Temperature control MAZDA 6 2002 Suplement Repair Manual

K2–68
AUTOMATIC TRANSAXLE
Parameter Identification (PID) Access
Monitor item table
End Of Sie
Display on the
testerDefinitionUnit/
ConditionTCM
terminal
2-4 B Duty 2-4 brake solenoid valve control signal in TCM ON/OFF 2V
BOO Brake switch ON/OFF 1U
DWN_SW Down switch ON/OFF 1S
GEAR Calculated gear range in TCM1ST/2ND/
3RD/4TH/5TH–
H/C Duty High clutch solenoid valve control signal in TCM % 2U
LPS Pressure control solenoid control signal in TCM % 2Y
MNL_SW M range switch ON/OFF 1AA
NSFT TIM Neutral shift solenoid valve control signal in TCM ON/OFF 2D
OSS Intermediate sensor rpm 1K, 1X
PNP TR switch (P/N position switch) ON/OFF–
RDCN TIM Reduction timing solenoid valve control signal in TCM ON/OFF 2G
RPM Engine speed rpm–
SSA/SS1 Shift solenoid A control signal in TCM ON/OFF–
SSB/SS2 Shift solenoid B control signal in TCM ON/OFF–
SSC/SS3 Shift solenoid C control signal in TCM ON/OFF–
TCCC TCC solenoid valve control signal in TCM % 2S
TCIL AT warning light control signal in TCM ON/OFF 1E
TFT ATF temperature°C1B, 1F
TFTV ATF temperature signal voltage V 1B, 1F
THOP Throttle position %–
TRD Tr switch (D range switch) ON/OFF 1Z
TRR TR switch (R position switch) ON/OFF 1W
TSS Input/turbine speed sensor rpm 1N, 2F
UP_SW Up switch ON/OFF 2C
VPWR Battery voltage V 1P
VSS Vehicle speed km/h 1V, 1M

LOCATION INDEX
K2–71
K2
End Of Sie
1 Automatic transaxle fluid (ATF)
(See K2–78 AUTOMATIC TRANSAXLE FLUID
(ATF) INSPECTION)
(See K2–80 AUTOMATIC TRANSAXLE FLUID
(ATF) REPLACEMENT)
2 Transaxle range (TR) switch
(See K2–80 TRANSAXLE RANGE (TR) SWITCH
INSPECTION)
(See K2–81 TRANSAXLE RANGE (TR) SWITCH
REMOVAL/INSTALLATION)
(See K2–83 TRANSAXLE RANGE (TR) SWITCH
ADJUSTMENT)
3 Transaxle fluid temperature (TFT) sensor
(See K2–84 TRANSAXLE FLUID TEMPERATURE
(TFT) SENSOR INSPECTION)
(See K2–85 TRANSAXLE FLUID TEMPERATURE
(TFT) SENSOR REMOVAL/INSTALLATION)
4 Input/turbine speed sensor
(See K2–85 INPUT/TURBINE SPEED SENSOR
INSPECTION)
(See K2–86 INPUT/TURBINE SPEED SENSOR
REMOVAL/INSTALLATION)
5 Intermediate sensor
(See K2–86 INTERMEDIATE SENSOR
INSPECTION)
(See K2–86 INTERMEDIATE SENSOR REMOVAL/
INSTALLATION)
6 Vehicle speedometer sensor (VSS)
(See K2–87 VEHICLE SPEEDOMETER SENSOR
(VSS) INSPECTION)
(See K2–87 VEHICLE SPEEDOMETER SENSOR
(VSS) REMOVAL/INSTALLATION)
7 Solenoid valve
(See K2–88 SOLENOID VALVE INSPECTION)
(See K2–90 SOLENOID VALVE REMOVAL/
INSTALLATION)
8TCM
(See K2–90 TCM INSPECTION)
(See K2–96 TCM REMOVAL/INSTALLATION)9 Transfer oil
(See K2–114 TRANSFER OIL INSPECTION)
(See K2–114 TRANSFER OIL REPLACEMENT)
10 Automatic transaxle
(See K2–99 AUTOMATIC TRANSAXLE AND
TRANSFER REMOVAL/INSTALLATION)
11 Transfer
(See K2–115 TRANSFER REMOVAL/
INSTALLATION)
(See K2–116 BREATHER PLUG REMOVAL/
INSTALLATION)
12 Oil seal
(See K2–104 OIL SEAL REMOVAL/
INSTALLATION)
13 Control valve body
(See K2–105 CONTROL VALVE BODY REMOVAL/
INSTALLATION)
14 Oil cooler
(See K2–106 OIL COOLER FLUSHING)
(See K2–108 OIL COOLER REMOVAL/
INSTALLATION)
(See K2–110 OIL COOLER DISASSEMBLY/
ASSEMBLY)
15 Drive plate
(See K2–112 DRIVE PLATE REMOVAL/
INSTALLATION)
16 Selector lever
(See K2–117 SELECTOR LEVER INSPECTION)
(See K2–117 SELECTOR LEVER COMPONENT
INSPECTION)
(See K2–119 SELECTOR LEVER REMOVAL/
INSTALLATION)
(See K2–122 SELECTOR LEVER DISASSEMBLY/
ASSEMBLY)
17 Selector cable
(See K2–118 SELECTOR CABLE ADJUSTMENT)

