1995 TOYOTA SUPRA sensor

 VSV for EVAP Resistance at 20°C (68°F) 30±34

 VSV for EGR Resistance at 20°C (68°F) 30±34

 
 
 
 
 
ECT sensor 
 
 
 
 
Resistance at ±20°C (±4°F)
at 0°C (32°F)
at 20°C (68°F)
at 40°C (104°F)
at 60°C (140°F)
at 80°C (176°F) 
 
 
 
 
10±20 k

4±7 k

2±3 k

0.9±1.3 k

0.4±0.7 k

0.2±0.4 k

 
 
 
EGR gas
temperature
sensor 
 
 
Resistance at 50°C (122°F)
at 100°C (212°F)
at 150°C (302°F) 
 
 
64±97 k

11±16 k

2±4 k

 Main heated
oxygen sensor Heater coil resistance at 20°C (68°F) 11±16

 
 Sub heated
oxygen sensor 
 Heater coil resistance at 20°C (68°F) 
 11±16

 Fuel cut rpm Fuel return rpm 1,100 rpm
TORQUE SPECIFICATIONS
 Part tightened NVm kgfVcm ftVlbf
Fuel line for union bolt2930022 for flare nut 30 310 22 Fuel pressure regulator x Delivery pipe 8.8 90 78 in.Vlbf Delivery pipe x Intake manifold 21 210 15 Injector holder x Delivery pipe 7.8 80 69 in.Vlbf Fuel inlet pipe x Delivery pipe 41 420 30 Fuel return pipe x Fuel pressure regulator 27 280 20 Air intake chamber x Intake manifold 27 280 20 Manifold stay x Air intake chamber 39 400 29
 Manifold stay x Cylinder head 39 400 29
 EGR pipe x Cylinder head 27 270 20
 EGR pipe x EGR valve 64 650 47
 Control cable bracket x Air intake chamber 19 195 14
 Air intake chamber stay x Intake manifold 19 195 14
 Air intake chamber stay x Control cable bracket 19 195 14
 
 
Fuel pressure pulsation damper x Fuel pipe support
for SST 
 
41
35 
 
420
350 
 
30
25
 Fuel tank band x Body 39 400 29
 MAF meter x Air cleaner case 6.9 70 61 in.Vlbf
Throttle body x Air intake chamber2121015 
IAC valve x Air intake chamber
 
21
 
210
 
15 
EGR gas temperature sensor x EGR valve
 
20
 
200
 
14 Knock sensor x Cylinder block 44 450 33 Main heated oxygen sensor x Exhaust manifold 20 200 14 Sub heated oxygen sensor x Center exhaust pipe 20 200 14 
 Upper front crossmember extension x Front suspension Bolt
Nut 
 29
33 
 300
340 
 22
25
 
 
Front lower arm bracket stay x Front suspension Bolt
Nut 
 
44
59 
 
450
600 
 
33
43
EG±328± ENGINESFI SYSTEM (2JZ±GTE)

Check 2.
Check that there is continuity between the ECU terminal GND and
body ground.

Open circuit in wire harness between the ECU terminal
GND and body ground.

Body ground faulty.
Check 3.
(a) Jack up one of the rear wheels.
(b) Connect a voltmeter between the ECU connector terminals
SPD and GND.
(c) Spin the rear wheel and check that the meter needle deflects
0 V " 5 V or more " 0 V.
Check 4.
Check that there is no continuity between terminals SOL (+) or
SOL (±) and GND.

Open or short circuit in wire harness between the ECU
terminal SPD and speed sensor.

Speed sensor faulty (See BE section.)

Short circuit in wire harness between the terminals
SOL (+) and SOL (±).

