What is code p1685?

This means that your jeep did not recognize the key that was placed in the ignition. This can happen for a few reasons. Trying to start the engine with a key that is not programed to your jeep or a key that does not have a transponder chip Trying to start the engine with more then one transponder key on the key ring.

How do I get my Jeep out of anti theft mode?

Look for a button that allows you to slide the physical key out of the fob. Step 2: Turn the vehicle key to unlock the car door without releasing it. Hold the key for 30 seconds in this position. This will signal to your car’s system that you have the right key, and will enable you to bypass your car’s alarm system.

How do you reset the computer on a 2000 Jeep 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.
6. Turn the headlights off.

How do you reset the PCM on a Jeep Grand Cherokee?

Jeep Cherokee and Jeep Grand Cherokee 1984-2004: How to Reset ECU

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.

How do you reset the security system on a Jeep 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.

How do I reset my Jeep ECM?

Registered

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.

How do you tell if Jeep PCM is bad?

Common Symptoms of Jeep PCM Failure

1. – The check engine light is on.
2. – Your engine stutters or stalls.
3. – Gas mileage has inexplicably gotten worse.
4. – Your Jeep is shifting erratically or seemingly at random.
5. – Your Jeep has difficulty starting.

How do I reset my Jeep computer?

jeepndon

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.

How do I turn off the security on my Jeep Grand Cherokee?

Open the driver’s side door, with all other doors closed. You’ll then need to press the LOCK button on the key fob. Then, close the driver’s side door and keep all doors closed for at leaSTSRXteen seconds. The security dash light should stop flashing quickly, indicating that the security system has been reset.

How do you reset a Jeep Cherokee computer?

Jeep ECU Reset Procedure

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.

How do I know if my PCM needs to be replaced?

What Are the Symptoms of a Faulty PCM?

1. Your “check engine” light is on.
2. Other warning lights may be on, including traction control and ABS.
3. You lose fuel economy for no apparent reason.
4. Your car stutters when starting, requires multiple attempts, or won’t start at all.
5. Stuttering or stalling during idling.