Dealing with a Jeep Grand Cherokee remote start that won’t work can be tough. Owners face mysterious system failures that stop their remote start from working right. These problems can be anything from simple battery issues to complex electronic failures.
Modern Jeep Grand Cherokees have advanced remote start systems for convenience and comfort. When these systems fail, knowing the cause is key to fixing the issue fast.
This guide will show you why your Jeep Grand Cherokee remote start might not work. We’ll look at how to diagnose problems, find solutions, and get expert advice. This will help you get your remote start working again quickly.
Whether it’s key fob troubles, electronic bugs, or security system issues, we’ve got you covered. Our detailed approach will help you find and fix the problem step by step.
Jeep Grand Cherokee Remote Start System
The Jeep Grand Cherokee remote start system makes getting into your car easier. It lets you start your vehicle from afar, which is great in bad weather. This feature works well on many trim, like Laredo, Altitude, and Limited.
To use the Jeep Grand Cherokee remote start system, you need to know a few things. We’ll cover the basics to help your system work right.
Basic Components of the Remote Start System
The system has a few key parts:
- Key fob transmitter
- Receiver module
- Vehicle’s electrical system
- Uconnect® communication platform
How Remote Start Should Function
The system should let you start the engine from a distance. It runs for 10 minutes at first. You can make it run for 20 minutes with a second press.
Common Operation Requirements
Jeep Grand Cherokee Remote Start Not Working often because of certain conditions. The system needs the right settings to work:
| Requirement | Status |
|---|---|
| Transmission in Park | Must be engaged |
| Doors | Must be closed |
| Hood | Must be completely closed |
| Fuel Level | Sufficient for operation |
Some things can stop the remote start from working. These include a weak key fob battery, signal interference, and certain car conditions. These can prevent safe remote start.
Causes of Remote Start Failure
Jeep Grand Cherokee owners often face problems with their remote start. Knowing what might go wrong helps fix issues fast and right.
Several key factors can stop your remote start from working:
- Low key fob battery causing communication interruptions
- Improper vehicle positioning (not in park)
- Open or unlatched hood sensors
- Activated hazard lights
- Engine diagnostic trouble codes
Weather affects how well your remote start works. Cold weather can make it harder for the system to start your car reliably. About 15% of failures happen when the engine is too hot or the oil pressure is low.
Electronic interference and safety mechanisms protect your car. The system won’t start if:
- The vehicle is in drive or reverse
- Key fob is inside the vehicle
- Check Engine Light is illuminated
- Door locks are not in the correct position
Regular maintenance and knowing these common problems can make your Jeep Grand Cherokee’s remote start more reliable.
Key Fob-Related Issues and Solutions
Jeep Grand Cherokee remote start problems often start with key fob malfunctions. Knowing these issues can save you time and frustration when fixing your vehicle’s remote start system.
Key fobs are key to the Jeep Grand Cherokee’s remote start. Battery replacement and maintenance are vital for reliable performance.
Battery Replacement Tips
If your Jeep Grand Cherokee remote start isn’t working, the key fob battery might be the problem. Here are some important replacement tips:
- Use fresh CR2032 lithium batteries
- Check battery orientation carefully
- Replace batteries every 2-3 years
- Avoid touching battery contacts directly
Cleaning Contact Points
Dirt and corrosion can block key fob signal transmission. Cleaning them can fix the issue:
- Gently open the key fob
- Use electronic contact cleaner
- Clean metal contacts with a soft cloth
- Let contacts dry completely
Programming Issues
Remote start programming can get disrupted, causing problems. Look out for these signs:
| Symptom | Potential Cause |
|---|---|
| No response from remote | Deprogrammed key fob |
| Intermittent button function | Worn internal contacts |
| Single button working | Partial circuit damage |
Pro tip: If multiple fobs fail at once, you might need a professional to fix your Jeep Grand Cherokee’s remote start system.
Electronic System Malfunctions in Cold Weather
Cold weather can be tough on the Jeep Grand Cherokee’s remote start system. When it gets chilly, the electronic parts get more sensitive. This can lead to malfunctions that stop your remote start from working.
Several key factors affect how well the remote start works in the cold:
- Battery voltage reduction
- Sensor sensitivity changes
- Electronic system responsiveness
- Lubrication viscosity alterations
Jeep Grand Cherokee remote start issues in cold weather often come from specific electronic weaknesses. The car’s complex electronic systems can act strangely in low temperatures.
| Cold Weather Issue | Potential Impact |
|---|---|
| Battery Performance | Reduced electrical output |
| Sensor Functionality | Delayed or inconsistent responses |
| Electronic Control Units | Increased system resistance |
Preventive maintenance is key to avoiding remote start failures in winter. Regular system checks and battery health monitoring can greatly reduce unexpected electronic malfunctions.
Cold weather doesn’t have to mean remote start complications for your Jeep Grand Cherokee.
