2002 MAZDA 6 Workshop Manual Suplement

CONTROL SYSTEM
F1–17
F1
BLOCK DIAGRAMA6E394018880203
.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
1832
31
30
29
28
27
26
25
24
23
22
21
20
1933
34
35
36
37
38
39
40
41
42
43
44
45
46
A6E3940T001

F1–18
CONTROL SYSTEM
*1: For MTX model
*2: For 2WD ATX model
*3: For L3 engine
End Of Sie
1 MAF/IAT sensor
2 TP sensor
3 MAP sensor
4 CMP sensor
5 CKP sensor
6 ECT sensor
7 Knock sensor
8 HO2S (front, rear)
9 PSP switch
10 Vehicle speedometer sensor
11
Clutch switch*
1
12
Neutral switch*1
13
TR switch*2
14 Brake switch
15 A/C switch
16 Refrigerant pressure switch
17 Generator (terminal P: generation voltage)
18 Battery
19
VAD control solenoid valve*
3
20 IAC valve
21
VIC solenoid valve*
3
22 Variable tumble control solenoid valve
23
OCV*
3
24 Fuel injector
25 Fuel pump relay
26 Ignition coil
27 Purge solenoid valve
28 EGR valve
29 Oxygen sensor heater (front, rear)
30 A/C relay
31 Cooling fan relay
32 Generator (terminal D: field coil)
33
VAD control*
3
34 IAC
35
VIC*
3
36 VTCS
37
Variable valve timing control*
3
38 Fuel injection control
39 Fuel pump control
40 Electronic spark advance (ESA) control
41 Purge control
42 EGR control
43 Oxygen sensor heater control
44 A/C cut-off control
45 Electrical fan control
46 Generator control

CONTROL SYSTEM
F1–19
F1
CONTROL DEVICE AND CONTROL RELATIONSHIP CHARTA6E394018880204Input devices
x: Applicable
*
1: For unleaded fuel (RON 90 or above) model
*2: For MTX model
*3: For 2WD ATX model
Component
IAT sensor x x x xxxx×
MAF sensor x xx xxxxx
TP sensor x x x x x x x x
MAP sensor x x
ECT sensor xx xxx xxxxx x
CMP sensor x x
CKP sensor xxxxxxxxxxxxx
Knock sensor x
Front HO2S x x
Rear HO2S x
BARO sensor*
1x
Neutral switch*
2xxxx
Clutch switch*
2xxxxx
TR switch*
3xxxxx
Brake switch
PSP switch x x x
VSS×
A/C switch, refrigerant
pressure switch (high,
low pressure)xxx××
Refrigerant pressure
switch (middle pressure)×
Battery voltage x x x×
Generator terminal P
(Generation voltage)xxx×
ABS/TCS HU/CM×
Coil×
Idle air control (IAC)Variable air duct (VAD)
controlVariable intake-air
control (VIC)Variable tumble
control system (VTCS)Variable valve timing controlFuel injection controlFuel pump controlElectronic spark advance
(ESA) controlPurge controlEGR controlFront HO2S heater controlRear HO2S heater controlA/C cut-off controlElectrical fan controlGenerator controlTraction controlImmobilizer system

F1–20
CONTROL SYSTEM
Output devices
×: Applicable
* : For L3 engine
End Of Sie
Component
IAC valve×
VAD control solenoid valve*×
VIC solenoid valve*×
Variable tumble control
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×
Idle air control (IAC)Variable air duct (VAD)
controlVariable intake-air
control (VIC)Variable tumble
control system (VTCS)Variable valve timing controlFuel injection controlFuel pump controlElectronic spark advance
(ESA) controlPurge controlEGR controlFront HO2S heater controlRear HO2S heater controlA/C cut-off controlElectrical fan controlGenerator controlTraction controlImmobilizer system

CONTROL SYSTEM
F1–21
F1
CONTROLLER AREA NETWORK (CAN)A6E394018880205•PCM transmit/received the information in the CAN. For detail information of the CAN, see the “MULTIPLEX
COMMUNICATION SYSTEM.” (See T–3 OUTLINE.)
Transmit Information (4WD ATX Model)
•Engine control condition
•Torque reduction inhibit
•Engine speed
•Vehicle Speed
•TP
•Engine torque (without torque reduction)
•Engine torque (with torque reduction)
•Battery reconnection
•Engine loss torque
•ECT
•Travelled distance
•Fuel injection information
•MIL condition
•Generator warning light conditions
•Engine displacement
•Number of cylinders
•Air induction type
•Fuel type and delivery
•Country
•Transmission/axle type
•Tire circumference (front/rear)
Received Information (4WD ATX Model)
From ABS HU/CM, ABS/TCS HU/CM, or DSC HU/CM
•Wheel speed
—Front left, Front right, Rear left, and Rear right
•Travelled distance
•Brake system status
•Torque reduction request
•Brake system configuration
From TCM
•Desired torque
•Upper torque limit
•Turbineshaft speed
•Vehicle speed
•Torque reduction request
•Idle speed up request
•Racing select determination
•MIL indicate request
•Desired gear/selector lever position
•AT warning indicator light condition
•TCC condition
End Of Sie

