Mitsubishi Expo LRV Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Mitsubishi Expo LRV and How to Fix Them

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Reviewed by
Andrew Hajjar
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 Mitsubishi Expo LRV 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 Mitsubishi Expo LRV 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.

Troubleshooting Cruise Control Issues in a Mitsubishi Expo LRV

When troubleshooting cruise control issues in a Mitsubishi Expo LRV, it's essential to adopt a systematic diagnostic approach that begins with the simplest potential problems before moving on to more complex ones. Start by checking the vehicle's fuse box for any blown fuses related to the cruise control system, as this is a straightforward fix that can often resolve the issue. Next, inspect the vehicle speed sensor, which is crucial for the cruise control's operation; if it's faulty, replacing it can restore functionality. Additionally, consider any modifications made to the vehicle, such as the installation of LED lights in the tail or stop lights, as these can interfere with the cruise control circuit. If these initial checks do not resolve the issue, examine the cruise control switch on the steering wheel and the brake pedal switch, as either could be defective and prevent the system from engaging. Lastly, if problems persist, investigate the throttle control system, as issues here can also impact cruise control performance. By following this methodical approach, you can effectively diagnose and address the common causes of cruise control problems in your Mitsubishi Expo LRV.

What Could Cause the Cruise Control to Malfunction in a Mitsubishi Expo LRV?

When troubleshooting cruise control malfunctions in a Mitsubishi Expo LRV, it's essential to consider several common problems that could be affecting the system's performance. One of the primary culprits is blown fuses, which can interrupt the power supply necessary for cruise control operation. Additionally, issues with the brake pedal sensor can prevent the cruise control from engaging properly, as this sensor plays a critical role in the system's functionality. A faulty cruise control switch or damaged wiring can also lead to malfunctions, often indicated by the OBDII code P1564. Furthermore, modifications such as installing LED lights in the combo tail/stop lights can inadvertently disrupt the cruise control circuit, as it is linked to the brake light circuit that disengages cruise control when the brake pedal is pressed. Other factors, including a faulty brake light, a malfunctioning brake switch, or even engine-related issues, can contribute to the problem. By systematically identifying and addressing these potential issues, DIY enthusiasts can effectively resolve cruise control malfunctions in their Mitsubishi Expo LRV.

Why is the Cruise Control Not Working in a Mitsubishi Expo LRV?

When cruise control malfunctions in a Mitsubishi Expo LRV, it is crucial to address the issue promptly to avoid potential safety hazards and prevent further damage to the vehicle. A malfunctioning cruise control system can lead to erratic speed control, which may increase the risk of accidents, especially during long drives. Additionally, if the cruise control light activates without maintaining speed, it indicates a deeper problem that could affect other vehicle systems. Modifications, such as changes to the brake light circuit, can also disrupt cruise control functionality, making it essential to ensure that all components are compatible and functioning correctly. Furthermore, in manual transmission vehicles, issues with the clutch pedal can prevent the cruise control from engaging, highlighting the need for thorough diagnostics. By addressing these symptoms early, drivers can maintain their vehicle's safety and performance, ensuring a smoother and more reliable driving experience.

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