Okay, from your description, it sounds like the ECM has failed. It controls the injectors and could also be the reason you cannot get it to communicate.
Replacement of the Electronic Control Module (ECM) consists of a service controller, without a PROM (CAL-PAK).
If the diagnostic procedures require the ECM to be replaced, the ECM, PROM (CAL-PAK) should be checked for the correct part number. If they are correct, remove the PROM (CAL-PA K) and install them in the service controller. The service controller will not contain a PROM (CAL-PAK).
IMPORTANT: When replacing a production ECM with a service controller, transfer the broadcast DTC and production ECM part number to the controller label. Do not record information on the access cover.
NOTE: The ignition must be "OFF, " when disconnecting or reconnecting the ECM connector, to prevent internal damage to the ECM.
NOTE: To prevent possible Electrostatic Discharge damage to the ECM, Do Not touch the connector pins or soldered components on the circuit board.
REMOVE OR DISCONNECT
1. Negative battery cable.
2. Glove box panel.
3. Mounting brackets and/or retainers.
4. PCM from tray.
5. PCM harness connectors.
6. Access cover and PROM (CAL-PAK).
INSTALL OR CONNECT
1. PROM (CAL-PAK) and access cover on new PCM.
2. Mounting brackets and module(s).
3. PCM into tray until clips lock.
4. PCM harness connectors.
5. Glove box panel.
6. Negative battery cable.
7. Perform functional check.
Tuesday, June 25th, 2019 AT 2:35 AM