How do you reset the computer on a Jeep Cherokee?

How do you reset the computer on a Jeep Cherokee?

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.

What are the most common problems with the Jeep Cherokee?

Top Jeep Cherokee Problems

• Engine Oil Leaks From Valve Cover, Oil Pan, and Timing Cover Gaskets.
• Throttle Position Sensor May Fail.
• Ignition wires may fail and cause engine performance problems.
• Exhaust Manifolds Can Crack Where Pipes Are Welded.
• Front and Rear Differential Pinion Seal and Transfer Case Leaks.

How can I test my car computer?

How to Test an Automobile Computer

1. Compile a resource list before running diagnostics on your automobile.
2. Locate a second set of OBD-II codes.
3. Open the driver’s side door.
4. Connect your OBD-II scanner to its diagnostic cable.
5. Put your key into your automobile’s ignition and turn to the “On” position.

How do I test if my ECU is bad?

Here are the most common symptoms of a bad ECU:

1. Check Engine Light stays on after resetting.
2. Car was jump started on reverse polarity.
3. Engine turning off for no reason.
4. Water Damage or Fire Damage on the ECU.
5. Apparent loss of spark.
6. Apparent loss of injection pulse or fuel pump.
7. Intermittent starting problems.
8. Overheating ECU.

How do you reset the computer on a 1999 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.

What are the problems with a 1999 Jeep Grand Cherokee?

Worst 1999 Jeep Grand Cherokee Problems #1: Engine Stalls/Shuts Down While Driving 1999 Grand Cherokee Average Cost to Fix: $1,000 #2: Excessive Noise From Rear End 1999 Grand Cherokee Average Cost to Fix: $1,400 #3: Overheating Caused Engine Failure 1999 Grand Cherokee Average Cost to Fix: $3,300

What are some of the 2000 Jeep Grand Cherokee PCM problems?

Corrosion, shorts, and loose connections can contribute to PCM issues, especially to 2000 Jeep Grand Cherokee PCM problems. Owners reported this specific problem with the electrical system. You need to perform a soldering repair to fix these bad connections.

What are some of the problems with the 1994 Jeep Grand Cherokee?

Jeep Cherokee has difficulty starting. Like the Check Engine light issue, this part of the 1994 Jeep Grand Cherokee PCM problems stems from a faulty PCM providing wrong input to the vehicle. When this happens, ignition or starting issues occur.

What does the PCM do on a Jeep Cherokee?

One function of the Jeep Cherokee PCM is to control fuel injection and determine the right time to switch gears. If the PCM is faulty, it can lead to stalls or rough idling.