automatic transmission fluid TOYOTA SUPRA 1995 Service User Guide

FUNCTION OF ECU
w Control of Shifting Timing
The ECM has programmed into its memory the optimum shift pattern for each shift lever position (D, 2, L
position) and driving mode (Normal or Manual).
Based on the appropriate shift pattern, the ECM turns No.1 and No.2 solenoid valves on or off in accor-
dance with the vehicle speed signal from the vehicle speed sensor and the throttle opening signal from the
throttle position sensor. In this manner, the ECM operates each shift valve, opening or closing the fluid pas-
sages to the clutches and brakes to permit up±shift or down±shift of the transmission.
HINT: The electronic control system provides shift timing and lock±up control only while the vehicle is travel-
ing forward. In REVERSE, PARK, and NEUTRAL, the transmission is mechanically, not electronically con-
trolled.
w Control of Overdrive
Driving in overdrive is possible if the O/D main switch is on and the shift lever is in the D position. However,
when the vehicle is being driven using the cruise control system (CCS), if the actual vehicle speed drops
to about 4 km/h (2 mph) below the set speed while the vehicle is running in overdrive, the CCS ECU sends
a signal to the ECM to release the overdrive and prevent the transmission from shifting back into overdrive
until the actual vehicle speed reaches the speed set in the CCS memory.
On this model, if the engine coolant temperature falls below 60°C (140°F), the ECM sends a signal to the
ECM, preventing the transmission from up±shifting into overdrive.
w Control of Lock±Up System
The ECM has programmed in its memory a lock±up clutch operation pattern for each driving mode (Normal
of Manual). Based on this lock±up pattern, the ECM turns lock±up solenoid valve on or off in accordance
with the vehicle speed signals received from the vehicle speed sensor and the throttle opening signals from
the throttle position sensor.
Depending on whether lock±up solenoid valve is on or off, the lock±up relay valve performs changeover
of the fluid passages for the converter pressure acting on the torque converter clutch to engage or disen-
gage the lock±up clutch.
Mandatory Cancellation of Lock±Up System:
If any of the following conditions exist, the ECM turns off lock±up solenoid valve to disengage the lock±up
clutch.
1) The brake light switch comes on (during braking).
2) The IDL points of the throttle position sensor close (throttle valve fully closed).
3) The vehicle speed drops 4 km/h (2 mph) or more below the set speed while the cruise control system
is operating.
4) The engine coolant temperature falls below 60°C (140°F) and vehicle speed is under 60 km/h (37
mph), or 35°C (95°F) and vehicle speed is under 40 km/h (25 mph).
The purpose of 1) and 2) above is to prevent the engine from stalling if the rear wheels lock up.
The purpose of 3) is to cause the torque converter clutch to operate to obtain torque multiplication. The
purpose of 4) is both to improve general driveability, and to speed up transmission warm±up.
Also, while the lock±up system is in operation, the ECM will temporarily turn it off during up±shift or down±
shift in order to decrease shifting shock. AT1±8
± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONOPERATION

 
 
 
8
 
 
 
No.1 and No.2 Vehicle Speed Sensor
 
 
 
Detects the vehicle speed. Ordinarily, transmission control
uses signals from the No.2 vehicle speed sensor, and the
No.1 vehicle speed sensor is used as a back±up.
 9Engine Coolant Temp SensorDetects the engine coolant temp 9Engine Coolant Temp. SensorDetects the engine coolant temp.
 
10ECMControls the engine and transmission actuators based on 10ECMControls the engine and transmission actuators based on
signals from each sensor. 
 11No 1 and No 2 Solenoid ValvesControl the hydraulic pressure applied to each shift valve,
 11No.1 and No.2 Solenoid ValvesControl the hydraulic ressure a lied to each shift valve,
and control the gear position and timing.
 
