1995 TOYOTA SUPRA engine

The No.3 solenoid valve is provided for lock±up operations. The
lock±up operation pressure is controlled by the linear solenoid for
smooth engagement.
The amount of current flow to the solenoid is controlled by the duty
ratio (See page AT2±75) of ECM output signal. The higher the duty
ratio becomes, the higher the lock±up hydraulic pressure becomes
during the lock±up operation. If the malfunction occurs in this cir-
cuit and diagnostic trouble code 64 is stored in memory, but the
O/D OFF indicator light does not blink.
Diagnostic Code Detection ConditionDTC No.Trouble Area
64

No.3 solenoid valve

Harness or connector between No.3
solenoid valve and ECM

ECMAll conditions below are detected for 1 sec. or
more. (2 trips detection logic)*
(a) ECM outputs duty signal to No.3 solenoid in
90% or higher duty ratio.
(b) Current to No.3 solenoid:
450 + 100 mA or less.
*: See page AT2±58


Waveform between terminals SLN±
and E1 when engine is idling.

Waveform between terminals SLN±
and E1 during shift change.
CIRCUIT DESCRIPTION
DTC 64 No. 3 Solenoid Valve Circuit (For Lock±up Control Pressure
Modulation)
± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONTROUBLESHOOTINGAT2±85

DTC No.Trouble Area
67

O/D direct clutch speed sensor

Harness or connector between O/D direct
clutch speed sensor and ECM

ECMAll conditions below are detected for 4 secs. or
more.
(2 trips detection logic)*
(a) Gear position: 1st, 2nd or 3rd
(b) T/M input shaft rpm: 1000 rpm or more
(c) T/M output shaft rpm: Less than 300 rpm
(d) NSW OFF (other than P or N position)
Diagnostic Trouble Code Detection Condition

*: See page AT2±58

Waveform between terminals NCO+ and NCO± during engine idling.
This sensor detects the rotation speed of the O/D input shaft
from the rotation of the O/D direct clutch drum.
Its construction is the same as that of the No.2 vehicle speed
sensor (See page AT2±79).
By comparing the O/D direct clutch speed signal and the No.2
vehicle speed sensor signal, the ECM detects the shift timing
of the gears and appropriately controls the engine torque and
hydraulic pressure in response to various conditions, thus
performing smooth gear shift.O/D Direct Clutch Drum
O/D Direct Clutch
Speed Sensor
CIRCUIT DESCRIPTION
DTC 67 O D Direct Clutch Speed Sensor Circuit
± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONTROUBLESHOOTINGAT2±89

DTC 77 No.5 Solenoid Valve Circuit (For Line Pressure Modulation)
CIRCUIT DESCRIPTION
The throttle pressure that is applied to the primary regulator valve (which modulates line pressure) causes the
No.5 solenoid valve, under electronic control, to precisely and minutely modulate and generate line pressure
according to the accelerator pedal effort, or engine power output detected. This reduces the fluctuation of line
pressure and provides smooth shifting characteristics.
Upon receiving the throttle valve opening angle signal, ECM controls the line pressure by sending a predeter-
mined duty ratio to the No.5 solenoid valve located in the valve body, activating the solenoid valve, modulating
the line pressure, generating throttle pressure.
 DTC No. Diagnostic Trouble Code Detection Condition Trouble Area
 
 
 
 
77
 
 
 
 
Any of condition below are detected. (2 trip
detection logic)

SLT
± terminal: 0 V or 5 V for 1 sec. or more.
 
 
 
 

No.5 solenoid valve

Harness or connector between No.5
solenoid valve and ECM

ECM
AT2±92± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONTROUBLESHOOTING

Stop Light Switch Circuit
CIRCUIT DESCRIPTION
The purpose of this circuit is to prevent the engine from stalling, while driving in lock±up condition, when
brakes are suddenly applied.
When the brake pedal is operated, this switch sends a signal to the ECM. Then the ECM cancels operation
of the lock±up clutch while braking is in progress.
± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONTROUBLESHOOTINGAT2±103

SERVICE SPECIFICATIONS
SERVICE DATA
 





Line pressure (wheel locked) Engine idling
D position
R position
AT stall
D position
R position 
 
 
 
 
471±530 kPa 4.8±5.4 kgf/cm2 68±77 psi
686±785 kPa 7.0±8.0 kgf/cm
2 100±114 psi
1,334±1,470 kPa 13.6±15.0 kgf/cm
2 193±213 psi
1,697±2,030 kPa 17.3±20.7 kgf/cm
2 246±294 psi Engine stall revolution D and R position 2,600 +150 rpm 


Time lag N "D position
N "R positionposition 
 Less than 1.2 seconds
Less than 1.5 seconds
 


Engine idle speed
(In N position and air conditioner OFF) 
 650 +50 rpm
 


Drive plate runout Max.
Torque converter clutch runout Max. 
 
