2004 Mitsubishi Montero Sport Cruise Control Isn't Working

Fixing Cruise Control Malfunctions in 2004 Mitsubishi Montero Sport

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Reviewed by
Bo Fader
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 2004 Mitsubishi Montero Sport 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 2004 Mitsubishi Montero Sport 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.

When the vehicle speed sensor fails or the wiring harness prevents signal transmission, the speedometer is the first thing that will stop functioning properly. This can be an intermittent issue where the speedometer only works occasionally, the speedometer may cease all function, or the speedometer may read erratically or incorrectly. Also, the traction control and anti lock brake warning lights specific to each vehicle may be illuminated, depending on the design of those systems. You may notice the vehicle hesitate to accelerate, cruise control will not function properly, and the vehicle may not shift properly through all of the gears.

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.

The cruise control switch can cause complete failure of the cruise control feature, but in a lucky scenario only partial functionality will be lost. This means that the cruise control may come on, but that it will not increase in speed automatically, or the cancel button does not work leading the driver to cancel cruise control with the foot brake. In some vehicles, the cruise control light may illuminate, or a warning message may be displayed due to lack of functionality.

What are the steps to diagnose the non-functioning cruise control in a 2004 Mitsubishi Montero Sport?

To effectively diagnose the non-functioning cruise control in your 2004 Mitsubishi Montero Sport, begin with the simplest checks to avoid unnecessary complications. Start by inspecting the cruise control fuse located in the fuse box; a blown fuse is often the culprit behind electrical issues. Next, examine the cruise control switch on the steering wheel to ensure it is operational and not stuck, as this can prevent engagement. Following this, assess the vehicle's speed sensors, which are vital for cruise control functionality; any malfunction here can disrupt the system. Additionally, check the brake pedal switch, as a faulty switch can inadvertently disable the cruise control. If these initial checks do not resolve the issue, utilize an OBD-II scanner to identify any error codes that may provide further insight into the problem. For vehicles equipped with a vacuum-operated cruise control system, inspect the vacuum lines for any leaks or damage that could hinder performance. If you still cannot pinpoint the issue after these steps, it may be time to consult a qualified mechanic who specializes in Mitsubishi vehicles for a more thorough diagnosis. By following this structured approach, you can systematically troubleshoot the cruise control system and potentially restore its functionality without professional assistance.

What are the common problems that could cause the cruise control to stop working in a 2004 Mitsubishi Montero Sport?

When dealing with a malfunctioning cruise control system in a 2004 Mitsubishi Montero Sport, it's essential to understand the common problems that could be at play. One of the first areas to check is the cruise control switch, as a faulty switch can prevent the system from engaging. Additionally, a blown fuse can disrupt the electrical flow necessary for the cruise control to function, so inspecting the fuses is a crucial step. Another potential issue is vacuum leaks within the cruise control system, which can significantly affect its operation. The speed sensor also plays a vital role; if it's defective, the cruise control may struggle to maintain a constant speed. Furthermore, problems with the brake light switch can interfere with the system's ability to engage, as the cruise control is designed to deactivate when the brakes are applied. Lastly, a malfunctioning throttle cable can hinder the cruise control's performance. By systematically checking these components, DIYers can effectively diagnose and address the issues affecting their vehicle's cruise control system.

How urgent is it to address the non-functioning cruise control in a 2004 Mitsubishi Montero Sport?

When it comes to the non-functioning cruise control in a 2004 Mitsubishi Montero Sport, understanding the urgency of the issue is crucial for any DIY enthusiast. While this problem may not pose an immediate safety risk like brake or engine failures, it can still significantly impact your driving experience. Cruise control is designed to enhance comfort during long drives, allowing you to maintain a steady speed without constant foot pressure on the accelerator. Neglecting this issue may lead to increased driver fatigue and frustration, especially on extended trips where the convenience of cruise control is most beneficial. Moreover, while the malfunction itself may not cause further damage to the vehicle, ignoring it for too long could lead to more complex electrical or mechanical issues down the line. Therefore, addressing the non-functioning cruise control promptly can not only restore comfort but also prevent potential complications, ensuring a smoother and more enjoyable driving experience.

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