12
Lock±up Solenoid Valve
(For lock up control pressure modulaControls the hydraulic pressure applied to the lock±up 
 
12(For lock±up control pressure modula-
tion)Controls the hydraulic ressure a lied to the lock u
clutch and controls lock±up timing.
 
13O/D OFF Indicator Light
Blinks and warns the driver, while the O/D main switch is
pushed in when the electronic control circuit is malfunction 
 
13O/D OFF Indicator Lightpushed in, when the electronic control circuit is malfunction-
ing.
 
14Kick down SwitchDetects if the accelerator pedal is depressed beyond the 14Kick±down SwitchDetects if the accelerator edal is de ressed beyond the
full throttle valve opening position.
 
15A/T Fluid Temp SensorDetects the A/T fluid temp 15A/T Fluid Temp. SensorDetects the A/T fluid temp.
± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONOPERATIONAT1±11

RECOMMENDED TOOLS
09082±00050 TOYTOA Electrical Tester Set
EQUIPMENT
 
 Vernier calipers 
 Check torque converter clutch
installation.
 
Dial indicator with magnetic baseCheck drive plate runout. Dial indicator with magnetic baseCheck drive late runout.
 
 Straight edgeCheck torque converter clutch
installation.
 
To rque wrench Torque wrench
LUBRICANT
 Item Capacity Classification
 Automatic transmission fluid
Dry fill7 2 liter (7 6 US qts 6 3 lmpqts)ATF DEXRON[II 
 
Dry fill
Drain and refill
7.2 liter (7.6 US qts, 6.3 lmp.qts)
1.6 liter (1.7 US qts, 1.4 lmp.qts)
ATF DEXRON[ II
SSM (SPECIAL SERVICE MATERIALS)
 
 
 
088260±0090 
 
 
Seal Packing 1281.
THREE BOND 1281 or equivalent
(FIPG) 
 
 
Transmission X Oil pan
± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONPREPARATIONAT1±13

ON±VEHICLE REPAIR
NO.1 VEHICLE SPEED SENSOR
ASSEMBLY REPLACEMENT
1. DISCONNECT NO.1 VEHICLE SPEED SENSOR
CONNECTOR
2. REMOVE NO.1 VEHICLE SPEED SENSOR ASSEMBLY
(a) Remove the bolt and No.1 vehicle speed sensor assembly.
(b) Remove the speedometer driven gear from the No.1 vehicle
speed sensor.
(c) Remove the O±ring from the No.1 vehicle speed sensor.
3. INSTALL NO.1 VEHICLE SPEED SENSOR ASSEMBLY
(a) Coat a new O±ring with A/T fluid and install it to the No.1
vehicle speed sensor.
(b) Install the speedometer driven gear to the No.1 vehicle
speed sensor.
(c) Install the No.1 vehicle speed sensor to the extension
housing and torque the bolt.
Torque: 16 NVm (160 kgfVcm, 12 ftVlbf)
4. CONNECT NO.1 VEHICLE SPEED SENSOR
CONNECTOR
NO.2 VEHICLE SPEED SENSOR
REPLACEMENT
1. DISCONNECT NO.2 VEHICLE SPEED SENSOR
CONNECTOR
2. REMOVE NO.2 VEHICLE SPEED SENSOR
(a) Remove the bolt and No.2 vehicle speed sensor.
(b) Remove the O±ring.
3. INSTALL NO.2 VEHICLE SPEED SENSOR
(a) Coat a new O±ring with A/T fluid and install it to the No.2
vehicle speed sensor.
(b) Install the No.2 vehicle speed sensor to the extension
housing and torque the bolt.
Torque: 5.4 NVm (55 kgfVcm, 48 in.Vlbf)
4. CONNECT NO.2 VEHICLE SPEED SENSOR
CONNECTOR AT1±14
± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONON±VEHICLE REPAIR

