TROUBLE DIAGNOSIS — INTRODUCTION
AT-59
[EURO-OBD]
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4.oPerform all ROAD TEST and mark required procedures.AT-69, "Road
Te s t"
4-
1.Check before engine is started.AT-70, "1.
CHECK
BEFORE
ENGINE IS
STARTED"
oSELF-DIAGNOSTIC PROCEDURE/DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCE-
DURE. — Mark detected items.
oPNP switch,AT- 1 3 0 , "
DTC P0705 PARK/NEUTRAL POSITION (PNP) SWITCH".
oA/T fluid temperature sensor,AT-136, "
DTC P0710 A/T FLUID TEMPERATURE SENSOR CIR-
CUIT".
oVehicle speed sensor·A/T (Revolution sensor),AT- 1 4 2 , "
DTC P0720 VEHICLE SPEED SEN-
SOR·A/T (REVOLUTION SENSOR)".
oEngine speed signal,AT- 1 4 7 , "
DTC P0725 ENGINE SPEED SIGNAL".
oTorque converter clutch solenoid valve,AT-181, "
DTC P0740 TORQUE CONVERTER CLUTCH
SOLENOID VALVE".
oLine pressure solenoid valve,AT-186, "
DTC P0745 LINE PRESSURE SOLENOID VALVE".
oShift solenoid valve A,AT-193, "
DTC P0750 SHIFT SOLENOID VALVE A".
oShift solenoid valve B,AT-198, "
DTC P0755 SHIFT SOLENOID VALVE B".
oAccelerator pedal position (App) sensor,AT-203, "
DTC P1705 ACCELERATOR PEDAL POSITION
(APP) SENSOR".
oOverrun clutch solenoid valve,AT- 2 0 8 , "
DTCP1760OVERRUNCLUTCHSOLENOIDVALVE".
oPNP & overdrive control switches, and throttle position sensor,AT- 2 6 0 , "
21. TCM Self-diagnosis
Does Not Activate (PNP & Overdrive Control Switches, and Throttle Position Sensor Circuit Checks)"
.
oBatt/fluid temp sen (A/T fluid temperature sensor and TCM power source),AT-216, "
DTC BATT/
FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM POWER SOURCE)".
oVehicle speed sensor·MTR,AT-222, "
DTC VEHICLE SPEED SENSOR MTR".
oCAN communication line,EC-114, "
DTC U1000 CAN COMMUNICATION LINE".
oControl unit (RAM), control unit (ROM),AT- 2 2 6 , "
DTC CONTROL UNIT (RAM), CONTROL UNIT
(ROM)".
oControl unit (EEP ROM),AT- 2 2 8 , "
DTC CONTROL UNIT(EEPROM)".
oBattery
oOthers
4-
2.Check at idleAT-71, "
2.
CHECK AT
IDLE"o1. O/D OFF Indicator Lamp Does Not Come On,AT- 2 3 2 , "1. O/D OFF Indicator Lamp Does Not Come
On".
o2. Engine Cannot Be Started In “P” And “N” Position,AT- 2 3 3 , "
2. Engine Cannot Be Started In“P”and
“N”Position".
o3. In “P” Position, Vehicle Moves Forward Or Backward When Pushed,AT-234, "
3. In“P”Position, Vehi-
cle Moves Forward Or Backward When Pushed".
o4. In “N” Position, Vehicle Moves,AT- 2 3 4 , "
4. In“N”Position, Vehicle Moves".
o5. Large Shock. “N”®“R” Position,AT- 2 3 6 , "
5. Large Shock.“N”®“R”Position".
o6. Vehicle Does Not Creep Backward In “R” Position,AT- 2 3 7 , "
6. Vehicle Does Not Creep Backward In
“R”Position".
o7. Vehicle Does Not Creep Forward In “D”, “2” Or “1” Position,AT-240, "
7. Vehicle Does Not Creep For-
ward In“D”,“2”Or“1”Position".
AT-60
[EURO-OBD]
TROUBLE DIAGNOSIS — INTRODUCTION
4. 4-
3.Cruise testAT-74, "3.
