Mazda 6. Manual — part 128
F–48
CONTROL SYSTEM
End Of Sie
KNOCKR (Knocking
retard)
ANGLE
Ignition switch ON: 0 DEG
Idle: 0 DEG
2P, 2S
LOAD (Engine load)
%
Ignition switch ON: 0%
Idle (after warm up): approx.19%
)
—
LONGFT1 (long term
fuel trim)
%
Idle (after warm up): approx.–14—
14%
Perform applicable DTC
troubleshooting.
(See
—
MAF (Mass airflow)
g/s
Ignition switch ON: approx. 0 g/s
Idle (after warm up): 1.5 g/s
1P
V
Ignition switch ON: approx. 0.7 V
Idle (after warm up): 1.3 V
MAP (Manifold
absolute pressure)
Pressure
Ignition switch ON (at sea level):
approx 101 kPa
PRESSURE (MAP) SENSOR
INSPECTION
1J
V
Ignition switch ON (at sea level):
approx 4.1 V
MIL (Malfunction
indicator lamp)
ON/OFF
Ignition switch ON: ON
Idle: OFF
Perform applicable DTC
troubleshooting.
(See
—
MIL_DIS (Trabelled
distance since the MIL
illuminated)
Distance
No DTC: 0 km {0 mph}
DTC detected: Not 0 km {0 mph}
Perform applicable DTC
troubleshooting.
(See
—
O2S11 (Front oxygen
sensor)
V
Ignition switch ON: 0—1.0 V
Idle (After warm up): 0—1.0 V
Acceleration (After warm up):
0.5—1.0 V
Deceleration (After warm up):
0—0.5 V
1AB
O2S12 (Rear oxygen
sensor)
V
Idle (After warm up): approx 0.6 V
1Y
PSP (Power steering
pressure switch)
ON/OFF
Steering wheel in straight ahead
position: OFF
Others: ON
PRESSURE (PSP) SWITCH
INSPECTION
1Z
RFCFLAG (Readness
function code)
ON/OFF
Before running PCM adaptive
memory procedure drive mode: ON
After running PCM adaptive memory
procedure drive mode: OFF
Run PCM adaptive memory
procedure drive mode.
(See
—
RO2FT1 (Rear oxygen
sensor fuel trim)
%
Idle (after warm up): approx.–14—
14%
Perform applicable DTC
troubleshooting.
(See
—
RPM (Engine speed)
rpm
L8
No load: 650—750 rpm
E/L operating: 650—750 rpm
P/S operating: 700—800 rpm
A/C ON: 700—800 rpm
LF MTX and L3 MTX
No load: 600—700 rpm
E/L operating: 650—750 rpm
P/S operating: 650—750 rpm
A/C ON: 700—800 rpm
LF ATX
No load: 650—750 rpm
E/L operating: 650—750 rpm
P/S operating: 650—750 rpm
A/C ON: 650—750 rpm*
2
, 700—
800 rpm*
3
2D, 2G
Monitor item
(Definition)
Unit/
Condition
Condition/Specification
(Reference)
Action
PCM
terminal
CONTROL SYSTEM
F–48–1
F
F–48FUEL AND EMISSION CONTROL SYSTEMS
PCM INSPECTION
A6E394018880W02A
*
1
: Calculated value; differs from terminal voltage
*
2
: Refrigerant pressure switch (middle) turns on when the refrigerant pressure is 1.69—1.84 MPa {17.3—18.7
kgf/cm2, 247—265 psi}
*
3
: Refrigerant pressure switch (middle) turns off when the refrigerant pressure is 1.26—1.49 MPa {12.9—15.1
kgf/cm2, 184—214 psi}
*
4
: L3 and L8, LF (Intensely hot area) models
*
5
: Immobilizer system equipped
*
6
: Immobilizer system not equipped
• Following PIDs are for the ATX models. If inspects for following PIDs, see
PIDs for the ATX models
— GEAR
— LINEDES
— LPS
— OP_SW_B
— SSA/SS1
— SSB/SS2
— SSC/SS3
— TCS
— TFT
— TFTV
— THOP
— TR
— TR_SENS
— TSS
CONTROL SYSTEM
Monitor item
(Definition)
Unit/
Condition
Condition/Specification
(Reference)
Action
PCM
terminal
SHRTFT1 (Short term
fuel trim)
%
Idle (after warm up): approx.–30—
25%
Perform applicable DTC
troubleshooting.
(See
—
SPARKADV (Ignition
timing)
BTC
Ignition switch ON: BTDC 0
°
Idle: BTDC approx. 10
°
Inspect following PIDs: MAF, TP,
ECT, RPM, INGEAR, TR, PSP,
ACSW, VPWR.
Inspect ignition timing.
(See
2J
2M
TEST (Test mode)
ON/OFF
—
—
—
TP (TP)
%
CTP: 13—23%
WOT: 86—96%
Inspect TP sensor.
(See
2A
V
CTP: 0.65—1.15 V
WOT: 4.3—4.8 V
TPCT
(TP sensor voltage at
CTP )
V
0.65—1.15 V
Inspect TP sensor.
(See
2A
VPWR (Battery positive
voltage)
V
Ignition switch ON: B+
Inspect main relay.
(See
Inspect battery.
(See
2Y, 2Z
VSS (Vehicle speed)
km/h
MPH
Vehicle speed 20 km/h {12 mph}:
20 km/h {12 mph}
Vehicle speed 40 km/h {25 mph}:
20 km/h {12 mph}
Perform applicable DTC
troubleshooting.