PARK/NEUTRAL POSITION SWITCH
REPLACEMENT
1. REMOVE FRONT EXHAUST PIPE
(See page EG±83)
2. DISCONNECT PARK/NEUTRAL POSITION SWITCH
CONNECTOR
3. REMOVE PARK/NEUTRAL POSITION SWITCH
(a) Remove the control shaft lever.
(b) Pry off the lock washer and remove the nut.
(c) Remove the bolt and pull out the park/neutral position switch.
4. INSTALL AND ADJUST PARK/NEUTRAL POSITION
SWITCH
5. CONNECT PARK/NEUTRAL POSITION SWITCH
CONNECTOR
6. INSTALL FRONT EXHAUST PIPE
(See page EG±127)
A/T FLUID TEMP. SENSOR
REPLACEMENT
1. DISCONNECT A/T FLUID TEMP. SENSOR CONNECTOR
2. REMOVE A/T FLUID TEMP. SENSOR
(a) Remove the A/T fluid temp. sensor.
(b) Remove the O±ring.
3. INSTALL A/T FLUID TEMP. SENSOR
(a) Coat a new O±ring with A/T fluid and install it to the A/T fluid
temp. sensor.
(b) Install the A/T fluid temp. sensor.
VTorque: 15 NVm (150 kgfVcm, 11 ftVlbf)
4. CONNECT A/T FLUID TEMP. SENSOR CONNECTOR
KICK±DOWN SWITCH REPLACEMENT
1. REMOVAL OF KICK±DOWN SWITCH
(a) Remove the 3 bolts and kick±down switch.
(b) Disconnect the kick±down switch connector.
2. INSTALLATION OF KICK±DOWN SWITCH
(a) Connect the kick±down switch connector.
(b) Install the kick±down switch and 3 bolts.
± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONON±VEHICLE REPAIRAT1±15

VALVE BODY REMOVAL
Installation is in the reverse order of removal.
INSTALLATION HINT: After installation, fill A/T fluid and
check fluid level. (See page AT1±42)
1. RAISE VEHICLE AND CLEAN TRANSMISSION
EXTERIOR
To prevent contamination, clean the exterior of the transmis-
sion.
2. DRAIN TRANSMISSION
Remove the drain plug and drain fluid into a suitable contain-
er.
Torque: 20 NVm (205 kgfVcm, 15 ftVlbf)
3. REMOVE OIL PAN
REMOVAL NOTICE: Some fluid will remain in the oil pan.
(a) Remove the 19 bolts.
Torque: 7.4 NVm (75 kgfVcm, 65 in.Vlbf)
(b) Install the blade of SST between the transmission case and
oil pan, cut off applied sealer and then remove the oil pan.
SST 09032±00100
REMOVAL NOTICE: When removing the oil pan, be care-
ful not to damage the oil pan flange.
INSTALLATION HINT:
w Remove any packing material and be careful not to drop
oil on the contacting surfaces of the oil pan and
transmission case.
w Clean contacting surfaces of any residual packing
material using gasoline or alcohol.
w Apply FIPG to the oil pan.
FIPG:
Part No. 08826±00090, THREE BOND 1281 or equivalent
w Install the oil pan within 10 minutes after applying FIPG. AT1±16
± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONON±VEHICLE REPAIR

4. WHEN REPLACING 3 SOLENOIDS
(a) Disconnect the connectors from the solenoids.
(b) Remove the solenoid mounting bolts.
Torque: 10 NVm (100 kgfVcm, 7 ftVlbf)
(c) Remove the solenoids.
5. REMOVE OIL STRAINER
REMOVAL NOTICE: Be careful as some fluid will come
out with the oil strainer.
Remove the 3 bolts, and the oil strainer and gasket.
Torque: 10 NVm (100 kgfVcm, 7 ftVlbf)
INSTALLATION HINT: If necessary, replace the strainer or
case gasket.
6. REMOVE OIL PIPES
Pry up both pipe ends with a large screwdriver and remove
the 2 pipes.
INSTALLATION NOTICE: Make sure that the oil pipes or
the magnets do not interfere with the oil pan.
± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONON±VEHICLE REPAIRAT1±17

