2002 MAZDA 6 Temperature control

AUTOMATIC TRANSAXLE
K2–63
K2
Determination of Torque Converter Clutch (TCC) Cancellation
The TCC control is canceled when any of the following condition are met:
•Engine coolant temperature is low.
•ATF temperature is low.
•Brake switch is on (when depressing the brake pedal).
•Accelerator depressing speed and accelerator opening angle are above the set value.
•Engine speed signal is below the set value.
•Failure is in the TCC control system detected by diagnosis function.
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SLOPE MODE CONTROL DESCRIPTIONA6E571418901209•Climbing and the appropriate gear is determined by engine load and the vehicle acceleration.
Slope Mode Control Block Diagram
.
When climbing hill
•When the hill is steeper than a certain grade, unnecessary up shift is prevented by holding an appropriate gear.
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2C 2B
2J
2M1AA 1S 1T 1Z1W 1B 1F
2W
1M 1V2T
2X
PN
RD
M
9
8
7
543
1
2
10
18
17
15
16
14
13
11
12
6
A6E5714W022
1Starter
2 TR switch
3 Down switch
4 Up switch
5 M range switch
6 TFT sensor
7PCM
8CAN
9 Input10 Throttle position signal
Engine speed signal
Engine torque signal
11 TCM
12 Throttle opening angle
13 Shift diagram
14 Vehicle speed
15 VSS
16 Shift solenoid A
17 Shift solenoid B
18 Shift solenoid C

K2–66
AUTOMATIC TRANSAXLE
P0711Transaxle fluid temperature (TFT)
sensor malfunction (stuck)•TFT sensor signal stays
outside normal temperature
range for 10 minute or more—Available
P0712Transaxle fluid temperature (TFT)
sensor circuit malfunction (short
circuit)•Signals form TFT sensor are
155 °C {311 °F} or greater
for 10 min.
•Inhibits feedback control
•Engine coolant temperature
signal are used for shifting.Available
P0713Transaxle fluid temperature (TFT)
sensor circuit malfunction (open
circuit)•Vehicle speed is 20 km/h
{12.4 mph} or greater, and
signals from TFT sensor are
–30 °C {–22 °F} or less for
150 seconds or moreAvailable
P0715Input/turbine speed sensor circuit
malfunction•Input/turbine speed sensor
is 600 rpm or less while
engine speed is 1500 rpm or
greater and vehicle speed is
40 km/h {24.8 mph} or
greater in D ranges.•Inhibits shift control Available
P0720Vehicle speedometer sensor
circuit malfunction•Parking gear rotation
detected by VSS is 150 rpm
or less while intermediate
sensor 1400 rpm or greater
in D range for 2 second or
more.•Inhibits SLOPE mode,
feedback control, torque
reduction controlAvailable
P0740Torque converter clutch (TCC)
system•RPM difference between
crankshaft (engine speed
signal) and reverse clutch
drum (input/turbine speed
sensor signal) exceeds the
pre-programmed value—Available
P0743Torque converter clutch (TCC)
solenoid valve malfunction (open/
short)•Open or short in torque
converter clutch solenoid
valve circuit (Voltage
different from on/off signal
relayed by CPU in TCM is
detected while TCM is
monitoring solenoid output
voltage.)•Stops driving of TCC
solenoid valve (OFF)Inhibition
P0748Pressure control solenoid
malfunction (open/short)•Open or short in pressure
control solenoid circuit
(Voltage different from on/off
signal relayed by CPU in
TCM is detected while TCM
is monitoring solenoid
output voltage.)•Stops driving of pressure
control solenoid, 2-4 brake
solenoid valve, and high
clutch solenoid valve (OFF)
•Inhibit feedback control.Available
P0751Shift solenoid A malfunction
(stuck off)•Difference between actual
gear ratio and gear ratio set
in TCM is large—Available
P0752Shift solenoid A malfunction
(stuck on)•Difference between actual
gear ratio and gear ratio set
in TCM is large—Available
P0753Shift solenoid A malfunction
(open/short)•Open or short in shift
solenoid A circuit (Voltage
different from on/off signal
relayed by CPU in TCM is
detected while TCM is
monitoring solenoid output
voltage.)•Stops driving all ON/OFF
type solenoids (OFF) and
TCC solenoid valve (OFF)Inhibition
P0756Shift solenoid B malfunction
(stuck off)•Difference between actual
gear ratio and gear ratio set
in TCM is large—Available
P0757Shift solenoid B malfunction
(stuck on)•Difference between actual
gear ratio and gear ratio set
in TCM is large—Available DTC
No.On-board diagnostic function Detection condition Fail-safe TCC

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)