Page 1295 of 2493

Symptom Condition Diagnostic ItemReference Page
Except for
Euro-OBDEURO-OBD
Maximum speed not attained.
Acceleration poor.ON vehicle1. Fluid level AT-78¬
2. PNP switch adjustment AT-344¬
3. Shift solenoid valve A AT-140 AT-244
4. Shift solenoid valve B AT-146 AT-250
5. Control valve assembly AT-343¬
OFF vehicle6. Reverse clutch AT-390¬
7. High clutch AT-394¬
8. Brake band AT-419¬
9. Low & reverse brake AT-406¬
10. Oil pump AT-371¬
11. Torque converter AT-354¬
Failure to change gear from ªD
4º
to ªD
3º.ON vehicle1. Fluid level AT-78¬
2. Throttle position sensor (Adjustment)EC-168,
ªDTC P0120
THROTTLE
POSITION
SENSORºEC-168,
ªDTC P0120
THROTTLE
POSITION
SENSORº
3. Overrun clutch solenoid valve AT-152 AT-265
4. Shift solenoid valve A AT-140 AT-244
5. Line pressure solenoid valve AT-174 AT-237
6. Control valve assembly AT-343¬
OFF vehicle7. Low & reverse brake AT-406¬
8. Overrun clutch AT-399¬
Failure to change gear from ªD
3º
to ªD
2º or from ªD4ºtoªD2º.ON vehicle1. Fluid level AT-78¬
2. Throttle position sensor (Adjustment)EC-168,
ªDTC P0120
THROTTLE
POSITION
SENSORºEC-168,
ªDTC P0120
THROTTLE
POSITION
SENSORº
3. Shift solenoid valve A AT-140 AT-244
4. Shift solenoid valve B AT-146 AT-250
5. Control valve assembly AT-343¬
OFF vehicle6. High clutch AT-394¬
7. Brake band AT-419¬
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTION
Symptom Chart (Cont'd)
AT-109
Page 1298 of 2493

Symptom Condition Diagnostic ItemReference Page
Except for
Euro-OBDEURO-OBD
Races extremely fast or slips in
changing from ªD
4ºorªD3ºtoªD1º
when depressing pedal.ON vehicle1. Fluid level AT-78¬
2. Throttle position sensor (Adjustment)EC-168,
ªDTC P0120
THROTTLE
POSITION
SENSORºEC-168,
ªDTC P0120
THROTTLE
POSITION
SENSORº
3. Line pressure test AT-82¬
4. Line pressure solenoid valve AT-174 AT-237
5. Control valve assembly AT-343¬
OFF vehicle6. Forward clutch AT-399¬
7. Forward one-way clutch AT-410¬
8. Low one-way clutch AT-350 AT-350
Vehicle will not run in any position.ON vehicle1. Fluid level AT-78¬
2. Control cable adjustment AT-344¬
3. Line pressure test AT-82¬
4. Line pressure solenoid valve AT-174 AT-237
OFF vehicle5. Oil pump AT-371¬
6. High clutch AT-394¬
7. Brake band AT-419¬
8. Low & reverse brake AT-406¬
9. Torque converter AT-354¬
10. Parking components AT-428¬
Transmission noise in ªDº, ª2º, ª1º
and ªRº positions.ON vehicle 1. Fluid level AT-78¬
OFF vehicle 2. Torque converter AT-354¬
Failure to change from ªD
3ºtoª22º
when changing lever into ª2º posi-
tion.
AT-320ON vehicle1. PNP switch adjustment AT-344¬
2. Throttle position sensor (Adjustment)EC-168,
ªDTC P0120
THROTTLE
POSITION
SENSORºEC-168,
ªDTC P0120
THROTTLE
POSITION
SENSORº
3. Overrun clutch solenoid valve AT-152 AT-265
4. Shift solenoid valve A AT-140 AT-244
5. Shift solenoid valve B AT-146 AT-250
6. Control valve assembly AT-343¬
7. Control cable adjustment AT-344¬
OFF vehicle8. Brake band AT-419¬
9. Overrun clutch AT-399¬
Gear change from ª2
2ºtoª23ºin
ª2º position.ON vehicle 1. PNP switch adjustment AT-344¬
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTION
Symptom Chart (Cont'd)
AT-112
Page 1300 of 2493

