Mazda 6. Manual — part 24
F–32
CONTROL SYSTEM
CONTROL DEVICES AND CONTROL RELATIONSHIP CHART
A6E394018881T04
Engine Control System
Input devices
x: Applicable
Component
IAT sensor
x
x
x
x
x
x
x
×
MAF sensor
x
x
x
x
x
x
x
x
TP sensor
x
x
x
x
x
x
x
x
MAP sensor
x
x
ECT sensor
x
x
x
x
x
x
x
x
x
x
x
CMP sensor
x
x
CKP sensor
x
x
x
x
x
x
x
x
x
x
x
x
x
Knock sensor
x
Front HO2S
x
x
Rear HO2S
x
BARO sensor
x
Neutral switch
x
x
x
x
Clutch switch
x
x
x
x
x
TR switch
x
x
x
x
x
Brake switch
PSP switch
x
x
x
VSS
×
A/C switch, refrigerant
pressure switch (high,
low pressure)
x
x
x
×
×
Refrigerant pressure
switch (middle pressure)
×
Battery voltage
x
x
x
×
Generator terminal P
(Generation voltage)
x
x
x
×
ABS/TCS HU/CM
×
Coil
×
CONTROL SYSTEM
F–33
F
Output devices
×
: Applicable
End Of Sie
Component
IAC valve
×
VAD control solenoid valve
×
VIC solenoid valve
×
VTCS solenoid valve
×
Oil control valve (OCV)
×
Fuel injectors
×
×
Fuel pump relay
×
Ignition coil
×
×
Purge solenoid valve
×
EGR valve
×
HO2S heaters
×
×
A/C relay
×
Cooling fan relay
×
Generator (terminal D: field
coil)
×
ABS/TCS HU/CM
×
F–34
CONTROL SYSTEM
CAMSHAFT POSITION (CMP) SENSOR
A6E394018881T05
Outline
•
For cylinder identification, the CMP sensor detects a camshaft angle of 30 degree after the top dead center in
cylinder No. 1.
•
The wave form of CMP sensor output is shown in the figure.
.
End Of Sie
CRANKSHAFT POSITION (CKP) SENSOR
A6E394018881T06
Outline
•
For detecting the crankshaft angle, the CKP sensor detects pulsation signals from pulse wheel.
•
The wave form of CKP sensor output is shown in the figure.
.
A6E3940T021
1
CMP sensor
2
Camshaft for inlet valve
3
Camshaft angle 30 degree
4
Crankshaft angle
5
CMP sensor output signal
6
LF and L8 engine model
7
L3 engine model
A6E3940T022
CONTROL SYSTEM
F–35
F
End Of Sie
IDLE AIR CONTROL (IAC)
A6E394018881T07
Outline
•
The IAC of the Mazda6 (GG) is essentially carried over from the current MPV (LW) FS engine models except
for the followings.
— Add the MAP factor to the feedback correction
— Target engine speed is different caused to match the vehicle characteristics.
Target Engine Speed
*
1
: Headlight is on, fan switch is above 1st, cooling fan is operating, and rear window defroster is on.
*
2
: A/C switch and fan switch are on.
End Of Sie
VARIABLE AIR DUCT (VAD) CONTROL
A6E394018881T08
Outline
•
The VAD control system opens the VAD shutter valve in the air cleaner only at high engine speeds so that
engine performance does not decrease at high engine speeds due to insufficient mass airflow amount.
Operation
•
The PCM turns the VAD control solenoid valve ON to open the VAD shutter valve when all of the following
conditions have been met.
— ECT: above 70
°
C [158
°
F]
— Engine speed: above 5,800 rpm
— TP angle: above 50%
End Of Sie
VARIABLE INTAKE-AIR SYSTEM
A6E394018881T09
Outline
•
The VIS system of the Mazda6 (GG) is essentially carried over from the VICS of the current MPV (LW) FS
engine models except for operation conditions.
Operation Conditions
•
The PCM energized/de-energized the VIS solenoid valve at the engine speed of approx 4,400 rpm.
End Of Sie
VARIABLE TUMBLE CONTROL SYSTEM (VTCS)
A6E394018881T10
Outline
•
The VTCS actuates the VTCS shutter valve in the intake manifold to increase the intake air flowing speed and
create the tumbling air in the combustion chamber for better injected fuel atomization, thus reduces the HC and
CO exhaust emissions at light load.
1
Pulse wheel
2
CKP sensor
3
Crankshaft angle
4
CKP sensor output signal
Condition
Idle speed (rpm)
L8
LF MTX
LF ATX
L3
No load
700
650
700
650
Electrical load is on.*
1
700
700
700
700
P/S is operating.
750
700
700
700
A/C is operating.*
2
(Middle pressure switch OFF or Not equipped)
750
750
700
750
A/C is operating.*
2
(Middle pressure switch ON if equipped)
750
750
750
750
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