MAF check engine light and transmission help - Page 2 - Toyota Yaris Forums

CTScott · 04-01-2012, 08:16 PM

Quote:

Originally Posted by heeroyuy01195

Thanks Scott, but shouldn't I still be getting a resistance reading when testing between the ECM to ground and the MAF to ground? I just want to be sure before I get a new MAF sensor. Thanks for all of the help Scott, much appreciated!

No. Those two signal wires should not show continuity to ground, otherwise they would be shorted.

heeroyuy01195 · 04-01-2012, 08:21 PM

Okay thanks Scott, just wanted to double check. I saw in the manual on pg 91 that I was supposed to be reading 10k ohms or more between CT26-3 and ground or C20-118 and ground for the "check for short" so I thought there was supposed to be a connection there. Thanks for all the help!

CTScott · 04-01-2012, 08:32 PM

Quote:

Originally Posted by heeroyuy01195

Okay thanks Scott, just wanted to double check. I saw in the manual on pg 91 that I was supposed to be reading 10k ohms or more between CT26-3 and ground or C20-118 and ground for the "check for short" so I thought there was supposed to be a connection there. Thanks for all the help!

By 10K or more, they are saying that there should not be a low resistance connection to ground, which would be a short.

heeroyuy01195 · 04-01-2012, 08:36 PM

Yeah it just clicked in my head a little while ago what they were getting at lol. I'm not sure what I was thinking earlier; stupid me moment I guess.

heeroyuy01195 · 04-03-2012, 02:16 PM

Swapped the MAF out yesterday morning, car runs like a champ again. Thanks so much for the help Scott!

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04-01-2012, 08:21 PM	#20
heeroyuy01195 Post count means nothing. View User's Garage Drives: AW11, NCP91, Old Motorcycles Join Date: Jul 2006 Location: Florida Posts: 375	Okay thanks Scott, just wanted to double check. I saw in the manual on pg 91 that I was supposed to be reading 10k ohms or more between CT26-3 and ground or C20-118 and ground for the "check for short" so I thought there was supposed to be a connection there. Thanks for all the help!

04-01-2012, 08:36 PM	#22
heeroyuy01195 Post count means nothing. View User's Garage Drives: AW11, NCP91, Old Motorcycles Join Date: Jul 2006 Location: Florida Posts: 375	Yeah it just clicked in my head a little while ago what they were getting at lol. I'm not sure what I was thinking earlier; stupid me moment I guess.

04-03-2012, 02:16 PM	#23
heeroyuy01195 Post count means nothing. View User's Garage Drives: AW11, NCP91, Old Motorcycles Join Date: Jul 2006 Location: Florida Posts: 375	Swapped the MAF out yesterday morning, car runs like a champ again. Thanks so much for the help Scott!