sensor TOYOTA SUPRA 1995 Service Manual Online

TORQUE SPECIFICATIONS
 Part tightened NVm kgfVcm ftVlbf
 Engine block X Transmission 14 mm 37 380 27 
 17 mm
 
 72
 
 730
 
 53
 Rear mounting X Body 25 260 19
 Extension housing X Transmission case 36 370 27
 Valve body X Transmission case 10 100 7 
 Oil strainer
 
 10
 
 100
 
 7
 Oil pan 7.4 75 65 in.Vlbf
 No.1 vehicle speed sensor 16 160 12
 No.2 vehicle speed sensor 5.4 55 48 in.Vlbf 
 Solenoid wiring stopper plate
 
 5.4
 
 55
 
 48 in.Vlbf
 Rear center floor crossmember brace X Body 13 130 9
 Propeller shaft X Differential 79 805 58
 Manual shift linkage X Control shaft lever 13 130 9 Center support bearing X Body 49 500 36 
 Throttle cable X Transmission case
 
 5.4
 
 55
 
 48 in.Vlbf
 Cooler pipe union nut 34 350 25
 Drive plate X Crankshaft 74 750 54
 Torque converter clutch X Drive plate 33 340 25 
 Control shaft lever X Park/Neutral position switch
 
 16
 
 160
 
 12
 A/T fluid temp. sensor 15 150 11
 Drain plug 20 205 15
 Solenoid valve X Valve body 10 100 7 
 Parking lock pawl bracket
 
 7.4
 
 75
 
 65 in.Vlbf
 Transmission mounting bracket X Extension housing 25 250 18
 Heat insulator X Body 5.4 55 48 in.Vlbf
 Starter 37 380 27
AT1±98± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONSERVICE SPECIFICATIONS

ELECTRONIC CONTROL SYSTEM
The electronic control system for the A340E automatic transmission provides extremely precise control of
the gear shift timing and lock±up timing in response to driving conditions as sensed by various sensors
located throughout the vehicle and in response to the engine's running condition.
At the same time, the ECM control reduces vehicle squat when the vehicle starts out and gear shift shock.
The electronic control system is also equipped with a self diagnosis system which diagnoses malfunctions
for the vehicle to continue functioning when a malfunction occurs.
CONSTRUCTION
The electronic control system can be broadly divided onto three groups; the sensors, ECM and actuators.
No. 1 Vehicle Speed Sensor
No. 2 Vehicle Speed Sensor
Crankshaft Position Sensor
Camshaft Position Sensor No.1, No.2
Park/Neutral Position Switch

Neutral Start Signal

Shift lever Position Signal

Idling Signal

Throttle Position Signal
Main (Sub) Ð throttle Position Sensor
Engine Coolant temp. Sensor
A/T Fluid Temp. Sensor
O/D Main Switch
Cruise Control ECU
Kick±Down Switch
Stop Light Switch
Pattern Select Switch
SENSORSECMACTUATORS
No.1 Solenoid Valve
No.2 Solenoid Valve
No.3 Solenoid Valve
No.4 Solenoid Valve
No.5 Solenoid Valve
Engine Torque Control (ESA)
Igniters
Ignition Coils
Distributors
Spark Plugs
O/D OFF Indicator Light
(Diagnostic Trouble Code
Display)
TRAC ECU
O/D Direct Clutch Speed Sensor
± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONOPERATIONAT2±7

ARRANGEMENT OF COMPONENTS
ComponentsFunction 
 Pattern Select Switch
 
 Selects the Power mode or the Normal mode for shift and
lock±up timing.
 
 Crankshaft Position Sensor and Camshaft Position
Sensor 
 Detects the engine speed.
 Park/Neutral Position Switch Detects the shift lever position.
 Stop Light Switch Detects if the brake pedal is depressed.
 Throttle Position Sensor Detects the throttle valve opening angle.
 O/D Main Switch Prevents up±shift to the O/D gear if the O/D switch is off.
 
