2002 MAZDA 6 clutch

AUTOMATIC TRANSAXLE
K2–93
K2
2E———— —
2F Input/turbine speed
sensor
(GND)Input/turbine speed
sensorConstant 0•Inspect Input/turbine
speed sensor
(See K2–85 INPUT/
TURBINE SPEED
SENSOR INSPECTION)
•Inspect related harness
2G Reduction timing
solenoid valveReduction timing
solenoid valveN position 0•Inspect reduction timing
solenoid valve
(See K2–88 SOLENOID
VALVE INSPECTION)
•Inspect related harness D range B+
2H———— —
2I———— —
2J CAN L 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
2K———— —
2M CAN H 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
2N———— —
2P GND return
(solenoid ground)Solenoid valve Constant Continuity•Inspect related harness
2Q———— —
2S TCC solenoid valve
controlTCC solenoid valve D range TCC ON
(60 km/h {37 mph}
or more)B+•Inspect TCC solenoid
valve
(See K2–88 SOLENOID
VALVE INSPECTION)
•Inspect related harness TCC released (M
range, 1GR—4GR)0
2T Shift solenoid B
controlShift solenoid B N position B+•Inspect shift solenoid B
(See K2–88 SOLENOID
VALVE INSPECTION)
•Inspect related harness D range, 4GR gear 0
2U High clutch
solenoid valveHigh clutch
solenoid valveN position 0•Inspect high clutch duty
solenoid valve
(See K2–88 SOLENOID
VALVE INSPECTION)
•Inspect related harness When shifting 1-2 in
D rangeB+
2V 2-4 Brake solenoid
valve2-4 Brake duty
solenoid valveN position B+•Inspect 2-4 Brake
solenoid valve
(See K2–88 SOLENOID
VALVE INSPECTION)
•Inspect related harness D position stall 0
2W Shift solenoid A Shift solenoid A N position B+•Inspect shift solenoid A
(See K2–88 SOLENOID
VALVE INSPECTION)
•Inspect related harness D range, 3GR gear 0
2X Shift solenoid C
controlShift solenoid C N position B+•Inspect shift solenoid C
(See K2–88 SOLENOID
VALVE INSPECTION)
•Inspect related harness D range 0 Terminal Signal Connected to Test Condition Voltage (V) Action

AUTOMATIC TRANSAXLE
K2–95
K2
Pressure control solenoid signal
•TCM terminal: 2Y (+)—2P (–)
•Oscilloscope setting: 5 V/DIV (Y) 5 ms/DIV (X)
•Measuring condition: Idle after warm-up
2-4 brake solenoid valve signal
•TCM terminal: 2V (+)—2P (–)
•Oscilloscope setting: 5 V/DIV (Y) 5 ms/DIV (X)
•Measuring condition: Idle after warm-up
High clutch solenoid valve signal
•TCM terminal: 2U (+)—2P (–)
•Oscilloscope setting: 5 V/DIV (Y) 5 ms/DIV (X)
•Measuring condition: Idle after warm-up
TCC solenoid valve signal (lock up off)
•TCM terminal: 2S (+)—2P (–)
•Oscilloscope setting: 5 V/DIV (Y) 5 ms/DIV (X)
•Measuring condition: Idle after warm-up
AMU0517W060
AMU0517W060
AMU0517W060
AMU0517W058

AUTOMATIC TRANSAXLE
K2–99
K2
AUTOMATIC TRANSAXLE AND TRANSFER REMOVAL/INSTALLATIONA6E5714190902011. Disconnect the negative battery cable.
2. Remove the battery and battery tray.
3. Remove the aircleaner component. (See Sectin F.)
4. Remove the front tires and splash shield.
5. Remove the under cover.
6. Separate the steering shaft and steering hose. (See N–13 STEERING GEAR AND LINKAGE (4WD)
REMOVAL/INSTALLATION.)
7. Remove the front auto leveling sensor. (See Section T.)
8. Drain the ATF. (See K2–80 AUTOMATIC TRANSAXLE FLUID (ATF) REPLACEMENT.)
Warning
•Improperly jacking a transaxle is dangerous. It can slip off the jack and may cause serious injury.
Caution
•To prevent the torque converter and transaxle from separating, remove the transaxle without
tilting it toward the torque converter.
9. Remove in the order shown in the figure.
10. Install in the reverse order of removal.
11. Adjust the headlight zeroset. (See Section T.)
12. Add ATF to the specified level. (See K2–80 AUTOMATIC TRANSAXLE FLUID (ATF) REPLACEMENT.)
13. Carry out the mechanical system test. (See K2–72 MECHANICAL SYSTEM TEST.)
×: Test to be performed after the service work
14. Carry out the road test. (See K2–75 ROAD TEST.)
Service itemTest item
Line
pressure
testStall testTime lag
test
ATX replacement×
ATX overhaul×××
Torque converter
replacement××
Oil pump
replacement×
Clutch system
replacement××