K2–74
AUTOMATIC TRANSAXLE
Evaluation of line pressure test
Stall Speed Test
1. Perform mechanical system test preparation. (See K2–72 Mechanical System Test Preparation.)
2. Connect a tachometer.
3. Start the engine.
4. Shift the selector lever to D range.
Caution
•Do not maintain WOT in any gear range for more than 5 seconds or transaxle damage will occur.
•If engine speed recorded by the tachometer exceeds maximum specified rpm, release the
accelerator pedal immediately. Clutch or band slippage is indicator.
5. Firmly depress the brake pedal with the left foot, and gently depress the accelerator pedal to the floor (WOT)
with the right.
6. When the engine speed no longer increases, quickly read the engine speed and release the accelerator pedal.
7. Shift the selector the to N position and let the engine idle for 1 minute or more to cool the ATF.
8. Perform stall tests for the remaining ranges and position in the same manner.
•R position
•Mrange (1GR, 2GR)
Engine stall speed
ATF temperature : 60—70 °C {140—158 °F}
Turn off all electrical loads
2,200—2,600 rpm
9. Turn off the engine.
Evaluation of stall test
Condition Possible cause
IdleBelow specificationLow pressure in all rangesWorn oil pump
Poor operation of each solenoid
Fluid leaking from oil strainer, oil pump, pressure regulator
valve, torque converter relief valve, and/or pressure relief valve
Pressure regulator valve or pilot valve sticking
Damaged pressure regulator valve spring or pilot valve spring
Low pressure in D and M
rangeFluid leaking from hydraulic circuit of low clutch
Low pressure in R position
onlyFluid leaking from hydraulic circuit of reverse clutch
Fluid leaking from hydraulic circuit of low and reverse brake
clutch
Above specification High pressure in all rangesThrottle position sensor out of adjustment
TFT sensor malfunction
Poor operation of shift solenoid
Pilot valve sticking
Pressure reducing valve or plug sticking
Stall Below specification Low pressure in all rangesThrottle position sensor out of adjustment
Pressure control solenoid malfunction
Poor operation of shift solenoid
Pilot valve sticking
Pressure reducing valve or plug sticking
Condition Possible cause
Above specificationIn all forward ranges and R
positionInsufficient line pressure
Worm oil pump
Poor operation of low clutch
Poor adjustment or malfunction of TR switch
Oil leaking from oil pump, control valve, and/or transmission
case
Pressure regulator valve or pilot valve sticking
In all forward ranges Low clutch slippage
Low one-way clutch slippage
Reduction one-way clutch slippage
In R positionLow and reverse brake slippage
Reverse clutch slippage
Reduction brake slippage
Below specificationIn all forward ranges and R
positionEngine out of tune
One-way clutch slippage within torque converter

K2–88
AUTOMATIC TRANSAXLE
SOLENOID VALVE INSPECTIONA6E571421280202Resistance Inspection (On-Vehicle)
1. Disconnect the negative battery cable.
2. Disconnect the terminal component No.1
connector.
3. Measure the resistance between the following
terminals.
•If not as specified, inspect each solenoid
valve. (See K2–89 Resistance Inspection
(Off-Vehicle).)
ATF temperature: 20 °C {68 °F}
4. Connect the terminal component No.1 connector.
5. Connect the negative battery cable.
Operating Inspection (On-Vehicle)
1. Disconnect the terminal component No.1
connector.
Caution
•Do not apply battery positive voltage to
terminals for more than three seconds.
Note
•Because the operation sound of the valves is
small, inspect in a quiet place.
2. Apply battery positive voltage to terminals A, B, C,
D, E, F, G, H, I and battery negative voltage to
GND, and verify that operating sound is heard
from solenoid.
•If the “click” is not heard, inspect the transaxle harness.
—If the transaxle harness is okay, perform the resistance inspection (off-vehicle inspection).
—If there is a problem, repair or replace the transaxle harness.
3. Connect the terminal component No.1 connector.
Terminals Solenoid valveResistance
(ohm)
A—J 2-4 brake solenoid valve 2.6—3.2
B—J TCC solenoid valve 12.0—13.2
C—J High clutch solenoid valve 2.6—3.2
D—J Pressure control solenoid 2.6—3.2
E—JReduction timing solenoid
valve14—18
F—J Shift solenoid C 14—18
G—J Shift solenoid B 14—18
H—J Neutral shift solenoid valve 14—18
I—J Shift solenoid A 14—18
TERMINAL COMPONENT No.1
A6E5714W120
A
CEG
BD
FH
IJ
K
L
A6E5714W121
TERMINAL COMPONENT No.1
A6E5714W120

AUTOMATIC TRANSAXLE
K2–91
K2
Terminal Signal Connected to Test Condition Voltage (V) Action
1A———— —
1B TFT sensor
(GND)TFT sensor Constant Continuity•Inspect TFT sensor
(See K2–84
TRANSAXLE FLUID
TEMPERATURE (TFT)
SENSOR INSPECTION)
•Inspect related harness
1C GND GND Constant Below 1.0•Inspect related harness
1D———— —
1E———— —
1F TFT sensor TFT sensor ATF temperature
20 °C {68 °F}Approx. 1.55•Inspect TFT sensor
(See K2–84
TRANSAXLE FLUID
TEMPERATURE (TFT)
SENSOR INSPECTION)
•Inspect related harness ATF temperature
60 °C {140 °F}Approx. 0.7
1G K-LINE PCM Because this
terminal is for serial
communication,
good/no good
judgment by
terminal voltage is
not possible. Carry
out inspection
according to DTCs.—•Inspect related harness
1H Cruise control
switchCruise control
switchCruise control
switch ONB+•Inspect cruise control
switch
(See section T)
•Inspect related harness Cruise control
switch OFF0
1I———— —
1J———— —
1K Intermediate sensor Intermediate sensor Vehicle stop 0•Inspect Intermediate
sensor
(See K2–86
INTERMEDIATE
SENSOR INSPECTION)
•Inspect related harness Vehicle speed at 20
km/h {12.4 mph} or
moreAbove 1.0
1M VSS VSS Vehicle stop 0•Inspect VSS
(See K2–87 VEHICLE
SPEEDOMETER
SENSOR (VSS)
INSPECTION)
•Inspect related harness Vehicle speed at 20
km/h {12.4 mph} or
moreAbove 1.0
1N Input/turbine speed
sensorInput/turbine speed
sensorVehicle stop 0•Inspect Input/turbine
speed sensor
(See K2–85 INPUT/
TURBINE SPEED
SENSOR INSPECTION)
•Inspect related harness Vehicle speed at 20
km/h {12.4 mph} or
moreAbove 1.0
AMJ5814W078

K2–126
ON-BOARD DIAGNOSTIC
DTC TABLEA6E577018901204
* : Indicates the applicable item in On-Board System Readiness Test defined by CARB.
