High idle after replacing IAC, will not reset

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#11

03-12-2022 | 05:44 PM

tobnpr

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Quote:

Originally Posted by HeyYou

Is that a P0505 code??

Unplug the IAC, turn the ignition to run. Don't need to start the motor. Use your volt meter, or even a test light, and check all four pins for voltage. Should see 12 volts on two of the pins. Do you?

Just got back to trying to figger this out.
Had lent my OBD scanner to my son, can't seem to get it back

so I ordered another.
It is P0505. Getting voltage on all 4 pins- with the "snap" part of the connector up, from left to right- 5.6, 5.6, .58, .58
Is there voltage bleeding over that shouldn't be there? Replaced the computer recently...

IAT was reading 147 degrees after a couple of minutes running, does seem high with a couple minutes running, outside temp was low 60's.
MAP shows 12.1 in/hg idling at 1536, no clue if that's in spec?

Any ideas?

Last edited by tobnpr; 03-12-2022 at 05:47 PM.

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#12

03-12-2022 | 09:58 PM

HeyYou

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From: Clayton MI

IAT is wrong. Need to figger that one out.

IAC connector is likely good..... not sure about the voltage bleedover though.... that doesn't seem quite right, but, I don't know for sure..... Test resistance to ground under the same conditions...... see what it says.

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