1996 Mitsubishi Diamante Cruise Control Isn't Working

Fixing Cruise Control Issues in the 1996 Mitsubishi Diamante

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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 Mitsubishi Diamante 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 Mitsubishi Diamante 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 initial steps to diagnose the non-functioning cruise control in a 1996 Mitsubishi Diamante?

To effectively diagnose the non-functioning cruise control in a 1996 Mitsubishi Diamante, start with the simplest checks before moving on to more complex diagnostics. Begin by inspecting the cruise control fuse, as a blown fuse can easily disrupt the system's operation. Next, examine the cruise control switch for any visible damage or wear, ensuring it is functioning properly. The brake pedal switch is another critical component; it must be operational since it disengages the cruise control when the brake is applied. Additionally, check the vehicle speed sensor to confirm it is sending accurate signals to the cruise control system. Finally, if the issue persists, consider using a diagnostic scanner to retrieve any error codes from the vehicle's computer, which can provide valuable insights into the underlying problem. By following these steps, you can systematically identify and address the issues affecting your cruise control system.

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

When dealing with a malfunctioning cruise control system in a 1996 Mitsubishi Diamante, it's crucial to understand the common problems that may 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, as a faulty switch can prevent the system from engaging or disengaging properly. Additionally, vacuum leaks are a frequent culprit, as they can interfere with the system's operation, leading to inconsistent performance. Another important component to examine is the speed sensor; if it is malfunctioning, the cruise control may struggle to maintain a steady speed. Furthermore, issues with the brake light switch can also hinder the cruise control's ability to function correctly, as it relies on this switch to know when to disengage. Lastly, don’t overlook the throttle cable, as any malfunction here can significantly impact the cruise control's ability to maintain speed. By systematically checking these components, DIYers can effectively diagnose and address the cruise control issues in their Mitsubishi Diamante.

How urgent is it to address the malfunctioning cruise control in a 1996 Mitsubishi Diamante?

Addressing the malfunctioning cruise control in a 1996 Mitsubishi Diamante is of utmost urgency due to the significant safety risks it poses. A malfunctioning system can lead to unexpected acceleration or deceleration, creating hazardous driving conditions that could result in accidents. Moreover, the convenience of cruise control is particularly valuable during long trips, and its failure can detract from the overall driving experience, making journeys less enjoyable and more stressful. Additionally, ignoring these symptoms can lead to increased fuel consumption, as inconsistent speed control often results in inefficient driving patterns. Promptly addressing the issue not only enhances safety and comfort but also helps prevent further damage to the vehicle's systems, potentially saving you from costly repairs down the line. Therefore, it is crucial to take immediate action to resolve any cruise control malfunctions to ensure a safe and efficient driving experience.

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1996 Mitsubishi Diamante Cruise Control Issues & Repairs