CRUISE
TEST"
AT-78,
"Cruise Test
—Part 1"
Part-1
o8. Vehicle Cannot Be Started From D
1,AT- 2 4 2 , "8. Vehicle Cannot Be Started From D1".
o9. A/T Does Not Shift: D
1®D2Or Does Not Kickdown: D4®D2,AT-244, "9. A/T Does Not Shift: D1
®D2Or Does Not Kickdown: D4®D2".
o10. A/T Does Not Shift: D
2®D3,AT-246, "10. A/T Does Not Shift: D2®D3".
o11. A/T Does Not Shift: D
3®D4,AT-249, "11.A/TDoesNotShift:D3®D4".
o12. A/T Does Not Perform Lock-up,AT-252, "
12. A/T Does Not Perform Lock-up".
o13. A/T Does Not Hold Lock-up Condition,AT-253, "
13. A/T Does Not Hold Lock-up Condition".
o14. Lock-up Is Not Released,AT-254, "
14. Lock-up Is Not Released".
o15. Engine Speed Does Not Return To Idle (Light Braking D
4®D3),AT- 2 5 5 , "15. Engine Speed Does
Not Return To Idle (Light Braking D4®D3)".
Part-2AT-81,
"Cruise Test
—Part 2"o16. Vehicle Does Not Start From D1,AT-257, "16. Vehicle Does Not Start From D1".
o9. A/T Does Not Shift: D
1®D2Or Does Not Kickdown: D4®D2,AT-244, "9. A/T Does Not Shift: D1
®D2Or Does Not Kickdown: D4®D2".
o10. A/T Does Not Shift: D
2®D3,AT-246, "10. A/T Does Not Shift: D2®D3".
o11. A/T Does Not Shift: D
3®D4,AT-249, "11.A/TDoesNotShift:D3®D4".
Part-3AT-83,
"Cruise Test
—Part 3"o17. A/T Does Not Shift: D4®D3When Overdrive Control Switch “ON”®“OFF”,AT- 2 5 8 , "17. A/T Does
Not Shift: D4®D3, When Overdrive Control Switch“ON”®“OFF”".
o15. Engine Speed Does Not Return To Idle (Engine Brake In D
3),AT- 2 5 5 , "15. Engine Speed Does Not
Return To Idle (Light Braking D4®D3)".
o18. A/T Does Not Shift: D
3®22, When Selector Lever “D”®“2” Position,AT- 2 5 8 , "18. A/T Does Not
Shift: D3®22, When Selector Lever“D”®“2”Position".
o15. Engine Speed Does Not Return To Idle (Engine Brake In 2
2),AT-255, "15. Engine Speed Does Not
Return To Idle (Light Braking D4®D3)".
o19. A/T Does Not Shift: 2
2®11, When Selector Lever “2”®“1” Position,AT-259, "19. A/T Does Not
Shift: 22®11, When Selector Lever“2”®“1”Position".
o20. Vehicle Does Not Decelerate By Engine Brake,AT- 2 5 9 , "
20. Vehicle Does Not Decelerate By Engine
Brake".
o21. TCM Self-diagnosis Does Not Activate (PNP & Overdrive control switches, and throttle position sen-
sor circuit checks),AT-260, "
21. TCM Self-diagnosis Does Not Activate (PNP & Overdrive Control
Switches, and Throttle Position Sensor Circuit Checks)".
oSELF-DIAGNOSTIC PROCEDURE/DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCE-
DURE — Mark detected items.
oPNP switch,AT-130, "
DTC P0705 PARK/NEUTRAL POSITION (PNP) SWITCH".
oA/T fluid temperature sensor,AT- 1 3 6 , "
DTC P0710 A/T FLUID TEMPERATURE SENSOR CIR-
CUIT".
oVehicle speed sensor·A/T (Revolution sensor),AT-142, "
DTC P0720 VEHICLE SPEED SEN-
SOR·A/T (REVOLUTION SENSOR)".
