Powertrain Control Module: Notes
CAUTION:
Electronic components used in control systems are designed to carry very low voltages. As little as a 30-volt charge created by static electricity can cause a total or degrading failure in PCM or other electronic components containing integrated circuits. Before servicing PCM, technician and work area must be grounded to discharge static electricity.
CAUTION:
DO NOT remove part from packaging until ready to install. Ground any static-proof package before opening. DO NOT touch electrical terminals of components unless properly grounded. DO NOT lay electrical components on car seat, carpeting or dashboard. Use electrostatic protection mat and ground strap whenever possible.
NOTE:
If replacing PCM with a service PCM, transfer broadcast code and production PCM number to service PCM label. This will allow for positive identification of PCM throughout service life of vehicle. Check resistance values of all PCM relays, solenoids, and other output controls before replacing or substituting PCM. Check all sensor wiring and PCM output control circuits for a short to ground before replacing or substituting PCM. Perform all circuit repairs or malfunctioning component part replacements before installing a replacement or substitute PCM. This will prevent damage to replacement or substitute PCM. Turn ignition switch to LOCK position when installing, removing PCM connectors and disconnecting or reconnecting power to PCM to prevent internal PCM damage. Service of PCM consists of a complete replacement of PCM. There are no serviceable parts, such as Programmable Read-Only Memory (PROM) or Erasable Programmable Read-Only Memory (EPROM) to replace inside PCM. If PCM is determined to be faulty, PCM is to be replaced as a complete assembly.