![]() ![]() Go ahead, try disconnecting that ecm connector and check pin 3 of the MAF sensor connector to ground. ![]() That may be why you got those unusual readings for the other pins. The other pins readings are off, they should be infinity (no reading or OL, or however your meter signifies an open circuit, but I believe they want you to check it with the ecm still disconnected. If that center pin is measuring close to zero ohms, the ground is good. If so, then it is obviously the center pin no matter which way you look at it. Is it a five-pin plug in a straight line like this: Basically, they want you to see if there is a good ground on pin 3 of the connector. The first two steps tested normally, it is the 3rd one I wonder about. It is still VERY warm & humid here, and i know that those two things will affect readings, so. ** please note - even tho the FSM does not specify to plug the ECU back in for this test sequence, that is the ONLY way we could get a reading - otherwise the previous readings stand. Resistance between air flow sensor connector and body ** Harness check between ECU & air flow sensor connectors Well, went back out and took another look at this - and apparently I was looking at the connector backwards.so new readings. The other half (who is the owner of the meter) was helping. Yes, i had help taking the measurements - would be almost impossible for one person to do it alone. If i am reading all of this correctly, i need to repair/replace my wiring harness? or will changeing the MAF take care of the problem?ĭo you have someone helping you with the connections? On the ohm readings - there was absolutely no change of the meter in any way shape or form - and we do know the meter works, tested an injector and it read fine. Ok, so following the FSM directions we tested all specified connections - the results are noted on a copy of the page below. Check harness connectors between ECU ~~~ - Not Ok - ~~~ Repair Harness/connector Check voltage between ECU & body ~~~ - ok - ~~~ Repair ECU terminal poor contactĢ. Ok, starting over here - turns out the intermittent running problem was not the fuel pump - car FINALLY threw a CEL.Ĭode 23 - Air Flow Sensor - Abnormal voltage input entered from air flow sensor.ġ. 1990 Legacy LS wagon - EJ22, 4eat, AWD - 216k + ![]()
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