Seville V8-273 4.5L (1989)
Engine Control Module: Service and Repair
Body Computer Module (BCM)
Service of the BCM should normally consist of either replacement of the BCM or a MEM-CAL change. If the diagnostic procedures call for the BCM to
be replaced, the Memory-Calibration unit (MEM-CAL) and BCM should be checked first to see if they are the correct parts.
When replacing a production BCM with a service BCM, transfer the broadcast code and production number from the production unit to the service unit.
Also, during replacement, the PROM, and the MEM-CAL must be removed from the BCM being replaced and transferred to the new unit.
1.
Disconnect battery ground cable.
2.
Then disconnect two computer electrical connectors.
3.
Remove computer mounting hardware.
4.
Remove computer from passenger compartment.
5.
Reverse procedure to install.