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)

K2–142
ON-BOARD DIAGNOSTIC
End Of SieDTC P0740A6E577018901212
Diagnostic procedure
12VERIFY TROUBLESHOOTING OF DTC P0720
COMPLETED
•Make sure to reconnect all disconnected
connectors.
•Clear DTC from memory using WDS or
equivalent.
•Drive vehicle with vehicle speed 40 km/h {25
mph} or above for 2 second 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.
13VERIFY 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
DTC P0740 TCC system malfunction
DETECTION
CONDITION•RPM difference between crankshaft (engine speed signal) and reverse clutch drum (input/turbine speed
sensor signal) exceeds the pre-programmed value.
Diagnostic support note:
•This is continuous monitor (CCM).
•MIL illuminates if TCM detects the above malfunction conditions in two consecutive drive cycles.
•PENDING CODE is available.
•FREEZE FRAME DATA is available.
•AT warning light does not indication.
•DTC is stored in TCM memory.
POSSIBLE
CAUSE•ATF level low.
•Deteriorated ATF.
•TCC solenoid valve and pressure control solenoid stuck.
•Line pressure low.
•Oil pump malfunction.
•Control valve stuck
•Torque convert clutch malfunction
•TCM malfunction.
STEP INSPECTION ACTION
1VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
•Has FREEZE FRAME PID DATA been
recorded?Yes Go to next step.
No Record FREEZE FRAME PID DATA on repair order, then
go to next step.
2VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
•Check for related Service Bulletins and/or on-
line repair information availability.
•Is any related repair information available?Yes Perform repair or diagnosis according to available repair
information.
•If vehicle is not repaired, go to next step.
No Go to next step.
3CHECK ATF CONDITION
•Turn ignition key to OFF.
•Check ATF condition.
—Clear red: Normal
—Milky: Water mixed in fluid
—Reddish brown: Deteriorated ATF
•Is it okay?
(See K2–78 Automatic Transaxle Fluid (ATF)
Condition Inspection.)Yes Go to next step.
No If ATF color milky or reddish brown, replace ATF, then go to
Step 5.
(See K2–80 AUTOMATIC TRANSAXLE FLUID (ATF)
REPLACEMENT.)
4CHECK ATF LEVEL
•Start engine.
•Warm up ATX.
•Is ATF level within specification?
(See K2–79 Automatic Transaxle Fluid (ATF)
Level Inspection.)Yes Go to next step.
No Adjust ATF level, then go to Step 9.
(See K2–79 Automatic Transaxle Fluid (ATF) Level
Inspection.)

K2–144
ON-BOARD DIAGNOSTIC
DTC P0743A6E577018901213
DTC P0743 Torque converter clutch (TCC) solenoid valve circuit malfunction (open/short)
DETECTION
CONDITION•Open or short in TCC solenoid signal system (while TCM monitors solenoid output voltage, the voltage that
differs from the ON/OFF signal output by CPU in TCM is detected).
Diagnostic support note:
•This is continuous monitor (CCM).
•MIL illuminates if TCM detects the above malfunction condition during first drive cycle.
•PENDING CODE is not available.
•FREEZE FRAME DATA is available.
•AT warning light does not indication.
•DTC is stored in TCM memory.
POSSIBLE
CAUSE•Open circuit between TCC solenoid valve terminal A and TCM terminal 2S
•Short to ground between TCC solenoid valve terminal A and TCM terminal 2S
•Short to power between TCC solenoid valve terminal A and TCM terminal 2S
•TCC solenoid valve malfunction
•Damage connector between TCC solenoid valve and TCM
•TCM malfunction
2PTCM
HARNESS SIDE CONNECTORTERMINAL COMPONENT
NO.1(12-PIN)
HARNESS SIDE CONNECTOR
COUPLER COMPONENT
(10-PIN)
PART SIDE CONNECTORTCC SOLENOID VALVE
HARNESS SIDE CONNECTORAT X
CPU
CPU2S
2PB
JA C
A
B TCM
TCC SOLENOID VALVE

