That being said, the ECU or Electronic Control Unit of cars is pre-set to suit the requirements of all, and it can be adapted to the individual driving style of its owners. To reset the ECU just disconnect the negative terminal of the battery for 30mins.Then connect and idle for few minutes and then go for a long spin as if you've stolen the car!! Discussion Starter • #1 • Feb 28, 2002. thanks -Young 2001 540ia Orient blue / Grey interior-AC Schnitzer-poster boy Previous Cars : why bother? Turn the ignition switch to the “off” position and wait 10 seconds. What happens if you disconnect the positive terminal first? Does jumping a battery hurt your battery? Turn the ignition switch to the “off” position and wait 10 seconds. Member Registered: 30th Mar 10 Location: Nottingham User status: Offline. Usually, this is the same fuse and line that powers up your radio. Post Reply. Remove the positive terminal cable from the battery using your pliers or wrench. To "reset" the ECU, all you have to do is remove the source of backup power. Always reconnect the battery positive lead first and the negative last, ensuring that there is a good electrical contact and the battery terminals are secure. Follow these step by step instructions for this method: This is an easier way of removing any long term memory saved in your car’s ECU system. My car has 48000 miles. What cars have the most expensive catalytic converters? Answer Upvote. Cheers,Scott. Maybe the DIC and Nav unit respond differently than the ECU to battery disconnect. Something like turn the key on but not start, press the gas peddle for 5 seconds, turn key off, remove foot from peddle. The vehicle's ECU will now be reset. is there a quick connect anywhere over than on the battery terminals to safely depower the ECU for a few minutes? Timing is extremely critical. Also Know, do I disconnect the positive or negative to reset ECU? Print view; 23 posts • Page 1 of 1. When I leave it overnight, it seems to delete the memory just fine. Disconnecting the battery will soft reset the ECU (eg clears certain emissions and other warning lights etc) Usually only requires 30 seconds of disconnection. The car ECU maps aren't held in volatile memory, so will not be affected by removing the battery. How long should battery be disconnected to reset ECU? Would 10 minutes be sufficient? I think it's either 10 mm or 12 mm. If the "Service Vehicle" light is off, the transmission has been reset. Thanks. Acces PDF Reset Ecu Vw Jetta Vehicle" light is not on. The ECU stores these "learned" values in battery backed-up RAM so that it doesn't have to start from scratch the next time you turn your engine over. Resetting it clears all the saved data. This video shows resetting the ECU on my 2006 Eclipse. Now that you have made up your mind to reset your ECU system, just follow these instructions and be safe: The basic step towards resetting the ECU system is to remove the backup power source altogether. How many calories are in 5 oz of baked chicken? (This is the case for the Mk1 and Mk2 Zetec engines. When I hooked it back up my trip meter, timer and other resettables were all zeroed out and I got a Nav boot up screen that I'm not used to. Save Share. Gooday all, whilst researching the forum trying to sort out my limp mode/ASC/ auto trans issue, see my other thread, I see a lot of references to "resetting ECU" is this just a quick disconnect of the battery and then reconnect? The easiest way to reset the ECU is to remove fuses 4 and 11 from the fusebox next to the battery in the engine bay and leave the car for about 15 minutes. If it is NOT DONE within the specify time, the ECU will not reset and the Check Engine Light (CEL) will continue to remain ON. - All Possible Reasons, Find Owner of Vehicle by License Plate Number, When Should I Change the Clutch of My Car. This RAM is backed-up by a battery, so that it remains saved even when the engine is off. There is no back-up battery to hold the memory in the ECU (since the programming is the same kind of firmware as any computer BIOS). if the light stays off then it,s set. I was talking with a friend who resetted the ecu of his honda civic by removing the positive and negative terminals from the battery.

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