Diagnostic Worksheet=NJAT0023S0102
1.NRead the Fail-safe and listen to customer complaints. AT-9
2.NCHECK A/T FLUIDAT-78
NLeakage (Follow specified procedure)
NFluid condition
NFluid level
3.NPerform STALL TEST and LINE PRESSURE TEST. AT-78, 82
NStall test Ð Mark possible damaged components/others.
NTorque converter one-way clutch
NReverse clutch
NForward clutch
NOverrun clutch
NForward one-way clutchNLow & reverse brake
NLow one-way clutch
NEngine
NLine pressure is low
NClutches and brakes except high clutch
and brake band are OK
NLine Pressure test Ð Suspected parts:
4.NPerform all ROAD TEST and mark required procedures. AT-83
4-1. Check before engine is started. AT-85
NSELF-DIAGNOSTIC PROCEDURE Ð Mark detected items.
NVehicle speed sensor´A/T (Revolution sensor), AT-124.
NVehicle speed sensor´MTR, AT-129.
NThrottle position sensor, AT-132.
NShift solenoid valve A, AT-140.
NShift solenoid valve B, AT-146.
NOverrun clutch solenoid valve, AT-152.
NTorque converter clutch solenoid valve, AT-157.
NA/T fluid temperature sensor and TCM power source, AT-163.
NEngine speed signal, AT-170.
NLine pressure solenoid valve, AT-174.
NControl unit (RAM), control unit (ROM), AT-282.
NControl unit (EEP ROM), AT-284.
NPNP, overdrive control and throttle position switches, AT-326.
NBattery
NOthers
4-2. Check at idleAT-87
N1. O/D OFF Indicator Lamp Does Not Come On, AT-288.
N2. Engine Cannot Be Started In ªPº And ªNº Position, AT-291.
N3. In ªPº Position, Vehicle Moves Forward Or Backward When Pushed, AT-292.
N4. In ªNº Position, Vehicle Moves, AT-293.
N5. Large Shock. ªNº®ªRº Position, AT-295.
N6. Vehicle Does Not Creep Backward In ªRº Position, AT-297.
N7. Vehicle Does Not Creep Forward In ªDº, ª2º Or ª1º Position, AT-300.
TROUBLE DIAGNOSIS Ð
INTRODUCTION
EXCEPT FOR EURO-OBD
Introduction (Cont'd)
AT-69
4. 4-3. Cruise testAT-90
AT-93
Part-1
N8. Vehicle Cannot Be Started From D
1, AT-303.
N9. A/T Does Not Shift: D
1®D2Or Does Not Kickdown: D4®D2, AT-306.
N10. A/T Does Not Shift: D
2®D3, AT-309.
N11. A/T Does Not Shift: D
3®D4, AT-312.
N12. A/T Does Not Perform Lock-up, AT-315.
N13. A/T Does Not Hold Lock-up Condition, AT-317.
N14. Lock-up Is Not Released, AT-319.
N15. Engine Speed Does Not Return To Idle (Light Braking D
4®D3), AT-320.
Part-2AT-97
N16. Vehicle Does Not Start From D
1, AT-322.
N9. A/T Does Not Shift: D
1®D2Or Does Not Kickdown: D4®D2, AT-306.
N10. A/T Does Not Shift: D
2®D3, AT-309.
N11. A/T Does Not Shift: D
3®D4, AT-312.
Part-3AT-99
N17. A/T Does Not Shift: D
4®D3When Overdrive Control Switch ªONº®ªOFFº, AT-323
N15. Engine Speed Does Not Return To Idle (Engine Brake In D
3), AT-320.
N18. A/T Does Not Shift: D
3®22, When Selector Lever ªDº®ª2º Position, AT-324.
N15. Engine Speed Does Not Return To Idle (Engine Brake In 2
2), AT-320.
N19. A/T Does Not Shift: 2
2®11, When Selector Lever ª2º®ª1º Position, AT-325.
