1990 Hyundai Excel Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 1990 Hyundai Excel 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 1990 Hyundai Excel cruise control isn't working are failed control module, sensor or switch issues, or throttle actuation problems.
  • Sensor: A faulty sensor can lead to incorrect readings, causing issues with engine performance or triggering warning lights on the dashboard.
  • Control Module: A faulty control module can result in 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 acceleration and poor engine 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 Hyundai Excel 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.

What are the steps to diagnose the non-functioning cruise control in a 1990 Hyundai Excel?

To effectively diagnose the non-functioning cruise control in your 1990 Hyundai Excel, start with the simplest solutions before progressing to more intricate assessments. Begin by checking the fuse associated with the cruise control system; a blown fuse can often be the culprit behind the malfunction. Next, inspect the brake pedal and throttle body, as issues in these components can disrupt the cruise control's operation. If these initial checks do not reveal the problem, use a diagnostic scanner to verify the speed sensor's functionality, as it plays a crucial role in cruise control performance. Lastly, consider examining the vacuum release valve, as a failure here can also lead to cruise control issues. By following this structured approach, you can efficiently identify and address the problem, ensuring your cruise control system is back in working order.

What causes cruise control failure in a 1990 Hyundai Excel?

When experiencing cruise control failure in a 1990 Hyundai Excel, it's essential to understand the common problems that may be at play. One of the primary culprits is a malfunctioning control module or sensor, which can disrupt the system's ability to maintain speed. Additionally, electrical issues such as faulty wiring, poor connections, or inadequate source voltage can prevent the cruise control from functioning correctly. A worn-out cruise control switch is another frequent issue, as it may fail to make proper contact with the cruise control module, leading to operational failures. Furthermore, the physical components of the system, like the cruise control cables, can stretch or break over time, causing a loss of functionality. Other potential problems include blown fuses, defective brake pedal switches, and issues with the throttle control system or vacuum lines. By systematically checking these components, DIYers can effectively diagnose and address the root causes of cruise control failure in their Hyundai Excel.

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

When it comes to the non-functioning cruise control in a 1990 Hyundai Excel, understanding the urgency of repair is crucial for both comfort and safety. While the absence of cruise control may not seem critical, especially for short trips, it can significantly impact long-distance driving. A malfunctioning cruise control system can lead to increased driver fatigue, as maintaining a constant speed becomes a manual task, which can be particularly taxing on highways. Moreover, the underlying causes of the malfunction—ranging from a simple blown fuse to more complex electrical issues—can vary in urgency. If the problem is minor, such as a blown fuse, it can be resolved quickly and conveniently. However, if it stems from a more serious issue, such as a defective brake pedal switch or throttle control problems, it may require immediate attention to prevent further complications. Ultimately, while the cruise control system may not be essential for the vehicle's basic operation, ensuring that all features are functioning properly is vital for overall safety and driving experience. Addressing the cruise control issue promptly can enhance your comfort on the road and contribute to safer driving conditions.

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Troubleshooting 1990 Hyundai Excel Cruise Control Issues