oEngine speed signal,AT-147, "
DTC P0725 ENGINE SPEED SIGNAL".
oTorque converter clutch solenoid valve,AT- 1 8 1 , "
DTC P0740 TORQUE CONVERTER CLUTCH
SOLENOID VALVE".
oLine pressure solenoid valve,AT- 1 8 6 , "
DTC P0745 LINE PRESSURE SOLENOID VALVE".
oShift solenoid valve A,AT-193, "
DTC P0750 SHIFT SOLENOID VALVE A".
oShift solenoid valve B,AT-198, "
DTC P0755 SHIFT SOLENOID VALVE B".
oAccelerator pedal position (App) sensor,AT- 2 0 3 , "
DTC P1705 ACCELERATOR PEDAL POSITION
(APP) SENSOR".
oOverrun clutch solenoid valve,AT-208, "
DTCP1760OVERRUNCLUTCHSOLENOIDVALVE".
oPNP & overdrive control switches, and throttle position sentor,AT- 2 6 0 , "
21. TCM Self-diagnosis
Does Not Activate (PNP & Overdrive Control Switches, and Throttle Position Sensor Circuit Checks)"
.
oA/T fluid temperature sensor and TCM power source,AT- 2 1 6 , "
DTCBATT/FLUIDTEMPSEN(A/T
FLUID TEMP SENSOR CIRCUIT AND TCM POWER SOURCE)".
oVehicle speed sensor·MTR,AT- 2 2 2 , "
DTC VEHICLE SPEED SENSOR MTR".
oCAN communication line,EC-114, "
DTC U1000 CAN COMMUNICATION LINE".
oControl unit (RAM), control unit (ROM),AT- 2 2 6 , "
DTC CONTROL UNIT (RAM), CONTROL UNIT
(ROM)".
oControl unit (EEP ROM),AT-228, "
DTC CONTROL UNIT(EEPROM)".
oBattery
oOthers
TROUBLE DIAGNOSIS — INTRODUCTION
AT-63
[EURO-OBD]
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*1:AT- 5 7 , "Information from Customer"*2:AT- 5 8 , "Diagnostic Worksheet"*3:AT-7 , "ServiceNoticeorPrecau-
tions"
*4:AT- 6 4 , "A/T Fluid Check"*5:AT- 6 5 , "Stall Test"andAT- 6 8 , "Line Pressure
Te s t"
*6:AT-6 9 , "Road Test"
*7:AT- 4 1 , "CONSULT-II"*8:AT- 3 7 , "ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION"
*9:AT-5 0 , "Diagnostic Procedure
Without CONSULT-II"
*10:AT- 1 3 0 , "DTC P0705 PARK/NEU-
TRAL POSITION (PNP) SWITCH"
*11:AT- 2 2 2 , "DTC VEHICLE SPEED SENSOR
MTR"andAT-226, "DTC CONTROL UNIT
(RAM), CONTROL UNIT (ROM)"toAT- 2 2 8 ,
"DTC CONTROL UNIT(EEPROM)"
*12:AT-2 3 2 , "1. O/D OFF Indicator
Lamp Does Not Come On"
*13:AT- 2 5 9 , "20. Vehicle Does Not Decel-
erate By Engine Brake"
*14:AT- 8 6 , "Symptom Chart"*15:AT-3 9 , "HOW TO ERASE DTC"
*16:AT- 1 3 1 , "DIAGNOSTIC TROUBLE
CODE (DTC) CONFIRMATION PRO-
CEDURE"
*17:AT- 2 2 2 , "DTC VEHICLE SPEED SENSOR
MTR"andAT-226, "DTC CONTROL UNIT
(RAM), CONTROL UNIT (ROM)"toAT- 2 2 8 ,
"DTC CONTROL UNIT(EEPROM)"
*18: EC-XX
TROUBLE DIAGNOSIS — BASIC INSPECTION
AT-69
[EURO-OBD]
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5. Start engine and measure line pressure at idle and stall speed.
lWhen measuring line pressure at stall speed, follow the
stall test procedure.
