i appreciate you linking this thread to my egr thread, im trying to figure out the EDS test now, thats the next thing i want to do. a few questions though.
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I used an analog meter. X11 cover removed. Negative meter to ground, positive meter to pin X11/4, a jumper wire from X11/4 to ground. Followed instructions for 602.962 engine from 124 CD manual and also pulse list.
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ive got the service manual and i printed out the part for the 602.962. but in the service manual, they use a pulse counter, which has 3 wires (+ gnd -), but a meter only has 2. im guessing thats why you used a jumper from X11/4 to gnd. but was this jumper something you made? and by ground, do you mean the battery or X11/1?
also, which test did you follow? the "a) short-test" or the "b) testing with pulse counter" both seem to check the same codes and use the same tools in the service manual, but "b" seems to have much more complicated steps. whats the difference?
and what kind of meter did you use? multimeter, voltmeter or ammeter?
since none of these count the pulses, im guessing you have to count the number of times the volts spike. is this right?
i also havent bought a meter yet, so what kind is best?
thanks alot tony. before i read this thread, i thought checking the computer required special tools, but apparently not.