N20. Vehicle Does Not Decelerate By Engine Brake, AT-326.
N21. TCM Self-diagnosis Does Not Activate (PNP, Overdrive Control and Throttle Position Switches
Circuit Checks), AT-326.
NSELF-DIAGNOSTIC PROCEDURE Ð Mark detected items.
NVehicle speed sensor´A/T (Revolution sensor), AT-124.
NVehicle speed sensor´MTR, AT-129.
NThrottle position sensor, AT-132.
NShift solenoid valve A, AT-140.
NShift solenoid valve B, AT-146.
NOverrun clutch solenoid valve, AT-152.
NTorque converter clutch solenoid valve, AT-157.
NA/T fluid temperature sensor and TCM power source, AT-163.
NEngine speed signal, AT-170.
NLine pressure solenoid valve, AT-174.
NControl unit (RAM), control unit (ROM), AT-282.
NControl unit (EEP ROM), AT-284.
NPNP, overdrive control and throttle position switches, AT-326.
NBattery
NOthers
5.NFor self-diagnosis NG items, inspect each component. Repair or replace the damaged parts. AT-38
6.NPerform all ROAD TEST and re-mark required procedures. AT-83
7.NPerform the Diagnostic Procedures for all remaining items marked NG. Repair or replace the damaged
parts.
Refer to the Symptom Chart when you perform the procedures. (The chart also shows some other possible
symptoms and the component inspection orders.)AT-116
AT-103
8.NErase self-diagnosis code from TCM memories. AT-41
AT-47
TROUBLE DIAGNOSIS Ð
INTRODUCTION
EXCEPT FOR EURO-OBD
Introduction (Cont'd)
AT-70
Diagnostic Worksheet=NJAT0257S0102
1.NRead the Fail-safe and listen to customer complaints. AT-9
2.NCHECK A/T FLUIDAT-78
NLeakage (Follow specified procedure)
NFluid condition
NFluid level
3.NPerform STALL TEST and LINE PRESSURE TEST. AT-78, 82
NStall test Ð Mark possible damaged components/others.
NTorque converter one-way clutch
NReverse clutch
NForward clutch
NOverrun clutch
NForward one-way clutchNLow & reverse brake
NLow one-way clutch
NEngine
NLine pressure is low
NClutches and brakes except high clutch and
brake band are OK
NLine Pressure test Ð Suspected parts:
4.NPerform all ROAD TEST and mark required procedures. AT-83
4-1. Check before engine is started. AT-85
NSELF-DIAGNOSTIC PROCEDURE Ð Mark detected items.
NPNP switch, AT-181.
NA/T fluid temperature sensor, AT-187.
NVehicle speed sensor´A/T (Revolution sensor), AT-193.
NEngine speed signal, AT-198.
NTorque converter clutch solenoid valve, AT-231.
NLine pressure solenoid valve, AT-237.
NShift solenoid valve A, AT-244.
NShift solenoid valve B, AT-250.
NThrottle position sensor, AT-256.
NOverrun clutch solenoid valve, AT-265.
NPNP, overdrive control and throttle position switches, AT-326.
NA/T fluid temperature sensor and TCM power source, AT-271.
NVehicle speed sensor´MTR, AT-278.
NControl unit (RAM), control unit (ROM), AT-282.
NControl unit (EEP ROM), AT-284.
NBattery
NOthers
4-2. Check at idleAT-87
N1. O/D OFF Indicator Lamp Does Not Come On, AT-288.
N2. Engine Cannot Be Started In ªPº And ªNº Position, AT-291.
N3. In ªPº Position, Vehicle Moves Forward Or Backward When Pushed, AT-292.
N4. In ªNº Position, Vehicle Moves, AT-293.
N5. Large Shock. ªNº®ªRº Position, AT-295.
N6. Vehicle Does Not Creep Backward In ªRº Position, AT-297.
N7. Vehicle Does Not Creep Forward In ªDº, ª2º Or ª1º Position, AT-300.
