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Discussion Starter · #1 ·
Changed intake temp sensor and same code remains. Comes back on just as soon as its cleared.

Checked and getting 2 volts at end of connector while engine is running.
Anyone know what it should normally be 5 volts maybe?

What next could computer be malfunctioning?
 

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Changed intake temp sensor and same code remains. Comes back on just as soon as its cleared.

Checked and getting 2 volts at end of connector while engine is running.
Anyone know what it should normally be 5 volts maybe?

What next could computer be malfunctioning?
You either have a short or break in the wire, or a bad ECU. Have you checked both wires for continuity at the connector back to the connector on the ECU?
 

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Discussion Starter · #3 ·
I ran wires directly from IAT sensor to the corresponding red /yellow and grren/blue wires in the D block connector. Now Im getting 5v at the connector but after starting the car now getting ECT code high input P0118, P0123 throttle position, and the originally had to start P0112.
I did unplug TPS and MAP to check make sure they had 5v from ECU but plugged both back in. Cleared codes multiple time removed battery fuse and ecu fuse nothing seemed make these 2 new codes go away. So now that have 5v at connector to IAT now have two new codes that seem not go away....
 

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Discussion Starter · #5 ·
Had a ground to the computer unhooked because ran my own ground directly from sensor problem is once you do this you elminiate the ground to computer for 3 other sensors too, due to their common ground. Hooked this back up but still getting IAT low voltage circuit code P0112, and IACV code too.
Whats weird is now have 5 v at the connector but after hooking IAT connector up it up the volts drops to 0 v. Have a new IAT sensor and old one, both test 0.08 ohms (also the resistance of the ohm meter is).
Can anyone take and test their IAT sensor on vehicle that has no codes and post the ohms on good sensor? Right now looks like both brand new IAT sensor and old one are bad because should be getting more ohms.
 

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Discussion Starter · #6 ·
Anyone know is possible to replace engine harness without removing dash ? KNow the harness comes through passenger side firewall and comes around blower motor in some way but not sure how close.
 

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Discussion Starter · #8 ·
What about the part of the harness that comes through near the battery and hooks to the computer on passenger side?
That cables run right past the blower motor under the dash right?
 
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