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Thread: Reading DTCs?

  1. #1

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    Reading DTCs?

    So I decided I'd get around to checking my annoying CEL to see exactly what it is. I know I've got a cracked exh manifold but I'd like to know what the code is. The book is confusing saying to use a analog volt meter on the DLC by the fuse box and read it kinda like the older cars where you ground 2 pins and it flashes codes with the light. Can it do that? Or do you need to use the DLC? Would a test light do the same thing since I cant remember the last time I used an analog volt meter and my digital one isn't going to pick up swings in voltage like that even tho it's a step under a fluke meter.

  2. #2



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    Yea it works light that and a test light or cheap electric buzzer will work
    Josh
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  3. #3

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    Gona have to get my light to come back on. I had to unhook the battery from the block to put the a/c bracket in and the light is out now. I found out the MUT-III can't communicate with these trucks unless they have an OBDII port to power up the VCI so back to the test light.

    I have a cracked exh. manifold so Im pretty sure I know what the problem is but I'd like to see the codes.

  4. #4

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    Test light no good. My mpg is getting worse and I'm smelling gas so I know I'm running rich. I need to get this thing working. I'm wondering if it's an actual problem out of the ECM. I even tried the signal wire at a different ground and still no good.

  5. #5



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    Somewhere on the site was a diagram of how to hook up the light to pull codes. I don't remember where it was . If you find it let me know and I'll stick it.

    You must use a volt meter with a needle.
    Look in the Manual Section> over 216 manuals> find: the montero and MM truck. It has a way to get the code information out of there with pictures and everything.
    Last edited by camoit; 05-28-2013 at 08:28 PM.
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  6. #6



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    Section 6-26 in the manual.
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  7. #7

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    I found this in the wiki section

    http://www.mightyram50.net/vbulletin...ght=test+light

    I think i'll go by radio shack sometime and buy a cheapy buzzer

  8. #8



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    I've. Told people about that method(I put it in the wiki) tons of times, and its easy, and no one ever uses it.
    Josh
    09 BMW 335i E92 Twin turbo
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