2002 MAZDA 6 traction 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

ELECTRONIC 4WD CONTROL SYSTEM
M–7
M
OUTLINEA6E632227100201Features
Improved off-road mobility, handling stability, operability, fuel economy and marketability
•An electronic 4WD control system, which automatically optimizes traction distribution to the front and rear
wheels, has been adopted.
Improved serviceability
•A self-diagnostic function has been adopted for the electronic 4WD control system.
Electronic 4WD control system outline
•The newly adopted electronic 4WD control system automatically and optimally controls drive torque distribution
for the front and rear wheels. Due to this off-road mobility, driving stability and fuel economy are improved.
•Based on the input signals from each sensor, the 4WD control modure (4WD CM) determines vehicle driving
and road conditions, and controls output current to the electronic control coupling (4WD solenoid) inside the
rear differential. This control allows for optimal distribution of the drive torque from the engine to the rear
wheels.
•Also, the 4WD CM automatically controls the 4WD, greatly reducing the load on the driver and improving
operability.
Structural view
.
ELECTRONIC 4WD CONTROL SYSTEM
87
5
4
3
6
9
8
7
5
4
3
10
6
1
2
9
10
A6E63222001
1L.H.D.
2 R.H.D.
3 4WD warning light
4 4WD control modure
5 DSC HU/CM6PCM
7TCM
8 Electronic control coupling (4WD solenoid)
9 Differential oil temperature sensor
10 Rear differential

ELECTRONIC 4WD CONTROL SYSTEM
M–9
M
End Of SieELECTRONIC CONTROL COUPLINGA6E632227100202Outline
Features
•An electromagnetic clutch, which operates smoothly due to the lack influence from the front and rear wheel
traction force, has been adopted for the electronic control coupling system.
•The construction of the coupling enables the torque formed by the pilot clutch to be amplified by the cam
mechanism, thus allowing the main clutch to obtain a high degree of torque. Due to this, size and weight
reduction of the component parts has been achieved.
Construction
•The electronic control coupling basically consists of an electromagnetic clutch, a cam mechanism and a torque
transmission system.
•The electromagnetic clutch consists of a 4WD solenoid (electromagnetic coil), rear-housing that forms a
magnetic path, pilot clutch, and armature. The cam mechanism consists of a pilot cam, balls, and main cam.
The torque transmission system consists of a main clutch and hydraulic oil (ATF).
.
9
8
7
5
43
10
13
1112
6
12
A6E63222003
1 Front wheel side
2 Rear wheel side
3 Torque transmission system
4 Electromagnetic clutch
5 Rear housing
6 4WD solenoid (Electromagnetic coil)
7 Cam mechanism8Ball
9 Main clutch
10 Main cam
11 Armature
12 Pilot clutch
13 Pilot cam

M–10
ELECTRONIC 4WD CONTROL SYSTEM
Operation
4WD solenoid control current is OFF
•When the 4WD solenoid control current is OFF, no torque is generated in the pilot clutch because there is no
current flowing to the 4WD solenoid. At the same time, the pilot cam and the main cam rotate in the same
direction via the balls, and the main cam does not exert any push force on the main clutch side. Therefore, the
traction from the front wheels is not transmitted to the rear wheels.
.
8
7
5
4
3
6
12
56
7
A6E63222004
1 Main clutch
2 Pilot clutch
3 4WD solenoid (Electromagnetic coil)
4 4WD control modure (4WD CM)5Main cam
6Pilot cam
7Ball
8 Armature

ON-BOARD DIAGNOSTIC
P–21
P
DSC ON-BOARD DIAGNOSISA6E697067650201DTC Table
Note
•There is no change except for the code marked with an asterisk *
ON-BOARD DIAGNOSTIC
DTC
Diagnosis system component
WDS or
equivalent
B1318 DSC power supply
B1342 DSC HU/CM
B1483 Stop switch signal (with DSC only)
B1484 Stop switch signal (with DSC only)
B1486 Stop switch signal (with DSC only)
B1627 Reverse signal (with DSC only)
B2477 Module configuration (with DSC only)
C1095 Motor relay, pump motor
C1096 Motor relay, pump motor
C1119* Engine control system
C1125 Brake fluid level sensor (with DSC only)
C1140 DSC HU (pump) (with DSC only)
C1145 Right front wheel-speed sensor
C1148 Right front wheel-speed sensor/sensor rotor
C1155 Left front wheel-speed sensor
C1158 Left front wheel-speed sensor/sensor rotor
C1165 Right rear wheel-speed sensor
C1168 Right rear wheel-speed sensor/sensor rotor
C1175 Left rear wheel-speed sensor
C1178 Left rear wheel-speed sensor/sensor rotor
C1186 Fail-safe relay
C1194 Left front pressure reduction solenoid valve
C1198 Left front pressure retention solenoid valve
C1210 Right front pressure reduction solenoid valve
C1214 Right front pressure retention solenoid valve
C1233 Left front wheel-speed sensor/sensor rotor
C1234 Right front wheel-speed sensor/sensor rotor
C1235 Right rear wheel-speed sensor/sensor rotor
C1236 Left rear wheel-speed sensor/sensor rotor
C1242 Left rear pressure reduction solenoid valve
C1246 Right rear pressure reduction solenoid valve
C1250 Left rear pressure retention solenoid valve
C1254 Right rear ABS pressure retention solenoid valve
C1266 Fail-safe relay
C1280 Combine sensor (with DSC only)
C1400 Right front traction switch solenoid valve (with DSC only)
C1410 Left front traction switch solenoid valve (with DSC only)
C1414 DSC HU/CM (with DSC only)
C1507 DSC control (with DSC only)
C1508 TCS control
C1510 Right front solenoid valve, motor or wheel-speed sensor/sensor rotor
C1511 Left front solenoid valve, motor or wheel-speed sensor/sensor rotor
C1512 Right rear solenoid valve, motor or wheel-speed sensor/sensor rotor
C1513 Left rear solenoid valve, motor or wheel-speed sensor/sensor rotor

P–22
ON-BOARD DIAGNOSTIC
PID/DATA Monitor Table
Note
•There is no change except for the PID marked with an asterisk *
C1730 Combine sensor (with DSC only)
C1949* Combine sensor (with DSC only)
C1950* Combine sensor (with DSC only)
C1951 Combine sensor (with DSC only)
C1952 Combine sensor (with DSC only)
C1953 Brake fluid pressure sensor (with DSC only)
C1954 Brake fluid pressure sensor (with DSC only)
C1955 Steering angle sensor (with DSC only)
C1956 Steering angle sensor (with DSC only)
C1957 Right front DSC switch solenoid valve (with DSC only)
C1958 Left front DSC switch solenoid valve (with DSC only)
C1959 Combine sensor (with DSC only)
U1900 CAN communication
U2021 Invalid/fault data received
U2511* CAN communication
U2516 CAN communicationDTC
Diagnosis system component
WDS or
equivalent
PID Name
(Definition)Unit/Condition Condition/Specification ActionABS (ABS/
TCS) HU/CM or
DSC HU/CM
terminal
RPM
(Engine speed signal input)RPM•Engine is stopped: 0 RPM
•Engine is running: Indicates
engine speedInspect PCM.—
TRANSGR
*
(with DSC only)
(Transaxle gear position)FN4A-EL:
R/N/D/S/L
JA5AX-EL:
R/N/D•Selector lever position is
displayed
—R: R
—N: N
—D: D
—S: SInspect PCM, TR
switch, or DSC HU/
CM.
—
TRAC_SW
(TCS OFF switch input)ON/OFF•TCS (DSC) OFF switch is
depressed: ON
•TCS (DSC) OFF switch is
released: OFFInspect TCS (DSC)
OFF switch.
AA
TC LVAL (with DSC only)
(Traction switch solenoid valve
(LF-RR))ON/OFF•Solenoid valve is activated:
ON
•Solenoid valve is
deactivated: OFFInternal fault of DSC
HU/CM. Replace DSC
HU/CM.—
TC RVAL (with DSC only)
(Traction switch solenoid valve
(RF-LR))ON/OFF•Solenoid valve is activated:
ON
•Solenoid valve is
deactivated: OFFInternal fault of DSC
HU/CM. Replace DSC
HU/CM.—
L_DSC O (with DSC only)
(Stability control solenoid
valve (LF-RR))ON/OFF•Solenoid valve is activated:
ON
•Solenoid valve is
deactivated: OFFInternal fault of DSC
HU/CM. Replace DSC
HU/CM.—
R_DSC O (with DSC only)
(Stability control solenoid
valve (RF-LR))ON/OFF•Solenoid valve is activated:
ON
•Solenoid valve is
deactivated: OFFInternal fault of DSC
HU/CM. Replace DSC
HU/CM.—
CCNTABS
(Number of continuous codes)—DTC is detected: 1—255
DTC is not detected: 0Perform inspection
using appropriate
DTC.—