ON-BOARD DIAGNOSTIC
K2–175
K2
DTC P0798A6E577018901228
DTC P0798 High clutch solenoid valve circuit malfunction (open/short)
DETECTION
CONDITION•Open or short is high clutch solenoid signal system (while TCM monitors solenoid output voltage, the
voltage that differs from the ON/OFF signal output by CPU in TCM is detected).
Diagnostic support note:
•This is continuous monitor (CCM).
•MIL does not illuminate.
•PENDING CODE is not available.
•FREEZE FRAME DATA is not available.
•AT warning light indication.
•DTC is stored in TCM memory.
POSSIBLE
CAUSE•Open circuit between high clutch solenoid valve terminal A and TCM terminal 2U
•Short to ground between high clutch solenoid valve terminal A and TCM terminal 2U
•Short to power between high clutch solenoid valve terminal A and TCM terminal 2U
•high clutch solenoid valve malfunction
•Damaged connector between high clutch solenoid valve and TCM
•TCM malfunction
C
F
A
A J 2PB 2U TCM
CPU
CPUAT X
TCM
HARNESS SIDE CONNECTOR
TERMINAL COMPONENT
NO.1(12-PIN)
HARNESS SIDE CONNECTOR
COUPLER COMPONENT
(10-PIN)
PART SIDE CONNECTORHIGH CLUTCH
SOLENOID VALVE
HIGH CLUTCH SOLENOID VALVE
HARNESS SIDE CONNECTOR

K2–176
ON-BOARD DIAGNOSTIC
Diagnostic procedure
STEP INSPECTION ACTION
1VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
•Check for related Service Bulletins and/or on-
line repair information availability.
•Is any related repair information available?Yes Perform repair or diagnosis according to available repair
information.
•If vehicle is not repaired, go to next step.
No Go to next step.
2INSPECT TERMINAL COMPONENT NO.1 (12-
PIN) FOR POOR CONNECTION
•Turn ignition key to OFF.
•Disconnect terminal componentNo.1 (12-pin).
•Check for poor connection (damaged, pulled-
out, terminals, corrosion, etc.).
•Are terminals okay?Yes Go to next step.
No Repair or replace terminals, then go to Step 12.
3INSPECT RESISTANCE
•Check resistance between terminal component
No.1 (12-pin) terminal C (transaxle case side)
and body ground.
•Is resistance within 2.6—3.2 ohms?
(See K2–88 SOLENOID VALVE INSPECTION.)Yes Go to Step 8.
No Go to next step.
4INSPECT COUPLER COMPONENT (10-PIN)
FOR POOR CONNECTION
•Disconnect coupler component (10-pin)
connector.
•Check for poor connection (damaged, pulled-
out, terminals, corrosion, etc.).
•Is terminal okay?Yes Go to next step.
No Repair or replace terminal, then go to Step 12.
5INSPECT RESISTANCE
•Check resistance between coupler component
(10-pin) terminal F (part side) and body
ground.
•Is resistance within 2.6—3.2 ohms?
(See K2–88 SOLENOID VALVE INSPECTION.)Yes Repair or replace coupler component No.1 (12-pin), then
go to Step 12.
No Go to next step.
6INSPECT HIGH CLUTCH SOLENOID VALVE
CONNECTOR FOR POOR CONNECTION
•Disconnect high clutch solenoid valve
connector.
•Check for poor connection (damaged, pulled-
out, terminals, corrosion, etc.).
•Is terminal okay?Yes Go to next step.
No Repair or replace terminal, then go to Step 12.
7INSPECT RESISTANCE
•Check resistance between high clutch solenoid
valve connector terminal A (part side) and body
ground.
•Is resistance within 2.6—3.2 ohms?
(See K2–88 SOLENOID VALVE INSPECTION.)Yes Repair or replace coupler component (10-pin), then go to
Step 12.
No Verify high clutch solenoid valve installation.
•If high clutch solenoid valve is installed correctly,
replace high clutch solenoid, then go to Step 13
(See K2–90 SOLENOID VALVE REMOVAL/
INSTALLATION.)
8INSPECT TCM CONNECTOR FOR POOR
CONNECTION
•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 12.
9INSPECT TERMINAL COMPONENT NO.1 (12-
PIN) CIRCUIT FOR OPEN CIRCUIT
•Check continuity between TCM terminal 2U
(harness-side) and terminal component No.1
(12-pin) terminal C (harness-side).
•Is there continuity between terminals?Yes Go to next step.
No Repair or replace harness, then go to Step 12.
10INSPECT TERMINAL COMPONENT NO.1 (12-
PIN) CIRCUIT FOR SHORT TO POWER
•Turn ignition key to ON (engine OFF).
•Check voltage at terminal component No.1 (12-
pin) terminal C (harness-side).
•Is voltage 0 V?Yes Go to next step.
No Repair or replace harness, then go to Step 12.