OEM Buick Rendezvous Engine Control Module

Buick Rendezvous Engine Control Module Parts and Q&A

• PCM
  19210070
  Q: What does the service of the engine control module (ECM) typically involve on Buick Rendezvous?

  A:

  The service of powertrain control modules (PCM) requires two main approaches that include either pcm product replacement or eeprom electrically erasable programmable read-only memory programming. A thorough inspection must be done on the pcm to verify it is the needed part before a replacement occurs. Use new components to set the code of the pcm before installing the replacement service pcm when execution faults occur. You must switch off the engine when working with control module connectors and disconnecting or reconnecting power to protect the control module components from damage. The metal case of the control module should not touch battery voltage because it leads to damage. Servicing requires both a prohibition to touch connector pins and soldered components on the circuit board while performing checks for debris that might affect connector surfaces. The control module connector gaskets require inspection for correct installation details to stop harmful substances from entering the system. A programmed new control module needs installation while tracking remaining oil life is vital because neglecting this step will reset the percentage and force an oil change at 5000 kilometers (3000 miles) from the last procedure. The procedure for pcm removal includes applying a scan tool to get the engine oil life percentage and then disconnecting the negative Battery Cable before eliminating the left diagonal brace and air cleaner assembly cover to pull the pcm out from its mounting position. You should disconnect pcm engine harness electrical connectors then extract the pcm from its location. The installation includes plugging in engine harness electrical connectors to the pcm while placing the pcm back into the air cleaner assembly before reinstalling the air cleaner assembly cover and torquing screws to 4 n.m (35 lb in). Complete pcm programming only after installing a new pcm. Install the left diagonal brace then restore the negative battery connection.
• ECM
  19260507
  Q: How to replace the Engine Control Module (ECM) on Buick Rendezvous?

  A:

  The first step to replace a powertrain control module (PCM) requires verifying that the pcm you received is the correct one through inspection. The existing pcm must be replaced with the new service pcm though programming is mandatory since the replacement will not carry pre-written software. The dtc p0602 issue occurs when eeprom is unprogrammed or showing malfunction symptoms. The service pcm must receive its broadcast code and production pcm number during identification procedures until the end of its service life so one should skip covering these values on the pcm face. Begin by scanning for current engine oil life data using an official tool which should be recorded before replacement when replacement programming is omitted because the default engine oil life will set to 100% leading to an early oil-change requirement at 5000 km (3,000 mi). To extract the pcm from its assembly the technician must first disconnect the negative Battery Cable before removing the left sheet metal diagonal brace with air cleaner assembly cover followed by lifting the pcm. Connectors should be unmated from the pcm before taking it outside of the engine compartment. Begin by attaching the pcm electrical connectors while tightening their screws to 8 n.m (71 lb in) before placing the pcm inside the air cleaner assembly and covering it with retainers. Reinstall the left sheet metal diagonal brace next to the installation of the negative Battery Cable connection. The eeprom programming needs to be completed by any new pcm installation.