1996 Mazda Miata Cruise Control Isn't Working

Diagnosing Common Issues with Cruise Control in Your 1996 Mazda Miata and How to Fix Them

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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 1996 Mazda Miata 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 1996 Mazda Miata 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.

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 steps to diagnose the non-functioning cruise control in a 1996 Mazda Miata?

To effectively diagnose the non-functioning cruise control in your 1996 Mazda Miata, start with a systematic approach that prioritizes simpler checks before moving on to more complex diagnostics. Begin by inspecting the fuse associated with the cruise control system, as a blown fuse is a common and easily fixable issue. Next, evaluate the cruise control switch to ensure it is operational; a malfunctioning switch can prevent the system from engaging. Following this, check the brake pedal switch, which is crucial for safety as it disengages the cruise control when the brake is applied. If these components are functioning correctly, turn your attention to the vehicle speed sensor, as it is essential for the cruise control to operate effectively. Additionally, inspect the vacuum lines for any signs of wear or leaks, as these can significantly impact the system's performance in older vehicles. Finally, consider using an OBD-II scanner to identify any error codes that may provide insight into underlying issues. By following this structured diagnostic approach, you can efficiently identify and resolve the problem with your cruise control system.

What are the common problems that could cause the cruise control to stop working in a 1996 Mazda Miata?

When troubleshooting the cruise control system in a 1996 Mazda Miata, it's essential to consider several common problems that could be at play. One of the first things to check is the fuse; a blown fuse can easily disrupt the cruise control's functionality, and replacing it is a straightforward fix. 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 properly. Additionally, vacuum leaks can significantly impact the cruise control's performance, so examining the vacuum lines for any signs of wear or damage is crucial. Another potential culprit is the speed sensor; if it's malfunctioning, it can hinder the system's ability to maintain speed, necessitating a replacement. Lastly, issues with the brake light switch can cause the cruise control to disengage unexpectedly, so checking this component is also advisable. By systematically addressing these common issues, you can effectively troubleshoot and potentially restore the cruise control functionality in your Miata.

How urgent is it to address the non-functioning cruise control in a 1996 Mazda Miata?

When it comes to the non-functioning cruise control in a 1996 Mazda Miata, understanding the urgency of the situation is crucial for any DIY enthusiast. While the immediate safety risks may not be as pronounced as with other critical vehicle systems, neglecting this issue can lead to complications that affect your driving experience. A malfunctioning cruise control can hinder your ability to maintain a steady speed, which is particularly important during long drives where fatigue can set in. Moreover, if left unaddressed, the underlying problems could escalate, potentially resulting in more extensive repairs and increased costs. Therefore, while it may not be an emergency, it is wise to prioritize an inspection of the cruise control system. This proactive approach not only ensures your vehicle operates efficiently but also helps maintain its overall performance and reliability on the road.

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1996 Mazda Miata Cruise Control Issues & Repair Costs