Powertrain Control Module: Notes
WARNING:
Before servicing any electrical component, the ignition key must be in the OFF or LOCK position and all electrical loads must be OFF, unless instructed otherwise in these procedures. If a tool or equipment could easily come in contact with a live exposed electrical terminal, also disconnect the negative battery cable. Failure to follow these precautions may cause personal injury and/or damage to the vehicle or its components.
NOTE:
In order to prevent internal damage to the Powertrain Control Module (PCM), the ignition must be OFF when disconnecting or reconnecting the PCM connector. Service should normally consist of either replacement of the PCM or Electrically Erasable Programmable Read-Only Memory (EEPROM) re-programming. If the diagnostic procedures call for the PCM to be replaced, the PCM should be inspected first in order to verify the PCM is the correct part. DTC P0602 indicates the EEPROM programming has malfunctioned. When DTC P0602 is set, re-program the EEPROM.
NOTE:
When replacing the production PCM with a service PCM, transfer the broadcast code and production PCM number to the service PCM label. Do not record the information on the PCM cover. This will allow positive identification of the PCM parts throughout the service life of the vehicle.