Symptom Condition Diagnostic ItemReference Page
Except for
Euro-OBDEURO-OBD
Transmission overheats.ON vehicle1. Fluid level AT-78¬
2. Engine idling rpmEC-41, ªIdle
Speed and
Ignition Tim-
ingºEC-41, ªIdle
Speed and
Ignition Tim-
ingº
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¬
OFF vehicle7. Oil pump AT-371¬
8. Reverse clutch AT-390¬
9. High clutch AT-394¬
10. Brake band AT-419¬
11. Forward clutch AT-399¬
12. Overrun clutch AT-399¬
13. Low & reverse brake AT-406¬
14. Torque converter AT-354¬
ATF shoots out during operation.
White smoke emitted from exhaust
pipe during operation.ON vehicle 1. Fluid level AT-78¬
OFF vehicle2. Reverse clutch AT-390¬
3. High clutch AT-394¬
4. Brake band AT-419¬
5. Forward clutch AT-399¬
6. Overrun clutch AT-399¬
7. Low & reverse brake AT-406¬
Offensive smell at fluid charging
pipe.ON vehicle 1. Fluid level AT-78¬
OFF vehicle2. Torque converter AT-354¬
3. Oil pump AT-371¬
4. Reverse clutch AT-390¬
5. High clutch AT-394¬
6. Brake band AT-419¬
7. Forward clutch AT-399¬
8. Overrun clutch AT-399¬
9. Low & reverse brake AT-406¬
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTION
Symptom Chart (Cont'd)
AT-114
Page 1301 of 2493

Symptom Condition Diagnostic ItemReference Page
Except for
Euro-OBDEURO-OBD
Torque converter is not locked up.ON 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. PNP switch adjustment AT-344¬
4. Engine speed signal AT-170 AT-198
5. A/T fluid temperature sensor AT-163 AT-187
6. Line pressure test AT-82¬
7. Torque converter clutch solenoid valve AT-157 AT-231
8. Control valve assembly AT-343¬
OFF vehicle 9. Torque converter AT-354¬
Torque converter clutch piston slip.ON vehicle1. Fluid level AT-78¬
2. Throttle position sensor (Adjustment)EC-168,
ªDTC P0120
THROTTLE
POSITION
SENSORºEC-168,
ªDTC P0120
THROTTLE
POSITION
SENSORº
3. Line pressure test AT-82¬
4. Torque converter clutch solenoid valve AT-157 AT-231
5. Line pressure solenoid valve AT-174 AT-237
6. Control valve assembly AT-343¬
OFF vehicle 7. Torque converter AT-354¬
Lock-up point is extremely high or
low.
AT-315ON 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. Torque converter clutch solenoid valve AT-157 AT-231
4. Control valve assembly AT-343¬
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTION
Symptom Chart (Cont'd)
AT-115
Page 1302 of 2493

Symptom Condition Diagnostic ItemReference Page
Except for
Euro-OBDEURO-OBD
A/T does not shift to ªD
4º when
driving with overdrive control
switch ªONº.ON vehicle1. Throttle position sensor (Adjustment)EC-168,
ªDTC P0120
THROTTLE
POSITION
SENSORºEC-168,
ªDTC P0120
THROTTLE
POSITION
SENSORº
2. PNP switch adjustment AT-344¬
3. Vehicle speed sensor´A/T (Revolution
sensor) and vehicle speed sensor´MTRAT-124,
AT-129AT-193,
AT-278
4. Shift solenoid valve A AT-140 AT-244
5. Overrun clutch solenoid valve AT-152 AT-265
6. Control valve assembly AT-343¬
7. A/T fluid temperature sensor AT-163 AT-187
8. Line pressure test AT-82¬
OFF vehicle9. Brake band AT-419¬
10. Overrun clutch AT-399¬
Engine is stopped at ªRº, ªDº, ª2º
and ª1º positions.ON vehicle1. Fluid level AT-78¬
2. Torque converter clutch solenoid valve AT-157 AT-231
3. Shift solenoid valve A AT-140 AT-244
4. Shift solenoid valve B AT-146 AT-250
5. Control valve assembly AT-343¬
SAT216J
TCM Terminals and Reference ValueNJAT0030PREPARATIONNJAT0030S01+Measure voltage between each terminal and terminal 25 or 48
by following ªTCM INSPECTION TABLEº.
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTION
Symptom Chart (Cont'd)
AT-116
Page 1303 of 2493

