2002 MAZDA 6 Workshop Manual Suplement

F1–1
F1
F1FUEL AND EMISSION CONTROL SYSTEM
[L8, LF, L3]
OUTLINE.............................................................. F1-2
OUTLINE OF CONSTRUCTION ....................... F1-2
FEATURES ........................................................ F1-2
SPECIFICATIONS ............................................. F1-2
CONTROL SYSTEM DIAGRAM (4WD)............. F1-3
CONTROL SYSTEM WIRING DIAGRAM
(4WD).............................................................. F1-4
FUEL SYSTEM..................................................... F1-9
OUTLINE ........................................................... F1-9
STRUCTURAL VIEW......................................... F1-9
SYSTEM DIAGRAM ........................................ F1-10
FUEL PUMP (TRANSFER).............................. F1-10
QUICK RELEASE CONNECTOR (FUEL TANK
SIDE, TRANSFER HOSE PART) ................. F1-12
EXHAUST SYSTEM........................................... F1-13
OUTLINE ......................................................... F1-13
STRUCTURAL VIEW....................................... F1-13
CONTROL SYSTEM........................................... F1-14
OUTLINE ......................................................... F1-14
STRUCTURAL VIEW (4WD) ........................... F1-16
BLOCK DIAGRAM ........................................... F1-17
CONTROL DEVICE AND CONTROL
RELATIONSHIP CHART .............................. F1-19
CONTROLLER AREA NETWORK (CAN) ....... F1-21
OUTLINE............................................................ F1-22
SUPPLEMENTAL SERVICE
INFORMATION ............................................. F1-22
ENGINE TUNE-UP............................................. F1-22
IDLE SPEED INSPECTION (4WD) ................. F1-22
FUEL SYSTEM................................................... F1-23
FUEL TANK REMOVAL/INSTALLATION ........ F1-23
FUEL PUMP UNIT
REMOVAL/INSTALLATION .......................... F1-26
FUEL HOSE (FUEL TANK SIDE,
TRANSFER HOSE PART)
REMOVAL/INSTALLATION .......................... F1-29
EXHAUST SYSTEM........................................... F1-30
EXHAUST SYSTEM
REMOVAL/INSTALLATION .......................... F1-30
CONTROL SYSTEM........................................... F1-33
PCM INSPECTION (4WD)............................... F1-33
ON-BOARD DIAGNOSTIC................................. F1-50
OUTLINE ......................................................... F1-50
CONTROL DEVICE AND MONITORING
SYSTEM RELATIONSHIP CHART .............. F1-50
DIAGNOSTIC TEST MODE (4WD) ................. F1-50
DTC (4WD) ...................................................... F1-52
OBD DRIVE MODE ......................................... F1-52
DTC TABLE ..................................................... F1-54
TROUBLESHOOTING........................................ F1-57ENGINE SYMPTOM
TROUBLESHOOTING .................................. F1-57
QUICK DIAGNOSTIC CHART ......................... F1-58
NO.14 POOR FUEL ECONOMY ..................... F1-62
NO.22 VIBRATION CONCERNS
(ENGINE) ...................................................... F1-64 FEATURES
SERVICE

F1–2
OUTLINE
OUTLINE OF CONSTRUCTIONA6E390218881201•The fuel and emission control systems are essentially carried over from the current Mazda6 (GG), except for
the following features. (See Mazda6 Training Manual 3359-1*-02C.)
End Of Sie
FEATURESA6E390218881202System simplification
•Controller area network has been adopted with TCM communication (4WD).
TCM adoption
•DTC for CAN (TCM communication) has been adopted.
Modifications to match the vehicle characteristics
•The idle speed has been modified.
•Fuel pump (transfer) has been adopted.
End Of Sie
SPECIFICATIONSA6E390218881203
*1: Without the BARO sensor
*2: With the BARO sensor
Bold frames: New specifications
End Of Sie
OUTLINE
Item 2WD 4WD
Air cleaner element Type Paper element (oil permeated)
IAC valve Type Duty control
Fuel injectorType Hi-ohmic
Type of fuel delivery Top-feed
Type of drive Voltage
Pressure regulatorRegulating pressure
(kPa {kgf/cm
2, psi})440 {4.5, 64}
Fuel tankCapacity
(L {US qt, lmp qt})64 {68, 56} 62 {65, 54}
Fuel SpecificationUnleaded
(RON 90*
1/95*2 or above)Unleaded (RON 95 or above)
Catalyst Type TWC (monolythic)
EGR control Type Stepping motor type
Evaporative emission control
systemType Canister type
PCV system Type Closed type

