automatic transmission fluid TOYOTA SUPRA 1995 Service Owner's Manual

6. REMOVE REAR CENTER FLOOR CROSSMEMBER
BRACE
Normal Roof:
Remove the 4 bolts and center floor crossmember brace.
Torque: 13 NVm (130 kgfVcm, 9 ftVlbf)
Sport Roof:
Remove the 6 bolts and center floor crossmember brace.
Torque: 13 NVm (130 kgfVcm, 9 ftVlbf)
7. REMOVE PROPELLER SHAFT
(See page PR±7)
8. REMOVE SHIFT CONTROL ROD
(a) Remove the nut from shift lever.
INSTALLATION HINT: Inspect and adjust the park/ neutral
position switch.
(b) Remove the nut and control rod with the control shaft lever.
Torque: 16 NVm (160 kgfVcm, 12 ftVlbf)
9. DISCONNECT THESE CONNECTORS
w No.1 vehicle speed sensor connector
w No.2 vehicle speed sensor connector
w Solenoid wire connector
w Sensor cover
w A/T fluid temp. sensor connector
w Park/neutral position switch connector
10. DISCONNECT 3 WIRE CLAMPS FROM THE BRACKET
ON TRANSMISSION AT1±24
± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONASSEMBLY REMOVAL AND INSTALLATION

PROBLEM SYMPTOM CONFIRMATION
Taking into consideration the results of the customer problem analysis, try to reproduce the symptoms of
the trouble. If the problem is that the transmission does not up±shift, does not down±shift, or the shift point
is too high or too low, conduct the following road test to confirm the automatic shift schedule and simulate
the problem symptoms.
ROAD TEST
NOTICE: Do the test at normal A/T fluid operating temp.
50±80°C (122 ± 176°F).
1. D POSITION TEST (NORM PATTERN)
Shift into the D position and keep the accelerator pedal
constant at the full throttle valve opening position, and check
the following points:
(a) Check up±shift operation.
Check that 1±2, 2±3 and 3±O/D up±shift takes place, at the
shift point shown in the automatic shift schedule.
(See page AT1±96)
HINT:
(1) O/D Gear Up±shift Prohibition Control.
w Coolant temp. is 60°C (140°F) or less.
w If there is a 10 km/h (6 mph) difference between the set
cruise control speed and
wvehicle speed.
wO/D main switch is pushed ON.
w(During O/D OFF, indicator light lights up.)
(2) O/D Gear Lock±up Prohibition Control.
w Brake pedal is depressed.
w Coolant temp. is 60°C (140°F) or less.
(b) Check for shift shock and slip.
Check for shock and slip at the 1±2, 2±3 and 3±O/ D up±
shifts.
(c) Check for abnormal noise and vibration.
Run at the D position lock±up or O/D gear and check for ab-
normal noise and vibration.
HINT: The check for the cause of abnormal noise and vibra-
tion must be performed very thoroughly as it could also be
due to loss of balance in the torque converter clutch, etc.
± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONTROUBLESHOOTINGAT1±37

PRELIMINARY CHECK
1. CHECK FLUID LEVEL
HINT:
wDrive the vehicle so that the engine and transmission
are at normal operating temp..
Fluid temp. 70±80 °C (158±176 °F)
wOnly use the COOL range on the dipstick as a rough
reference when the fluid is replaced or the engine does
not run.
(a) Park the vehicle on a level surface and set the parking brake.
(b) With the engine idling and the brake pedal depressed, shift
the shift lever into all positions from P to L position and return
to P position.
(c) Pull out the transmission dipstick and wipe it clean.
(d) Push it back fully into the pipe.
(e) Pull it out and check that the fluid level is in the HOT range.
If the level is at the low side, add fluid.
Fluid type:
DEXRON[ II
NOTICE: Do not overfill.
2. CHECK FLUID CONDITION
If the fluid smells burnt or is black, replace it.
3. REPLACE TRANSMISSION FLUID
(a) Remove the drain plug and drain the fluid.
(b) Reinstall the drain plug securely.
(c) With the engine OFF, add new fluid through the oil filler pipe.
Fluid type:
DEXRON[ II
Capacity:
Dry fill: 7.2 liters (7.6 US qts, 6.3 Imp. qts)
Drain and refill: 1.6 liters (1.7 US qts, 1.4 Imp. qts)
(d) Start the engine and shift the shift lever into all positions from
P to L position and then shift into P position.
(e) With the engine idling, check the fluid level. Add fluid up to the
COOL level on the dipstick.
(f) Check the fluid level at the normal operating temperature
70±80 5C (158±176 5F) and add as necessary.
NOTICE: Do not overfill.
4. CHECK FLUID LEAKS
Check for leaks in the transmission.
If there are leaks, it is necessary to repair or replace O±rings,
seal packings, oil seals, plugs or other parts. AT1±42
± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONTROUBLESHOOTING

