How do I reset my Jeep PCM?

How do I reset my Jeep PCM?

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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.

Can you replace a PCM?

Replacement of the PCM is not very common, but when your Vehicles is diagnosed with a failing PCM it’s important to replace it immediately to ensure the Vehicles continues to operate. You can replace the PCM without the help of a mechanic, but you must first purchase the correct PCM Vehicles your car.

Can you drive with a bad PCM?

A failed PCM or TCM can cause the car to get stuck in gear, which can be a serious safety issue. It can also lead to costly transmission damage.

When should I replace my PCM?

Signs Your ECM or PCM Might Need Replacing Engine Performance Issues – You’ll notice a reduction in fuel efficiency, power, and acceleration. Car Not Starting – Your vehicle does not start or is difficult to start. The engine may still crank but won’t be able to start without vital inputs from the computer.

What is a PCM unlock?

GM PCM Unlocking Service A locked PCM means that you can not read, write, or erase the PCM (not even the dealer can put it back to stock). The problem is often the tuner shops that do this go out of business, or worse you purchased the vehicle used and do not know who locked it.

What causes a PCM to fail?

PCMs typically fail for one of two reasons: voltage overloads (often due to a short in a solenoid or actuator circuit) or environmental factors (corrosion, thermal stress or vibration). If water gets inside a PCM, it can short circuits and set up irreversible corrosion that ruins electronic connections.

What does a PCM control?

The PCM controls ignition timing, fuel delivery, valve timing in engines with Variable Valve Timing), emissions functions, turbo boost pressure in turbocharged engines, idle speed, throttle position and cruise control.