OEM 2003 Cadillac DeVille Engine Control Module

2003 Cadillac DeVille Parts Questions & Experts Answers

• Q: How to service the Engine Control Module on 2003 Cadillac DeVille?

  A: Before performing maintenance on the Engine Control Module users must turn off ignition because it ensures safety during pcm connector and power cable handling. Record the transaxle fluid and engine oil life indexes as the first step before disconnecting the battery negative cable along with the mass air flow/intake air temperature (MAF/IAT) sensor electrical connector. You should disconnect the intake air duct clamp at the Throttle Body and unfasten the air filter element/powertrain control module (PCM) housing cover screws before extracting the air filter element/pcm housing cover, maf/iat sensor, and intake air duct. There are three steps to disconnect both pcm connectors before removing the pcm. Check the air filter element/pcm housing assembly and maf/iat sensor inlet screen for debris and inspect all components and the intake air duct for damage because any flawed parts need replacement before installing the new pcm. The off-board method should be completed for pcm programming before performing additional steps. Connect the new pcm through its connectors by tightening screws to 8 n.m (71 lb in). Perform a correct assembly of the Throttle Body parts including intake air duct alongside maf/iat sensor as well as air filter element/pcm housing cover by ensuring correct positioning to prevent dtc activation. The installation requires tightening both air element/pcm housing cover screws to 4 n.m (35 lb in) and the intake air duct clamp at the Throttle Body to 3 n.m (27 lb in). The pcm programming requires appropriate service programming system (SPS) procedures after reconnecting the maf/iat sensor connector and battery negative cable.