Alero L4-144 2.4L DOHC VIN T SFI (2000)
Powertrain Control Module: Service and Repair
Powertrain Control Module (PCM) Replacement
NOTE: In order to prevent internal damage to the PCM, the ignition must be OFF when disconnecting or reconnecting the PCM connector.
Service of the PCM should normally consist of either replacement of the PCM or EEPROM re-programming. If the diagnostic procedures call for the
PCM to be replaced, the PCM should be checked first to see if it is the correct part. DTC P0601 indicates the EEPROM programming has
malfunctioned. When DTC P0601 is obtained, re-program the EEPROM.
The ignition should be OFF for at least 10 seconds before disconnecting power to the PCM so the IAC valve has time to move to the engine OFF
position.
REMOVAL PROCEDURE
IMPORTANT: Turn off the ignition to prevent internal PCM damage when the following are being performed:
^
The battery cables are removed and connected.
^
The PCM connectors are removed and connected
^
The PCM fuses are replaced
^
If jumper cables are used to start the vehicle.
The ignition should be off for at least 10 seconds before disconnecting the power to the PCM so the IAC valve has time to move to the correct
position.
CAUTION: Refer to Battery Disconnect Caution in Service Precautions.
1. Disconnect the negative battery cable.
2. Remove the left sound insulator.
3. Loosen the PCM connectors screws (1).
NOTE: Do not touch the PCM connector pins or soldered components on the circuit board in order to prevent possible electrostatic discharge (ESD)
damage. Do not remove the integrated circuit boards from the carrier.
