2001 Jeep Grand Cherokee Security System Reset

The 2000 Jeep or 2001 Jeep Cherokee or other year models use an anti-theft or security system called SKIM (Secured Key Immobilizer Module). This won’t let the car start unless the correct programmed key fob is detected.

This alarm system sends a radio frequency signal to verify the key is present. If the SKIM module does not detect the correct key code, it will disable the fuel injectors to stop the engine from starting.

This can cause issues like a no-start condition or the security light coming on. There are a few reasons you may need to reset the SKIM system security on your 2001 Jeep Grand Cherokee – replacing the battery, installing new ignition components, damaged key fobs, or an engine that cannot start can all be fixed by resetting the system.

For example, the SKIM must be programmed with the vehicle’s VIN code and key fob. It would take labor to replace faulty parts and do the programming.

2001 Jeep Grand Cherokee Anti-Theft System

The process involves turning the ignition on-off-on, disconnecting the battery for at least 90 seconds, and then reconnecting and reprogramming new keys. This resets the SKIM module and clears any old key codes from memory. Following these steps can resolve many problems caused by a faulty security system, or you may need to take it to a dealer if the following doesn’t fix the issue.

But if resetting it does not allow the engine to start; there may be other underlying issues that require advanced troubleshooting.

In our guide, you can learn more about resetting the Jeep Grand Cherokee Laredo immobilizer system and what could cause it. By the end, you’ll better understand how to reset your anti theft system if you have issues between your car and when you insert your key. (Read Pt Cruiser AC Compressor Wont Come On)

What Is the Anti-Theft System on a 2001 Jeep Grand Cherokee?

The 2001 Jeep Grand Cherokee uses a security system called SKIM (Secured Key Immobilizer Module). This anti-theft system is designed to prevent the engine from starting unless a coded key programmed to the vehicle is used.

When powered on, the SKIM module sends a radio frequency signal to the key fob to verify it is present. If the correct key is not detected, the SKIM system will disable the fuel injectors to prevent the engine from starting. A security light on the instrument panel alerts the driver if there is an issue.

Why Would You Need to Reset the Anti-theft Device?

There are a few common reasons why you may need to reset the anti theft security system on your 2001 Jeep Grand Cherokee:

  • The engine fails to start – If the security key symbol light is on and the engine will not start, there is likely an issue with the SKIM system. Resetting it can resolve this.
  • Replacing the battery – Disconnecting the battery can trigger the security system. A reset may be required to get the car engine running again.
  • Installing new components – A new ignition switch, PCM, or other components may need a SKIM reset before the Jeep will start.
  • Key fob issues – Damaged key fobs or replacing all keys may require resetting the system.
  • Using Lock Cylinder and Key to unlock driver door lock: Do you frequently use the key to unlock the door? The driver’s door may override the function of the key fob and the anti-theft device.

Resetting the SKIM system can typically resolve these issues and allow the engine to start normally again.

Steps to reset the anti-theft system on a 2001 Jeep Grand Cherokee

How to Reset the Security System on a 2001 Jeep Grand Cherokee

Here are the steps to reset the anti-theft system on a 2001 Jeep Grand Cherokee Ltd:

Check the Key Fob Battery

Before attempting a reset, first check the battery in your key fob. If the battery is weak, it can prevent the SKIM system from reading the key code. Replace the battery if needed. Check the fuse box in case the fuse has blown. (Read 275 55r20 Vs 275 60r20 Tire Comparison)

Turn Ignition On-Off-On

With a correctly coded key, insert the key and turn the ignition switch to the ON position, but do not start the engine. Leave it on for about 5 seconds until the security light stops flashing and stays on solid.

Turn the key to the OFF position and leave it for 10-15 seconds. Finally, turn the key back to the ON position.

Attempt to Start the Engine

Try to start the engine. If it starts and runs normally, the security system reset is successful.

If it fails to start, you will likely need to reset the codes in the SKIM module. Move on to the next steps.

Disconnect Battery

Pop the hood and locate the battery. Disconnect the negative battery cable and isolate it so it does not make contact again.

