate signals to the cruise control module for proper operation. Finally, utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues affecting the cruise control system. By following these steps, you can effectively narrow down the potential causes of the problem and take the necessary actions to restore functionality.

What are the common problems that could cause the cruise control to stop working in a 1994 Mitsubishi Eclipse?

When dealing with a malfunctioning cruise control system in a 1994 Mitsubishi Eclipse, it's essential to understand the common problems that could 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 itself, as a faulty switch may prevent the system from engaging or disengaging properly. Additionally, vacuum leaks can significantly impact the operation of the cruise control, so examining the vacuum lines for any signs of wear or damage is crucial. Another critical component to consider is the speed sensor; if it is malfunctioning, the cruise control may struggle to maintain a consistent speed. Lastly, issues with the brake light switch can also interfere with the cruise control's operation, as this switch is responsible for signaling when to disengage the system. By systematically checking these components, DIYers can effectively diagnose and potentially resolve the cruise control issues in their Mitsubishi Eclipse.

How urgent is it to repair the non-functioning cruise control in a 1994 Mitsubishi Eclipse?

Repairing the non-functioning cruise control in a 1994 Mitsubishi Eclipse should be approached with a sense of urgency, as neglecting this issue can lead to significant consequences. Primarily, safety is a critical concern; a malfunctioning cruise control system can result in erratic speed changes, increasing the risk of accidents on the road. Additionally, the comfort and convenience that cruise control provides during long drives cannot be overlooked, as it reduces driver fatigue and enhances the overall driving experience. Furthermore, addressing this repair can positively impact the vehicle's resale value; potential buyers may be deterred by non-functional features, viewing them as indicators of poor maintenance. Lastly, in some jurisdictions, having operational cruise control may be a legal requirement for roadworthiness, making timely repairs essential to avoid potential legal repercussions. Therefore, while it may not seem like an immediate emergency, prioritizing the repair of cruise control is crucial for ensuring safety, comfort, and compliance, as well as preserving the vehicle's value.

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