Question : how to factory reset 99 jeep grand cherokee?

1. Disconnect the battery by removing the positive battery cable.
2. Ground the positive cable to the negative cable for 30 seconds to erase the electric charge in the capacitors.
3. Reconnect the positive cable to the battery.
4. Turn the key to on but do not start.
5. Turn the headlights on.

Also know, how do you reset the security system on a 1999 Jeep Grand Cherokee? Press the power door-lock switch on the keyless entry fob. Close the driver’s side door. Leave all doors closed for about 16 seconds until the Vehicle Security Light on the instrument cluster stops flashing quickly. When the light flashes at a slower rate, this signifies that the system has been reset and rearmed.

Moreover, how do you reset a PCM on a Jeep Grand Cherokee?

1. Step 1 – Prepare to reset the ECU.
2. Step 2 – Disconnect the battery.
3. Step 3 – Ground positive cable to the negative cable.
4. Step 4 – Reconnect the battery.
5. Step 5 – Turn the headlights on and then off.
6. Step 6 – Turn key to the “OFF” position.

Quick Answer, how do you reset a PCM on a Jeep?

1. Disconnect the POSITIVE battery Terminal and touch it to ground for 30 seconds to discharge the PCM capacitors, which maintain the Adaptive Memory.
2. Reconnect the Battery Cable.
3. Turn Ignition Switch to the “On” position but DO NOT start the engine.
4. Turn Headlight On.
5. Turn Headlights Off.
6. Turn Ignition Key Off.

Beside above, how do I reset my Jeep?

How do you reset the anti theft system on a 2000 Jeep Grand Cherokee? Insert your key and turn the drivers side door lock to the right , then left and then right again this will reset the security system.

How do I get my car out of anti theft mode without remote?

Turn the key to unlock your car door, but don’t release it. Hold the key in this position for 20 to 30 seconds. This lets the system know you have the correct key, and it can allow you to bypass the alarm system. Some vehicles recognize the key simply by turning the key back and forth in the door lock key cylinder.

How do I reset my Jeep ECM?

1. Step 1 – Remove the positive (red) battery cable.
2. Step 2 – Ground the red cable to the negative terminal.
3. Step 3 – Reconnect the positive battery cable.
4. Step 4 – Turn on your Jeep.
5. Step 5 – Cycle the headlights.
6. Step 6 – Turn the key off and remove.

How do you reset the PCM?

1. Open the hood of the vehicle.
2. Disconnect the negative battery cable from the battery. Use a wrench to loosen the lock nut, and pull the cable off. This cuts the power to the PCM. Wait for five minutes.

What is the PCM on a Jeep Grand Cherokee?

The Powertrain Control Module (PCM) is the computer that controls most of your Jeep’s essential systems. The PCM controls the engine timing, the fuel to air ratio, the transmission, and the anti-lock brakes, along with dozens of other smaller functions.

How many miles does it take to reset a jeep computer?

For good measure. Anytime that you reset your Jeep PCM you should keep in mind that you will need to drive your car for approximately 10-15 miles so your Jeep ECM can re-learn your driving habits and fuel management.

How do you reset the malfunction indicator light on a Jeep Wrangler?

Turn the key to the ON position without starting the car. Push the key into the ignition cylinder (towards the steering column) and, while holding it in, turn the key to the OFF position and back to the ON position three times. Be sure to end with the key in the ON position.

How do I test my PCM Jeep Wrangler?

Where is the TPMS reset button on a Jeep Grand Cherokee?

To reset the tire pressure monitor or tpms system in your 2018 jeep grand cherokee vehicle, turn the ignition key to the “on” position and depress the tpms button, usually located under the dash, until the tpms light blinks several times.

How do you clear codes on a Jeep?

1. Make sure the engine is not running and key is out of the ignition.
2. Disconnect the battery terminals.
3. Wait 5 minutes.
4. Reconnect battery terminals.
5. Insert and turn the ignition key to the run position without starting.
6. All error codes are cleared and CHECK ENGINE icon disappeared.

How do I reset my jeep battery?

1. disconnect positive battery cable.
2. disconnect negative batter cable.
3. hold both cables together for 30 seconds.
4. connect positive back up.
5. connect negative.