OEM 2007 Cadillac DTS Engine Control Module

2007 Cadillac DTS Parts Questions & Experts Answers

• Q: How to replace the Engine Control Module (ECM) on 2007 Cadillac DTS?

  A: Starting the Engine Control Module replacement process requires ignition switch deactivation because it protects connectors and power connections from harm. Service personnel should keep the metal case free from battery voltage and should avoid touching pins on connectors or circuit board hardware because electrostatic discharge can harm the components. Check the control module connector surfaces for debris while inspecting the gaskets to verify correct assembly that blocks contaminants. Scan tools will provide the remaining percentages of engine oil life and automatic transaxle fluid life which must be recorded because replacement ecms without this programming will default settings to full usage resulting in required changes at 5,000 kilometres and 83,000 kilometres respectively. Start the removal procedure by disconnecting the negative Battery Cable before removing the engine harness electrical connector from the mass air flow/intake air temperature (MAF/IAT) sensor and the positive crankcase ventilation (PCV) fresh air tube from the air duct and the secondary air injection (AIR) pump inlet tube from the air cleaner upper housing. Start the replacement by removing the air cleaner outlet duct from the Throttle Body then breaking the lower housing clips before taking out the air cleaner upper housing. First disconnect the lock mechanism on the engine harness harness electrical connector and remove the connectors from the ecm before extracting the ecm from the air cleaner lower housing. It is necessary to check the air filter/ecm housing assembly and maf/iat sensor inlet screen for debris and damage before installing the new ecm unit. Install the ecm in the lower air cleaner housing after you reconnect all engine harness electrical connectors and activate the lever locks. Fasten the air cleaner upper housing while checking that each upper housing tab connects with its lower housing clip. The air cleaner outlet duct must be installed to the Throttle Body while tightening the clamp to 3 n.m (27 lb in). Complete the task by reconnecting the air pump inlet tube with the pcv fresh air tube while you also connect the engine harness electrical connector to the maf/iat sensor and negative Battery Cable. The ecm needs programming to finalize the installation.