Fleetwood FWD V8-300 4.9L (1993)
Engine Control Module: Service and Repair
Powertrain Control Module (PCM)
Powertrain Control Module (PCM) Replacement
Powertrain Control Module (PCM)
Service of the PCM should normally consist of either replacement of the PCM or a MEM-CAL change. If the diagnostic procedures call for the PCM
to be replaced, the Memory-Calibration unit (MEM-CAL) and PCM should be checked first to see if they are the correct parts. Also, perform the
'PCM Replacement Check' chart in this section before replacing a PCM to assure that the replacement PCM will not be damaged. The PROM can
easily be checked using parameter P.2.5. If the part numbers are correct, remove the MEM-CAL from the faulty PCM and install them in the new
service PCM. THE SERVICE PCM WILL NOT CONTAIN A MEM-CAL, so care should be taken when removing the MEM-CAL from a defective
PCM which is being replaced. Trouble Code F32 (No PCM Data) indicates the MEM-CAL is installed improperly or has malfunctioned. If Code F32
is current, check to see if the MEM - CAL is fully seated. If not fully seated, press firmly on the ends of the MEM - CAL and make sure the retaining
clips have locked. If the MEM-CAL is installed correctly and Code 'F32' still shows, diagnose using the code chart for F32. After replacement of an
PCM, clear stored codes, and check the vehicle for proper operation.
NOTICE: To prevent internal PCM damage, the ignition must be 'OFF' when disconnecting or reconnecting power to PCM (for example, battery
positive cable, PCM connectors, PCM fuse, jumper cables, etc.).
Remove or Disconnect