Wait at least 90 seconds before reconnecting the battery cable to allow the system to reset completely.

Reconnect Battery

Reconnect the negative battery cable. This will reset the SKIM module and clear any old key codes from memory.

Program New Keys

You must now program new key codes into the SKIM system. Ensure every door lock is in the locked position and insert the first newly cut key into the ignition.

Turn the key to the ON position for at least 3 seconds, then back to OFF. Repeat this process for the remaining keys. The security theft light should turn off, showing that the programming is complete. (Read Can You Flat Tow A Mini Cooper)

Start Jeep

Finally, insert a newly programmed key and start the engine. It should turn over and start up normally, and the alarm goes off as it should. If it fails to start, an underlying issue may require diagnosis.

Note: Sometimes, unlocking your doors using the key fob, not the door key, can reset the anti-theft system and start the engine. If it doesn’t work, press and hold the panic button multiple times, or unlocking and locking the doors can help reset the alarm system.

Another quick fix to unlock the car can be:

  1. Put the key in the driver side door.
  2. Turn twice to the right and once to the left to unlock the door.
  3. Use the key to start the engine.

What If a Reset Does Not Let a Car Start?

Sometimes, resetting the security system may not resolve the no-start problem. Here are some steps to troubleshoot further:

  • Inspect key fobs – Ensure proper signal is being sent. Program new keys if necessary.
  • Check for fault codes – Any SKIM module fault codes must be diagnosed and addressed.
  • Verify PCM operation – The Powertrain Control Module works with SKIM and may not signal properly.
  • Inspect wiring – Damage to a SKIM module or related wiring can prevent the system from resetting correctly.
  • Replace SKIM module – If faulty, the entire SKIM component may need replacement to restore proper function.

Resetting the system is usually the first step in resolving security system issues. But if problems persist, more advanced troubleshooting and repair may be required. Consulting a repair shop is recommended if you get stuck.

Note: A rubber boot and thick brown power wire with a white stripe are on the passenger side door. This can get broken from wear or pinching. You may find this more common in the 1999 model year up to 2003 Jeep models more than later models.

Start problem issues 2001 Jeep Grand Cherokee


The anti-theft security system on the 2001 Jeep Grand Cherokee Limited Edition can cause frustrating start problem issues, but resetting the SKIM module can often resolve these problems.

Follow the steps to turn the ignition on and off, disconnect battery cables to reset the system, and reprogram new keys.

This Jeep Cherokee reset procedure clears fault codes and gets the SKIM module working properly again. If problems persist, inspect key fobs to ensure proper signal, check for SKIM fault codes, verify PCM operation, and inspect wiring integrity.

Repair or replace any faulty components. With some time and patience, you can troubleshoot any remaining issues and get your 2000 Grand Cherokee or 2001 Grand Cherokee engine turning over and starting again.

The security system prevents theft as the car wont start without the proper key signal, but it doesn’t have to leave you stranded. Arm yourself with the knowledge to reset it and get back on the road. If all else fails, it’s best to take your vehicle to a locksmith or dealer to resolve the issue. (Learn How To Turn Off Advancetrac)


How do I reset the anti-theft system if the battery is disconnected?

After reconnecting the battery, turn the ignition key on and off and program new keys as outlined above. This will reset the SKIM system.

Will a locksmith be able to reset the security system?

Most locksmiths can reset SKIM by following the battery disconnect procedure. But programming new keys will need to be done through a dealership.

Why won’t my 2001 Jeep start even after a security system reset?

Other issues like a bad fuel pump, failed PCM, or wiring problems can prevent starting. Have the Jeep diagnosed if a reset does not allow it to start.

How much will it cost me to reset the security system?

DIY resets can be done for free if you follow the right steps. Most mechanics charge $50-$150 for a system reset; key programming is extra. Dealerships typically charge 1-2 hours of labor.

How to get 2001 Jeep Grand Cherokee out of anti-theft mode?

Turning the ignition on and off and then disconnecting the battery for a complete reset will take it out of anti-theft mode. Be sure to program new keys after resetting the system.

2001 Jeep Grand Cherokee Security System Reset