0.20 mm 0.0079 in.
0.1 mm 0.004 in.
SHIFT POINT
NORM Mode
Shift positionShifting pointVehicle 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"3
 
 
 
 
 
 
 
62±72 (39±45)
120±129 (75±80)
187±201 (116±125)
181±195 (112±121)
109±117 (68±73)
41±47 (25±29)
29±34 (18±25)
23±28 (14±17)
 
 
 2
 
 
 
Throttle valve fully opened 1"2
*3"2
2"1 
 
 
62±72 (39±45)
135±147 (84±91)
41±47 (25±29)
 L Throttle valve fully opened *2"1 60±66 (37±41)
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"3 
 
 
 
 
122±131 (76±81)
194±207 (121±129)
187±201 (116±125)
109±117 (68±73)
181±195 (112±121)
23±28 (14±17)
 2 Throttle valve fully opened *3"2 135±147 (84±91)
 L Throttle valve fully opened *2"1 60±66 (37±41)
* Shift points is the same when the throttle valve is closed as when the throttle valve is opened. AT2±116
± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONSERVICE SPECIFICATIONS

LOCK±UP POINT
NORM Mode
 D position Throttle valve opening 5% Lock±up ON km/h (mph) Lock±up OFF km/h (mph)
 3rd Gear 60±66 (37±41) 50±56 (31±35)
 O/D Gear 53±59 (33±37) 50±56 (31±35)
MANU Mode
 D position Throttle valve opening 5% Lock±up ON km/h (mph) Lock±up OFF km/h (mph) 
2nd Gear (2 position) 
60±66 (37±41) 
57±63 (35±39) 
 3rd Gear (D position)
 
 60±66 (37±41)
 
 57±63 (35±39)
 O/D Gear (D position) 181±195 (112±121) 69±76 (43±47)
HINT:
(1) There is no lock±up in the L positions.
(2) In the following cases, the lock±up will be released regardless of the lock±up pattern.
wWhen the throttle valve is completely closed.
wWhen the brake light switch is ON.
(3) Shift up to 3rd will not occur when the engine coolant temp. is below 35°C (95°F) and the vehicle
speed is below 40 km/h (25 mph).
(4) Shift±up to O/D will not occur when the engine coolant temp. is below 60°C (140°F) and the vehicle
speed is below 60 km/h (37 mph).
(5) When the vehicle speed drops to 10 km/h (6 mph) or more below the cruise control set vehicle speed,
shift down from O/D to 3rd occurs.
± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONSERVICE SPECIFICATIONSAT2±117

TORQUE SPECIFICATIONS
 Part tightened NVm kgfVcm ftVlbf
 No.1 vehicle speed sensor 16 160 12
 No.2 vehicle speed sensor 5.4 55 48 in.Vlbf
 O/D direct clutch speed sensor 5.4 55 48 in.Vlbf
 A/T fluid temp. sensor 15 150 11 Valve body 10 100 7 Oil strainer 10 100 7 
 Oil pan
 
 7.4
 
 75
 
 65 in.Vlbf
 Starter 37 380 27
 Rear support X Body 25 260 19
 Torque converter X Drive plate 34 340 25
 Oil cooler union nut 34 350 25
 Oil cooler pipe bracket 10 100 7
 Propeller shaft X Transmission 56 570 41 Propeller shaft X Differential 79 805 58 
 Propeller shaft center support
 
 49
 
 500
 
 36
 Propeller shaft adjusting nut 53 540 39
 Oil pan drain plug 17 175 13
 Drive plate X Torque converter 33 340 25
 Drive plate X Crankshaft 64 650 47
 
 
Transmission X Engine block 14 mm bolt
17 mm bolt 
 
37
72 
 
380
730 
 
27
53
 Park/neutral position switch X Transmission case 16 160 12
 Transmission output flange 123 1,250 90
 Shift control rod X Shift lever 13 130 9 Shift control rod X Park/neutral position switch 16 160 12 
 Exhaust pipe bracket X Transmission housing
 
 37
 
 380
 
 27
 No.2 exhaust pipe X Center exhaust pipe 58 590 43
 Rear center floor crossmember brace X Body 13 130 9
 Heat insulator X Body 5.4 55 48 in.Vlbf
AT2±118± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONSERVICE SPECIFICATIONS

PREPARATION
SST (SPECIAL SERVICE TOOLS)
09843±18020Diagnosis Check Wire
09808±14010Fuel Sender Gauge Tool Assy
09950±50010Puller C Set
RECOMMENDED TOOLS
09082±00050TOYOTA Electrical Tester Set


EQUIPMENT
 
 Voltmeter
 
 
 Ammeter 
 Ohmmeter 
 Test lead 
 Thermometer Engine oil level warning switch, Seat heater
 Syphon Brake fluid level warning switch
 Oil bath Engine oil level warning switch
 Bulb (3.4 W) Fuel sender gauge, Seat belt warning relay Bulb (21 W) Turn signal flasher relay Dry cell battery Fuel sender gauge 
 Heat light
 
 Seat heater
 Torque wrench 
 Masking tape Rear window defogger wire
 Tin foil Rear window defogger wire
SSM (SPECIAL SERVICE MATERIAL)
 

DuPont Paste No. 4817 or
equivalent
 

Rear window defogger
 
 
equivalent 
 
± BODY ELECTRICAL SYSTEMPREPARATIONBE±3