2. REMOVE VALVE BODY
(See page AT1±16)
3. PUSH THROTTLE CABLE OUT OF TRANSMISSION
CASE
Remove the retaining bolt and pull out the throttle cable.
4. INSTALL THROTTLE CABLE
Install the retaining bolt and push in the throttle cable.
5. INSTALL VALVE BODY
(See page AT1±16)
6. IF THROTTLE CABLE IS NEW, STAKE STOPPER ON
INNER CABLE
(a) Pull in the slack of the inner cable.
(b) Stake the stopper, as shown, 0±1 mm (0±0.04 in.) from the
end of outer cable.
OIL SEAL REPLACEMENT
1. RAISE VEHICLE AND POSITION PAN TO CATCH ANY
FLUID THAT MAY DRIP
2. REMOVE PROPELLER SHAFT TOGETHER WITH
CENTER BEARING
3. REMOVE REAR OIL SEAL
NOTICE: Clean the extension housing before removing
the oil seal.
Using SST, remove the oil seal.
SST 09308±10010
4. INSTALL NEW OIL SEAL
Using SST and a hammer, drive in a new oil seal as far as it
will go.
SST 09325±40010
5. INSTALL PROPELLER SHAFT
6. LOWER VEHICLE AND CHECK FLUID LEVEL
(See page AT1±42)
Add fluid as necessary.
NOTICE: Do not overfill.
Fluid type:
ATF DEXRON[ II
AT1±20± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONON±VEHICLE REPAIR

EXTENSION HOUSING REMOVAL
Installation is in the reverse order of removal.
INSTALLATION HINT: After installation, fill A/T fluid and
check fluid lever. (See page AT1±42)
1. RAISE VEHICLE AND POSITION PAN TO CATCH ANY
FLUID THAT MAY DRIP
2. REMOVE PROPELLER SHAFT TOGETHER WITH
CENTER BEARING.
3. DISCONNECT NO. 1 AND NO. 2 VEHICLE SPEED
SENSOR CONNECTORS AND REMOVE SENSORS
4. REMOVE SPEEDOMETER DRIVEN GEAR
5. JACK UP TRANSMISSION SLIGHTLY
Securely support the transmission on a transmission jack.
Lift the transmission slightly to remove weight from the rear
support member.
6. REMOVE REAR SUPPORT MEMBER
Remove the 4 bolts, nuts and support member.
Torque: 25 NVm (260 kgfVcm, 19 ftVlbf)
7. REMOVE TRANSMISSION MOUNTING BRACKET
Remove the 4 bolts and bracket from the transmission.
Torque: 25 NVm (250 kgfVcm, 18 ftVlbf)
8. REMOVE EXTENSION HOUSING AND GASKET
Remove the 6 bolts. If necessary, tap the extension housing
with a plastic hammer or block of wood to loosen it.
INSTALLATION HINT: The 2 lower bolts are shorter.
Torque: 36 NVm (370 kgfVcm, 27 ftVlbf)
± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONON±VEHICLE REPAIRAT1±21

TRANSMISSION REMOVAL
Installation is in the reverse order of removal.
INSTALLATION HINT: After installation, fill A/T fluid and
check fluid level. (See page AT1±42)
1. REMOVE A/T FLUID LEVEL GAUGE
2. REMOVE FILLER PIPE
Remove the bolt and pipe.
3. DISCONNECT THROTTLE CABLE
4. REMOVE EXHAUST PIPE
(See page EG±83)
5. REMOVE HEAT INSULATOR
Remove the 4 nuts and the heat insulator.
Torque: 5.4 NVm (55 kgfVcm, 48 in.Vlbf)
± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONASSEMBLY REMOVAL AND INSTALLATIONAT1±23