2002 MAZDA 6 instrument cluster

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.
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STRUCTRURAL VIEWA6E811155430202
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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
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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
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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
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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.
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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

WARNING AND INDEICATOR SYSTEM, THEFT-DETERRENT SYSTEM
T–11
T
SYSTEM WIRING DIAGRAMA6E811801069203
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OUTLINEA6E812050000201•An intruder sensor has been adopted on the rear part of the roof. (WGN)
•The construction and operation of the theft-deterrent system is the same as that of the current Mazda6 (GG)
model.
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INTRUDER SENSORA6E812050000202Outline
•WGN models are equipped with intruder sensors in two places in the vehicle, due to the necessity of movement
detection in the all around wider vehicle interior. The intruder sensors are located in the roof at the front (with
sliding sunroof), or the center (without sliding sunroof), and the cargo space.
•The structure and operation of the rear intruder sensor is the same as that of the current front and center
intruder sensors.
IG1
B+
1
345
2
6
97
8
2H 2V
1C 2F 2D 2M 2X 2W
A6E81181004
1 Instrument cluster
2Microcomputer
3 Glow indicator light
4 Sedimentor warning light
5 4WD indicator light6 PCM, ABS (ABS/TCS) HU/CM or DSC HU/CM
7 Fuel gauge sender sub-unit (4WD)
8 Fuel gauge sender unit
9 Sedimentor switch
THEFT-DETERRENT SYSTEM

ON-BOARD DIAGNOSTIC [MULTIPLEX COMMUNICATION SYSTEM]
T–39
T
MULTIPLEX COMMUNICATION SYSTEMA6E816255430201Outline
•If the controller area network (CAN) system is malfunctioning, read the DTCs of the following modules, using
the SST (WDS or equivalent) to determine the malfunctioning system.
—PCM
—TCM
—ABS (ABS/TCS) HU/CM (with ABS (ABS/TCS))
—DSC HU/CM (with DSC)
—4WD control module
—Instrument cluster
ON-BOARD DIAGNOSTIC [MULTIPLEX COMMUNICATION SYSTEM]