1995 TOYOTA SUPRA wheel

INTRODUCTIONGENERAL REPAIR INSTRUCTIONS -
IN-5
the specified seal lock adhesive to the bolt, nut or
threads.
(c) Precoated parts are indicated in the component il-
lustrations by the º
º symbol.
7. When necessary, use a sealer on gaskets to prevent
leaks.
8. Carefully observe all specifications for bolt tightening
torques. Always use a torque wrench.
9. Use of special service tools (SST) and special service ma-
terials (SSM) may be required, depending on the nature
of the repair. Be sure to use SST and SSM where speci-
fied and follow the proper work procedure. A list of SST
and SSM can be found at the preparation of AT section.
10. When replacing fuses, be sure the new fuse has the cor-
rect amperage rating. DO NOT exceed the rating or use
one with a lower rating.
11. To pull apart electrical connectors, pull on the connector
itself, not the wires.
12. Care must be taken when jacking up and supporting the
vehicle. Be sure to lift and support the vehicle at the prop-
er locations.
(a) If the vehicle is to be jacked up only at the front or
rear end, be sure to block the wheels at the opposite
end in order to ensure safety.
(b) After the vehicle is jacked up, be sure to support it on
stands. It is extremely dangerous to do any work on
a vehicle raised on a jack alone, even for a small job
that can be finished quickly.

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

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

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

STANDARD VALUE OF ECM TERMINAL
* A = (E10), B = (E9) 
 Terminals
 
 Symbols
 
 Wiring
Color 
 Condition
 
 Standard
Value
 B76 ± B69 NSW±E1 B±WeBR IG ON Shift Lever; P or N position Below 3 V
 B76 ± B69 NSW ± E1 B±W eBR IG ON Shift Lever; Other than P or N position 9 ± 14 V
 B3 ± B23 SP2± ± SP2+ G eR IG OFF 560 ± 680

IG OFF10 ± 16
 B10 ± B69 S1 ± E1 W±R eBR Vehicle driving in 2nd gear position 9 ± 14
    IG ON 9 ± 14
    IG OFF 10 ± 16

 B9 ± B69 S2 ± E1 RL eBR Vehicle driving in 2nd or 3rd position 9 ± 14

    IG ON  Below 1.5 V
 B43 ± B65 VTA1±E2 YeBR±B IG ON Accel. pedal is not depressed Below 0.8 V
 B43 ± B65 VTA1 ± E2 Y eBR±B IG ON Accel. pedal is fully depressed 3.2 ± 4.9 V
B64 ± B65IDL1 ± E2ReBR±BIG ONAccel. pedal is not depressedBelow 3 V B64 ± B65 IDL1 ± E2 R eBR±B IG ON Accel. pedal is depressed 9 ± 14 V 
 A2 ± B65
 
 SP1 ± E2
 
 P eBR±B
 
 Ignition switch ON
Turn the rear wheel slowly 
 Repeat 0±8V
or above
 
A3 ± B69
 
KD±E1
 
YeBR
 
IG ON
 Kick±down SW; OFF
(Accel. pedal is not depressed) 9 ± 14 V
 
 
A3 ± B69 
 
KD ± E1 
 
Y eBR 
 
IG ON 
 Kick±down SW; ON
(Accel. pedal is fully depressed) 
 Below 3 V
 A9 ± B69 2±E1 LG±ReBR IG ON Shift Position; 2 position 7.5 ± 14 V
 A9 ± B69 2 ± E1 LG±R eBR IG ON Shift Position; Other than 2 position Below 1.5 V
 A10 ± B69 L±E1 G±BeBR IG ON Shift Position; L position 7.5 ± 14 V

A10 ± B69

L ± E1

G±B eBR

IG ON
Shift Position; Other than L positionBelow 1.5 V A12 ± B69 OD1 ± E1 BR±B eBR Ignition switch ON 4.5 ± 5.5 V 
A18 ± B69
 
