Mazda 6. Manual — part 127

F–44

CONTROL SYSTEM

European (L.H.D.) specs.

.

Set Nut/bolt Removal Note

1. Using a chisel and a hammer, cut a groove on the head of the set nut/bolt so that a screwdriver can be

inserted.

2. Loose the set nut/bolt using an impact

screwdriver or pliers.

Set Nut/bolt Installation Note

1. Install a new set nut/bolt and tighten it until the

neck of the nut/bolt is cut.

End Of Sie

A6E3940W001

1

PCM cover

2

PCM connector

3

PCM

A6E3940W003

A6E3940W004

CONTROL SYSTEM

F–45

F

PCM INSPECTION

A6E394018880W02

Using SST (WDS or Equivakent)

Note

• PIDs for the following parts are not available on this model. Go to the appropriate part inspection page.

— CMP sensor (See

F–55 CAMSHAFT POSITION (CMP) SENSOR INSPECTION

.)

— Main relay (See

T–24 RELAY INSPECTION

.)

1. Connect the SST (WDS or equivalent) to the

DLC-2.

2. Turn the ignition switch to ON position.
3. Measure the PID value.

• If PID value is not within the specification,

follow the instructions in Action column.

Note

• The PID/DATA MONITOR function monitors

the calculated value of the input/output
signals in the PCM. Therefore, an output
device malfunction is not directly indicated
as a malfunction of the monitored value for
the output device. If a monitored value of an
output device is out of specification, inspect the monitored value of the input device related to the output
control.

• For input/output signals except those of the monitoring items, use a voltmeter to measure the PCM

terminal voltage.

• The simulation items that are used in the ENGINE CONTROL SYSTEM OPERATION INSPECTION are

as follows.
— ACCS
— ALTF
— EVAPCP
— FAN1
— FAN2
— FAN3
— FP
— HTR11
— HTR12
— IAC
— IASV
— IMRC
— IMTV
— VT DUTY1

PID/DATA monitor table (reference)

DLC-2

A6E3970W002

Monitor item

(Definition)

Unit/

Condition

Condition/Specification

(Reference)

Action

PCM

terminal

ACCS (A/C relay)

ON/OFF

Ignition switch ON: OFF
A/C switch ON and fan switch ON at
idle: ON

Inspect following PIDs: RPM, TP,
ECT, ACSW, TR.
Inspect A/C relay.
(See

U–47 CLIMATE CONTROL

UNIT INSPECTION

)

4O

ACSW (A/C switch)

ON/OFF

A/C switch and fan switch ON at
ignition switch ON: OFF
A/C switch OFF at ignition switch
ON: OFF

Inspect A/C switch.
(See

U–47 CLIMATE CONTROL

UNIT INSPECTION

)

1AC

ALTF (Generator field
coil control duty value)

%

Ignition switch ON: 0%
Idle: 0—100%
Just after A/C switch ON and fan
switch ON at idle: Duty value rises

Inspect following PIDs: IAT, ECT,
RPM, VPWR, ALTT V.
Inspect generator.
(See

G–7 GENERATOR

INSPECTION

)

1AD

ALTT V (Generator
output voltage)

V

Ignition switch ON: 0 V
Idle: Approx. 14.9 V

*1

(E/L not

operating)

Inspect generator.
(See

G–7 GENERATOR

INSPECTION

)

1AA

F–46

CONTROL SYSTEM

ARPMDES
(Target engine speed)

RPM

L8

No load: 700 rpm
E/L operating: 700 rpm
P/S operating: 750 rpm
A/C ON: 750 rpm

LF MTX and L3 MTX

No load: 650 rpm
E/L operating: 700 rpm
P/S operating: 700 rpm
A/C ON: 750 rpm

LF ATX

No load: 700 rpm
E/L operating: 700 rpm
P/S operating: 700 rpm
A/C ON: 700 rpm*

2

, 750 rpm*

3

Inspect following PIDs: IAT, RPM,
MAP, ECT, MAF, TP, INGEAR,
ACSW, TR, PSP, ALTT V.
Inspect IAC valve.
(See

F–13 IDLE AIR CONTROL

(IAC) VALVE INSPECTION

)

Inspect CKP sensor.
(See

F–54 CRANKSHAFT POSITION

(CKP) SENSOR INSPECTION

)

—

AST (After start timer)

