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Home >> Pontiac >> 2001 >> Sunfire L4-144 2.4L DOHC VIN T SFI >> Repair and Diagnosis >> Relays and Modules >> Relays and Modules - Powertrain Management >> Relays and Modules - Computers and Control Systems >> Engine Control Module >> Service and Repair >> Powertrain Control Module (PCM) Replacement

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 in order to prevent internal Powertrain Control Module (PCM) damage when you disconnect or re-connect power to the PCM via the battery cable, the PCM pigtail, the PCM fuse, the jumper cables, or via other components. The ignition switch should be OFF for at least 10 seconds before disconnecting the power to the PCM so the intake air control (IAC) valve has time to move to the engine OFF position.

CAUTION: Refer to Battery Disconnect Caution in Service Precautions.

1. Disconnect the negative battery cable.

CAUTION: Refer to Vehicle Lifting Caution in Service Precautions.

2. Lift the vehicle. Refer to Lifting and Jacking the Vehicle.
3. Remove the right engine splash shield.
4. Disconnect the horn electrical connector.
5. Remove the horn.

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.




6. Disconnect the PCM electrical connectors (1).




7. Remove the PCM attaching bolts (1).




8. Slide the PCM assembly (1) and protective cover (if equipped) from the PCM bracket (2).




9. Remove the protective cover (if equipped and note position)
10. Remove the retainer (1) from the PCM (2).

Installation Procedure

IMPORTANT: Remove the replacement PCM from its packaging. Check the service number to ensure that the number is the same number as the malfunctioning PCM, or an updated number.




1. Slide the PCM (2) into the PCM retainer (1).
2. Reinstall the protective cover (if equipped).




3. Slide the PCM assembly (1) into the PCM bracket slots (2).

NOTE: Refer to Fastener Notice in Service Precautions.




4. Install the PCM attaching bolts (1).

Tighten
Tighten the PCM attaching bolts to 10 N.m (89 lb in).

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.




5. Connect the PCM electrical connectors (1).

Tighten
Tighten the PCM electrical connectors screws to 8 N.m (71 lb in).

6. Install the horn.

Tighten
Tighten the horn retainer bolt to 10 N.m (89 lb in).

7. Connect the horn electrical connector.
8. Install the right engine splash shield.

CAUTION: Refer to Vehicle Lifting Caution in Service Precautions.

9. Lower the vehicle.
10. Connect the negative battery cable.
11. Reprogram the PCM. Refer to Powertrain Control Module (PCM) Programming and perform the Crankshaft Position (CKP) system variation learn procedure. Refer to CKP System variation Learn Procedure. Programming and Relearning
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