Bad ECM?
in [Toyota Trucks]
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From: wenmang@yahoo.com on 11 Sep 2006 15:32 Dante wrote: > So I finally got it to recognize a drive cycle.... (Thanks Ray for the > suggestion of downloading the drive cycle from Techinfo.toyota.com) The > check engine light came on. The code is P0130. Malfunction with heated > o2 circuit bank 1 sensor 1. > > I ran a couple of tests on both o2 sensors and both of the heater > elements measure about 12 - 16 ohms. The Hayes manual says that they > should only be about 5-8 ohms or so. > > My question is what should I do from this point? Should I just replace > both sensors? Could it be something other than the sensors? > > By the way... the previous owner must have bottomed out while going > offroad or something because the downstream sensor is slightly bent and > a little of the wire is showing through the insulation. > > Thanks in advance, > Dante > > > Q wrote: > > Ray, > > > > Yes, this one was truly bad. When they plugged my ECM into the other > > truck, the other truck ran just like mine did. Also I had the ECM out > > several times to check the connectors, wiring, and internal soldered > > connections. I suspect a bad power transistor that drives the ignition > > coil/ignitor. > > > > Q > > > >> > >> I've run across that scenario a few times, where someone tries > >> everything except the ECM, and when they finally swap the ECM, the > >> problem is solved. When the ECM is sent to the lab for testing and > >> repair, they do not find anything wrong and when it is re-used, the > >> problem never appears. According to the head guy at the lab, the > >> process of unplugging and re-plugging the ECM seems to cure the > >> problem. Like I said, they do run across one or two that test bad > >> every year or two, it sounds like yours was one of the rare failures. > >> Have you played the state lottery lately? ;-) Could you care to share some info with us? My 2001 Corolla currently stucks with CAT monitoring cycle and 1 month passed and the drive cycle is still not complete. What kind of info(or trick, not specific info) given by Techinfo.toyota.com which can allow ECM recognize the CAT drive cycle? I am only interested in how to make CAT drive cycle complete. Can the viewed material be printed on printer and what kind of key words that you use for searching? Thx.
From: Dante on 11 Sep 2006 16:04 I had to subscribe to a one day memebership to techinfo.toyota.com. There you can find any information you want about your specific vehicle. I would advise doing just that. You can download the documents that you find and save them so you can print them for future use... It's well worth the $10 bucks. I would love to help you but the drive cycle for a 1996 Toyota truck is most likely different from that of a 2001 Corolla. Basically the drive cycle that I did consisted of a) driving at a steady speed then b)stopping and idling for a few minutes, then repeating a and b again. I did have to do the cycle two full times with an engine shutoff in the middle. Hope this helps. Dante wenmang(a)yahoo.com wrote: > Dante wrote: >> So I finally got it to recognize a drive cycle.... (Thanks Ray for the >> suggestion of downloading the drive cycle from Techinfo.toyota.com) The >> check engine light came on. The code is P0130. Malfunction with heated >> o2 circuit bank 1 sensor 1. >> >> I ran a couple of tests on both o2 sensors and both of the heater >> elements measure about 12 - 16 ohms. The Hayes manual says that they >> should only be about 5-8 ohms or so. >> >> My question is what should I do from this point? Should I just replace >> both sensors? Could it be something other than the sensors? >> >> By the way... the previous owner must have bottomed out while going >> offroad or something because the downstream sensor is slightly bent and >> a little of the wire is showing through the insulation. >> >> Thanks in advance, >> Dante >> >> >> Q wrote: >>> Ray, >>> >>> Yes, this one was truly bad. When they plugged my ECM into the other >>> truck, the other truck ran just like mine did. Also I had the ECM out >>> several times to check the connectors, wiring, and internal soldered >>> connections. I suspect a bad power transistor that drives the ignition >>> coil/ignitor. >>> >>> Q >>> >>>> I've run across that scenario a few times, where someone tries >>>> everything except the ECM, and when they finally swap the ECM, the >>>> problem is solved. When the ECM is sent to the lab for testing and >>>> repair, they do not find anything wrong and when it is re-used, the >>>> problem never appears. According to the head guy at the lab, the >>>> process of unplugging and re-plugging the ECM seems to cure the >>>> problem. Like I said, they do run across one or two that test bad >>>> every year or two, it sounds like yours was one of the rare failures. >>>> Have you played the state lottery lately? ;-) > > Could you care to share some info with us? My 2001 Corolla currently > stucks with CAT monitoring cycle and 1 month passed and the drive cycle > is still not complete. What kind of info(or trick, not specific info) > given by Techinfo.toyota.com which can allow ECM recognize the CAT > drive cycle? I am only interested in how to make CAT drive cycle > complete. Can the viewed material be printed on printer and what kind > of key words that you use for searching? Thx. >
From: wenmang@yahoo.com on 11 Sep 2006 16:47 Thanks. I will do the same(1 day subscription). Are you searching "drive cycle" on techinfo.toyota.com, right? I just like to quickly locate the info I need. Thx.
From: wenmang@yahoo.com on 11 Sep 2006 16:47 Thanks. I will do the same(1 day subscription). Are you searching "drive cycle" on techinfo.toyota.com, right? I just like to quickly locate the info I need. Thx.
From: Dante on 11 Sep 2006 17:19
On the left side of the page (after you have logged in) there is a place to select the types of docs you want. I believe that it was a technical bulletin. I checked that and then ran the search with an empty field to get all of the bulletins for my vehicle. That's it. Good luck! Dante wenmang(a)yahoo.com wrote: > Thanks. I will do the same(1 day subscription). Are you searching > "drive cycle" on techinfo.toyota.com, right? I just like to quickly > locate the info I need. Thx. > |