OEM Chevrolet Uplander Engine Control Module

Chevrolet Uplander Engine Control Module Parts Questions & Experts Answers

• PCM
  12678511
  Q: How to service the Engine Control Module (ECM) on Chevrolet Uplander?

  A: Service of Engine Control Module (ECM) requires an assessment to determine whether you need to replace it or reprogram its eeprom. Validate that the inspected ecm is the appropriate replacement part; replace the ecm if it proves faulty by installing the new service part. The prevention of damage requires users to turn off the ignition during all operations involving control module connectors and power connections. The metal case of the control module should avoid touching battery voltage and handling both connector pins and soldered components to protect from electrostatic discharge damage. You should remove debris from the control module connector surfaces followed by an examination of gaskets to ensure contaminants cannot invade the system. The replacement ecm requires programming followed by a crucial task where service ecm labels need identification with both broadcast code and production ecm number. Step one is to record how much engine oil life remains before taking apart the negative Battery Cable. The installation process starts with detaching the left sheet metal diagonal brace followed by air cleaner cover loosening and removal. Next, disconnect the engine harness electrical connectors from the ecm before lifting off the ecm from the air cleaner cover. The installation process requires users to install the ecm onto the air cleaner cover after connecting the engine harness electrical connectors to the ecm as well as tightening the air cleaner assembly cover screws to 4 n.m (35 lb in). After reinstalling the left sheet metal diagonal brace the technician must reconnect the negative Battery Cable. Programming of the eeprom should happen when new ecms are deployed.