Engine Control Module Replacement: Notes
Service of the engine control module (ECM) should normally consist of either replacement of the ECM or electrically erasable programmable read only memory (EEPROM) programming. If the diagnostic procedures call for ECM replacement, inspect the ECM first to see if the replacement is the correct part. If the ECM is faulty, remove the ECM and install the new service ECM.
The new service ECM will not be programmed. You must program the new ECM. DTC P0602 indicates the EEPROM is not programmed or has malfunctioned.
CAUTION:
In order to prevent any possible electrostatic discharge damage to the ECM, do not touch the connector pins or the soldered components on the circuit board.
CAUTION:
Always turn the ignition off when installing or removing the ECM connectors in order to prevent damage to the components.