End Of Sie
DTC No. Condition MILAT
warning
lightDC*Monitor
itemMemory
functionPage
P0705Transaxle range (TR) switch circuit malfunction
(power short circuit)XX2CCM X(See K2–127
DTC P0705)
P0706Transaxle range (TR) switch circuit malfunction
(Open/ground short circuit)XX2CCM X(See K2–129
DTC P0706)
P0711Transaxle fluid temperature (TFT) sensor
malfunction (Stuck)XNO2CCM X(See K2–132
DTC P0711)
P0712Transaxle fluid temperature (TFT) sensor circuit
malfunction (short circuit)XX2CCM X(See K2–133
DTC P0712)
P0713Transaxle fluid temperature (TFT) sensor circuit
malfunction (open circuit)XX2CCM X(See K2–135
DTC P0713)
P0715 Input/turbine speed sensor circuit malfunction X X 2 CCM X(See K2–137
DTC P0715)
P0720Vehicle speedometer sensor (VSS) circuit
malfunctionXX2CCM X(See K2–139
DTC P0720)
P0740Torque converter clutch (TCC) system
malfunctionX–2CCM X(See K2–142
DTC P0740)
P0743Torque converter clutch (TCC) solenoid valve
circuit malfunctionXX1CCM X(See K2–144
DTC P0743)
P0748 Pressure control solenoid circuit malfunction–X–CCM X(See K2–146
DTC P0748)
P0751 Shift solenoid A malfunction (stuck off) X–2CCM X(See K2–149
DTC P0751)
P0752 Shift solenoid A malfunction (stuck on) X–2CCM X(See K2–150
DTC P0752)
P0753 Shift solenoid A circuit malfunction (open/short) X X 1 CCM X(See K2–151
DTC P0753)
P0756 Shift solenoid B malfunction (stuck off) X–2CCM X(See K2–153
DTC P0756)
P0757 Shift solenoid B malfunction (stuck on) X–2CCM X(See K2–154
DTC P0757)
P0758 Shift solenoid B circuit malfunction (open/short) X X 1 CCM X(See K2–155
DTC P0758)
P0761 Shift solenoid C malfunction (stuck off) X–2CCM X(See K2–158
DTC P0761)
P0762 Shift solenoid C malfunction (stuck on) X–2CCM X(See K2–159
DTC P0762)
P0763 Shift solenoid C circuit malfunction (open/short) X X 1 CCM X(See K2–160
DTC P0763)
P0768Reduction timing solenoid valve circuit
malfunction (open/short)–X–CCM X(See K2–163
DTC P0768)
P0773Neutral shift solenoid valve circuit malfunction
(open/short)–X–CCM X(See K2–166
DTC P0773)
P07782-4 brake solenoid valve circuit malfunction
(open/short)–X–CCM X(See K2–169
DTC P0778)
P0791Intermediate sensor circuit malfunction (open/
short)XX2CCM X(See K2–172
DTC P0791)
P0798High clutch solenoid valve circuit malfunction
(open/short)–X–CCM X(See K2–175
DTC P0798)
P1710 GND return circuit malfunction–––Other X(See K2–178
DTC P1710)
U0073 CAN BUS OFF (See T–41 DTC TABLE)
U0100 TCM cannot receive any signals from PCM (See T–41 DTC TABLE)

K2–136
ON-BOARD DIAGNOSTIC
End Of Sie
4INSPECT TERMINAL COMPONENT NO.2 (8-
PIN) FOR POOR CONNECTION
•Turn ignition key to OFF.
•Inspect terminal component No.2 (8-pin)
connection.
•Disconnect terminal component No.2 (8-pin).
•Check for poor connection (damaged, pulled-
out terminals, corrosion etc.).
•Are connector and terminals okay?Yes Go to next step.
No Repair or replace connector and/or terminal, then go to
Step 11.
5INSPECT TFT SENSOR CIRCUIT
•Connect voltmeter to TCM terminal 1F.
•Turn ignition key to ON (engine OFF).
•Connect between terminal component No.2 (8-
pin) terminal H and G (harness-side) using
jumper wire.
•Verify if TCM terminal voltage changes to 0.2 V
or below.
•Does TCM terminal voltage change?Yes Go to next step.
No Go to Step 8.
6INSPECT COUPLER COMPONENT
CONNECTOR CONNECTION FOR POOR
CONNECTION
•Turn ignition key to OFF.
•Remove control valve body cover.
•Disconnect coupler component connector.
•Check for poor connection (damaged, pulled-
out terminals, corrosion, etc.).
•Are terminals okay?Yes Go to next step.
No Repair or replace connector and/or terminal, then go to
Step 11.
7INSPECT COUPLER COMPONENT CIRCUIT
FOR OPEN CIRCUIT
•Check continuity between coupler component
(8-pin) terminals I and J (part-side).
•Is there continuity?Yes Repair or replace terminal component No.2 (8-pin).
No Replace TFT sensor, then go to Step 11.
(See K2–85 TRANSAXLE FLUID TEMPERATURE (TFT)
SENSOR REMOVAL/INSTALLATION.)
