TECH: resetting the ecu
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TECH: resetting the ecu
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Resetting the ECU is required under many circumstances. If you've bolted on some power adder's then it is recommended that you reset the ECU so that it can relearn and adjust for the added components. Other times, you may need to reset the CEL after it has tripped.
Resetting the ECU is extremely easy, there are two methods you can use. The Honda manual and Helms manual follow the principle of removing the ECU fuse found under the hood.
On most B-series engine bays, the black fuse box is located next to the battery. Pop off the lid and using a fuse tool or a pair of pliers, remove the fuse labeled FI E/M (ECM) FUSE.
You must wait approximately 3-5 minutes before re-inserting the fuse back into the fuse box. Once replaced, your ECU will be reset.
Another method of resetting the ECU, which I feel is quicker and easier, is to just pull off the negative terminal on your battery. All that is required is a 10mm box wrench or socket and remove the NEGATIVE terminal post on the battery. There's no waiting time involved, just remove for 1 second and then replace it. Make sure you tighten the terminal down firmly but not too tight. This is my preferred method of resetting the ECU. Both methods will work.
That should clear any CEL or for whatever reason it may be that you needed to reset the ECU. Enjoy!
www.c-speedracing.com
Resetting the ECU is required under many circumstances. If you've bolted on some power adder's then it is recommended that you reset the ECU so that it can relearn and adjust for the added components. Other times, you may need to reset the CEL after it has tripped.
Resetting the ECU is extremely easy, there are two methods you can use. The Honda manual and Helms manual follow the principle of removing the ECU fuse found under the hood.
On most B-series engine bays, the black fuse box is located next to the battery. Pop off the lid and using a fuse tool or a pair of pliers, remove the fuse labeled FI E/M (ECM) FUSE.
You must wait approximately 3-5 minutes before re-inserting the fuse back into the fuse box. Once replaced, your ECU will be reset.
Another method of resetting the ECU, which I feel is quicker and easier, is to just pull off the negative terminal on your battery. All that is required is a 10mm box wrench or socket and remove the NEGATIVE terminal post on the battery. There's no waiting time involved, just remove for 1 second and then replace it. Make sure you tighten the terminal down firmly but not too tight. This is my preferred method of resetting the ECU. Both methods will work.
That should clear any CEL or for whatever reason it may be that you needed to reset the ECU. Enjoy!
boostmonkey
Join Date: Jun 2000
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The method Taylor of Secret Services taught me was to undo the battery terminal, then get in the car and turn the key to the start posision and hold it for 10-20 seconds. He mentioned some sort of technical mumbo jumbo, but I am too tired to try to remember what exactly he said. Cleared my codes no problem.
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Just to bring to light, our ECU's are real time updating and can correct themselves with changes in the system on the fly with out a reset. (obd2).
Also removing the ECU's fuse is the same thing as pulling the batery. Why would you have to wait 3 mins for one, and not the other?
Also removing the ECU's fuse is the same thing as pulling the batery. Why would you have to wait 3 mins for one, and not the other?
Import Tuner
Join Date: May 2002
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cronic is right, our ecus (well at least obd2 from what ive learned) are realtime so they will readjust everytime you start the car. O and you only have to wait at least 10 seconds when you disconnect the NEGATIVE terminal on the battery and your codes will be cleared.
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03' BMW 330XI
03' BMW 330XI