 
 
Cruise Control ECU
 
 
 
This ECU prevents the transmission from shifting into O/D
and prohibits lock±up control when the vehicle's speed
drops below the cruise control set speed parameter.
 
 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.
AT2±10± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONOPERATION

 O/D Direct Clutch Speed Sensor Detects the input shaft speed from 1st gear to 3rd gear
 Engine Coolant Temp. Sensor Detects the engine coolant temp.
 
 ECM 
 
Controls the engine and transmission actuators based on signals from
each sensor.
 
 No.1 and No.2 Solenoid Valves 
 
Control the hydraulic pressure applied to each shift valve, and control the
gear position and timing.
 
 
 
No.4 Solenoid Valve
(For accumulator back pressure modulation) 
 
 
Controls the hydraulic pressure applied to the back chamber of the accu-
mulator and smoothes the engagement of clutches and brakes during
shifting.
 
 
No.3 Solenoid Valve
(For lock±up control pressure modulation) 
 
Controls the hydraulic pressure applied to the lock±up clutch and controls
lock±up timing.
 
 
No.5 Solenoid Valve
(For line pressure modulation) 
 Controls the line pressure.
 
 O/D OFF Indicator Light 
 
Blinks and warns the driver, while the O/D main switch is pushed in,
when the electronic control circuit is malfunctioning.
 A/T Fluid Temp. Sensor Detects A/T fluid temp.
± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONOPERATIONAT2±11

(b) Install the output flange and 2 washers.
(c) Install and torque a new nut.
Torque: 123 NVm (1.250 kgfVcm, 90 ftVlbf)
HINT: Shift the shift lever to the P position
(d) Using a hammer and chisel, stake the nut.
8. INSTALL PROPELLER SHAFT
(See page PR±13)
9. INSTALL FRONT EXHAUST PIPE AND HEAT INSULATOR
(See page AT2±22)
10. FILL AND CHECK A/T FLUID (See page AT2±42)
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 from it.
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.
Torque: 15 NVm (150 kgfVcm, 11 ftVlbf)
4. CONNECT A/T FLUID TEMP. SENSOR CONNECTOR
± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONON±VEHICLE REPAIRAT2±15

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 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 AT2±16
± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONON±VEHICLE REPAIR

O/D DIRECT CLUTCH SPEED SENSOR
REPLACEMENT
1. DISCONNECT O/D DIRECT CLUTCH SPEED SENSOR
CONNECTOR
2. REMOVE O/D DIRECT CLUTCH SPEED SENSOR
(a) Remove the bolt and O/D direct clutch speed sensor.
(b) Remove the O±ring.
3. INSTALL O/D DIRECT CLUTCH SPEED SENSOR
(a) Coat a new O±ring with A/T fluid and install it to the O/D direct
clutch speed sensor.
(b) Install the O/D direct clutch speed sensor to the transmission
case and torque the bolt.
Torque: 5.4 NVm (55 kgfVcm, 48 in.Vlbf)
4. CONNECT O/D DIRECT CLUTCH SPEED SENSOR
CONNECTOR
PARK/NEUTRAL POSITION SWITCH
REPLACEMENT
1. REMOVE FRONT EXHAUST PIPE
(See page AT2±22)
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 AT2±22)
KICK±DOWN SWITCH REPLACEMENT
1. REMOVE KICK±DOWN SWITCH
(a) Remove the 3 bolts and kick±down switch.
(b) Disconnect the kick±down switch connector.
2. INSTALL KICK±DOWN SWITCH
(a) Connect the kick±down switch connector.
(b) Install the kick±down switch and 3 bolts.
± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONON±VEHICLE REPAIRAT2±17