8INSPECT TCM CONNECTOR FOR POOR
CONNECTION
•Turn ignition key to OFF.
•Disconnect TCM connector.
•Check for poor connection (damaged, pulled-
out terminals, corrosion, etc.).
•Are terminals okay?Yes Go to next step.
No Repair terminals, then go to Step 11.
9INSPECT HARNESS FOR OPEN CIRCUIT
•Disconnect terminal component No.2 (8-pin)
•Connect the TCM connector.
•Turn ignition key to ON (engine OFF).
•Inspect voltage at terminal component No.2 (8-
pin) terminal G (harness-side).
•Is voltage 5 V?Yes Go to next step.
No Repair or replace harness, then go to Step 11.
10INSPECT TERMINAL COMPONENT NO.2 (8-
PIN) CIRCUIT FOR OPEN CIRCUIT
•Turn ignition key to OFF.
•Check continuity between terminal component
No.2 (8-pin) terminal H (harness-side) and
body ground.
•Is there continuity?Yes Go to next step.
No Repair or replace harness, then go to next step.
11VERIFY TROUBLESHOOTING OF DTC P0713
COMPLETED
•Make sure to reconnect all disconnected
connectors.
•Clear DTC from memory using WDS or
equivalent.
•Drive vehicle for 150 seconds or more.
•Is same DTC present?Yes Replace TCM, then go to next step.
(See K2–96 TCM REMOVAL/INSTALLATION.)
No Go to next step.
12VERIFY AFTER REPAIR PROCEDURE
•Perform “After Repair Procedure”.
(See K2–124 AFTER REPAIR PROCEDURE.)
•Is there any DTC present?Yes Go to applicable DTC inspection.
No Troubleshooting completed. STEP INSPECTION ACTION

M–1
M
MFRONT AND REAR AXLES
OUTLINE............................................................... M-2
OUTLINE OF CONSTRUCTION ........................ M-2
FEATURES ......................................................... M-2
SPECIFICATIONS .............................................. M-2
REAR AXLE.......................................................... M-4
REAR AXLE OUTLINE ....................................... M-4
CROSS-SECTIONAL VIEW ............................... M-4
DRIVE SHAFT....................................................... M-5
DRIVE SHAFT OUTLINE.................................... M-5
STRUCTURAL VIEW.......................................... M-5
REAR DRIVE SHAFT ......................................... M-5
REAR DIFFERENTIAL.......................................... M-6
REAR DIFFERENTIAL OUTLINE ....................... M-6
CROSS-SECTIONAL VIEW ............................... M-6
ELECTRONIC 4WD CONTROL SYSTEM............ M-7
OUTLINE ............................................................ M-7
ELECTRONIC CONTROL COUPLING .............. M-9
DIFFERENTIAL OIL TEMPERATURE
SENSOR ........................................................ M-12
4WD WARNING LIGHT .................................... M-12
4WD CONTROL MODURE .............................. M-13
4WD SYSTEM CONTROL................................ M-14
CONTROLLER AREA NETWORK (CAN) ........ M-15
ON-BOARD DIAGNOSTIC ............................... M-16
OUTLINE............................................................. M-18
SUPPLEMENTAL SERVICE
INFORMATION .............................................. M-18
LOCATION INDEX.............................................. M-19
AXLE/DRIVE SHAFT LOCATION INDEX ......... M-19
REAR DIFFERENTIAL/ELECTRONIC
4WD CONTROL SYSTEM LOCATION
INDEX ............................................................ M-20
GENERAL PROCEDURES................................. M-21
PRECAUTION (FRONT AND REAR AXLE) ..... M-21
REAR AXLE........................................................ M-22
WHEEL HUB BOLT REPL
ACEMENT ..................................................... M-22
WHEEL HUB, KNUCKLE
REMOVAL/INSTALLATION ........................... M-22
FRONT DRIVE SHAFT........................................ M-29
JOINT SHAFT (MZR-CD (RF TURBO))
DISASSEMBLY/ASSEMBLY ......................... M-29
JOINT SHAFT (4WD)
DISASSEMBLY/ASSEMBLY ......................... M-31
FRONT DRIVE SHAFT
(MZR-CD (RF TURBO))
DISASSEMBLY/ASSEMBLY ......................... M-34
FRONT DRIVE SHAFT (4WD)
