QuestionOKAY..I know i hooked up my probes okay..one pin is on the far upper right, the ground on the far lower, left..what I think is that I am reading 2 series of CODES, not one, so maybe its a 21 and a 15..who knows..anyway, what is a digital meter? Would that work better?
thanks, again!
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HI I have a 1992 excel, 1.5 liter, F.I. My check engine lite has been on for yrs, but the car ran fine..Recently when i shut the car off and go to RESTRART when WARM, the engine idles really high..only upon a warm start..it races like crazy w/o my foot on the accelerator..a month later, it recently started stalling. It will start, but die out at idle or driving..sometimes it runs ok..intermittent stalling. I put on a new cap, rotor, plugs..and coil..still same problem..HOW do I read the codes..i know where to connect, but get 4 long sweeps with a dig meter and 5 short..there is no such code which =45..PLEASE HELP. also, forward this to ROBERT on here..I cannot do so..many thank. Please email asap..
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You've either read the code improperly or you've read the automatic transmission code. 45 is a code for an open or shorted circuit for the pressure control solenoid valve. If you think it's possible you may have attached the voltmeter to the wrong pins for ECM output, check the diagram in the shop manual at www.hmaservice.com.
I've also *never* had success reading these codes with a digital meter. I've only been able to do it with an analog meter or a light emitting diode. I've also never run across a test light that would read the codes.
I'd forward this to Robert if I could, but I don't know how to contact him other than through the "ask a question" page you would see. He's been gone long enough that I suspect he may be on an extended vacation. The site still lists him in the reports section, so I suppose he hasn't requested to be removed.
AnswerA digital meter is one with a digital readout. Since you referred to it as a dig meter, I thought that's what you meant. But since you have an analog meter (with a needle), you should be good.
If you've got a 21 and a 15, then you definitely want to check out the ground splice in the engine harness. As I recall, teh splice is about one to two feet away from the ECM connectors in the control harness. You should see technical service bulletin 93-36-007. You can access it at www.hmaservice.com. You'll need to register for a free account, and the site requires internet explorer.
