If problem re occur few month later, mark sure tell them the history of this replacement. same dealer have computer record, other will not have it.
Because PCM is the main brain for decision making. It will send output action ONLY after receiving a sensor request signal. Example, Shift lever position sensor, Gear position sensor. these two sensor must have a agreement to each other, said shift lever at "D" position, Gear position at "Natural" then out put And Brake switch is “OFF”, A basic logic (If, Else, then), after all condition is meet, internal clutch will be energized transform engine power to transmission which is turning output shaft to run the car. so, replaced PCM is just a Quick and Dirty repair.
Automatic Transmission is all based on INPUT (Sensor position), PCM ROGRAM (Activity Decision), and an OUTPUT (Clutch Engagement) to get the car moving
Because PCM is the main brain for decision making. It will send output action ONLY after receiving a sensor request signal. Example, Shift lever position sensor, Gear position sensor. these two sensor must have a agreement to each other, said shift lever at "D" position, Gear position at "Natural" then out put And Brake switch is “OFF”, A basic logic (If, Else, then), after all condition is meet, internal clutch will be energized transform engine power to transmission which is turning output shaft to run the car. so, replaced PCM is just a Quick and Dirty repair.
Automatic Transmission is all based on INPUT (Sensor position), PCM ROGRAM (Activity Decision), and an OUTPUT (Clutch Engagement) to get the car moving