DISASSEMBLY/ASSEMBLY ......................... M-39REAR DRIVE SHAFT.......................................... M-42
REAR DRIVE SHAFT PRE-INSPECTION ........ M-42
REAR DRIVE SHAFT
REMOVAL/INSTALLATION ........................... M-43
REAR DRIVE SHAFT
DISASSEMBLY/ASSEMBLY ......................... M-45
REAR DIFFERENTIAL........................................ M-48
DIFFERENTIAL OIL INSPECTION ................... M-48
DIFFERENTIAL OIL REPLACEMENT .............. M-48
OIL SEAL (SIDE GEAR) REPLACEMENT ....... M-49
OIL SEAL (COMPANION FLANGE)
REPLACEMENT ............................................ M-49
REAR DIFFERENTIAL
REMOVAL/INSTALLATION ........................... M-51
REAR DIFFERENTIAL DISASSEMBLY ........... M-52
REAR DIFFERENTIAL ASSEMBLY ................. M-56
ELECTRONIC 4WD CONTROL SYSTEM.......... M-65
DIFFERENTIAL OIL TEMPERATURE
SENSOR INSPECTION ................................. M-65
DIFFERENTIAL OIL TEMPERATURE
SENSOR REMOVAL/INSTALLATION ........... M-65
4WD SOLENOID INSPECTION........................ M-66
4WD CONTROL MODURE INSPECTION ........ M-66
4WD CONTROL MODURE
REMOVAL/INSTALLATION ........................... M-67
COUPLING COMPONENT
REMOVAL/INSTALLATION ........................... M-68
COUPLING COMPONENT
DISASSEMBLY .............................................. M-69
COUPLING COMPONENT ASSEMBLY........... M-72
ON-BOARD DIAGNOSTIC.................................. M-75
WIRING DIAGRAM ........................................... M-75
ELECTRONIC 4WD CONTROL SYSTEM
ON-BOARD DIAGNOSIS ............................... M-76
DTC P1887 ....................................................... M-77
DTC P1888 ....................................................... M-79
DTC U0100 ....................................................... M-80
DTC U0101 ....................................................... M-80
DTC U0121 ....................................................... M-80
TROUBLESHOOTING......................................... M-81
SYSTEM WIRING DIAGRAM ........................... M-81
FOREWORD ..................................................... M-82
SYMPTOM TROUBLESHOOTING ................... M-82
NO.1 FREQUENT FRONT WHEEL SLIP ......... M-82
NO.2 TIGHT CORNER BRAKING .................... M-83
NO.3 ABNORMAL NOISE AND/OR
VIBRATION FROM COUPLING
COMPONENT ................................................ M-84 FEATURES
SERVICE

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

M–8
ELECTRONIC 4WD CONTROL SYSTEM
Components and Functions
System Diagram
.
Part name Function
Electronic control coupling
(4WD solenoid)•Based on a signal from the 4WD CM, it operates the electromagnetic clutch and
transmits drive torque to the rear wheels.
Differential oil temperature
sensor•Informs the 4WD CM of the rear differential oil temperature.
4WD CM•Controls operation of the electronic control coupling (4WD solenoid) based on signals
input from the throttle opening angle, speed, differential oil temperature and other
sensors.
•Outputs coupling control condition and 4WD warning control information as a CAN
signal.
•Controls the on-board diagnostic system and the fail-safe system if there is a malfunction
in the 4WD system.
4WD warning light•Illuminates or flashes to alert driver of a malfunction or control failure in the 4WD system.
PCM•Sends the throttle opening angle and engine speed signals, as CAN signals, to the 4WD
CM.
TCM•Sends the selector lever position and gear position signals, as CAN signals, to the 4WD
CM.
DSC HU/CM•Sends the four-wheel speed and DSC operating condition signals, as CAN signals, to the
4WD CM.
•Sends the coupling torque request signal, as a CAN signal, to the 4WD CM.
KO
P I
A
C
NH G
9
8
7
5
4
3
10
13
11
12
6
1
2
A6E63222002
1 Battery
2 Ignition switch
3 Differential oil temperature sensor
4 4WD control modure (4WD CM)
5 Electronic control coupling
6 4WD solenoid
7 Instrument cluster8 DSC HU/CM
9TCM
10 PCM
11 CAN-H
12 CAN-L
13 CAN driver