F1–22
OUTLINE, ENGINE TUNE-UP
SUPPLEMENTAL SERVICE INFORMATIONA6E390218881206•The following changes and/or additions have been made since publication of the Mazda6 Workshop Manual
(1621-10-98E).
Idle speed
•Adjustment procedure has been modified.
Fuel tank
•Removal/installation procedure has been modified.
Fuel pump unit
•Removal/installation procedure has been modified.
Quick release connector (fuel tank side, transfer hose part)
•Removal/installation procedure has been added.
Exhaust system
•Removal/installation procedure has been modified.
PCM
•Inspection procedure has been modified.
On-board diagnostic
•Inspection procedure has been modified.
Troubleshooting
•Inspection procedure has been modified.
End Of Sie
IDLE SPEED INSPECTION (4WD)A6E390802000201
Note
•Ignition timing is not adjustable.
•Ignition timing verification requires WDS or equivalent.
1. Turn off the electrical loads.
2. Warm up the engine as follows.
(1) Start the engine.
(2) Maintain the engine speed at approx. 3,000 rpm until the cooling fans start to operate.
(3) Release the accelerator pedal.
(4) Wait until the cooling fans stop.
3. Verify that the idle speed (WDS: RPM PID) is within the specification using WDS or equivalent.
Idle speed
*1 : Excludes temporary idle speed drop just after the electrical loads are turned on.
*2 : Blower motor is operating at high speed. Headlight switch is turned on. Rear window defroster switch is turned
on. Cooling fans are operating.
End Of Sie
OUTLINE
ENGINE TUNE-UP
Condition
Engine speed (rpm)*1
No load 650—750
Electrical loads*
2 ON650—750
P/S ON 650—750
A/C ON and refrigerant
pressure switch (middle) OFF650—750
A/C ON and refrigerant
pressure switch (middle) ON700—800

FUEL SYSTEM
F1–23
F1
FUEL TANK REMOVAL/INSTALLATIONA6E391242110201
Warning
•Repairing a fuel tank that has not been properly steam cleaned can be dangerous. Explosion or
fire may cause death or serious injury. Always properly steam clean a fuel tank before repairing it.
•Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and
damage. Fuel can also irritate skin and eyes. To prevent this, do not damage the sealing surface of
the fuel pump unit when removing or installing.
Caution
•Disconnecting/connecting the quick release connector without cleaning it may possibly cause
damage to the fuel pipe and quick release connector. Always clean the quick release connector
joint area before disconnecting/connecting using a cloth or soft brush, and make sure that it is
free of foreign material.
1. Level the vehicle.
2. Complete the “BEFORE REPAIR PROCEDURE”.
3. Disconnect the negative battery cable.
4. Remove the fuel pump unit. (See F1–26 FUEL PUMP UNIT REMOVAL/INSTALLATION.)
5. Remove the fuel gauge sender sub-unit. (See T–27 Fuel Gauge Sender Sub-Unit.)
6. Siphon the fuel from the service hole.
7. Remove the presilencer. (See F1–30 EXHAUST SYSTEM REMOVAL/INSTALLATION.)
8. Remove the TWC. (See F1–30 EXHAUST SYSTEM REMOVAL/INSTALLATION.)
9. Remove the propeller shaft. (See L–5 PROPELLER SHAFT REMOVAL/INSTALLATION.)
FUEL SYSTEM

F1–24
FUEL SYSTEM
10. Remove in the order indicated in the table.
11. Install in the reverse order of removal.
12. Complete the “AFTER REPAIR PROCEDURE”.
.
44—60
{4.5—6.1, 33—44}
7
5
4
3
2
1
6
A
N·m {kgf·m, ft·lbf} 44—60
{4.5—6.1, 33—44}
44—60
{4.5—6.1, 33—44}8.9—12.7 N·m
{91—120 kgf·cm, 79—110 in·lbf}
8.9—12.7 N·m
{91—120 kgf·cm, 79—110 in·lbf}
A6E39122008
1 Joint hose
(See F1–25 Joint Hose Installation Note)
2 Breather hose
(See F1–25 Breather Hose Installation Note)
3 Evaporative hose
(See F1–25 Evaporative Hose Installation Note)4 Fuel tank
5 Fuel-filler pipe
6 C-ring
7 Filler cap