A/T Fluid Check
FLUID LEAKAGE CHECK
1. Clean area suspected of leaking. Ð for example, mating sur-
face of converter housing and transmission case.
2. Start engine, apply foot brake, place selector lever in ªDº posi-
tion and wait a few minutes.
3. Stop engine.
4. Check for fresh leakage.
FLUID CONDITION CHECK
Fluid color Suspected problem
Dark or black with burned odor Wear of frictional material
Milky pinkWater contamination Ð Road water enter-
ing through filler tube or breather
Varnished fluid, light to dark
brown and tackyOxidation Ð Over or under filling, Ð Over-
heating
FLUID LEVEL CHECK
Refer to MA section (ªChecking A/T Fluidº, ªCHASSIS AND BODY
MAINTENANCEº).
Stall Test
STALL TEST PROCEDURE
1. Check A/T and engine fluid levels. If necessary, add.
2. Drive vehicle for approx. 10 minutes or until engine oil and ATF
reach operating temperature.
ATF operating temperature:
50 - 80ÉC (122 - 176ÉF)
3. Set parking brake and block wheels.
4. Install a tachometer where it can be seen by driver during test.
IIt is good practice to put a mark on point of specified
engine rpm on indicator.
5. Start engine, apply foot brake, and place selector lever in ªDº
position.
6. Accelerate to wide open throttle gradually while applying foot
brake.
7. Quickly note the engine stall revolution and immediately
release throttle.
IDuring test, never hold throttle wide open for more than 5
seconds.
Stall revolution:
2,450 - 2,700 rpm
SAT801A
SAT638A
SAT647B
SAT513G
SAT514G
TROUBLE DIAGNOSIS Ð Basic Inspection
AT-27
Line Pressure Test
LINE PRESSURE TEST PORTS
ILocation of line pressure test ports.
IAlways replace line pressure plugs as they are self-
sealing bolts.
LINE PRESSURE TEST PROCEDURE
1. Check A/T and engine fluid levels. If necessary, add fluid.
2. Drive vehicle for approx. 10 minutes or until engine oil and ATF
reach operating temperature.
ATF operating temperature:
50 - 80ÉC (122 - 176ÉF)
3. Install pressure gauge to corresponding line pressure port.
SAT209GA
SAT647B
SAT518GB
SAT519GA
TROUBLE DIAGNOSIS Ð Basic Inspection
AT-30
Symptom Chart
FON vehicleEFOFF vehicleE
Reference page (AT- )27,
11 511 454,
60,
803063,
13966,
8469,
7276,
11 311 3 11 369,
123151,
155157157,
165161,
171175
Numbers are arranged in order of probability.
Perform inspections starting with number one and
work up. Circled numbers indicate that the transmis-
sion must be removed from the vehicle.
Fluid level
Control linkage
Park/neutral position switch
Throttle (accelerator) position sensor (Adjustment)
Revolution sensor and vehicle speed sensor
Engine speed signal
Engine idling speed
Line pressure
Control valve assembly
Shift solenoid valve A
Shift solenoid valve B
Line pressure solenoid valve
Torque converter clutch solenoid valve
Overrun clutch solenoid valve
A/T fluid temperature sensor
Accumulator N-D
Accumulator 1-2
Accumulator 2-3
Accumulator 3-4 (N-R)
Ignition switch and starter
Torque converter
Oil pump
Reverse clutch
High clutch
Forward clutch
Forward one-way clutch
Overrun clutch
Low one-way clutch
Low & reverse brake
Brake band
Parking pawl components
Engine does not start in ªNº, ªPº positions. . 2 3................1.......... .
Engine starts in position other than ªNº and ªPº. . 1 2................. .......... .
Transmission noise in ªPº and ªNº positions. 1 . . 3 4 5 . 2............q
7q6........ .
Vehicle moves when changing into ªPº position or
parking gear does not disengage when shifted out
of ªPº position.. 1.................. ..........q
2
Vehicle runs in ªNº position. . 1................2. ..q4.q3.q5... .
Vehicle will not run in ªRº position (but runs in ªDº,
ª2º and ª1º positions). Clutch slips.
Very poor acceleration.. 1.....24..3........ ..q
5q6q7.q8.q9..
Vehicle braked when shifting into ªRº position. 1 2.....35..4........ ...q
6q8.q9..q7.
Sharp shock in shifting from ªNº to ªDº position. . . . 2 .5137 . . 6 . . 48.... ....q
10..... .
