Prizm L4-108 1.8L DOHC VIN 8 MFI (1998)
Powertrain Control Module: Service and Repair
Removal
Notice: Check the resistance values of all PCM relays, solenoids, and other output controls before replacing or substituting the Powertrain Control
Module (PCM). Check all the sensor wiring and the PCM output control circuits for a short to ground before replacing or substituting the PCM. Perform
all circuit repairs or malfunctioning component part replacements before installing a replacement or substitute PCM. This will prevent damage to the
replacement or substitute PCM.
Notice: Do not touch the connector pins or soldered components on the circuit board in order to prevent possible electrostatic discharge (ESD) damage
to the PCM.
Notice: Turn the ignition OFF when installing or removing the PCM connectors and disconnecting or reconnecting the power to the PCM (battery cable,
PCM pigtail, PCM fuse, jumper cables, etc.) in order to prevent internal PCM damage.
Important: Service of the Powertrain Control Module (PCM) consists of a complete replacement of the PCM. There are no serviceable parts, such as
Programmable Read Only Memory (PROM) or Erasable Programmable Read Only Memory (EPROM) to replace inside the PCM. If the PCM is
determined to be faulty, the PCM is to be replaced as a complete assembly.
Important: When replacing the production PCM with a service PCM, it is important to transfer the broadcast code and production PCM number to the
service PCM label. This will allow for positive identification of the PCM throughout the service life of the vehicle.
Caution: Refer to Battery Disconnect Caution in Cautions and Notices.
1. Disconnect the negative battery cable.
2. Remove the glove box (1).
3. Remove the console support bracket (2).
4. Remove the left side knee bolster trim panel (4).
5. Remove the left side knee bolster (3).
6. Remove the center trim panel (1).
7. Remove the radio (if equipped) (2).