Drivers need to know that temperature changes affect electronic system performance. Keeping your vehicle in a garage, checking battery health, and doing seasonal electronic system checks can help avoid cold-weather remote start problems.
Vehicle Security System Interference
Your Jeep Grand Cherokee’s security system is key to keeping your vehicle safe. Yet, it can sometimes stop the remote start from working right. It’s important to know how these systems work together to fix problems.
The security system checks many things to keep your car safe. If it doesn’t meet certain conditions, it might stop the remote start. This is to protect your vehicle.
Door Lock Sensor Complications
Door lock sensors can cause false alarms that stop remote start. They might not work right for many reasons:
- Damaged door lock mechanisms
- Misaligned sensor connections
- Electrical system irregularities
- Corrosion in sensor contact points
Security System Reset Procedures
Resetting the security system can fix issues with the remote start. Here’s how to do it:
- Disconnect vehicle battery for 5-10 minutes
- Reconnect battery and restart vehicle
- Cycle key in ignition three times
- Verify remote start functionality
If problems keep happening, special tools can find the problem. They help figure out why the remote start won’t work.
| Security System Issue | Potential Impact on Remote Start |
|---|---|
| Sensor Misalignment | Prevents Remote Start Activation |
| Key Fob Synchronization Problem | Blocks Authentication |
| Electrical System Interference | Disrupts Remote Start Signal |
Professional diagnostic services can provide detailed solutions for complex security system issues. They help fix problems with your Jeep Grand Cherokee’s remote start.
Jeep Grand Cherokee Remote Start Not Working: Diagnostic Steps
When your Jeep Grand Cherokee remote start fails, knowing how to diagnose it can save you time and stress. Start by checking the instrument cluster for error codes. These codes can give you clues about what’s wrong.
Here are key steps to diagnose Jeep Grand Cherokee remote start issues:
- Check Instrument Cluster Error Codes
- Look for specific codes like low fuel, open hood, or door status
- Error codes reveal underlying issues preventing remote start
- Verify Neutral Safety Switch
- Confirm OBD-II code P0850 for possible switch malfunction
- Test starting in park and neutral positions
- Perform Basic Vehicle Checks
- Ensure all doors are completely closed
- Check fuel level is sufficient
- Verify transmission is in correct position
If your Jeep keeps having remote start problems, you might need a pro to help. Modern cars have complex systems that need special tools to fix.
Pro Tip: Keep your key fob battery fresh and clean contact points to minimize remote start complications.
Jeep Grand Cherokee remote start issues can come from many places. They can be as simple as a dead battery or as complex as a system glitch.
Essential Pre-Start Conditions for Remote Starting
Getting your Jeep Grand Cherokee ready for remote start needs careful steps. Knowing these steps helps avoid problems and makes starting easy every time.
Vehicle State Requirements
Before you start, your Jeep Grand Cherokee must meet some key conditions:
- Ensure all doors are completely closed
- Verify the vehicle is fully locked
- Check that the hood is securely shut
- Confirm sufficient fuel level in the tank
Safety Checks and Starting Sequence
The remote start system has safety features to keep your vehicle safe. Here’s how to start it right:
- Press the lock button on your key fob
- Double-tap the remote start button within 3-5 seconds
- Wait for vehicle confirmation (typically lights flashing)
Some electronic systems can affect remote start. Jeep Grand Cherokee remote start not working often has a simple fix. Just follow the right steps before starting.
| Condition | Requirement | Impact on Remote Start |
|---|---|---|
| Door Status | Must be closed | Prevents unauthorized start |
| Vehicle Lock | Must be locked | Activates security protocol |
| Fuel Level | Minimum quarter tank | Ensures proper engine operation |
The Role of Check Engine Light in Remote Start Functionality
If your Jeep Grand Cherokee remote start isn’t working, the check engine light might be the problem. This small light on your dashboard is key to your car’s systems, including the remote start.
A flashing or steady check engine light can turn off your remote start. This is a safety step. It stops the engine from starting if there’s a problem.
- Remote start functionality is automatically blocked when check engine light is on
- Diagnostic trouble codes can prevent remote start activation
- Some issues like a loose gas cap can trigger the warning light
Fixing the check engine light can cost between $88 to $111. Many service centers offer free checks to find out why your remote start isn’t working.
| Light Status | Remote Start Impact | Recommended Action |
|---|---|---|
| Steady Check Engine Light | Disabled | Schedule diagnostic test |
| Flashing Check Engine Light | Completely Blocked | Immediate professional inspection |
Check engine lights can turn on for many reasons. These include damaged oxygen sensors, dirty mass airflow sensors, and bad spark plugs. These problems can affect your remote start and need quick fixing.
Proper Remote Start Button Sequence Techniques
Learning to use the Jeep Grand Cherokee remote start can be challenging. Each car model has its own button sequence for starting it from afar. Knowing these steps can help avoid frustration when trying to start your car remotely.
