Temporary failure of the electronics

Sorry my bad English. I'll try to explain a bug. I have a Grand Voyager 2006 3.3 limited (European). When the engine is idle sometimes a part of electronic stops working suddenly. Instrument panel (odometer is still on!), fog lights, electric slide doors and tailgate, Central lock and something else (can't remember) but the same ones and all together. By the way the remote control of the "non-native" alarm continues to turn the central lock on and off! When the bug occurs I may start start the engine and the car goes without any other problems. This problem will not occur if I start the engine before. But if this happens I need to remove the terminal from the battery or pull out the fuse "IDO" for a few seconds or just close all doors manually (if open) and wait typically until the odometer is lit off and then everything restores itself. Problem occurs in any weather and its occurrence is unpredictable. Replacement of the BCM and FCM did not help. I need Your help! Thank you very much!

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Remove the ecm connected to the side of the fuse panel in the engine compartment . Check for corossion on the pins use a spray electrical cleaner to clean the socket and the pins then before reassembling put dielectric gel on the contacts and pins to keep the corrosion from returning. Hope this helps

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Thank you but what`s the Engine Control Module (ECM) got to do with this problem? The bug has no affect on the engine work. Maybe you ment an FCM which is situated right on the front of the fuse block? If yes I`ve already replaced it by the newer one. Didn`t help...


@rosarioagro please excuse the confusion i refer to all three as ECMs (electronic control modules) and then state there locations . I guess it just depends were your from as to what you refer to it as . but the point I was trying to make was that the connector could be full of corrosion even if you replaced the module the connection can still be bad because of corrosion in the receiving end of the connector . clean the connector with a spray electrical cleaner and replace with the dielectric gel


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