MECHANICAL SYSTEM TEST
STALL TEST
The object of this test is to check the overall performance of the transmission and engine by measuring
the stall speeds in the D and R positions.
NOTICE:
wDo the test at normal operating fluid temp. 50±80 °C (122±176 °F).
wDo not continuously run this test longer than 5 seconds.
wTo ensure safety, conduct this test in a wide, clear, level area which provides good traction.
wThe stall test should always be carried out in pairs. One technician should observe the
conditions of wheels or wheel stoppers outside the vehicle while the other is doing the test.
MEASURE STALL SPEED
(a) Chock the 4 wheels.
(b) Connect a tachometer to the engine.
(c) Fully apply the parking brake.
(d) Keep your left foot pressed firmly on the brake pedal.
(e) Start the engine.
(f) Shift into the D position. Fully depress the accelerator pedal with your right foot. Quickly read the stall
speed.
Stall speed:
2,450 + 150 rpm
(g) Do the same test in R position.
Quickly read the stall speed.
Stall speed:
2,450 + 150 rpm
AT1±44± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONTROUBLESHOOTING

EVALUATION
ProblemPossible cause Problem Possible cause
 
 
 
 
 
(a) Stall speed low in D and R positions.
 
 
 
 
 
wEngine output may be insufficient.
wStator one±way clutch is operating properly
HINT:
If more than 600 rpm below the specified value, the
torque converter clutch could be faulty.
 
 (b) Stall speed high in Dposition
wLine pressure too low
wForward clutch slipping
 
 
(b) Stall speed high in D position.Forward clutch sli ing
wNo.2 one±way clutch not operating properly
wO/D one±way clutch not operating properly
 
 
(c) Stall speed high in Rposition
wLine pressure too low
wDirect clutch slipping
 
 
(c) Stall speed high in R position.Direct clutch sli ing
wFirst and reverse brake slipping
wO/D clutch one±way clutch not operating properly
 
 (d) Stall speed high in D and Rpositions
wLine pressure too low
wImproper fluid level
 
(d) Stall speed high in D and R positions.wImproper fluid level
wO/D one±way clutch not operating properly
± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONTROUBLESHOOTINGAT1±45

TIME LAG TEST
When the shift lever is shifted while the engine is idling, there will be a certain time lapse or lag before the
shock can be felt. This is used for checking the condition of the O/D direct clutch, forward clutch, direct
clutch, and first and reverse brake.
NOTICE:
wDo the test at normal operating fluid temp. 50±80
°C (122±176 °F).
wBe sure to allow a one minute interval between tests.
wTake 3 measurements and take the average value.
MEASURE TIME LAG
(a) Fully apply the parking brake
(b) Start the engine and check idle speed.
Idle speed:
700 + 50 rpm (In N position and air conditioner OFF)
(c) Shift the shift lever from N to D position. Using a stop watch, measure the time it takes from shifting the
lever until the shock is felt.
In same manner, measure the time lag for N " R.
Time lag:
N
" D Less than 1.2 seconds
N
" R Less than 1.5 seconds
AT1±46± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONTROUBLESHOOTING

HYDRAULIC TEST
MEASURE LINE PRESSURE
NOTICE:
wDo the test at normal operating fluid temp. 50±80 5C (122±176 5F).
wThe line pressure test should always be carried out in pairs. One technician should observe the
conditions of wheels or wheel stoppers outside the vehicle while the other is doing the test.
wBe careful to prevent the oil pressure gauge hose from interfering with the exhaust pipe.
(a) Warm up the transmission fluid.
(b) Remove the test plug on the transmission case left side and connect the oil pressure gauge (SST). SST
09992±00094 (Oil pressure gauge)
HINT: Connecting the oil pressure gauge will be made easier by moving LH side heat insulator aside.
(c) Fully apply the parking brake and chock the 4 wheels.
(d) Start the engine and check idling RPM.
(e) Keep your left foot pressed firmly on the brake pedal and shift into D position.
(f) Measure the line pressure when the engine is idling.
(g) Press the accelerator pedal all the way down. Quickly read the highest line pressure when engine speed
reaches stall speed.
(h) In the same manner, do the test in R position. AT1±48
± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONTROUBLESHOOTING

SPECIFIED LINE PRESSURE
 Line pressure D position kPa (kgf/cm2,psi) R position kPa (kgf/cm2, psi)
 Idling363 422 (3 7 4 3 53 61)500 598 (5 1 6 1 73 88)Idling363±422 (3.7±4.3, 53±61)500±598 (5.1±6.1, 73±88) 
Stall902 1 147 (9 2 11 7 131 166)1 236 1 589 (12 6 16 2 179 230) Stall902±1,147 (9.2±11.7, 131±166)1,236±1,589 (12.6±16.2, 179±230)
If the measured pressures are not up to specified values, recheck the throttle cable adjustment and retest.
EVALUATION
 Problem Possible cause 
 
If the measured values at allpositions are higher
V Throttle cable out of adjustment
Throttle valve defective  If the measured values at all positions are higher.V Throttle valve defective
V Regulator valve defective
 
 
 If the measured values at allpositions are lower
V Throttle cable out of adjustment
V Throttle valve defective
Regulator valve defective 
 
If the measured values at all positions are lower.V Regulator valve defective
V Oil pump defective
V O/D direct clutch defective
 
Ifpressure is low in the Dposition onlyV D position circuit fluid leakage  If pressure is low in the D position only. D osition circuit fluid leakage
V Forward clutch defective 
 Ifpressure is low in the Rposition only
V R position circuit fluid leakage
Direct clutch defective  If pressure is low in the R position onlyV Direct clutch defective
V First and reverse brake defective
± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONTROUBLESHOOTINGAT1±49

DTC
No.Blinking
PatternCircuitDiagnostic Trouble Code Detection Condition
38
42
Either (a) or (b) are detected for 0.5 sec. or more.
(a) Temperature sensor resistance less than 79 
(b) After the engine has been operating for 15 minutes or more,
the resistance at the temperature sensor is more than 156 k
All conditions below are detected 500 times or more continuously.
(2 trip detection logic) *3
(a) No No. 1 vehicle speed sensor signal in 16 pulses of No. 2
vehicle speed sensor signal.
(b) Vehicle speed: 9 km/h (5.6 mph) or more for 4 secs. or more.
(c) Park/neutral position switch: OFF (Other than P or N position)
A/T fluid
temp.
sensor
No. 1 vehicle
speed sensor
No. 2 vehicle
speed sensor
All conditions below are detected 500 times or more continuously.
(2 trip detection logic) *3
(a) No No. 2 vehicle speed sensor signal in 4 pulses of No. 1
vehicle speed sensor signal.
(b) Vehicle speed: 9 km/h (5.6 mph) or more for 4 secs. or more.
(c) Park/neutral position switch: OFF (Other than P or N position)
No. 1
solenoid
valve
(1) Solenoid resistance of 8 or less is detected (*) 8 times or
more when No. 1 solenoid is energized.
(2) Solenoid resistance of 100 k or more is detected (*) 8 times
or more when No. 1 solenoid is not energized.
(*) If the above failures are detected less than 8 times, the ECM
memorizes the malfunction code but the O/D OFF indicator
light does not blink.
No. 2
solenoid
valve
(1) Solenoid resistance of 8 or less is detected (*) 8 times or
more when No. 2 solenoid is energized.
(2) Solenoid resistance of 100 k or more is detected (*) 8 times
or more when No. 2 solenoid is not energized.
(*) If the above failures are detected less than 8 times, the ECM
memorizes the malfunction code but the O/D OFF indicator
light does not blink.
Lock±up
solenoid
valve
(a) Solenoid resistance is 8 or lower (short circuit) when
solenoid energized.
(b) Solenoid resistance is 100 k or higher (open circuit) when
solenoid is not energized.
(*) ECM memorizes diag. trouble code 64 if above (a) or (b)
condition is detected once or more, but ECM does not start
O/D OFF indicator light blinking.
61
62
63
64
DIAGNOSTIC TROUBLE CODE CHART
If a diagnostic trouble code is displayed during the diagnostic trouble code check, check the circuit listed
for that code in the table below and proceed to the page given. AT1±52
± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONTROUBLESHOOTING

AT1±64
AT1±66
AT1±69
AT1±72
AT1±72
AT1±75
Trouble AreaO/D OFF Light *1
BlinksMemory *2See
Page

Harness or connector between A/T fluid temp. senter and
ECM.

A/T fluid temp. sensor.

ECM

Harness or connector between No. 1 vehicle speed sensor
and ECM.

No. 1 vehicle speed sensor.

Telltale light RH.

ECM

Harness or connector between No. 2 vehicle speed sensor
and ECM.

No. 2 vehicle speed sensor.

ECM

Harness or connector between No. 1 solenoid and ECM.

No. 1 solenoid valve.

ECM

Harness or connector between No. 2 solenoid and ECM.

No. 2 solenoid valve.

ECM

Harness or connector between lock±up solenoid and ECM.

Lock±up solenoid valve.

ECM
± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONTROUBLESHOOTINGAT1±53