instrument cluster MAZDA 6 2002 Suplement Owner's Manual

M–12
ELECTRONIC 4WD CONTROL SYSTEM
DIFFERENTIAL OIL TEMPERATURE SENSORA6E632227100203Function
•The differential oil temperature sensor detects the rear differential oil temperature based on the resistance of
the thermistor, and inputs it to the 4WD control modure (4WD CM).
Construction/Operation
•The differential oil temperature sensor is installed in the rear differential carrier.
•The differential oil temperature sensor uses a thermistor whose resistance changes according to changes in
the rear differential oil temperature.
•The resistance grows smaller as the oil temperature rises and vice-versa, as shown.
.
End Of Sie
4WD WARNING LIGHTA6E632227100204Construction
•The 4WD warning light is built into the instrument cluster.
•If the self-diagnostic function stores a DTC, the warning light illuminates to alert the driver of the malfunction. If
system control is temporarily suspended due to the rear differential oil temperature becoming abnormally hot or
similar cause, the warning light flashes to alert the driver.
•The 4WD CM controls the operation of the warning light.
.
End Of Sie
5
4
3
1
2
A6E63222006
1 Differential oil temperature sensor characteristic
2 Resistance (ohm)
3 Temperature (°C {°F})4 Larger
5 Higher
1
A6E63222007
1 4WD warning light

ON-BOARD DIAGNOSTIC
M–75
M
WIRING DIAGRAMA6E637027100201
End Of Sie
ON-BOARD DIAGNOSTIC
IGNITION SWITCH
BATTERY
DIFFERENTIAL OIL
TEMPERATURE
SENSOR4WD CM4WD SOLENOID ELECTRONIC CONTROL
COUPLING
CAN DRIVERINSTRUMENT CLUSTER
CAN-H
CAN-LPCM DSC HU/CM KO
P I
A
C
NH G
TCM
A6E63702002

TROUBLESHOOTING
M–81
M
SYSTEM WIRING DIAGRAMA6E638027100201
End Of Sie
TROUBLESHOOTING
IGNITION SWITCH
BATTERY
DIFFERENTIAL OIL
TEMPERATURE
SENSOR4WD CM4WD SOLENOID ELECTRONIC CONTROL
COUPLING
CAN DRIVERINSTRUMENT CLUSTER
CAN-H
CAN-LPCM DSC HU/CM KO
P I
A
C
NH G
TCM
A6E63702002

P–4
ABS/TCS
OUTLINEA6E692146444201•The construction and operation of ABS (ABS/TCS) is the same as that of the current Mazda6 (GG) L8, LF, L3
engine 2WD model, except for the following. (See Mazda6 Training Manual 3359-1*-02C.)
—Due to adoption of TCM, ABS (ABS/TCS) HU/CM sends 4-wheel speed signal to the TCM through CAN.
Structural View
.
ABS/TCS
5
3
1
2
6
7
5
3
6
8
4
4
7
9
10TCS
OFF
11
12
A6E6916W201
1 L.H.D.
2 R.H.D.
3 ABS wheel-speed sensor (front)
4 ABS sensor rotor (front)
5 ABS wheel-speed sensor (rear)
6 ABS sensor rotor (rear)7 TCS OFF switch
8 Instrument cluster
9 ABS warning light
10 Brake system warning light
11 TCS indicator light
12 TCS OFF light

P–6
DYNAMIC STABILITY CONTROL
OUTLINEA6E692067650201•The construction and operation of DSC is the same as that of the current Mazada6 2WD model, except for the
following:
— Due to the addition the 4WD model, DSC HU/CM uses the foward-G signal from the combine sensor to
control DSC.
—Due to adoption of the 4WD CM, DSC HU/CM sends a coupling torque request, a 4-wheel speed, and DSC
operation condition signal to the 4WD CM through CAN.
—Due to the adoption of TCM, DSC HU/CM sends a 4-wheel speed signal to the TCM through CAN.
Structural view
.
DYNAMIC STABILITY CONTROL
7
5
4
3
1
2
14
13
6
13
12
5
4
3
7
6
1011
9
14
8
8
15
A6E6920T004
1 L.H.D.
2 R.H.D.
3 DSC HU/CM
4 Wheel-speed sensor (front)
5 Sensor rotor (front)
6 Wheel-speed sensor (rear)
7 Sensor rotor (rear)
8 DSC OFF switch9 Instrument cluster
10 ABS warning light
11 DSC indicator light
12 DSC OFF light
13 Steering angle sensor
14 Combine sensor
15 Brake system warning light

MULTIPLEX COMMUNICATION SYSTEM
T–3
T
OUTLINEA6E811155430201•A TCM and a 4WD control module have been adopted for the CAN system-related module.
End Of Sie
STRUCTRURAL VIEWA6E811155430202
.
End Of Sie
MULTIPLEX COMMUNICATION SYSTEM
4
1
3
2
5
A6E81111101
1 ABS (ABS/TCS) HU/CM (with ABS (ABS/TCS))
DSC HU/CM (with DSC)
2 Instrument cluster3TCM
4PCM
5 4WD control module

T–4
MULTIPLEX COMMUNICATION SYSTEM
SYSTEM WIRING DIAGRAMA6E811155430203
.
End Of SieCAN SIGNAL-CHARTA6E811155430204
OUT: Output (sends signal)
IN: Input (receives signal)
1
2
67
3
8
4
5
ROAF AG
HG
2M2J2W
2X
9
10
CAN_L
CAN_H
A6E81111102
1PCM
2 DSC HU/CM (with DSC)
3 ABS (ABS/TCS) HU/CM (with ABS (ABS/TCS))
4 Data link connector-2
5 Instrument cluster
6 TCM (JA5AX-EL)7 4WD control module (4WD)
8Twist pair
9 2R (except MZR-CD (RF Turbo))
39 (MZR-CD (RF Turbo))
10 2U (except MZR-CD (RF Turbo))
13 (MZR-CD (RF Turbo))
SignalMultiplex module
PCM TCMABS (ABS/TCS)
HU/CM or
DSC HU/CM4WD control
moduleInstrument
cluster
Accelerator pedal position
(MZR-CD (RF Turbo))OUT IN IN–IN
Air induction type OUT–IN––
ATF temperature IN OUT–––
AT warning light conditions
(JA5AX-EL)IN OUT––IN
Battery reconnection
(except MZR-CD (RF
Turbo))OUT IN–––
Brake system configuration
(EBD/ABS/TCS/DSC)IN–OUT–IN
Brake system
statusABS IN–OUT––
EBD/ABS/
TCS/DSC––OUT IN IN
Brake system warning light
conditions (brake fluid level
sensor)––IN–OUT
Country OUT–IN––
Coupling torque (with
DSC)––IN OUT–
Coupling torque request
(with DSC)––OUT IN–

MULTIPLEX COMMUNICATION SYSTEM
T–5
T
End Of Sie
Cruise main indicator light
conditions (MZR-CD (RF
Turbo))OUT–––IN
Cruise set indicator light
conditions (MZR-CD (RF
Turbo))OUT–––IN
Desired gear/
selector lever
positionFN4A-EL OUT–IN–IN
JA5AX-EL IN OUT IN IN IN
ECT OUT IN–IN
Engine control condition OUT–IN––
Engine displacement OUT–IN––
Engine loss torque (except
MZR-CD (RF Turbo))OUT IN–––
Engine speed OUT IN IN IN IN
Engine torque (except
MZR-CD (RF Turbo))OUT IN–––
Fuel injection information OUT–IN––
Fuel type and delivery OUT–IN––
Gear position IN OUT IN IN IN
Generator warning light
conditions (except MZR-
CD (RF Turbo))OUT–––IN
Glow indicator light
condition (MZR-CD (RF
Turbo))OUT–––IN
HOLD indicator light
conditions (FN4A-EL)OUT–––IN
Idle speed up request IN OUT–––
MIL condition (except
MZR-CD (RF Turbo))OUT–––IN
MIL indicate request IN OUT–––
Number of cylinders OUT–IN––
Racing select
determinationIN OUT–––
TCC condition IN OUT–––
Tire circumference (front/
rear)OUT–IN––
Torque reduction inhibit OUT IN IN––
TP OUTINININ–
Transmission/axle type OUT–IN––
Travelled distanceIN–OUT––
IN OUT––IN
OUT–––IN
Torque
reduction
requestJA5AX-EL IN OUT–––
except
JA5AX-ELIN–OUT––
Turbine speed IN OUT–––
Upper torque limit IN OUT–––
Vehicle speedOUT–––IN
IN OUT–––
Wheel speed (front left/
front right/rear left/rear
right)IN IN OUT IN–
OUT–––IN
4WD system operating
condition (warning light
information)–––OUT IN SignalMultiplex module
PCM TCMABS (ABS/TCS)
HU/CM or
DSC HU/CM4WD control
moduleInstrument
cluster

T–6
MULTIPLEX COMMUNICATION SYSTEM
ON-BOARD DIAGNOSTIC FUNCTIONA6E811155430205Outline
•The on-board diagnostic function is incorporated into the PCM, TCM, ABS (ABS/TCS) HU/CM (with ABS (ABS/
TCS)), DSC HU/CM (with DSC), 4WD control module, and instrument cluster. This function can narrow down
CAN system malfunction locations.
•Due to the adoption of the TCM and the 4WD CM, some DTCs and PID/data monitor items have been added.
Other functions are the same as those of the current Mazda6 (GG) model.
Block Diagram
.
Fail-Safe Function
•When the failure detection function detemines that there is a malfunction, the fail-safe function illuminates a
warning light to advise the driver of the malfunction.
1
3
24
5
6
A6E81111103
1PCM
2 TCM (JA5AX-EL)
3 ABS (ABS/TCS) HU/CM or DSC HU/CM4 4WD control module (4WD)
5 Instrument cluster
6Twist pair
Module Fail-safe function
PCM•MIL illuminated
TCM•AT warning light illuminated
•ABS (ABS/TCS) HU/CM (with ABS (ABS/TCS))
•DSC HU/CM (with DSC)•ABS (ABS/TCS) suspended (with ABS (ABS/TCS))
•DSC suspended (with DSC)
•ABS warning light illuminated
•DSC/TCS indicator light illuminated
•DSC OFF light illuminated
•TCS OFF light illuminated
4WD control module•4WD indicator light illuminated
Instrument cluster•Speedometer, tachometer, water temperature gauge: 0 displayed

MULTIPLEX COMMUNICATION SYSTEM
T–7
T
Self-Malfunction Diagnostic Function
•The self-malfunction diagnostic function determines that there is a malfunction, and outputs a signal, as a DTC,
to the DLC-2. The DTC can be read out using an SST (WDS or equivalent).
DTC table
PID/Data Monitoring Function
•The PID/data monitoring function is used to freely select and read out, in real time, the monitored items for the
input/output signals of the TCM, ABS (ABS/TCS) HU/CM, DSC HU/CM and instrument cluster.
•An SST (WDS or equivalent) is used to read out the PID/data monitor information.
End Of Sie
DTC Malfunction location Related module
U0073 CAN system communication error•PCM
•TCM
U0100 Communication error to PCM•TCM
•4WD control module
U0101 Communication error to TCM
•PCM
•4WD control module
U0121 Communication error to ABS (ABS/TCS) HU/CM or DSC HU/CM
U0155 Communication error to instrument cluster PCM
U1900 CAN system communication error•ABS (ABS/TCS) HU/CM (with ABS (ABS/
TCS))
•DSC HU/CM (with DSC)
•Instrument cluster
U2511 Communication error to 4WD control module•ABS (ABS/TCS) HU/CM (with ABS (ABS/
TCS))
•DSC HU/CM (with DSC)
U2516 CAN system wiring harness open and short circuit•ABS (ABS/TCS) HU/CM (with ABS (ABS/
TCS))
•DSC HU/CM (with DSC)
•Instrument cluster
PID name
(definition)Condition Specification Related module Terminal
PCM_MSG
(Missing message
from the PCM)Present Circuit in the PCM is normal•TCM
•ABS (ABS/TCS)
HU/CM or DSC
HU/CM
•Instrument cluster
•TCM: 2J, 2M
•ABS (ABS/TCS) HU/CM
(with ABS (ABS/TCS)): O,
R
•DSC HU/CM (with DSC):
AF, AG
•Instrument cluster: 2W, 2X Not Present Circuit in the PCM is abnormal
TCM_MSG
(Missing message
from the TCM)Present Circuit in the TCM is normal•ABS (ABS/TCS)
HU/CM or DSC
HU/CM
•Instrument cluster Not Present Circuit in the TCM is abnormal
ABS_MSG
(Missing message
from the ABS
(ABS/TCS) HU/
CM or DSC HU/
CM)PresentCircuit in the ABS (ABS/TCS)
HU/CM or DSC HU/CM is
normal
•TCM
•Instrument cluster
Not PresentCircuit in the ABS (ABS/TCS)
HU/CM or DSC HU/CM is
abnormal
AWD_MSG
(Missing message
from the 4WD
control module)PresentCircuit in the 4WD control
module is normal•TCM
•ABS (ABS/TCS)
HU/CM or DSC
HU/CM
•Instrument cluster Not PresentCircuit in the 4WD control
module is abnormal
IC_MSG
(Missing message
from the
instrument
cluster)PresentCircuit in the instrument cluster
is normal•TCM
•ABS (ABS/TCS)
HU/CM or DSC
HU/CM Not PresentCircuit in the instrument cluster
is abnormal