Vehicle will not run in ªDº and ª2º positions (but runs
in ª1º and ªRº position).. 1.................. .......q
2.. .
Vehicle will not run in ªDº, ª1º and ª2º positions (but
runs in ªRº position). Clutch slips.
Very poor acceleration.1 ......24..3...5.... ..q
6q7q8q9.q10.. .
Clutches or brakes slip somewhat in starting. 1 2 . 3 . . . 4 6 . . 5 . . . 7 . . 8 .q
13q12q10.q9...q11..
Excessive creep. ......1............. .......... .
No creep at all. 1......23...........q
6q5..q4..... .
Failure to change gear from ªD
1ºtoªD2º. . 21.5...43.......... .........q6.
Failure to change gear from ªD
2ºtoªD3º. . 21.5...4.3......... ...q6.....q7.
Failure to change gear from ªD
3ºtoªD4º. . 21.4....3....5..... .........q6.
Too high a gear change point from ªD
1ºtoªD2º, from
ªD2ºtoªD3º, from ªD3ºtoªD4º.. ..12....34......... .......... .
Gear change directly from ªD
1ºtoªD3º occurs. 1...............2... .........q3.
Engine stops when shifting lever into ªRº, ªDº, ª2º
and ª1º.. .....1.3...2.......q
4......... .
Too sharp a shock in change from ªD
1ºtoªD2º. . ..1...24.....5.3... .........q6.
Too sharp a shock in change from ªD
2ºtoªD3º. . ..1...24........3.. ...q5.....q6.
TROUBLE DIAGNOSIS Ð General Description
AT-43
FON vehicleEFOFF vehicleE
Reference page (AT- )27,
11 511 454,
60,
803063,
13966,
8469,
7276,
11 311 3 11 369,
123151,
155157157,
165161,
171175
Numbers are arranged in order of probability.
Perform inspections starting with number one and
work up. Circled numbers indicate that the transmis-
sion must be removed from the vehicle.
Fluid level
Control linkage
Park/neutral position switch
Throttle (accelerator) position sensor (Adjustment)
Revolution sensor and vehicle speed sensor
Engine speed signal
Engine idling speed
Line pressure
Control valve assembly
Shift solenoid valve A
Shift solenoid valve B
Line pressure solenoid valve
Torque converter clutch solenoid valve
Overrun clutch solenoid valve
A/T fluid temperature sensor
Accumulator N-D
Accumulator 1-2
Accumulator 2-3
Accumulator 3-4 (N-R)
Ignition switch and starter
Torque converter
Oil pump
Reverse clutch
High clutch
Forward clutch
Forward one-way clutch
Overrun clutch
Low one-way clutch
Low & reverse brake
Brake band
Parking pawl components
Too sharp a shock in change from
ªD3ºtoªD4º.. ..1...24.........3. ......q6..q5.
Almost no shock or clutches slipping in change from
ªD
1ºtoªD2º.1 ..2...35.......4... .........q6.
Almost no shock or slipping in change from ªD
2ºto
ªD3º.1 ..2...35........4.. ...q6.....q7.
Almost no shock or slipping in change from ªD
3ºto
ªD4º.1 ..2...35.........4. ...q6.....q7.
Vehicle braked by gear change from ªD
1ºtoªD2º. 1 ................... ..q2q4...q5q3..
Vehicle braked by gear change from ªD
2ºtoªD3º. 1 ................... .........q2.
Vehicle braked by gear change from ªD
3ºtoªD4º. 1 ................... ..q4..q3q2... .
Maximum speed not attained. Acceleration poor. 1 . 2.....534.........q
11q10q6q7....q9q8.
Failure to change gear from ªD
4ºtoªD3º. 1 ..2....64.5.3...... ......q8.q7..
Failure to change gear from ªD
3ºtoªD2º or from
ªD4ºtoªD2º.1 ..2....534......... ...q6.....q7.
Failure to change gear from ªD
2ºtoªD1º or from
ªD3ºtoªD1º.1 ..2....534......... ...q7...q6.q8.
Gear change shock felt during deceleration by
releasing accelerator pedal.. ..1...24....3...... .......... .
Too high a change point from ªD
4ºtoªD3º, from ªD3º
to ªD2º, from ªD2ºtoªD1º.. ..12............... .......... .
Kickdown does not operate when depressing pedal
in ªD
4º within kickdown vehicle speed.. ..12....34......... .......... .
Kickdown operates or engine overruns when
depressing pedal in ªD
4º beyond kickdown vehicle
speed limit.. ..21....34......... .......... .
Races extremely fast or slips in changing from ªD
4º
to ªD3º when depressing pedal.1 ..2...35..4........ ...q6q7..... .
Races extremely fast or slips in changing from ªD
4º
to ªD2º when depressing pedal.1 ..2...365.4........ ....q8....q7.
Races extremely fast or slips in changing from ªD
3º
to ªD2º when depressing pedal.1 ..2...35..4..6..7.. ...q10q9....q8.
Races extremely fast or slips in changing from ªD
4º
or ªD3ºtoªD1º when depressing pedal.1 ..2...35..4........ ....q6q7.q8.. .
Vehicle will not run in any position. 1 2.....3...4........q
9q5.q6....q8q7q10
Transmission noise in ªDº, ª2º, ª1º and ªRº positions. 1...................q2......... .
TROUBLE DIAGNOSIS Ð General Description
Symptom Chart (Cont'd)
AT-44
FON vehicleEFOFF vehicleE
Reference page (AT- )27,
11 511 454,
60,
803063,
13966,
8469,
7276,
11 311 3 11 3139,
123151,
155157157,
165161,
171175
Numbers are arranged in order of probability.
Perform inspections starting with number one and
work up. Circled numbers indicate that the transmis-
sion must be removed from the vehicle.
Fluid level
Control linkage
Park/neutral position switch
Throttle (accelerator) position sensor (Adjustment)
Revolution sensor and vehicle speed sensor
Engine speed signal
Engine idling speed
Line pressure
Control valve assembly
Shift solenoid valve A
Shift solenoid valve B
Line pressure solenoid valve
Torque converter clutch solenoid valve
Overrun clutch solenoid valve
A/T fluid temperature sensor
Accumulator N-D
Accumulator 1-2
Accumulator 2-3
Accumulator 3-4 (N-R)
Ignition switch and starter
Torque converter
Oil pump
Reverse clutch
High clutch
Forward clutch
Forward one-way clutch
Overrun clutch
Low one-way clutch
Low & reverse brake
Brake band
Parking pawl components
Failure to change from ªD3º to ª2º when changing
lever into ª2º position.. 712....654..3...... ......q9..q8.
Gear change from ª2
1ºtoª22º in ª2º position. . . 1................. .......... .
Engine brake does not operate in ª1º position. .2134 . . . 65 . . . 7...... ......q
8.q9..
Gear change from ª1
1ºtoª12º in ª1º position. . 2 1................. .......... .
Does not change from ª1
2ºtoª11º in ª1º position. . . 1 . 2 . . . 4 3 . . . 5...... ......q6.q7..
Large shock changing from ª1
2ºtoª11º in ª1º posi-
tion.. .......1........... ........q2..
Transmission overheats. 1 . . 3 . . 2 4 6 . . 5........q
14q7q8q9q11.q12.q13q10.
ATF shoots out during operation.
White smoke emitted from exhaust pipe during
operation.1 ................... ..q
2q3q5.q6.q7q4.
Offensive smell at fluid charging pipe. 1...................q
2q3q4q5q7.q8.q9q6.
Torque converter is not locked up. . .3124 . 68 . . . 7 . 5.....q
9......... .
Torque converter clutch piston slip 1 . . 2 . . . 3 6 . . 5 4.......q
7......... .
Lock-up point is extremely high or low. . . . 1 2 . . . 4 . . . 3....... .......... .
A/T does not shift to ªD
4º when driving with over-
drive control switch ªONº.. .213..864...57..... ......q10..q9.
Engine is stopped at ªRº, ªDº, ª2º and ª1º positions. 1.......543.2....... .......... .
TROUBLE DIAGNOSIS Ð General Description
Symptom Chart (Cont'd)
AT-45
7. In ªNº Position, Vehicle Moves
SYMPTOM:
Vehicle moves forward or backward when selecting ªNº posi-
tion.
Does ªECU INPUT SIGNALSº in
Data Monitor show damage to park/
neutral position switch circuit?
-----------------------------------------------------------------------------------------------------------------------OR -----------------------------------------------------------------------------------------------------------------------
Does self-diagnosis show damage to
park/neutral position switch circuit?
No
EYe s
Check park/neutral position
switch. Refer to AT-92.
Check control linkage. Refer to AT-115.
OK
ENG
Adjust control linkage.
