2012 Scion IQ Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2012 Scion iQ 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 2012 Scion iQ 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 2012 Scion iQ 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.

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 steps to diagnose the non-functioning cruise control in a 2012 Scion iQ?

When diagnosing the non-functioning cruise control in a 2012 Scion iQ, it's crucial to follow a structured approach that emphasizes simpler solutions before tackling more complex issues. Begin by checking the cruise control fuse, as a blown fuse is a common and straightforward problem that can disrupt the system's operation. Next, inspect the cruise control switch to ensure it is working properly; a malfunctioning switch can prevent the system from engaging. After that, examine the brake pedal switch, which is designed to disengage the cruise control when pressed; if this switch is faulty, it could be the reason for the malfunction. Additionally, utilizing a diagnostic scanner to check for error codes can reveal hidden issues that may not be immediately apparent. Finally, assess the vehicle speed sensor, as it plays a vital role in the cruise control system's functionality. By systematically addressing these components, you can effectively diagnose and potentially resolve the cruise control issue in your Scion iQ.

What are the common problems that could cause the cruise control to stop working in a 2012 Scion iQ?

When troubleshooting the cruise control system in a 2012 Scion iQ, it's essential to consider several common issues that may be at play. One of the primary culprits is a faulty brake pedal switch, which is crucial for disengaging the cruise control when the brake is applied. If this switch is malfunctioning, it can prevent the system from engaging altogether. Another potential issue is a defective speed sensor; this component is vital for the cruise control to maintain a steady speed, and any disruption can lead to failure. Additionally, a blown fuse in the cruise control circuit can halt its operation, making it a straightforward fix for DIYers to check. Vacuum leaks can also impact the system, as they affect the vacuum-operated components essential for cruise control functionality. Lastly, a malfunctioning cruise control module may be the root cause of the problem, requiring further inspection. By systematically checking these components, DIY enthusiasts can effectively diagnose and potentially resolve the cruise control issues in their Scion iQ.

How urgent is it to address the non-functioning cruise control in a 2012 Scion iQ?

When it comes to the non-functioning cruise control in a 2012 Scion iQ, it's essential to recognize that while this issue may not present an immediate safety hazard like malfunctioning brakes or steering, it still warrants prompt attention. The cruise control system is designed to enhance driving comfort and efficiency, particularly on long journeys, and its failure can lead to increased driver fatigue and reduced fuel economy. Ignoring this problem could lead to more significant electrical issues within the vehicle, potentially affecting other systems and leading to costly repairs down the line. Therefore, while the urgency may not be as high as with critical safety components, addressing the cruise control malfunction in a timely manner is advisable to maintain the vehicle's overall functionality and ensure a safe and pleasant driving experience.

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2012 Scion iQ Cruise Control Not Working: Causes & Repairs