2002 MAZDA 6 turn signal

ON-BOARD DIAGNOSTIC
K2–133
K2
DTC P0712A6E577018901208
Diagnostic procedure
DTC P0712 Transaxle fluid temperature (TFT) sensor circuit malfunction (short to ground)
DETECTION
CONDITION•Signal from TFT sensor is 0.088 V or less for 20 seconds or more.
Diagnostic support note:
•This is a 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 indication.
•DTC is stored in TCM memory.
POSSIBLE
CAUSE•TFT sensor malfunction.
•Open circuit between TFT sensor and TCM terminal 1F
•Open circuit between TFT sensor and TCM terminal 1B
•Damaged connectors between TFT sensor and TCM
•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.
3VERIFY CURRENT INPUT SIGNAL STATUS - IS
CONCERN INTERMITTENT OR CONSTANT?
•Turn ignition key to OFF.
•Connect voltmeter to TCM terminal 1F.
•Turn ignition key to ON (engine OFF).
•Are TCM terminal voltage within 0.2—4.9 V?Yes Go to intermittent concern troubleshooting procedure.
(See section F1.)
No Go to next step.
AT XTCM
IG1F
1B
JH
TFT SENSOR
TCM
HARNESS SIDE CONNECTORTERMINAL COMPONENT NO.2(8-PIN)
HARNESS SIDE CONNECTOR
COUPLER COMPONENT NO.2(8-PIN)
PART SIDE CONNECTOR

ON-BOARD DIAGNOSTIC
K2–135
K2
DTC P0713A6E577018901209
Diagnostic procedure
DTC P0713 Transaxle fluid temperature (TFT) sensor circuit malfunction (open circuit)
DETECTION
CONDITION•Vehicle speed is 20 km/h {12.4 mph} or greater, and signal from TFT sensor is 2.4 V or above for 300
seconds or more.
Diagnostic support note:
•This is a 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 indication.
•DTC is stored in TCM memory.
POSSIBLE
CAUSE•TFT sensor malfunction.
•Open circuit between TFT sensor and TCM terminal 1F
•Open circuit between TFT sensor and TCM terminal 1B
•Damaged connectors between TFT sensor and TCM
•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.
3VERIFY CURRENT INPUT SIGNAL STATUS - IS
CONCERN INTERMITTENT OR CONSTANT?
•Turn ignition key to OFF.
•Connect voltmeter to TCM terminal 1F
•Turn ignition key to ON (engine OFF).
•Are TCM terminal voltage within 0.2—4.9 V?Yes Go to intermittent concern troubleshooting procedure.
(See section F1.)
No Go to next step.
AT XTCM
IG1F
1B
JH
TFT SENSOR
TCM
HARNESS SIDE CONNECTORTERMINAL COMPONENT NO.2(8-PIN)
HARNESS SIDE CONNECTOR
COUPLER COMPONENT NO.2(8-PIN)
PART SIDE CONNECTOR

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.)

K2–146
ON-BOARD DIAGNOSTIC
End Of SieDTC P0748A6E577018901214
11INSPECT 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 H (harness-side).
•Is voltage 0 V?Yes Go to next step.
No Repair or replace harness, then go to Step 13.
12INSPECT TCM CIRCUIT FOR SHORT TO
GROUND
•Turn ignition key to OFF.
•Check continuity between TCM terminal 2S
(harness-side) and body ground.
•Is there any continuity?Yes Repair or replace harness, then go to next step.
No Go to next step.
13VERIFY TROUBLESHOOTING OF DTC P0743
COMPLETED
•Make sure to reconnect all disconnected
connectors.
•Clear DTC from memory using WDS or
equivalent.
•Drive vehicle in D range and make sure that
gears shift smoothly from 1GR to 5GR.
•Is same DTC present?Yes Replace TCM, then go to next step.
(See K2–96 TCM REMOVAL/INSTALLATION.)
No Go to next step.
14VERIFY 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 P0748 Pressure control solenoid circuit malfunction (open/short)
DETECTION
CONDITION•Open or short in pressure control 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 a 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 pressure control solenoid terminal A and TCM terminal 2Y
•Short to ground between pressure control solenoid terminal A and TCM terminal 2Y
•Short to power between pressure control solenoid terminal A and TCM terminal 2Y
•Pressure control solenoid malfunction
•Damaged connector between pressure control solenoid valve and TCM
•TCM malfunction

