IDLE AIR CONTROL (IAC) BLOCK DIAGRAM[ZJ, ZY, Z6]


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Without Throttle Valve Actuator Only

•  The PCM determines the engine operation conditions based on input signals and sends an operation signal to the IAC valve.
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1
Neutral switch (MTX)
2
CPP switch (MTX)
3
PSP switch
4
ECT sensor
5
IAT sensor
6
CKP sensor
7
TP sensor
8
MAF sensor
9
Vehicle speed signal
10
TR switch (ATX)
11
A/C on request signal
12
Refrigerant pressure switch (low pressure switch, high pressure switch)
13
Refrigerant pressure switch (medium pressure switch)
14
IAC valve drive time
15
IAC target airflow amount
16
Required volume airflow
17
Required mass
18
Target charging efficiency
19
Basic charging efficiency
20
Corrections
21
IAC valve
22
BARO sensor (If equipped)