2005 Suzuki Aerio Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2005 Suzuki Aerio and How to Fix Them

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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 2005 Suzuki Aerio cruise control isn't working are failed control module, sensor or switch issues, or throttle actuation problems.
  • Sensor: A faulty sensor can lead to incorrect readings, causing issues with engine performance or triggering warning lights on the dashboard.
  • Control Module: A faulty control module can result in 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 acceleration and poor engine 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 2005 Suzuki Aerio 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.

What are the steps to diagnose the non-functioning cruise control in a 2005 Suzuki Aerio?

To effectively diagnose the non-functioning cruise control in your 2005 Suzuki Aerio, start by utilizing a diagnostic scanner to retrieve any Diagnostic Trouble Codes (DTCs) that may indicate the underlying issue. This initial step can save time by pinpointing specific problems within the cruise control switch signal circuit. Next, inspect the wiring and connectors associated with the cruise control system for signs of damage, corrosion, or loose connections, as these can often disrupt functionality. Pay particular attention to the clutch and brake pedal switches, ensuring that the cruise switch contacts are functioning correctly when the pedals are in their respective positions. If the cruise control fails to maintain speed when you lift off the gas, this could signal a problem with these switches. Additionally, locate the fuse dedicated to the cruise control in the fuse box and test it for continuity using a multimeter; a blown fuse may be the simplest fix. If the check engine light is illuminated, consider resetting the system by disconnecting the battery for a brief period, which can sometimes resolve minor electronic glitches. By following this structured approach, you can systematically identify and address the issues affecting your cruise control system, potentially saving on repair costs and enhancing your DIY skills.

What common issues cause cruise control failure in a 2005 Suzuki Aerio?

When dealing with cruise control failure in a 2005 Suzuki Aerio, it's essential to consider several common problems that could be at play. One of the primary culprits is a malfunctioning control module, which can disrupt the entire cruise control system. Additionally, issues with sensors or switches, such as the brake pedal position sensor, can prevent the system from engaging properly. Throttle actuation problems are also frequent, where the throttle body may not respond as expected, leading to a lack of acceleration control. Furthermore, blown fuses can interrupt the power supply to the cruise control, rendering it inoperative. Lastly, the PRNDL or shifter position switch can cause complications if it fails to communicate the vehicle's gear status correctly. By understanding these potential issues, DIYers can systematically diagnose and address the root cause of cruise control failure in their Suzuki Aerio.

How urgent is it to address the non-functioning cruise control in a 2005 Suzuki Aerio?

Addressing the non-functioning cruise control in a 2005 Suzuki Aerio is not just a matter of convenience; it is a critical safety concern that should be prioritized. When cruise control malfunctions, it can lead to a frustrating driving experience, especially during long trips where this feature is most beneficial. More importantly, a faulty cruise control system may signal underlying mechanical issues that could escalate if left unattended. Ignoring these symptoms can result in significant safety risks, particularly on highways where maintaining a steady speed is essential for safe driving. Additionally, unresolved cruise control problems can lead to further complications, such as increased wear on other vehicle components or even complete system failure. Therefore, it is crucial for DIY enthusiasts to promptly diagnose and repair any cruise control issues to ensure not only the comfort of their driving experience but also the overall safety and performance of their vehicle. Taking action now can prevent more extensive repairs and enhance the longevity of the Suzuki Aerio.

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