1993 Toyota Tercel Cruise Control Isn't Working

Fixing Cruise Control Issues in Your 1993 Toyota Tercel

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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 1993 Toyota Tercel 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 1993 Toyota Tercel 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.

What are the initial diagnostic steps to troubleshoot the non-functional cruise control in a 1993 Toyota Tercel?

To troubleshoot the non-functional cruise control in your 1993 Toyota Tercel, begin with the simplest checks before moving on to more complex diagnostics. Start by inspecting the fuse associated with the cruise control system; a blown fuse can easily disrupt functionality. Next, examine the cruise control switch for any visible damage or wear, as a faulty switch may need replacement. Following this, inspect the vacuum lines for leaks or damage, since any issues here can prevent the system from engaging properly. Additionally, check the brake pedal switch, which is vital for disengaging the cruise control when the brakes are applied; ensure it operates correctly and make adjustments or replacements as necessary. Finally, assess the vehicle speed sensor, as it provides critical input to the cruise control system; if it’s malfunctioning, replacing it may resolve the issue. By systematically following these steps, you can effectively diagnose and potentially fix the cruise control problem in your Tercel.

What are the common problems that could cause the cruise control to stop working in a 1993 Toyota Tercel?

When troubleshooting cruise control issues in a 1993 Toyota Tercel, it's essential to consider several common problems that could be at play. A blown fuse is often the first culprit to check, as it can easily disrupt the electrical flow necessary for the system to function. If the fuse is intact, the next step is to inspect the cruise control switch, which may be faulty and prevent the system from engaging or disengaging correctly. Additionally, vacuum leaks can significantly impact the cruise control's performance, as they lead to a loss of pressure that is crucial for maintaining speed. Another critical component to examine is the speed sensor; if it is malfunctioning, the cruise control may struggle to keep a constant speed. Lastly, issues with the brake light switch can also interfere with the cruise control operation, as this switch is designed to disengage the system when the brakes are applied. By systematically checking these components, DIYers can effectively diagnose and potentially resolve the cruise control issues in their Tercel.

How urgent is it to address the non-functioning cruise control in a 1993 Toyota Tercel?

When considering the urgency of fixing the non-functioning cruise control in your 1993 Toyota Tercel, it is crucial to recognize the potential safety risks involved. A malfunctioning cruise control can lead to erratic vehicle behavior, such as unexpected acceleration or deceleration, which can significantly increase the risk of accidents. Additionally, the comfort of your driving experience is compromised when you cannot rely on cruise control to maintain a steady speed, leading to fatigue during long drives. Furthermore, neglecting this issue can adversely affect your vehicle's resale value, as prospective buyers often look for well-maintained features. To prevent further complications, it is advisable to have a professional mechanic conduct a diagnostic check to identify the root cause of the problem. Addressing the cruise control issue promptly not only enhances your safety and comfort but also contributes to the overall longevity and value of your vehicle.

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