Engine Control Module Replacement (LAT)

Fig 1: Engine Control Module

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
Preliminary Procedure: Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (With LAT) or Battery Negative Cable Disconnection and Connection (Without LAT) .
1	Engine Control Module NOTE: 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. NOTE: Always turn the ignition off when installing or removing the ECM connectors in order to prevent damage to the components. Procedure Disconnect the electrical connectors. Hold back the clips in order to remove the engine control module (ECM). Program the ECM, if replacing. Refer to Control Module References . Tip: Service of the 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.

Callout

Component Name

Preliminary Procedure:
Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (With LAT) or Battery Negative Cable Disconnection and Connection (Without LAT) .

Engine Control Module

NOTE: 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.

NOTE: Always turn the ignition off when installing or removing the ECM connectors in order to prevent damage to the components.

Procedure

Disconnect the electrical connectors.
Hold back the clips in order to remove the engine control module (ECM).
Program the ECM, if replacing. Refer to Control Module References .

Tip:

Service of the 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.