IACV/EACV- Stuck in cold weather mode?
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Joined: Jun 2007
Posts: 10,023
You're missing the point.
When you disconnected the wire and found the engine slows down to 500 rpm, that demonstrates that the ECU is commanding the idle to increase by driving voltage to the IACV. The IACV is/was good, it is doing what it was told.
The ECU is programmed to increase idle while it is receiving a low temperature reading from the ECT sensor. This happens every day in normal operation while the engine is warming up.
When you disconnected the wire and found the engine slows down to 500 rpm, that demonstrates that the ECU is commanding the idle to increase by driving voltage to the IACV. The IACV is/was good, it is doing what it was told.
The ECU is programmed to increase idle while it is receiving a low temperature reading from the ECT sensor. This happens every day in normal operation while the engine is warming up.
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