(See
—
VT DUTY1
ANGLE
Idle: 0
°
Inspect following PIDs: TP, ECT,
RPM.
Inspect OCV.
(See
2I, 2L
%
Idle: 0%
CONTROL SYSTEM
F–48–2
Without Using the SST
Caution
• The PCM terminal voltages vary with change in measuring conditions and vehicle conditions.
Always carry out a total inspection of the input systems, output systems, and PCM to determine
the cause of trouble. Otherwise, a wrong diagnosis will be made.
1. Measure the voltage at each terminal.
• If any incorrect voltage is detected, inspect the related system(s), wiring harnesses and connector(s)
referring to the Action column in the terminal voltage table.
Terminal voltage table (Reference)
Terminal
Signal
Connected to
Test condition
Voltage
(V)
Action
1A
IGT1
Ignition coil (No. 1,
4 cylinders)
• Inspect using the wave profile.
(See
• Inspect ignition coil
(See
• Inspect related
harness
1B
IGT2
Ignition coil (No. 2,
3 cylinders)
• Inspect using the wave profile.
(See
• Inspect ignition coil
(See
• Inspect related
harness
1C
GND
GND
Under any condition
Below 1.0
• Inspect related
harness
1D
GND
GND
Under any condition
Below 1.0
• Inspect related
harness
1E
—
—
—
—
—
1F
—
—
—
—
—
1G
Atmospheric
pressure
BARO sensor
Ignition switch ON (Engine OFF
at sea level)
Approx.
4.0
• Inspect BARO sensor
(See
BAROMETRIC
PRESSURE (BARO)
SENSOR
INSPECTION
• Inspect related
harness
Ignition switch OFF
Below 1.0
1H
—
—
—
—
—
1I
—
—
—
—
—
1J
Manifold absolute
pressure
MAP sensor
Ignition switch ON (Engine OFF
at sea level)
Approx.
4.1
• Inspect MAP sensor
(See
MANIFOLD
ABSOLUTE
PRESSURE (MAP)
SENSOR
INSPECTION
• Inspect related
harness
Idle (at sea level)
Approx.
1.5
1K
Brake
Brake switch
Brake pedal depressed
B+
• Inspect brake switch
• Inspect related
harness
Brake pedal released
Below 1.0
1L
—
—
—
—
—
1B
1A
1E
1D
1C
1H
1G
1J
1F
1I
1M
1L
1N 1K
1T 1Q
1P
1S
1O
1R
1W
1V
1Z
1Y
1X
1AC
1AB
1AA
1AD
1U
2B
2A
2E
2D
2C
2H
2G
2J
2F
2I
2M
2L
2N 2K
2T 2Q
2P
2S
2O
2R
2W
2V
2Z
2Y
2X
2AC
2AB
2AA
2AD
2U
3B
3A
3E
3D
3C
3H
3G
3J
3F
3I
3M
3L
3N 3K
3T 3Q
3P
3S
3O
3R
3W
3V
3Z
3Y
3X
3AA
3U
4B
4A
4E
4D
4C
4H
4G
4J
4F
4I
4M
4L
4N 4K
4T 4Q
4P
4S
4O
4R
4W
4V
4Z
4Y
4X
4AC
4AB
4AA
4AD
4U
A6A3940W002
CONTROL SYSTEM
F–48–3
F
1M
ECT
ECT sensor
Ignition switch
ON
ECT 20
°C
{68
°F}
3.04—
3.14
• Inspect ECT sensor
(See
COOLANT
TEMPERATURE
(ECT) SENSOR
INSPECTION
)
• Inspect related
harness
ECT 60
°C
{140
°F}
1.29—
1.39
1N
—
—
—
—
—
1O
—
—
—
—
—
1P
MAF
MAF sensor
Ignition switch ON
Approx.
0.7
• Inspect MAF sensor
(See
)
• Inspect related
harness
Idle (after warm up)
Approx.
1.3
1Q
Refrigerant
pressure switch
(middle)
Refrigerant
pressure switch
(middle)
A/C ON
Refrigerant
pressure is
above 1.52
MPa {15.5 kgf/
cm
2
, 220 psi}
Below 1.0
• Inspect refrigerant
pressure switch
• Inspect related
harness
Refrigerant
pressure is
below 1.23
MPa {12.5 kgf/
cm
2
, 178 psi}
B+
1R*
1
Clutch operation
Clutch switch
Clutch pedal depressed
Below 1.0
• Inspect clutch switch
(See
)
• Inspect related
harness
Clutch pedal released
B+
1S
—
—
—
—
—
1T
—
—
—
—
—
1U
—
—
—
—
—
1V
—
—
—
—
—
1W
Neutral position*
1
Neutral switch
Shift lever is at neutral position
Below 1.0
• Inspect neutral switch
(See
)
• Inspect related
harness
Shift lever is not at neutral
position
B+
Selector lever
position*
2
TR switch
(terminal C)
Ignition switch
ON
P range
Approx.
4.6
• Inspect TR switch
• Inspect related
harness
R range
Approx.
3.9
N range
Approx.
3.2
D range*
3
M range*
4
Approx.
2.5
S range*
3
Approx.
1.7
L range*
3
Approx.
0.94
1X
—
—
—
—
—
1Y
HO2S (rear)
HO2S (rear)
Ignition switch ON
Approx. 0
• Inspect HO2S (rear)
(See
OXYGEN SENSOR
(HO2S)
INSPECTION
)
• Inspect related
harness
Idle (after warm up)
0—1.0
Terminal
Signal
Connected to
Test condition
Voltage
(V)
Action
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