S15/T15 Sonoma P/U 2WD L4-2.2L VIN 5 Flex Fuel (2001)
Powertrain Control Module: Service and Repair
Powertrain Control Module (PCM) Replacement
Service of the powertrain control module (PCM) should normally consist of either replacement of the PCM or electrically erasable programmable read
only memory (EEPROM) programming. If the diagnostic procedures call for the PCM to be replaced, the PCM should be inspected first to see if the
correct part is being used.
IMPORTANT:
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To prevent internal PCM damage, the ignition must be OFF when disconnecting or reconnecting power to the PCM. For example, the battery
cable, PCM pigtail, PCM fuse, jumper cables, etc.
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Remove any debris from the PCM connector surfaces before servicing the PCM. Inspect the PCM module connector gaskets when
diagnosing/replacing the PCM. Ensure that the gaskets are installed correctly. The gaskets prevent contaminant intrusion into the PCM.
Removal Procedure
CAUTION: Refer to Battery Disconnect Caution in Service Precautions.
NOTE: Refer to PCM Disconnect Notice in Service Precautions.
1. Disconnect the negative battery cable.
2. Move the PCM retention bar and retainer away from the PCM.
3. Remove the PCM from the PCM mounting bracket.
