Is there a way to reset the PCM?
This is the way I have always done it. Disconnect the POSITIVE battery Terminal and touch it to ground for 30 seconds. (This is to discharge the PCM capacitors, which maintain the Adaptive Memory. When you start the engine it will be running off a set of pre-programmed tables that come with the PCM from the factory.
How do you reset the PCM on a Ford Focus?
Step 1 Open the hood of the Ford. Loosen the lock nut located on the negative battery cable connector with a socket and ratchet. Wait for 20 minutes while the PCM bleeds off the electricity it stores for backup power. Once the power drains from the PCM, it resets.
Why do I need to Reset my ECM?
If your check engine light comes on then chances are there may be an internal electrical issue within your vehicle that must be addressed. Before replacing any parts you want to reset your ECM to ensure that part replacements are absolutely necessary. There are a few ways to reset your Engine control modules.
What does a trouble code on a PCM mean?
When the PCM detects a problem with one or more of the vehicle’s components or systems it stores a trouble code in its internal memory and illuminates a malfunction indicator light (MIL) on the dashboard. An automotive scan tool is required to clear the codes and reset the PCM.
How do you reset the PCM on a Ford?
Open the hood of the Ford. Loosen the lock nut located on the negative battery cable connector with a socket and ratchet. Pull the connector off the negative battery terminal. Wait for 20 minutes while the PCM bleeds off the electricity it stores for backup power. Once the power drains from the PCM, it resets.
What to do if your PCM wont turn on?
This can often resolve small issues that you may experience with the Ford. Open the hood of the Ford. Loosen the lock nut located on the negative battery cable connector with a socket and ratchet. Pull the connector off the negative battery terminal. Wait for 20 minutes while the PCM bleeds off the electricity it stores for backup power.
Why do I need to Reset my PCM on my Dodge Ram?
There are other reasons why you would need to reset the PCM, such as after the installation of aftermarket components that require a PCM reset so the truck can fully adjust to new components. The reset procedure in your Dodge Ram is as easy as they come.
How does a PCM have to be retested?
The PCM has to be hooked up to a sophisticated simulator that exercises all of the computer’s input and output circuits to make sure it works correctly – which means the PCM has to go back to the supplier, be retested, and if no fault is found, repackaged and put back into stock.