MAF Voltage

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Nov 16, 2009 | 08:08 PM

gawath

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MAF Voltage

I am having a smoking problem at startup and when the vehicle is warmed up. I suspect that it may be due to bad MAF wiring. I've already swapped the MAF over to a known good one and it's doing the same thing. I measured the voltage at the MAF pigtails with the ignition in the ON position (engine not on). My readings are below. Can any members confirm with what I got?

I believe the red wire should read 12v. It looks low to me. Is the 11.12v adequate?

Is the .241v for the yellow wire correct for being at "ignition start". I believe it should be 5v, but is the 5v reading when the engine is turned on?

Checked the 20A Engine Sensor fuse and it looks fine.

I also noticed on my cluster that the voltage is reading low. This may be a grounding issue.

Last edited by gawath; Nov 16, 2009 at 08:20 PM.

Nov 17, 2009 | 04:28 AM

khaotic

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From: Warrenton, VA.

maf

Hope this helps pink is 12v yellow is 5v

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Nov 17, 2009 | 07:12 AM

edcmat-l1

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From: Va Beach

Check it with your ground probe on the battery negative. If it's got a bad ground, your voltage on both wires will be good with the negative probe on the battery neg.