K2–178
ON-BOARD DIAGNOSTIC
DTC P1710A6E577018901229
DTC P1710 GND return circuit malfunction
DETECTION
CONDITION•TCM detects open circuit in GND return signal line from solenoid valve.
Diagnostic support note:
•This is a diagnostic support DTC (monitored one per key cycle).
•MIL does not illuminate.
•PENDING CODE is not available.
•FREEZE FRAME DATA is not available.
•AT warning light does not indication.
•DTC is stored in TCM memory.
POSSIBLE
CAUSE•Open circuit between duty type solenoid valves terminal and TCM terminal 2P
•Damaged connector between solenoid valve and TCM
•TCM malfunction
A J 2PB TCM
CPU
CPUAT X
TCM
HARNESS SIDE CONNECTOR TERMINAL COMPONENT
NO.1(12-PIN)
HARNESS SIDE CONNECTOR
COUPLER COMPONENT
(10-PIN)
PART SIDE CONNECTORSOLENOID VALVE
SOLENOID VALVE
HARNESS SIDE CONNECTOR

K2–180
ON-BOARD DIAGNOSTIC
End Of SiePID/DATA MONITOR INSPECTIONA6E5770189012301. Connect the SSTs (WDS or equivalent) to the DLC-2.
2. Turn the ignition switch to ON.
3. Measure the PID value.
Note
•Perform part inspection for the output device after TCM inspection.
•The PID/DATA MONITOR function monitors the calculated value of the input/output signals in the TCM.
Therefore, if a monitored value of an output device is out of specification, it is necessary to inspect the
monitored value of the input device related to the output device control. Since an output device
malfunction is not directly indicated as a malfunction of the monitored value for the output device, it is
necessary to inspect the output device individually using the simulation function, etc.
PID/DATA MONITOR AND RECORD function table
10VERIFY 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
Monitor item
(Definition)Unit/
ConditionCondition/Specification ActionTCM
terminal
2-4 B Duty
(2-4 brake
solenoid vale)ON/OFFN position: ON
M range (1GR) stall: OFFInspect 2-4 brake solenoid valve.
(See K2–88 SOLENOID VALVE
INSPECTION.)2V
BOO
(Brake switch)ON/OFFBrake pedal depressed: ON
Other: OFFInspect brake switch.
1U
DWN_SW
(Down switch)ON/OFFDown sift at M range: ON
Other: OFFInspect selector lever component.
1S
GEAR
(Calculated
gear range in
TCM)1ST/2ND/
3RD/4TH/
5TH1GR: 1ST
2GR: 2ND
3GR: 3RD
4GR: 4TH
5GR: 5THInspect following PIDs: THOP, TSS
–
H/C Duty
(High clutch
solenoid valve)%N position: OFF
D range 1GR to 2GR shifting: ONInspect high clutch solenoid valve.
(See K2–88 SOLENOID VALVE
INSPECTION.)2U
LPS
(Pressure
control
solenoid)%Ignition switch ON: 0%
Idle: 0—100%Inspect pressure control solenoid.
(See K2–88 SOLENOID VALVE
INSPECTION.)2Y
MNL_SW
(M range
switch)ON/OFFM range: ON
Other: OFFInspect selector lever component.
1AA
NSFT TIM
(Neutral shift
solenoid valve)ON/OFFN position: OFF
R position inhibition control: ONInspect main relay.
(See T–19 RELAY INSPECTION.)
Inspect battery.
(See G–6 BATTERY INSPECTION.)2D
OSS
(Intermediate
sensorrpmIgnition switch ON: 0 rpm
Idle: 700—800 rpmInspect intermediate sensor.
(See K2–86 INTERMEDIATE SENSOR
INSPECTION.)1K, 1X
PNP
(TR switch (P/
N position
switch))ON/OFFP or N position: ON
R position and all ranges: OFFInspect TR switch.
(See K2–88 SOLENOID VALVE
INSPECTION.)–
RDCN TIM
(Reduction
timing solenoid
valve)ON/OFFN position: OFF
D range: ONInspect reduction timing solenoid valve.
(See K2–88 SOLENOID VALVE
INSPECTION.)2G
RPM
(Engine speed)rpmIgnition switch ON: 0 rpm
Idle: 700—800 rpmInspect TCM.
(See K2–90 TCM INSPECTION.)–
SSA/SS1
(Shift solenoid
A)ON/OFFN position: ON
D range 3GR: OFFInspect shift solenoid A.
(See K2–88 SOLENOID VALVE
INSPECTION.)–