Solenoid valve faulty. SR±48
± STEERINGELECTRONIC CONTROL SYSTEM

GENERAL DESCRIPTION
The SUPRA is equipped with an SRS (Supplemental Restraint System), which comprises a driver
airbag, and front passenger airbag if fitted. Failure to carry out service operations in the correct
sequence could cause the SRS to unexpectedly deploy during servicing, possibly leading to a seri-
ous accident. Further, if a mistake is made in servicing the SRS, it is possible the SRS may fail to
operate when required. Before performing servicing (including removal or installation of parts, in-
spection or replacement), be sure to read the following items carefully, then follow the correct pro-
cedure described in the repair manual.
1. Malfunction symptoms of the SRS are difficult to confirm, so the diagnostic trouble codes become the most
important source of information when troubleshooting. When troubleshooting the SRS, always inspect the
diagnostic trouble codes before disconnecting the battery.
(See page RS±44)
2. Work must be started after 90 seconds from the time the ignition switch is turned to the ºLOCKº
position and the negative (±) terminal cable is disconnected from the battery.
(The SRS is equipped with a back±up power source so that if work is started within 90 seconds of
disconnecting the negative (±) terminal cable from the battery, the SRS may deploy.)
When the negative (±) terminal cable is disconnected from the battery, memory of the clock and audio sys-
tems will be canceled. So before starting work, make a record of the contents memorized by the audio
memory system. When work is finished, reset the audio systems as before and adjust the clock. To avoid
erasing the memory of each memory system, never use a back±up power supply from outside the vehicle.
3. Even in cases of a minor collision where the SRS does not deploy, the steering wheel pad, front passenger
airbag assembly, front airbag sensors and center airbag sensor assembly should be inspected.
(See pages RS±10, 20, 30, and 33)
4. Never use SRS parts from another vehicle. When replacing parts, replace them with new parts.
5. Before repairs, remove the airbag sensors if shocks are likely to be applied to the sensors during repairs.
6. Never disassemble and repair the steering wheel pad, front passenger airbag assembly, front airbag
sensors or center airbag sensor assembly in order to reuse it.
7. If the steering wheel pad, front passenger airbag assembly, front airbag sensors or center airbag sensor
assembly have been dropped, or if there are cracks, dents or other defects in the case, bracket or
connector, replace them with new ones.
8. Do not expose the steering wheel pad, front passenger airbag assembly, front airbag sensors or center
airbag sensor assembly directly to hot air or flames.
9. Use a volt/ohmmeter with high impedance (10 k
/V minimum) for troubleshooting the system's electrical
circuits.
10. Information labels are attached to the periphery of the SRS components. Follow the instructions on the
notices.
11. After work on the SRS is completed, check the SRS warning light.
(See page RS±44)
12. If the vehicle is equipped with a mobile communication system, refer to the precaution in the IN section. RS±2
± SUPPLEMENTAL RESTRAINT SYSTEMGENERAL DESCRIPTION

OPERATION
FUNCTION OF COMPONENTS
1. STEERING WHEEL PAD (with AIRBAG)
The inflater and bag of the SRS are stored in the steering
wheel pad and cannot be disassembled. The inflater con-
tains a squib, igniter charge, gas generant, etc., and inflates
the bag when instructed by the center airbag sensor assem-
bly.
2. SPIRAL CABLE (in COMBINATION SWITCH)
A spiral cable is used as an electrical joint from the vehicle
body side to the steering wheel.
3. FRONT PASSENGER AIRBAG ASSEMBLY
The inflater and bag of the SRS are stored in the front pas-
senger airbag assembly and cannot be disassembled.
The inflater contains a squib, igniter charge, gas generant,
etc., and inflates the bag when instructed by the center airbag
sensor assembly.
4. SRS WARNING LIGHT
The SRS warning light is located on the cluster finish panel.
It goes on to alert the driver of trouble in the system when a
malfunction is detected in the center airbag sensor assembly.
In normal operating conditions when the ignition switch is
turned to the ACC or ON position, the light goes on for about
6 seconds and then goes off.
5. FRONT AIRBAG SENSOR
A front airbag sensor is mounted inside each of the front fend-
ers. The sensor unit is a mechanical type. When the sensor
detects a deceleration force above a predetermined limit,
contacts is made in the sensor, sending a signal to the center
airbag sensor assembly. The sensor cannot be disas-
sembled. RS±4
± SUPPLEMENTAL RESTRAINT SYSTEMOPERATION

6. CENTER AIRBAG SENSOR ASSEMBLY
The center airbag sensor assembly is mounted on the floor
inside the console box. The center airbag sensor assembly
consists of a center airbag sensor, safing sensor, diagnosis
circuit and ignition control, drive circuit, etc. It receives signals
from the airbag sensors and judges whether the SRS must
be activated or not.
7. SRS CONNECTORS
 No. Item Application 
 (1)
 
