Engine Control Module: Service and Repair

ECM

REMOVE OR DISCONNECT:

1. Negative battery cable.
2. Interior access panel.
3. Connectors from ECM.

NOTE: To prevent possible electrostatic discharge damage to the ECM, DO NOT touch the connector pins or soldered components on the circuit board.

INSTALL OR CONNECT:

1. New ECM.
2. ECM connectors to ECM.
3. Negative battery cable.
4. interior access panel.
5. Proceed to "EEPROM Programming."

EEPROM PROGRAMMING

1. Set-up:

^ Battery is charged.
^ Ignition is "ON."
^ Battery/cig. lighter connection secure.
^ Data Link Connector (DLC), formerly ALDL, must be secure.

2. Refer to up-to-date Techline or Scan tool terminal/equipment for user's instructions.

3. If ECM fails to program, do the following:

^ Check all ECM connections.