Easy Diagnostic Mode, THROW AWAY YOUR PAPER CLIP! Options

[lagos]

i got sick of dealing with paper clips or little pieces of wire that would never stay in right, whenever i wanted to put the car into diagnostic mode. so with a little research into the wiring diagrams, i made a handy diagnostic switch ! now if you want to check your CEL codes, or put the car into diagnostic mode to check the timing, just flip the switch !

to make your own, all you need is some type of switch from a car parts store. make sure the switch is sealed, meaning that none of the terminals stick out of the back of it. next unwrap the tape from the harness that goes to the diagnstic box and find the ORANGE wire. slipce into it, but dont cut into it, so that anytime somone works on your car (toyota maybe) and wants to put the car into diag mode, it will still work. connect one wire from the switch to the orange wire you just exposed. then connect the other wire from the switch to any ground point on the car. tape everything back up and you are now ready to use your switch !

this will work on any OBD1 3sgte. it should also work on an OBD1 5sfe, but doubble check a wiring diagram to make sure they didnt change the color of the wire that needs to be spliced into.




This post has been edited by lagos: May 21, 2006 - 8:40 PM

[Bigmeanbulldog55]

I put it right next to the diagnostic port. Only needed about 10inches of wire, if that. It's not like I need to flip the switch on the fly. And I do conferm, the yellow wire. Man, this is such an easy thing to do and so helpful. The reason I needed to check it turned out to be throttle body positioning sensor. There are 3 plugs on a 5sfe, and I unplugged every one of them working on it the other day and forgot to plug them in again. I can't believe it ran. That just proves what you can take off.