answersLogoWhite

0


Best Answer

Powertrain Control Module

It's the computer mounted to the firewall with the three sets of wires going to it. It handles all sensors, warning lights, transmission shifting (if electric), spark ignition, electronic choke..... Pretty much everything electric is handled by the PCM.

User Avatar

Wiki User

14y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: What is a pcm and what does it do on a 1990 B250 Dodge van?
Write your answer...
Submit
Still have questions?
magnify glass
imp