Engine Control Module: Service and Repair

When replacing a production ECM/PCM with a service ECM/PCM, 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/PCM being replaced and transferred to the new unit. Refer to PROM, CALPAK and MEMCAL in this section for replacement procedures.

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.