TROUBLE DIAGNOSIS Ð INTRODUCTIONEURO-OBD
Introduction (Cont'd)
AT-74
4. 4-3. Cruise testAT-90
AT-93
Part-1
N8. Vehicle Cannot Be Started From D
1, AT-303.
N9. A/T Does Not Shift: D
1®D2Or Does Not Kickdown: D4®D2, AT-306.
N10. A/T Does Not Shift: D
2®D3, AT-309.
N11. A/T Does Not Shift: D
3®D4, AT-312.
N12. A/T Does Not Perform Lock-up, AT-315.
N13. A/T Does Not Hold Lock-up Condition, AT-317.
N14. Lock-up Is Not Released, AT-319.
N15. Engine Speed Does Not Return To Idle (Light Braking D
4®D3), AT-320.
Part-2AT-97
N16. Vehicle Does Not Start From D
1, AT-322.
N9. A/T Does Not Shift: D
1®D2Or Does Not Kickdown: D4®D2, AT-306.
N10. A/T Does Not Shift: D
2®D3, AT-309.
N11. A/T Does Not Shift: D
3®D4, AT-312.
Part-3AT-99
N17. A/T Does Not Shift: D
4®D3When Overdrive Control Switch ªONº®ªOFFº, AT-323
N15. Engine Speed Does Not Return To Idle (Engine Brake In D
3), AT-320.
N18. A/T Does Not Shift: D
3®22, When Selector Lever ªDº®ª2º Position, AT-324.
N15. Engine Speed Does Not Return To Idle (Engine Brake In 2
2), AT-320.
N19. A/T Does Not Shift: 2
2®11, When Selector Lever ª2º®ª1º Position, AT-325.
N20. Vehicle Does Not Decelerate By Engine Brake, AT-326.
NSELF-DIAGNOSTIC PROCEDURE Ð Mark detected items.
NPNP switch, AT-181.
NA/T fluid temperature sensor, AT-187.
NVehicle speed sensor´A/T (Revolution sensor), AT-193.
NEngine speed signal, AT-198.
NTorque converter clutch solenoid valve, AT-231.
NLine pressure solenoid valve, AT-237.
NShift solenoid valve A, AT-244.
NShift solenoid valve B, AT-250.
NThrottle position sensor, AT-256.
NOverrun clutch solenoid valve, AT-265.
NPNP, overdrive control and throttle position switches, AT-326.
NA/T fluid temperature sensor and TCM power source, AT-271.
NVehicle speed sensor´MTR, AT-278.
NControl unit (RAM), control unit (ROM), AT-282.
NControl unit (EEP ROM), AT-284.
NBattery
NOthers
5.NFor self-diagnosis NG items, inspect each component. Repair or replace the damaged parts. AT-53
6.NPerform all ROAD TEST and re-mark required procedures. AT-83
7.NPerform DTC CONFIRMATION PROCEDURE for following MIL indicating items and check out NG items.
Refer to EC-58, ªEmission-related Diagnostic Informationº.EC section
NDTC (P0731) A/T 1st gear function, AT-202.
NDTC (P0732) A/T 2nd gear function, AT-209.
NDTC (P0733) A/T 3rd gear function, AT-215.
NDTC (P0734) A/T 4th gear function, AT-221.
8.NPerform the Diagnostic Procedures for all remaining items marked NG. Repair or replace the damaged
parts.
Refer to the Symptom Chart when you perform the procedures. (The chart also shows some other possible
symptoms and the component inspection orders.)AT-103
AT-116
9.NErase DTC from TCM and ECM memories. AT-50
TROUBLE DIAGNOSIS Ð INTRODUCTIONEURO-OBD
Introduction (Cont'd)
AT-75
1st through 3rd gears in ªDº position and engine brake func-
tions with overdrive control switch set to ªOFFº.