Refer to AT-115.
Check A/T fluid level again.
OK
ENG
Refill ATF.
1. Remove oil pan.
2. Check A/T fluid condition.
OK
ENG
1. Disassemble A/T.
2. Check the following
items:
IForward clutch assembly
IOverrun clutch assembly
IReverse clutch assembly
Check again.
OK
ENG
1. Perform TCM input/
output signal inspection.
2. If NG, recheck TCM pin
terminals for damage or
loose connection with
harness connector.
INSPECTION END
SAT146BA
NAT276
SAT638A
SAT171B
H
H
H
H H
H
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
AT-98
9. Vehicle Does Not Creep Backward In ªRº
Position
SYMPTOM:
Vehicle does not creep backward when selecting ªRº position.
Check A/T fluid level again.
OK
ENG
Refill ATF.
qA
NG in both ª1º
and ªRº positions
Check stall revolution with selector
lever in ª1º and ªRº positions.
OK
OK in ª1º position
NG in ªRº position
E1. Remove control valve
assembly. Refer to AT-113.
2. Check the following items:
IValves to control line pres-
sure (Pressure regulator
valve, pressure modifier
valve, pilot valve and pilot
filter)
ILine pressure solenoid valve
3. Disassemble A/T.
4. Check the following items:
IOil pump assembly
ITorque converter
IReverse clutch assembly
IHigh clutch assembly
ILow & reverse brake assem-
bly
ILow one-way clutch
1. Remove control valve
assembly. Refer to AT-113.
2. Check the following items:
IValves to control line pres-
sure (Pressure regulator
valve, pressure modifier
valve, pilot valve and pilot
filter)
ILine pressure solenoid valve
3. Disassemble A/T.
4. Check the following items:
IOil pump assembly
ITorque converter
IReverse clutch assembly
IHigh clutch assembly
Check line pressure at idle with
selector lever in ªRº position. Refer to
ªLine Pressure Testº, AT-30.
OK
ENG
1. Remove control valve
assembly. Refer to AT-113.
2. Check the following items:
IValves to control line pres-
sure (Pressure regulator
valve, pressure modifier
valve, pilot valve and pilot
filter)
ILine pressure solenoid valve
3. Disassemble A/T.
4. Check the following item:
IOil pump assembly
1. Remove oil pan.
2. Check A/T fluid condition.
NG OK
q
A
Check again.
OK
ENG
1. Perform TCM input/output
signal inspection.
2. If NG, recheck TCM pin ter-
minals for damage or loose
connection with harness con-
nector.
INSPECTION END
SAT638A
SAT493G
SAT494G
SAT171B
HH
H
H
H
H
H
H
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
AT-100
10. Vehicle Does Not Creep Forward In ªDº, ª2º
Or ª1º Position
SYMPTOM:
Vehicle does not creep forward when selecting ªDº, ª2º or ª1º
position.
Check A/T fluid level again.
OK
ENG
Refill ATF.
qA
Check stall revolution with selector lever in
ªDº position. Refer to ªSTALL TESTº, AT-27.
OK
ENG
1. Remove control valve
assembly. Refer to
AT-113.
2. Check the following
items:
IValves to control line
pressure (Pressure
regulator valve, pres-
sure modifier valve,
pilot valve and pilot
filter)
ILine pressure sole-
noid valve
3. Disassemble A/T.
4. Check the following
items:
IOil pump assembly
IForward clutch
assembly
IForward one-way
clutch
ILow one-way clutch
ILow & reverse brake
assembly
ITorque converter
Check line pressure at idle with selector
lever in ªDº position. Refer to ªLine Pressure
Testº, AT-30.
OK NG
1. Remove control valve assembly.
Refer to AT-113.
2. Check the following items:
IValves to control line pressure
(Pressure regulator valve, pressure
modifier valve, pilot valve and pilot
filter)
ILine pressure solenoid valve
3. Disassemble A/T.
4. Check the following item:
IOil pump assembly
1. Remove oil pan.
2. Check A/T fluid condition.
OK
ENG
qA
Check again.
OK
ENG
1. Perform TCM input/
output signal inspec-
tion.
2. If NG, recheck TCM
pin terminals for
damage or loose
connection with har-
ness connector.
INSPECTION END
SAT638A
SAT493G
SAT494G
SAT171B
HH
H
H
H
H H
H
DIAGNOSTIC PROCEDURES FOR SYMPTOMS
AT-101