M±E1
 
G±YeBR
 
IG ON
 Pattern select SW: MANU 7.5 ± 14 V
 A18 ± B69 M ± E1 G±Y eBR IG ON Pattern select SW: NORM Below 1.5 V
 A28 ± B69 OD2±E1 V±GeBR IG ON O/D main SW; ON 7.5 ± 14 V
 A28 ± B69 OD2 ± E1 V±G eBR IG ON O/D main SW; OFF Below 3 V
 B24 ± B65 OIL ± E2 BR±B eO A/T fluid temperature 110°C (230°F) Below 1 V
AT1±56± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONTROUBLESHOOTING

INSPECTION PROCEDURE
Shift the shift lever to N position.
Jack up one of the rear wheels.
Connect the Check Harness A
(See page EG±404)
Disconnect power steering ECU connector
and cruise control ECU connector.
Turn ignition switch ON.
Measure voltage between terminal SP1 of ECM
connector and body ground when the wheel is
turned slowly.
Check voltage between terminal SP1 of ECM connector and body ground.
Voltage is generated intermittently.
Check and replace ECM.
Repair or replace harness or connector be-
tween ECM and telltale light RH.
Check operation of odometer and trip meter (telltale light RH (See page
BR±48))
AT1±67± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONTROUBLESHOOTING

SERVICE SPECIFICATIONS
SERVICE DATA
 Line pressure (wheel locked) Engine idling   
 D position 363±422 kPa 3.7±4.3 kgf/cm2 53±61 psi
 R position 500±598 kPa 5.1±6.1 kgf/cm2 73±88 psi
 AT stall (Throttle valve fully opened) 
 D position 902±1,147 kPa 9.2±11.7 kgf/cm2 131±166 psi
 R position 1,236±1,589 kPa 12.6±16.2 kgf/cm2 179±230 psi
 Engine stall revolution (D and R position) 2,200+150 rpm
 
 
Time lag N " D position
N " R position 
 
Less than 1.2 seconds
Less than 1.5 seconds
 
 
Engine idle speed
(In N position and air conditioner OFF) 
 
700+50 rpm 
 
 Throttle cable adjustment Between boot and face and inner cable stopper
 (Throttle valve fully closed) 0±1 mm 0±0.04 in.
 Drive plate runout Max 0.20 mm 0.0079 in.
 Torque converter clutch runout Max 0.30 mm 0.0118 in.
SHIFT POINT
NORM Mode
 Shift Position Shifting Point Vehicle speed km/h (mph)
 
 
 
 
 
 
 
D
Throttle valve fully opened 1"2
2"3
3"O/D
O/D"3
3"2
2"1
Throttle valve fully closed 3"O/D
O/D"353±62 (33±39)
104±112 (65±70)
163±175 (101±109)
157±169 (98±105)
98±105 (61±65)
42±48 (26±30)
34±39 (21±24)
20±25 (12±16)
 
 
 
2
Throttle valve fully opened 1"2
* 3"2
2"153±62 (33±39)
121±132 (75±82)
42±48 (26±330)
 LThrottle valve fully opened * 2"148±53 (30±33)
MANU Mode
 Shift Position Shifting Point Vehicle speed km/h (mph)
 
 
 
 
 
D
Throttle valve fully opened 2"3
3"O/D
O/D"3
3"2
Throttle valve fully closed 3"O/D
O/D"3104±112 (65±70)
163±175 (101±109)
157±169 (98±109)
98±105 (61±65)
163±175 (101±109)
20±25 (12±16)
 2Throttle valve fully opened * 3"2121±132 (75±82) 
 LThrottle valve fully opened * 2"148±53 (30±33)
AT1±96± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONSERVICE SPECIFICATIONS

MECHANICAL SYSTEM TESTS
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±805C (122±1765F).
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) Fully apply the parking brake.
(c) Connect a tachometer to the engine.
(d) Start the engine and check idle.
(e) Keep you foot pressed firmly on the brake pedal.
(f) Shift into the D position. Fully depress the accelerator pedal.
Quickly read the stall speed.
Stall speed:
2,600+150 rpm
(g) Do the same test in R position.
Quickly read the stall speed.
Stall speed:
2,600+150 rpm
AT2±44± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONTROUBLESHOOTING