Troubleshooting Tips: Fix Your 2012 Jeep Grand Cherokee Cruise Control Not Working
In the realm of automotive technology, where every button and switch serves a distinct purpose, there is nothing quite as frustrating as a malfunctioning cruise control. Imagine embarking on a long journey, seeking the freedom of the open road, only to find that your trusted 2012 Jeep Grand Cherokee is plagued by an unresponsive on/off button and a host of other control panel dilemmas.
Panic sets in, as you desperately attempt to restart the vehicle, hoping for a temporary fix. But alas, the problem persists, leaving you wondering about the possible culprits: is it a fault within the speed control system, or perhaps a glitch in the adaptive cruise control’s front sensor?
In this gripping exploration, we shall uncover the mysteries behind this confounding issue, unraveling the tangled web of automotive technology gone awry. Prepare to delve into the perplexing world of the 2012 Jeep Grand Cherokee cruise control malfunction, as we navigate through the twists and turns in search of answers.
2012 jeep grand cherokee cruise control not working
If the cruise control on your 2012 Jeep Grand Cherokee is not working, there could be a few potential causes. First, check if the cruise control turns off when trying to lower the speed and if none of the other buttons for cruise control work.
If this is the case, it is possible that the on/off button is unable to turn the cruise control back on, and restarting the car allows the on/off button to work momentarily before the cruise control turns off again after setting the speed.
In the 2012 Jeep Grand Cherokee, the speed control system is built into the Powertrain Control Module (PCM) and not a separate module. The speed control switch pod on the steering wheel controls the system, and pressing a button on the switch pod sends a signal to the Steering Control Module (SCM), which relays information to the PCM.
The PCM monitors inputs from the speed control system, such as the ABS module (ABM) and brake lamp switch.
If a fault is detected in the system, a Diagnostic Trouble Code (DTC) will be set, and the cruise control will be disabled. Possible issues that can cause the cruise control not to work include problems with the engine speed sensor, electric throttle, brake pedal position, or even the front sensor of an adaptive cruise control system (if applicable).
To resolve the issue, it is recommended to have the vehicle diagnosed by a qualified mechanic who can read the DTCs stored in the PCM and perform the necessary troubleshooting steps to identify and fix the problem causing the cruise control malfunction.
Key Points:
- Possible causes for the cruise control not working on a 2012 Jeep Grand Cherokee include:
- Malfunctioning on/off button
- System fault detected by the PCM
- Restarting the car may temporarily fix the on/off button issue, but the cruise control will turn off again after setting the speed.
- The speed control system on the 2012 Jeep Grand Cherokee is built into the PCM and controlled by the steering wheel switch pod, which sends signals to the SCM and PCM.
- The PCM monitors inputs from the ABS module and brake lamp switch for the speed control system.
- Faults in the system can result in a DTC and disable the cruise control feature. Possible issues include:
- Engine speed sensor problems
- Electric throttle problems
- Brake pedal position problems
- Adaptive cruise control sensor problems
- It is recommended to have a qualified mechanic diagnose the issue by:
- Reading the DTCs stored in the PCM
- Performing troubleshooting steps to identify and fix the cause of the cruise control malfunction.
Sources
https://www.jeepforum.com/threads/cruise-control-not-working.3983337/
https://www.jeepgarage.org/threads/cruise-control-stopped-working.30674/
https://repairpal.com/jeep/grand-cherokee/cruise-control-not-working
https://mechanicbase.com/troubleshooting/cruise-control-is-not-working/
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💡 Pro Tips:
1. Check for a blown fuse in the circuit that controls the cruise control system.
2. Inspect the brake pedal position switch for any signs of damage or misalignment that may be preventing the cruise control from working.
3. Clean the throttle body and electronic throttle control module to ensure proper functionality of the cruise control system.
4. Verify that the cruise control cable is not damaged or stuck, as this can also cause issues with the system.
5. Consult the vehicle’s owner’s manual to locate and reset the cruise control system’s ECM or PCM, which may help resolve any software glitches or conflicts.
Cruise Control Turns Off When Trying To Lower Speed
If you’ve noticed that your 2012 Jeep Grand Cherokee’s cruise control turns off when you attempt to lower the speed, there could be several potential issues causing this problem. One possibility is a fault in the speed control system, specifically with the control module responsible for relaying information to the Powertrain Control Module (PCM).
When the system detects a fault, it automatically disables the cruise control and sets a Diagnostic Trouble Code (DTC).
To address this issue, you may need to have your vehicle’s speed control system diagnosed using a diagnostic tool or by taking it to a professional mechanic. The DTC should point to the specific component or sensor causing the problem.
Potential culprits could include the engine speed sensor, electric throttle, brake pedal position, or even the Adaptive Cruise Control’s front sensor (ACC), as it can also affect the functionality of the cruise control.
None Of The Other Buttons For Cruise Control Work
If you find that none of the buttons for your 2012 Jeep Grand Cherokee’s cruise control are working, it indicates a more widespread issue with the system. Since all the buttons control different aspects of the cruise control function, it suggests a potential problem with the control module or a malfunction in the wiring that connects the buttons to the module.
To troubleshoot this problem, it is advisable to first check the wiring harnesses and connections for any signs of damage or loose connections. A faulty or damaged wiring harness can disrupt the communication between the buttons and the control module, rendering the buttons non-functional.
If the wiring appears to be in proper condition, the next step would be to have the control module itself checked and possibly replaced.
On/Off Button Unable To Turn Cruise Control Back On
If you’re experiencing an issue where the on/off button fails to turn your 2012 Jeep Grand Cherokee’s cruise control back on, there could be a problem with the switch pod on the steering wheel. The switch pod is responsible for sending signals to the Steering Control Module (SCM), which in turn communicates with the PCM in order to engage or disengage the cruise control.
To resolve this problem, you may need to have the switch pod inspected for any internal faults or worn-out components. If necessary, the switch pod may need to be replaced to restore the functionality of the on/off button.
It’s worth noting that restarting the car can sometimes temporarily restore the on/off button’s functionality, but the cruise control may still turn off after setting the desired speed.
Restarting The Car Allows The On/Off Button To Work, But Cruise Control Turns Off After Setting Speed
If restarting your 2012 Jeep Grand Cherokee allows the on/off button to work momentarily before the cruise control turns off after setting the desired speed, there could be an underlying issue within the speed control system. As previously mentioned, the speed control system is built into the PCM and any faults detected can result in the cruise control being disabled.
To address this problem, it is essential to diagnose the specific fault triggering the cruise control to turn off. This can be done by retrieving the Diagnostic Trouble Code (DTC) that is stored in the system.
Once you have the DTC, you can then identify the component or sensor responsible for the issue and proceed with the necessary repairs or replacements.
Vehicle Is A Laredo Model Without Adaptive Cruise Control
It’s important to note that the 2012 Jeep Grand Cherokee Laredo model does not come equipped with Adaptive Cruise Control (ACC). If you’re experiencing issues with the cruise control on this particular model, the troubleshooting steps mentioned earlier should be followed to identify and resolve the problem.
However, it’s worth mentioning that the absence of ACC may simplify the diagnostic process, as there are fewer components and systems to consider.
Speed Control System Is Built Into The PCM And Not A Separate Module
Unlike some other vehicles, the speed control system in the 2012 Jeep Grand Cherokee is built directly into the PCM rather than being a separate module. This means that any faults or issues with the cruise control are closely tied to the PCM and its interactions with other components and sensors within the vehicle.
Understanding this integration is crucial when troubleshooting cruise control problems. It highlights the importance of diagnosing the system using specialized tools and techniques that can communicate with the PCM.
By identifying the precise fault triggering the cruise control malfunction, you can take the necessary steps to rectify the issue, whether that involves replacing a sensor, repairing a wiring connection, or even replacing the PCM itself.
In conclusion, troubleshooting and fixing a non-functional cruise control in your 2012 Jeep Grand Cherokee can be a complex process involving the analysis of various components and systems. From issues with individual buttons to faults within the speed control system, it’s crucial to follow a systematic approach to identify and resolve the root cause of the problem.
Remember to consult the vehicle’s diagnostic trouble codes, seek professional assistance when needed, and prioritize safety throughout the troubleshooting process.
