Where is the body control module on a 1997 Jeep Grand Cherokee?

Your BCM is located under the dash towards the bottom left of your steering column. Remove the bottom panel and there are 3 plugs going into it.

What does the powertrain control module control?

The powertrain control module, aka PCM, is your vehicle’s brain. It manages the engine, transmission and other systems based on information it receives from various sensors around the vehicle.

How do you reset the PCM on a Jeep Cherokee?

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

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.

Does a Body Control Module have to be programmed?

Most BCMs need to be programmed by the remanufacturer or a shop equipped with the proper tools. If the replacement BCM needs programming, it must be programmed with the latest operating software and vehicle calibrations.

How do I reset my powertrain control module?

Resetting the PCM on your vehicle will help to clear all codes from it after a problem is fixed.

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.

How do you reset the PCM?

In order to perform a PCM hard reset: Press and hold the PCM Info button for approximately 10 seconds until the PCM reboots.

What happens when your PCM goes bad?

A malfunctioning PCM will activate dashboard error lights. In fact, you can expect that these lights will flash off and on if the PCM is not able to read the sensors correctly. Your vehicle performance will suffer greatly and may go into limp-mode.