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.
To effectively diagnose the non-functioning cruise control in your 1990 Jeep Cherokee, start with the simplest solutions before moving on to more complex checks. Begin by inspecting the fuse and brake switch, as these are common culprits that can disrupt the cruise control system. If these components are functioning properly, recalibrating the cruise control system may resolve the issue. Next, access the steering column cover to examine the switch, which could be malfunctioning. Additionally, inspect the vacuum hoses for any disconnections, as these can significantly affect the system's performance. If the problem persists, consider investigating the control module, sensor, switch, or throttle actuation, as these are often linked to cruise control failures. By following this structured approach, you can systematically identify and address the issues affecting your Jeep's cruise control functionality.
When contemplating the urgency of repairing the non-functioning cruise control in your 1990 Jeep Cherokee, it's essential to recognize that this feature, while convenient, can also be indicative of more serious underlying issues. If you frequently embark on long highway drives, the absence of cruise control can lead to fatigue and reduced driving comfort, making the repair more pressing. Moreover, a malfunctioning cruise control system may signal problems with other critical components, such as the brake pedal switch or throttle control system, which could compromise your vehicle's overall safety and functionality. Ignoring these symptoms not only risks further damage but could also lead to safety hazards on the road. Therefore, if you notice any irregularities with your cruise control, it is advisable to address them promptly, either through a DIY approach or by consulting a qualified mechanic, to ensure your Jeep remains safe and reliable for all your driving needs.
See what others are asking about their Jeep Cherokee. Get answers from RepairPal's community of auto experts and enthusiasts.
Read about related problems experienced by other Jeep Cherokee drivers like you.