Line pressure: Refer toAT-563, "
SERVICE DATA AND SPECIFI-
CATIONS (SDS)".
JUDGEMENT OF LINE PRESSURE TEST
Road TestECS004QT
DESCRIPTION
lThe purpose of the test is to determine overall performance of A/
T and analyze causes of problems.
lThe road test consists of the following three parts:
1. Check before engine is started
2. Check at idle
SAT493G
Judgement Suspected parts
At idleLine pressure is low in all positions.
lOil pump wear
lControl piston damage
lPressure regulator valve or plug sticking
lSpring for pressure regulator valve damaged
lFluid pressure leakage between oil strainer and pressure regulator valve
lClogged strainer
Line pressure is low in particular posi-
tion.
lFluid pressure leakage between manual valve and particular clutch
lFor example, line pressure is:
-Low in “R” and “1” positions, but
-Normal in “D” and “2” positions.
Therefore, fluid leakage exists at or around low and reverse brake circuit.
Refer to “CLUTCH AND BAND CHART”,AT-19, "
CLUTCH AND BAND
CHART".
Line pressure is high.
lMaladjustment of throttle position sensor
lA/T fluid temperature sensor damaged
lLine pressure solenoid valve sticking
lShort circuit of line pressure solenoid valve circuit
lPressure modifier valve sticking
lPressure regulator valve or plug sticking
lOpen in dropping resistor circuit
At stall
speedLine pressure is low.
lMaladjustment of throttle position sensor
lLine pressure solenoid valve sticking
lShort circuit of line pressure solenoid valve circuit
lPressure regulator valve or plug sticking
lPressure modifier valve sticking
lPilot valve sticking
SAT786A
AT-70
[EURO-OBD]
TROUBLE DIAGNOSIS — BASIC INSPECTION
3. Cruise test
lBefore road test, familiarize yourself with all test procedures and
items to check.
lConduct tests on all items until specified symptom is found.
Troubleshoot items which check out No Good after road test.
Refer to the following items.
1. CHECK BEFORE ENGINE IS STARTED
1.CHECK O/D OFF INDICATOR LAMP
1. Park vehicle on flat surface.
2. Turn ignition switch to “OFF” position.
3. Move selector lever to “P” position.
4. Set overdrive control switch to "ON" position.
5. Turn ignition switch to “ON” position. (Do not start engine.)
6. Does O/D OFF indicator lamp come on for about 2 seconds?
Ye s o r N o
Yes >>GOTO2
No >> Stop ROAD TEST. Go to “1. O/D OFF Indicator Lamp
Does Not Come On”,AT - 2 3 2 , "
1. O/D OFF Indicator
Lamp Does Not Come On".
ON BOARD DIAGNOSITC SYS-
TEM DESCRIPTIONTROUBLE DIAGNOSES FOR
SYMPTOMS
Except for
Euro-OBDAT- 2 6 7 , "
ON BOARD DIAG-
NOSTIC SYSTEM DESCRIP-
TION"toAT- 5 0 , "Diagnostic
Procedure Without CONSULT-
II"
AT- 2 3 2 , "1. O/D OFF Indicator
Lamp Does Not Come On"toAT-
260, "21. TCM Self-diagnosis
Does Not Activate (PNP & Over-
drive Control Switches, and
Throttle Position Sensor Circuit
Checks)"
EURO-OBDAT- 3 7 , "
ON BOARD DIAGNOS-
TIC SYSTEM DESCRIPTION"
toAT- 5 0 , "Diagnostic Procedure
Without CONSULT-II"
AT- 2 3 2 , "1. O/D OFF Indicator
Lamp Does Not Come On"toAT-
260, "21. TCM Self-diagnosis
Does Not Activate (PNP & Over-
drive Control Switches, and
Throttle Position Sensor Circuit
Checks)"
SAT496G
SAT774B
SCIA0693E
TROUBLE DIAGNOSIS — BASIC INSPECTION
AT-77
[EURO-OBD]
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14. Touch “DISPLAY”.