Time

—

—

—

BARO
(Barometric pressure)

Pressure

Ignition switch ON (at sea level):
approx 101 kPa

Inspect BARO sensor.
(See

F–60 BAROMETRIC

PRESSURE (BARO) SENSOR
INSPECTION

)

1G

V

Ignition switch ON (at sea level):
approx 4.1 V

BOO
(Brake switch)

ON/OFF

Brake pedal depressed: ON
Brake pedal released: OFF

Inspect brake switch.
(See

P–8 BRAKE SWITCH

INSPECTION

)

1K

CHRGLMP (Generator
warning light)

ON/OFF

Ignition switch ON: ON
Idle: OFF

Perform applicable DTC
troubleshooting.
(See

F–67 DTC TABLE

)

—

COLP (Refrigerant
pressure switch
(middle))*

4

ON/OFF

Refrigerant pressure switch (middle)
ON

*2

at idle: ON

Refrigerant pressure switch (middle)
OFF

*3

at idle: OFF

Inspect refrigerant pressure switch.
(See

U–43 REFRIGERANT

PRESSURE SWITCH INSPECTION

)

1Q

CPP
(Clutch pedal position)

ON/OFF

Clutch pedal depressed: ON
Clutch pedal released: OFF

Inspect clutch switch.
(See

F–59 CLUTCH SWITCH

INSPECTION

)

1R

CPP/PNP (Shift lever
position)

ON/OFF

Neutral position: ON
Others: OFF

Inspect neutral switch.
(See

F–59 NEUTRAL SWITCH

INSPECTION

)

1W

DTCCNT (Number of
DTC detected)

—

—

Perform applicable DTC
troubleshooting.
(See

F–67 DTC TABLE

)

—

ECT (Engine coolant
temperature)

°C

°F

ECT 20

°C {68 °F}: 20 °C {68 °F}

ECT 60

°C {140 °F}: 60 °C {140 °F}

Inspect ECT sensor.
(See

F–53 ENGINE COOLANT

TEMPERATURE (ECT) SENSOR
INSPECTION

)

1M

V

ECT 20

°C {68 °F}: 3.04—3.14 V

ECT 60

°C {140 °F}: 1.29—1.39 V

EVAPCP (Purge
solenoid valve duty
value)

%

Ignition switch ON: 0%
Idle: 0%

Inspect following PIDs: IAT, RPM,
ECT, MAF, O2S11,BARO, INGEAR,
TR, VPWR.
(See

F–39 PURGE SOLENOID

VALVE INSPECTION

)

4U

FAN1
(Cooling fan control)

ON/OFF

ECT below 100

°C {212 °F}: OFF

Others: ON

Inspect following PIDs: RPM, TP,
ECT, ACSW, COLP, TEST.
Inspect cooling fan relay.
(See

T–24 RELAY INSPECTION

)

4L

FAN2
(Cooling fan control)

ON/OFF

ECT below 108

°C {226 °F}: OFF

A/C operating, refrigerant pressure
switch (middle) is OFF, and ECT
below 108

°C {226 °F}: OFF

Others: ON

Inspect following PIDs: RPM, TP,
ECT, ACSW, COLP, TEST.
Inspect cooling fan relay.
(See

T–24 RELAY INSPECTION

)

4F

FAN3
(Cooling fan control)

ON/OFF

ECT below 100

°C {212 °F}: OFF

A/C operating, refrigerant pressure
switch (middle) is ON, and ECT
below 108

°C {226 °F}: OFF

Other: ON

Inspect following PIDs: RPM, TP,
ECT, ACSW, COLP, TEST.
Inspect cooling fan relay.
(See

T–24 RELAY INSPECTION

)

4B

Monitor item

(Definition)

Unit/

Condition

Condition/Specification

(Reference)

Action

PCM

terminal

CONTROL SYSTEM

F–47

F

FDPDTC
(Pending code caused
FFD storage)

—

—

Perform applicable DTC
troubleshooting.
(See

F–67 DTC TABLE

)

—

FP (Fuel pump relay)

ON/OFF

Ignition switch ON: OFF
Idle: ON
Cranking: ON

Inspect following PIDs: RPM.
Inspect fuel pump relay.
(See

T–24 RELAY INSPECTION

)

4P

*5

4Q

*6

FUELPW (Fuel injector
duration)