OUTLINE
F1–3
F1
CONTROL SYSTEM DIAGRAM (4WD)A6E390218881204
.
* : Equipped for L3 engine modelEnd Of Sie
9
8
7
54
3
10
19
18
17
15
16
14
13
11
12
20
29
28
27
25
26
24
23
21
22
30
3938
3735
33
36
31
32
40
6
1
2
3441
A6E39022000
1PCM
2 Ignition coil
3 Generator
4* VAD shutter valve
5 Air cleaner
6 MAF sensor
7* VAD shutter valve actuator
8* VAD control solenoid valve
9* Vacuum chamber
10* VAD check valve (one-way)
11 IAC valve
12 Purge solenoid valve
13 TP sensor
14 MAP sensor
15* VIS control solenoid valve
16 Variable tumble control solenoid valve
17* VIS shutter valve actuator
18* VIS shutter valve
19 VTCS shutter valve actuator
20 VTCS shutter valve
21 Fuel injector22* OCV
23 CMP sensor
24 EGR valve
25 Knock sensor
26 ECT sensor
27 PCV valve
28 CKP sensor
29 HO2S (front)
30 HO2S (rear)
31 Charcoal canister
32 Check valve (two-way)
33 Pressure regulator
34 Fuel filter (high-pressure)
35 Fuel pump
36 Fuel filter (low-pressure)
37 Fuel tank
38 Rollover valve
39 Pulsation damper
40 Fuel pump (transfer)
41 To PCM

F1–4
OUTLINE
CONTROL SYSTEM WIRING DIAGRAM (4WD)A6E390218881205With Immobilizer System
.
2Y
2Z
2AC
1AB
1Y
2K
2A
1J
1G
1M
2E
1P
2H
2U
2R
2P
2S
2D
2G
2J
2M4Z
4W
4AD
4AA
4G
4J
4A
4D
2X
4O
4B
4L
4F
4Q
2T
2Q
2W
4I
9
87
5
4
3
10
19
18
17
15
16
14
13
11
12
20
29
28
27
25
26
24
23
21
22
30
6
1
2
3132
A6E39022001
1 HO2S (front)
2 HO2S (rear)
3 TP sensor
4 MAP sensor
5 BARO sensor6ECT sensor
7 MAF/IAT sensor
8 IAT sensor
9 MAF sensor
10 Controller area network (CAN)

OUTLINE
F1–5
F1
11 Knock sensor
12 CKP sensor
13 CMP sensor
14 Fuel injector No.1
15 Fuel injector No.2
16 Fuel injector No.3
17 Fuel injector No.4
18 IAC valve
19 Oxygen sensor heater (front)
20 Oxygen sensor heater (rear)
21 A/C relay22 Cooling fan relay
23 Cooling fan relay
24 Cooling fan relay
25 TR switch
26 Fuel pump relay
27 Coil
28 Security light
29 Ignition switch
30 Main relay
31 TR switch
32 Starter relay

F1–6
OUTLINE
.
1AA
1Q
1Z
1AC
1K
1C1D 4M4R 4N4K 4H4E
4T 4C4U 1AD1B 1A 2AB4X
39
38
37
35
36
33
40
45
46
44
43
41
42
34
48
47
A6E39022002
33 Generator
34 Refrigerant pressure switch (middle)
35 PSP switch
36 Blower motor
37 Refrigerant pressure switch (high and low)
38 A/C switch
39 Brake switch
40 Brake light41 Ignition coil
42 Generator
43 Purge solenoid valve
44 VAD control solenoid valve
45 EGR valve
46 Variable tumble control solenoid valve
47 VIS control solenoid valve
48 OCV

OUTLINE
F1–7
F1
Without Immobilizer system
.
2Y
2Z
2AC
1AB
1Y
2K
2A
1J
1G
1M
2E
1P
2H
2U
2R
2P
2S
2D
2G
2J
2M4Z
4W
4AD
4AA
4G
4J
4A
4D
2X
4O
4B
4L
4F
4P
9
87
5
4
3
10
19
18
17
15
16
14
13
11
12
20
25
26
24
23
21
226
1
2
28
27
A6E39022003
1 HO2S (front)
2 HO2S (rear)
3 TP sensor
4 MAP sensor
5 BARO sensor
6ECT sensor
7 MAF/IAT sensor8 IAT sensor
9 MAF sensor
10 Controller area network (CAN)
11 Knock sensor
12 CKP sensor
13 CMP sensor
14 Fuel injector No.1

F1–8
OUTLINE
.
15 Fuel injector No.2
16 Fuel injector No.3
17 Fuel injector No.4
18 IAC valve
19 Oxygen sensor heater (front)
20 Oxygen sensor heater (rear)
21 A/C relay22 Cooling fan relay
23 Cooling fan relay
24 Cooling fan relay
25 Cooling fan relay
26 Fuel pump relay
27 Ignition switch
28 Main relay
1AA
1Q
1Z
1AC
1K
1C1D 4M4R 4N4K 4H4E
4T 4C4U 1AD1B 1A 2AB4X
39
38
37
35
36
33
31
32
40
44
43
41
42
34
29
30
A6E39022004
29 Generator
30 Refrigerant pressure switch (middle)
31 PSP switch
32 Blower motor
33 Refrigerant pressure switch (high and low)
34 A/C switch
35 Brake switch
36 Brake light37 Ignition coil
38 Generator
39 Purge solenoid valve
40 VAD control solenoid valve
41 EGR valve
42 Variable tumble control solenoid valve
43 VIS control solenoid valve
44 OCV