1st and 2nd gears in ª2º position and engine brake functions
with accelerator pedal released (fully closed throttle). ..... For-
ward clutch or forward one-way clutch slippage
Stall revolution is too high in R position:
+Engine brake does not function in ª1º position. ..... Low &
reverse brake slippage
+Engine brake functions in ª1º position. ..... Reverse clutch slip-
page
Stall revolution within specifications:
+Vehicle does not achieve speed of more than 80 km/h (50
MPH). ..... One-way clutch seizure in torque converter housing
CAUTION:
Be careful since automatic fluid temperature increases abnor-
mally.
+Slippage occurs in 3rd and 4th gears in ªDº position. ..... High
clutch slippage
+Slippage occurs in 2nd and 4th gear in ªDº position. ..... Brake
band slippage
+Engine brake does not function in 2nd and 3rd gears in ªDº
position, 2nd gear in ª2º position, and 1st gear in ª1º position
with overdrive control switch set to ªOFFº.
Stall revolution less than specifications:
+Poor acceleration during starts. ..... One-way clutch seizure in
torque converter
TROUBLE DIAGNOSIS Ð BASIC INSPECTION
Stall Test (Cont'd)
AT-80
Symptom ChartNJAT0029Numbers are arranged in order of inspection.
Perform inspections starting with number one and work up.
Symptom Condition Diagnostic ItemReference Page
Except for
Euro-OBDEURO-OBD
Engine cannot start in ªPº and ªNº
positions.
AT-291ON vehicle1. Ignition switch and starterEL-10, ªPOWER SUPPLY
ROUTINGº and SC-13,
ªSTARTING SYSTEMº
2. Control cable adjustment AT-344¬
3. PNP switch adjustment AT-344¬
Engine starts in position other than
ªNº and ªPº positions.
AT-291ON vehicle1. Control cable adjustment AT-344¬
2. PNP switch adjustment AT-344¬
Transaxle noise in ªPº and ªNº
positions.ON vehicle1. Fluid level AT-78¬
2. Line pressure test AT-82¬
3. Throttle position sensor (Adjustment)EC-168,
ªDTC P0120
THROTTLE
POSITION
SENSORºEC-168,
ªDTC P0120
THROTTLE
POSITION
SENSORº
4. Vehicle speed sensor´A/T (Revolution
sensor) and vehicle speed sensor´MTRAT-124,
AT-129AT-193,
AT-278
5. Engine speed signal AT-170 AT-198
OFF vehicle6. Oil pump AT-371¬
7. Torque converter AT-354¬
Vehicle moves when changing into
ªPº position, or parking gear does
not disengage when shifted out of
ªPº position.
AT-292ON vehicle 1. Control cable adjustment AT-344¬
OFF vehicle 2. Parking components AT-351 AT-351
Vehicle runs in ªNº position.
AT-293ON vehicle 1. Control cable adjustment AT-344¬
OFF vehicle2. Forward clutch AT-399¬
3. Reverse clutch AT-390¬
4. Overrun clutch AT-399¬
Vehicle will not run in ªRº position
(but runs in ªDº, ª2º and ª1º posi-
tions). Clutch slips.
Very poor acceleration.
AT-297ON vehicle1. Control cable adjustment AT-344¬
2. Line pressure test AT-82¬
3. Line pressure solenoid valve AT-174 AT-237
4. Control valve assembly AT-343¬
OFF vehicle5. Reverse clutch AT-390¬
6. High clutch AT-394¬
7. Forward clutch AT-399¬
8. Overrun clutch AT-399¬
9. Low & reverse brake AT-406¬
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTION
Symptom Chart
AT-103
Symptom Condition Diagnostic ItemReference Page
Except for
Euro-OBDEURO-OBD
Clutches or brakes slip somewhat
in starting.ON vehicle1. Fluid level AT-78¬
2. Control cable adjustment AT-344¬
3. Throttle position sensor (Adjustment)EC-168,
ªDTC P0120
THROTTLE
POSITION
SENSORºEC-168,
ªDTC P0120
THROTTLE
POSITION
SENSORº
4. Line pressure test AT-82¬
5. Line pressure solenoid valve AT-174 AT-237
6. Control valve assembly AT-343¬
7. Accumulator N-D AT-343¬
OFF vehicle8. Forward clutch AT-399¬
9. Reverse clutch AT-390¬
10. Low & reverse brake AT-406¬
11. Oil pump AT-371¬
12. Torque converter AT-354¬
Excessive creep. ON vehicle 1. Engine idling rpmEC-41, ªIdle
Speed and
Ignition Tim-
ingºEC-41, ªIdle
Speed and
Ignition Tim-
ingº
No creep at all.
