Lumina L4-151 2.5L (1991)
Engine Control Module: Service and Repair
Throttle Body Fuel Injection
ECM Mounting
When replacing a production ECM with a service ECM, transfer the broadcast code and production number from the production unit to the service unit.
Also, during replacement, the PROM, CALPACK and if equipped, the MEMCAL must be removed from the ECM being replaced and transferred to the
new unit. Refer to PROM, CALPAK, and MEMCAL for procedures.
1.
Disconnect battery ground cable.
2.
Then disconnect computer electrical connectors.
3.
Remove computer mounting hardware.
4.
Remove computer from passenger compartment.
5.
Reverse procedure to install.
