Grand AM L4-138 2.3L DOHC VIN D MFI (1994)
Engine Control Module: Service and Repair
PCM Location.
When replacing a production PCM with a service PCM, transfer the broadcast code and production number from the production unit to the service unit.
The MEMCAL/PROM must be removed from the PCM being replaced and transferred to the new unit.
REMOVE
1. Disconnect battery ground cable.
2. Right hand kick panel.
3. Disconnect computer electrical connectors.
4. Remove computer mounting hardware.
5. Remove computer from passenger compartment.
INSTALL
1. Reverse procedure to install.
2. Perform FUNCTIONAL CHECK to verify proper installation.
Data Link Connector (DLC) - Located Underdash
FUNCTIONAL CHECK
1. Turn ignition "ON."
2. Enter DIAGNOSTIC MODE by jumpering the Data Link Connector (DLC) terminals "A" to "B" with key "ON" engine "OFF." A code 12 should
flash four times if no other codes are present. This indicates the MEM-CAL/PROM is installed correctly and the PCM is functioning.