TIME

Ignition switch ON: 0 ms
Idle (after warm up): approx. 2.5 ms

Inspect following PIDs: IAT, MAF, TP,
MAP, ECT, RPM, O2S11, O2S12,
INGEAR, TR, PSP, ACSW, VPWR,
ALTT V.
Inspect fuel injector.
(See

T–24 RELAY INSPECTION

)

4W, 4Z,

4AA,

4AD

FUELSYS
(Fuel system status)

Open loop/

Closed loop

Ignition switch ON: Open loop
Idle (after warm up): Closed loop

Inspect following PIDs: IAT, MAF, TP,
MAP, ECT, RPM, O2S11, O2S12,
INGEAR, TR, PSP, ACSW, VPWR,
ALTT V.
Inspect fuel injector.
(See

T–24 RELAY INSPECTION

)

—

GENVDSD
(Generator voltage
desired)

V

Ignition switch ON: 0 V
Idle: Approx. 14.9 V

*1

(E/L not

operating)

Perform applicable DTC
troubleshooting.
(See

F–67 DTC TABLE

)

—

HTR11
(HO2S heater (front))

ON/OFF

Idle (after warm up): ON

⇔OFF

Inspect following PIDs: IAT, MAF, TP,
ECT, RPM, ACSW.
(See

F–56 HEATED OXYGEN

SENSOR (HO2S) INSPECTION

)

4A

HTR12
(HO2S heater (rear))

ON/OFF

Ignition switch ON: OFF (HO2S
heater not operating)
Idle: ON (HO2S heater operating)

Inspect following PIDs: IAT, MAF,
ECT, RPM, ACSW.
(See

F–56 HEATED OXYGEN

SENSOR (HO2S) INSPECTION

)

4D

IAC (IAC valve)

%

Ignition switch ON: 0%
Idle: Approx. 60% (ECT 90

°C {194

°F} and E/L not operating)

Inspect following PIDs: IAT, RPM,
MAP, ECT, MAF, TP, INGEAR, TR,
PSP, ACSW.
Inspect IAC valve.
(See

F–13 IDLE AIR CONTROL

(IAC) VALVE INSPECTION

)

4G

4J

IASV (Variable air duct
control solenoid valve)

ON/OFF

ECT is above 70

°C {158 °F}, engine

speed is above 5,800 rpm, and TP
opening angle is above 50%: ON
Others: OFF

Inspect following PIDs: ECT, RPM,
TP.
Inspect VAD control solenoid valve.
(See

F–13 VARIABLE AIR DUCT

(VAD) CONTROL SOLENOID VALVE
INSPECTION (L3)

4C

IAT
(Intake air temperature)

°C

°F

IAT 20

°C {68 °F}: 20 °C {68 °F}

IAT 30

°C {86 °F}: 30 °C {86 °F}

Inspect IAT sensor.
(See

F–50 INTAKE AIR

TEMPERATURE (IAT) SENSOR
INSPECTION

)

2E

V

IAT 20

°C {68 °F}: 2.4—2.6 V

IAT 30

°C {86 °F}: 1.7—1.9 V

IMRC (Variable tumble
control solenoid valve)

ON/OFF

Engine speed is below approx.
3,750 rpm: ON
Others: OFF

Inspect following PIDs: TP, ECT,
RPM.
Inspect VTCS solenoid valve.
(See

F–15 VARIABLE TUMBLE

CONTROL SOLENOID VALVE
INSPECTION

)

4T

IMTV (Variable Intake-
air control solenoid
valve)

ON/OFF

Engine speed is below approx.
4,500 rpm: ON
Others: OFF

Inspect following PIDs: RPM.
Inspect VIS control solenoid valve.
(See

F–14 VARIABLE INTAKE-AIR

SYSTEM (VIS) CONTROL
SOLENOID VALVE INSPECTION
(L3)

)

4R

INGEAR (Load/no load
condition)

ON/OFF

CPP or CPP/PNP is ON: OFF
Others: ON

Perform applicable DTC
troubleshooting.
(See

F–67 DTC TABLE

)

1R, 1W

IVS (CTP condition)

ON/OFF

CTP: ON
Others: OFF

Perform applicable DTC
troubleshooting.
(See

F–67 DTC TABLE

)

2A

Monitor item

(Definition)

Unit/

Condition

Condition/Specification

(Reference)

Action

PCM

terminal