TCM HARNESS CONNECTOR TERMINAL LAYOUTNJAT0030S02
SAT999J
TCM INSPECTION TABLENJAT0030S03(Data are reference values.)
Terminal
No.Wire color Item ConditionJudgement stan-
dard
1 R/WLine pressure
solenoid valve
When releasing accelerator pedal
after warming up engine.1.5 - 2.5V
When depressing accelerator pedal
fully after warming up engine.0.5V or less
2 P/BLine pressure
solenoid valve
(with dropping
resistor)When releasing accelerator pedal
after warming up engine.5 - 14V
When depressing accelerator pedal
fully after warming up engine.0.5V or less
3 GY/RTorque converter
clutch solenoid
valve
When A/T performs lock-up. 8 - 15V
When A/T does not perform lock-up. 1V or less
5 *2 Y/R Ð
ÐÐ
6 *2 Y/G Ð Ð Ð
7 *2 Y/B Ð Ð Ð
8*2 BR/W Ð Ð Ð
9*2 G/Y Ð Ð Ð
10 BR/R Power sourceWhen turning ignition switch to
ªONº.Battery voltage
When turning ignition switch to
ªOFFº.1V or less
11 L/WShift solenoid
valve A
When shift solenoid valve A oper-
ates.
(When driving in ªD
1ºorªD4º.)Battery voltage
When shift solenoid valve A does
not operate.
(When driving in ªD
2ºorªD3º.)1V or less
12 L/YShift solenoid
valve BWhen shift solenoid valve B oper-
ates.
(When driving in ªD
1ºorªD2º.)Battery voltage
When shift solenoid valve B does
not operate.
(When driving in ªD
3ºorªD4º.)1V or less
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTION
TCM Terminals and Reference Value (Cont'd)
AT-117
Page 1343 of 2493

SAT322GC
DescriptionNJAT0055The torque converter clutch solenoid valve is activated, with the
gear in ªD
4º, by the TCM in response to signals sent from the
vehicle speed and throttle position sensors. Lock-up piston opera-
tion will then be controlled.
Lock-up operation, however, is prohibited when A/T fluid tempera-
ture is too low.
When the accelerator pedal is depressed (less than 2/8) in lock-up
condition, the engine speed should not change abruptly. If there is
a big jump in engine speed, there is no lock-up.
CONSULT-II REFERENCE VALUE IN DATA MONITOR
MODE
NJAT0055S01Remarks: Specification data are reference values.
Monitor item Condition Specification
Torque converter clutch solenoid valve
dutyLock-up ªOFFº
¯
Lock-up ªONºApproximately 4%
¯
Approximately 94%
TCM TERMINALS AND REFERENCE VALUENJAT0055S02Remarks: Specification data are reference values.
Terminal
No.Wire color Item ConditionJudgement
standard
3 GY/RTorque converter
clutch solenoid
valve
When A/T performs lock-up. 8 - 15V
When A/T does not perform lock-
up.1V or less
ON BOARD DIAGNOSIS LOGICNJAT0055S03
Diagnostic trouble code Malfunction is detected when ... Check items (Possible cause)
: T/C CLUTCH SOL/V TCM detects an improper voltage drop
when it tries to operate the solenoid
valve.+Harness or connectors
(The solenoid circuit is open or shorted.)
+T/C clutch solenoid valve
: 7th judgement flicker
TORQUE CONVERTER CLUTCH
SOLENOID VALVE
EXCEPT FOR EURO-OBD
Description
AT-157
Page 1344 of 2493
SAT580J
SAT818H
SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURENJAT0055S05After the repair, perform the following procedure to confirm the
malfunction is eliminated.
With CONSULT-IINJAT0055S05011) Start engine.
2) Select ªSELF-DIAG RESULTSº mode for A/T with CONSULT-
II.
3) Drive vehicle in D
1®D2®D3®D4®D4lock-up position.
Without CONSULT-IINJAT0055S05021) Start engine.
2) Drive vehicle in D
1®D2®D3®D4®D4lock-up position.
3) Perform self-diagnosis.
Refer to ªSELF-DIAGNOSTIC PROCEDURE (Without
CONSULT-II)º, AT-42.
TORQUE CONVERTER CLUTCH
SOLENOID VALVE
EXCEPT FOR EURO-OBD
Description (Cont'd)
AT-158