15. Touch “PRINT”.
16. Check the monitor data printed out.
17. Continue cruise test part 2 and 3.
Without CONSULT-II
lThrottle position sensor can be checked by voltage across termi-
nals 41 and 42 of TCM.
SAT975J
SCIA0710E
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
AT-87
[EURO-OBD]
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Transaxle noise in “P” and “N” posi-
tions.ON vehicle1. Fluid levelAT-64,
"FLUID
LEVEL
CHECK"
¬
2. Line pressure testAT-68, "
Line
Pressure
Te s t"
¬
3. Throttle position sensor (Accelerator
pedal position (App) sensor) AjustmentEC-154, "
DTC P0121 APP
SENSOR"
4. Vehicle speed sensor·A/T (Revolution
sensor) and vehicle speed sensor·MTRAT-392,
"VEHICLE
SPEED
SENSOR·A/
T(REVO-
LUTION
SENSOR)",
AT-397,
"DTC VEHI-
CLE
SPEED
SENSOR
MTR"
AT-142,
"DTC P0720
VEHICLE
SPEED
SENSOR·A/
T(REVO-
LUTION
SENSOR)",
AT-222,
"DTC VEHI-
CLE SPEED
SENSOR
MTR"
5. Engine speed signalAT-432,"ENGINE
SPEED
SIGNAL"
AT-147,
"DTC P0725
ENGINE
SPEED
SIGNAL"
OFF vehicle6. Oil pumpAT-485, "
Oil
Pump"¬
7. Torque converterAT-465,
"Locations
of Adjusting
Shims, Nee-
dle Bear-
ings, Thrust
Washers
and Snap
Rings"
¬
Vehicle moves when changing into
“P” position, or parking gear does
not disengage when shifted out of
“P” position.
AT- 2 3 4 , "
3. In“P”Position, Vehicle
Moves Forward Or Backward When
Pushed"
ON vehicle 1. Control cable adjustmentAT-456,"Control
Cable
Adjustment"
¬
OFF vehicle 2. Parking componentsAT-461,
"Compo-
nents",AT-
482,
"REPAIR
FOR COM-
PONENT
PA R T S"
¬ Symptom Condition Diagnostic ItemReference Page
Except for
Euro-OBDEURO-OBD
AT-90
[EURO-OBD]
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
Sharp shock in shifting from “N” to
“D” position.ON vehicle1. Engine idling rpmEC-XX, “Idle
Speed and
Ignition Tim-
ing”¬
2. Throttle position sensor Accelerator pedal
position (App) sensor AdjustmentEC-154, "
DTC P0121 APP
SENSOR"
3. Line pressure testAT- 6 8 , "
Line
Pressure
Te s t"
¬
4. A/T fluid temp sen circ and TCM pow sourAT- 4 2 6 ,
"BATT/
FLUID
TEMP SEN
(A/T FLUID
TEMP SEN-
SOR CIR-
CUIT AND
TCM
POWER
SOURCE)"
AT- 2 1 6 ,
"DTC BATT/
FLUID
TEMP SEN
(A/T FLUID
TEMP SEN-
SOR CIR-
CUIT AND
TCM
POWER
SOURCE)"
5. Engine speed signalAT- 4 3 2 ,"ENGINE
SPEED
SIGNAL"
AT- 1 4 7 ,
"DTC P0725
ENGINE
SPEED
SIGNAL"
6. Line pressure solenoid valveAT- 4 3 6 ,
"LINE
PRES-
SURE
SOLENOID
VA LV E"
AT- 1 8 6 ,
"DTC P0745
LINE PRES-
SURE
SOLENOID
VA LV E"
7. Control valve assemblyAT- 4 5 4 ,
"Control
Va l v e
Assembly
and Accu-
mulators"
¬
8. Accumulator N-DAT- 4 5 4 ,
"Control
Va l v e
Assembly
and Accu-
mulators"
¬
OFF vehicle 9. Forward clutchAT- 5 1 2 ,
"Forward
and Overrun
Clutches"
¬ Symptom Condition Diagnostic ItemReference Page
Except for
Euro-OBDEURO-OBD