K2–186
TROUBLESHOOTING
CAN signal
Vehicle dose not move in D range, or in R position
X
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X
X X
X
XX
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X
X
X
XX
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X XX XX
X
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X XXXX
XXXX
XXXXX XX XXX
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X
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XXX
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XX X X
X 1
Excessive creep 4
No creep at all 5
Low maximum speed and poor acceleration 6
No shifting 7
Does not shift to fifth gear (5GR) 8
Abnormal shifting 9
Frequent shifting 10
Shift point is high or low 11
Torque converter clutch (TCC) non-operation 12
No kickdown 13
Engine flares up or slips when upshifting or downshifting 14
Engine flares up or slip when accelerating vehicle 15
Judder upon torque converter clutch (TCC) operation 16
Excessive shift shock from N to D or N to R position/range 17
Excessive shift shock on torque converter clutch (TCC) 19
No engine braking in 1GR position of M range 22
Transaxle overheats 23
Engine stalls when shifted to D range, or in R position 24
Engine stalls when driving at slow speeds or stopping 25
Starter does not work 26Excessive shift shock is given when upshifting and
downshifting 18
Noise occurs at idle when vehicle is stopped in all
positions/ranges 20
Noise occurs at idle when vehicle is stopped in D
range, or in R position 21
Gear position indicator light illuminates in D range or P, N,
R positions 28Gear position indicator light does not illuminate in M range
Electrical system components
ATX inner parts
ATX outer parts
Hydraulic system
components
Control valve body 27
Does not shift up in M range
29
Does not shift down in M rangeSymptom item
Cause of trouble
Open/short
Malfunction signal is inputed Signal is inputed
Open/short
Open/short Open/short
Open/short
Open/short
Open/short
Open/short
Open/short Open/short
Open/short
Open/short Open/short
Control valve spool is not operating properly ATF amount
2-4 brake accumulator is not operating properly Low clutch solenoid accumulator is not operating properly
Direct clutch accumulator is not operating properly High clutch accumulator is not operating properly2-4 brake solenoid valve Pressure control solenoid
TCC solenoid valve
High clutch solenoid valve TFT sensor N-D select
Transaxle range switch
Power supply, GND
Shift solenoid A
Shift solenoid B
Shift solenoid C
Neutral shift solenoid valve
Reducation timing solenoid
GND return line
30Vehicle moves in N position 2
Vehicle moves in P position, or parking gear does not
disengage when P is disengaged 3
A6E5780W002

K2–190
TROUBLESHOOTING
Diagnostic procedure
End Of SieNO.6 LOW MAXIMUM SPEED AND POOR ACCELERATIONA6E578001030209
Diagnostic procedure
STEP INSPECTION ACTION
1•Does vehicle creep in P and/or N position? Yes Inspect or adjust the selector lever.
(See K2–117 SELECTOR LEVER INSPECTION.)
(See K2–118 SELECTOR CABLE ADJUSTMENT.)
No Go to next step.
2•Stop engine.
•Inspect pressure control solenoid circuit.
•Is it okay?Yes Go to next step.
No•Inspect for pressure control solenoid mechanical stuck.
(See K2–88 SOLENOID VALVE INSPECTION.)
—If pressure control solenoid okay, inspect for open or
short circuit between TCM connector terminal 2Y and
pressure control solenoid connector terminal D.
3•Remove torque converter.
•Inspect torque converter.
(See ATX Workshop Manual.)
•Is torque converter okay?Yes•Overhaul control valve body and repair or replace any
defective parts.
(See ATX Workshop Manual.)
—If problem remains, replace or overhaul transaxle and
repair or replace any defective parts.
(See K2–99 AUTOMATIC TRANSAXLE AND
TRANSFER REMOVAL/INSTALLATION.)
(See ATX Workshop Manual.)
No Replace torque converter.
4•Verify test results.
—If okay, return to diagnostic index to service any additional symptoms.
—If malfunction remains, inspect related Service Informations and perform repair or diagnosis.
—If vehicle repaired, troubleshooting completed.
—If vehicle not repaired or additional diagnostic information not available, replace TCM.
6 Low maximum speed and poor acceleration
DESCRIPTION•Vehicle acceleration poor at start.
•Delayed acceleration when accelerator pedal depressed while driving.
POSSIBLE
CAUSE•If clutch is stuck or does not stay in 4GR, malfunction is in engine circuit.
—Clutch slipped, burned
•Line pressure low
•Incorrect throttle position signal
•Malfunction of VSS
•Malfunction of input/turbine speed sensor
•Malfunction of sensor ground
•Malfunction of shift solenoids A, B, or C
•Malfunction of body ground
•Malfunction of control valve body
—Transaxle fixed in 4GR (Operation of fail-safe function)
•Short or open circuit in wiring
•Poor connection of connector
•Electronic parts of output and input system malfunction are malfunctioning
—Insufficient starting torque (Suspected when in-gear condition, shift control and engine circuit are
normal)
•Malfunction of torque converter (Poor operation, sticking)
—Engagement of TCC operation range (Operation of fail-safe function)
•Malfunction of TFT sensor (Short or open circuit)
Note
•Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic
and Automatic Transaxle Basic Inspection are conducted.
STEP INSPECTION ACTION
1•With ignition switch at ON, does gear
position indicator light indication correspond
to selector lever position?Yes Go to next step.
No Go to symptom troubleshooting No.27 “Gear position
indicator light does not illuminate in M range”, or No.28
“Gear position indicator light illuminates in D range or P, N,
R position”.
2•Go to symptom troubleshooting No.12 “Lack/
loss of power-acceleration/cruise”.
(See Section F.)
•Does engine control system okay?Yes Go to next step.
No Repair or replace any defective parts according to
inspection results.