For most Jeep Grand Cherokee models, the remote start sequence is as follows:
- Make sure the vehicle is fully locked
- Press the lock button first
- Then, press the remote start button twice in a row
The secret to a successful Jeep Grand Cherokee remote start is in being precise. Unlike older models, newer ones need a more exact method. This change can surprise many drivers, making it hard to switch between models.
Pro tip: Always check that your car is locked before trying to start it remotely. Some key fobs need a certain timing between button presses. So, practice the sequence to get used to your Jeep Grand Cherokee model’s needs.
The right button sequence can make all the difference between a successful start and a frustrating moment.
If you’re having trouble with your Jeep Grand Cherokee remote start, check your car’s manual or talk to a professional. They can give you specific advice for your model that might fix the startup problems.
Door Lock and Handle Sensor Complications
Jeep Grand Cherokee remote start systems can face unexpected issues with door lock and handle sensors. These parts are key to the vehicle’s security and remote start. They play a vital role.
Modern vehicles have electronic sensors that can sometimes have problems. For Jeep Grand Cherokee owners, these sensors might be the cause of remote start troubles.
- Sensor misalignment can interrupt remote start signals
- Dirt or moisture buildup may cause sensor malfunction
- Electrical system inconsistencies impact sensor performance
Fixing Jeep Grand Cherokee remote start problems involves checking these sensors closely. Experts suggest looking at sensor connections and electrical paths.
| Sensor Problem | Potential Impact | Recommended Action |
|---|---|---|
| Handle Sensor Glitch | Intermittent Remote Start Failure | Professional Diagnostic Scan |
| Door Lock Sensor Misalignment | Security System Interference | Sensor Recalibration |
| Electrical Connection Issue | Complete Remote Start Failure | Comprehensive Wiring Check |
Statistically, nearly 99% of remote start complications stem from improper installations or unaddressed sensor issues. Vehicle owners should get professional help for ongoing remote start problems.
Keeping up with maintenance and watching over sensor health can avoid Jeep Grand Cherokee remote start issues. If unsure, it’s best to talk to a certified auto electronics expert.
When to Seek Professional Diagnostic Services
When your Jeep Grand Cherokee remote start isn’t working, some problems are too complex for DIY fixes. Professional diagnostic services are key when you’ve tried everything and issues persist. Advanced tools can find electrical or system problems that are hard to spot.
At places like Larry H. Miller Chrysler Jeep Dodge Ram, experts can check your Jeep’s remote start. The cost for this service is usually between $88 and $111. This is a small price compared to what fixing undiagnosed problems can cost.
Watch for signs that you need a pro. These include error codes that keep coming back, remote start that works sometimes but not others, strange system actions, or a check engine light that won’t go off. Experts use special tools to find exact error codes and check your engine thoroughly.
When usual fixes don’t work, it’s time to call in the experts. They can find problems like bad sensors or electrical issues fast. This saves you time and money on future repairs.
FAQ
Why won’t my Jeep Grand Cherokee remote start work?
There are many reasons why it might not work. These include a low key fob battery, security system issues, or cold weather problems. Other causes are a check engine light, or using the wrong button sequence.
Common issues include battery problems, sensor malfunctions, or not meeting pre-start conditions. This could be an open door or not enough fuel.
How do I know if my key fob needs a new battery?
If your key fob’s battery is weak, you might notice a few things. The signal range could be lower, or the remote start might not work right. Also, button responses might be weak or not consistent.
Replace the battery with the type your owner’s manual suggests. This is usually a CR2032 or CR2025 lithium battery.
Can cold weather affect my remote start system?
Yes, cold weather can really affect your remote start system. It can make the battery work less well, cause sensor problems, and put extra strain on your car’s electrical parts. This might stop your remote start from working.
What pre-start conditions must be met for remote start to work?
Your Jeep Grand Cherokee needs certain things to start remotely. All doors must be closed and locked, and there must be enough fuel. The hood also needs to be closed, and there can’t be any check engine light on.
Also, the vehicle must be in park with the transmission in the right position.
How do I troubleshoot my remote start not working?
First, check the key fob battery and make sure all doors are closed. Also, check the fuel level and look for any error codes on the instrument cluster.
Make sure you’re using the right button sequence and that no security system alerts are active.
Can the check engine light prevent remote start?
Yes, it can. An illuminated check engine light is a safety feature. It stops the remote start system from working. This is to prevent starting the vehicle when there might be a serious mechanical problem.
How do I reset my Jeep Grand Cherokee’s remote start system?
To reset the system, try disconnecting the vehicle’s battery for a few minutes. You can also reprogram the key fob or follow the reset procedure in your owner’s manual. If problems continue, you might need professional help.
When should I seek professional help for remote start issues?
If you’ve tried basic troubleshooting and the problem persists, it’s time to seek professional help. This is also true if you’re seeing persistent error codes or if the issue is complex and you can’t fix it yourself.