AT-297 and AT-300ON vehicle1. Fluid level AT-78¬
2. Line pressure test AT-82¬
3. Control valve assembly AT-343¬
OFF vehicle4. Forward clutch AT-399¬
5. Oil pump AT-371¬
6. Torque converter AT-354¬
Failure to change gear from ªD
1º
to ªD
2º.ON vehicle1. PNP switch adjustment AT-344¬
2. Control cable adjustment AT-344¬
3. Shift solenoid valve A AT-140 AT-244
4. Control valve assembly AT-343¬
5. Vehicle speed sensor´A/T (Revolution
sensor) and vehicle speed sensor´MTRAT-124,
AT-129AT-193,
AT-278
OFF vehicle 6. Brake band AT-419¬
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTION
Symptom Chart (Cont'd)
AT-105
Symptom Condition Diagnostic ItemReference Page
Except for
Euro-OBDEURO-OBD
Failure to change gear from ªD
2º
to ªD
3º.ON vehicle1. PNP switch adjustment AT-344¬
2. Control cable adjustment AT-344¬
3. Shift solenoid valve B AT-146 AT-250
4. Control valve assembly AT-343¬
5. Vehicle speed sensor´A/T (Revolution
sensor) and vehicle speed sensor´MTRAT-124,
AT-129AT-193,
AT-278
OFF vehicle6. High clutch AT-394¬
7. Brake band AT-419¬
Failure to change gear from ªD
3º
to ªD
4º.ON vehicle1. PNP switch adjustment AT-344¬
2. Control cable adjustment AT-344¬
3. Shift solenoid valve A AT-140 AT-244
4. Vehicle speed sensor´A/T (Revolution
sensor) and vehicle speed sensor´MTRAT-124,
AT-129AT-193,
AT-278
5. A/T fluid temperature sensor AT-163 AT-187
OFF vehicle 6. Brake band AT-419¬
Too high a gear change point from
ªD
1ºtoªD2º, from ªD2ºtoªD3º,
from ªD
3ºtoªD4º.
AT-306, AT-309 and AT-312ON vehicle1. Throttle position sensor (Adjustment)EC-168,
ªDTC P0120
THROTTLE
POSITION
SENSORºEC-168,
ªDTC P0120
THROTTLE
POSITION
SENSORº
2. Vehicle speed sensor´A/T (Revolution
sensor) and vehicle speed sensor´MTRAT-124,
AT-129AT-193,
AT-278
3. Shift solenoid valve A AT-140 AT-244
4. Shift solenoid valve B AT-146 AT-250
Gear change directly from ªD
1ºto
ªD
3º occurs.ON vehicle1. Fluid level AT-78¬
2. Accumulator servo release AT-343¬
OFF vehicle 3. Brake band AT-419¬
Engine stops when shifting lever
into ªRº, ªDº, ª2º and ª1º.ON vehicle1. Engine idling rpmEC-41, ªIdle
Speed and
Ignition Tim-
ingºEC-41, ªIdle
Speed and
Ignition Tim-
ingº
2. Torque converter clutch solenoid valve AT-157 AT-231
3. Control valve assembly AT-343¬
OFF vehicle 4. Torque converter AT-354¬
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTION
Symptom Chart (Cont'd)
AT-106