TRANSMISSION REMOVAL
Installation is in the reverse order of removal.
INSTALLATION HINT: After installation, fill A/T fluid and
check fluid level. (See page AT2±42)
1. REMOVE LEVEL GAUGE
2. REMOVE FILLER PIPE
Remove the bolt and filler pipe.
3. REMOVE ENGINE UNDER COVER
4. DISCONNECT OXYGEN SENSOR
(a) Remove the 2 nuts.
(b) Remove the cover and the sensor.
5. REMOVE EXHAUST PIPE
(a) Remove the 2 nuts and 4 bolts.
(b) Disconnect the rings from the exhaust pipe brackets.
(c) Remove the exhaust pipe, gasket and bracket.
Torque:
Bracket X Transmission housing:
37 NVm (380 kgfVcm, 27 ftVlbf)
No.2 exhaust pipe X Center exhaust pipe:
58 NVm (590 kgfVcm, 43 ftVlbf)
6. REMOVE HEAT INSULATOR
Torque: 5.4 NVm (55 kgfVcm, 48 in.Vlbf)
AT2±22± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONASSEMBLY REMOVAL AND INSTALLATION

7. REMOVE REAR CENTER FLOOR CROSSMEMBER
BRACE
Torque: 13 NVm (130 kgfVcm, 9 ftVlbf)
8. REMOVE PROPELLER SHAFT
(See page PR±7)
9. DISCONNECT SHIFT CONTROL ROD FROM SHIFT
LEVER
Torque: 13 NVm (130 kgfVcm, 9 ftVlbf)
INSTALLATION HINT: Inspect and adjust the park/ neutral
position switch. (See page AT2±43)
10. REMOVE SHIFT CONTROL ROD FROM PARK/NEUTRAL
POSITION SWITCH
Torque: 16 NVm (160 kgfVcm, 12 ftVlbf)
11. DISCONNECT THESE CONNECTORS:
wO/D direct clutch speed sensor
wNo.1 vehicle speed sensor
wNo.2 vehicle speed sensor
wSolenoid wire
wPark/neutral position switch
wA/T fluid temp. sensor
12. D I S C O N N E C T C O N N E C TO R S A N D C A B L E F R O M
STARTER
(a) Remove the nut and disconnect the wire harness.
(b) Disconnect the connectors.
± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONASSEMBLY REMOVAL AND INSTALLATIONAT2±23

CHECK TERMINAL TT OUTPUT
VOLTAGE
When a voltmeter is connected to the DLC2, the following
items can be checked.
1. Throttle position sensor signal
2. Brake signal
3. Shift position signal
1. VOLTMETER CONNECTION
Connect the positive (+) probe of the voltmeter to terminal TT
and the negative (±) probe to terminal E1 of the DLC2.
HINT: If a voltmeter with small internal resistance is used, the
correct voltage will not be indicated, so use a voltmeter with
an internal resistance of at least 10 k
/V.
2. TURN IGNITION SWITCH TO ON (DO NOT START THE
ENGINE)
3. CHECK THROTTLE POSITION SENSOR SIGNAL
Check if the voltage changes from approx. 0 V to approx. 8
V when the accelerator pedal is gradually depressed from the
fully closed position.
4. CHECK BRAKE SIGNAL (LOCK±UP CUT SIGNAL)
(a) Open the throttle valve fully to apply approx. 8 V to terminal
TT.
(b) In this condition, check terminal TT voltage when the brake
pedal is depressed and released.
TT terminal voltage:
0 V (When brake pedal is depressed)
8 V (When brake pedal is released)
5. START ENGINE
6. CHECK SHIFT POSITION SIGNAL
(VEHICLE SPEED ABOVE 10 km/h, 6 mph)
Check up±shifting together with terminal TT voltage.
 Gear Position Terminal TT output voltage 1st Gear 0 V 
 2nd Gear
 
 2 V
 3rd Gear 4 V
 3rd Lock±up 5 V
 O/D 6 V
 O/D Lock±up 7 V
HINT: Check for light shocks from up±shifting and for
changes in the tachometer.
If terminal TT Output voltage check cannot be done, do the
check of TT terminal circuit on page AT2±115. AT2±36
± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONTROUBLESHOOTING