OEM Cadillac XLR Engine Control Module

Cadillac XLR Engine Control Module Parts and Q&A

• PCM
  12678511
  Q: How to replace the Engine Control Module (ECM) on Cadillac XLR?

  A:

  The first step to replace the Engine Control Module (ECM) involves switching off ignition power because it protects the internal components of both the power connections and control module connectors. It is essential to avoid placing battery voltage on the control module's metal case since this could cause damage along with refraining from touching pins or soldered components to protect from electrostatic discharge. A correct inspection of gaskets and an effective connector surface cleaning must be completed before service to block contaminant access. Note down current engine oil and automatic transmission fluid lifespans because the replacement module needs this information to function otherwise the engine will need immediate oil change at 5000 km (3,000 mi) based on 100% default life and transmission requires fluid change at 83000 km (50,000 mi again based on the same default percentage). Begin the project through a scan tool to retrieve the current engine oil life percentage as well as automatic transmission fluid life percentage for permanent documentation. To proceed with the replacement of the Engine Control Module (ECM) installation begin by taking off the right front wheelhouse filler panel after disconnecting the ecm electrical connectors then remove the fasteners securing the ecm position. To install the ecm position it on the ecm bracket before using retaining fasteners which must reach 3nm (27 lb in) torque value before reconnecting electrical connectors to the ecm then reinstall right front wheelhouse filler panel. Programming the new ecm remains mandatory whenever such a system component gets installed.
• PCM
  12576523
  Q: What precautions should be taken during Engine Control Module service and what does it typically involve on Cadillac XLR?

  A:

  The service of Engine Control Module (ECM) requires either new ecm components or eeprom programming sessions yet requires confirmation of part correctness before starting either procedure. Internal ecm damage can be avoided by keeping the ignition off during every power transition during the component replacement process that involves disconnecting or reconnecting the Battery Cable and ecm pigtail and ecm Fuse and jumper cables. The gasket service of ecm module connector requires debris removal from ecm connector surfaces and proper gasket installation to stop any intrusion. The service programming system (SPS) should be used to program the new ecm. You must start the removal process by obtaining the engine oil and automatic transmission fluid life percentages using a scan tool since omitting this step will default to 100% that triggers immediate engine oil change after 5000 km (3,000 mi) and automatic transmission fluid change at 83000 km (50,000 mi) from the last maintenance. Start by taking out the right front wheelhouse filler panel then detach the ecm electrical connectors before uninstalling the fasteners which secure the ecm. Secure the ecm to its ecm bracket through retaining fasteners that should be tightened to 3.0 n.m (27 lb in). Install the electrical connectors into the ecm before putting back the right front wheelhouse filler panel while ecm programming requires new ecm installation.