  Terminal Twin±Lock Mechanism
 
  Connectors (1), (2), (3), (4), (5), (6), (7)
 (2)  Airbag Activation Prevention Mechanism  Connectors (1), (4), (5), (6)
 (3)  Electrical Connection Check Mechanism  Connectors (1), (2), (3)
 (4)  Connector Twin±Lock Mechanism  Connectors (4), (5), (6)
All connectors in the SRS are colored yellow to distinguish
them from other connectors. Connectors having special func-
tions and specifically designed for SRS are used in the loca-
tions shown below to ensure high reliability. These connec-
tors use durable gold±plated terminals.
± SUPPLEMENTAL RESTRAINT SYSTEMOPERATIONRS±5

When the vehicle is involved in a frontal collision in the
hatched area (Fig. 1) and the shock is larger than a predeter-
mined level, the SRS is activated automatically. A safing sen-
sor is designed to go on at a smaller deceleration rate than
the front and center airbag sensors. As illustrated in Fig. 2,
ignition is caused when current flows to the squib, which hap-
pens when a safing sensor and a front airbag sensor and/or
the center airbag sensor go on simultaneously. When a de-
celeration force acts on the sensors, two squibs in the driver
airbag and front passenger airbag ignite and generate gas.
The gas discharging into the driver and front passenger air-
bags rapidly increases the pressure inside the bags, break-
ing open the steering wheel pad and instrument panel door.
Bag inflation then ends, and the bags deflate as the gas is
discharged through discharge holes at the bag's rear or side. RS±8
± SUPPLEMENTAL RESTRAINT SYSTEMOPERATION

PREPARATION
SST (SPECIAL SERVICE TOOLS)
SRS Airbag Deployment Tool
Diagnosis Check Wire
Puller C SetSteering wheel
RECOMMENDED TOOLS
Torx Socket T30
Torx Socket T40
TOYOTA Electrical Tester Set
Steering wheel pad
Center airbag sensor assembly
EQUIPMENT
 
 Torque wrench 
 
 
 Bolt: Length: 35 mm (1.38 in.) Pitch: 1.0 mm (0.039 in.)
Diam.: 6.0 mm (0.236 in.) 
 Airbag disposal
 
 
Tire Width: 185 mm (7.28 in.) Inner diam.: 360mm (14.17 in.) 
 
Airbag disposal
 
 
Tire with disc wheel Width: 185 mm (7.28 in.)
Inner diam.: 360 mm (14.17 in.) 
 
Airbag disposal
 
 
Vinyl bag 
 
Airbag disposal
± SUPPLEMENTAL RESTRAINT SYSTEMPREPARATIONRS±9

FRONT AIRBAG SENSOR
INSPECTION ITEMS
1. VEHICLES NOT INVOLVED IN A COLLISION
Do a diagnostic system check. (See page RS±44)
2. VEHICLES INVOLVED IN A COLLISION
(a) Do a diagnostic system check.
(See page RS±44)
(b) If the front fender of the car or its periphery is damaged, do
a visual check for damage to the front airbag sensor, which
includes the following items even if the airbag was not
deployed:
wBracket deformation
wPeeling of paint from the bracket
wCracks, dents or chips in the case
wCracks and dents in, or chipping and scratches of the
connector
wPeeling off of the label or damage to the series number
Also refer to the body dimension drawings in the BODY sec-
tion and check the dimensions around where the front airbag
sensors are mounted.
(The SRS may malfunction, or may not work, if the body area
is not repaired or replaced correctly.)
REPLACEMENT REQUIREMENTS
In the following cases, replace the front airbag sensor.
wIf the SRS has been deployed in a collision.
(Replace both the left and right airbag sensors.)
wIf the front airbag sensor has been found to be faulty in
troubleshooting.
wIf the front airbag sensor has been found to be faulty
during the check in item 2±(b).
wIf the front airbag sensor has been dropped.
NOTICE: For replacement of the front airbag sensor, see
page RS±31, ºFRONT AIRBAG SENSOR REMOVAL AND
INSTALLATIONº and be sure to follow the correct proce-
dure. RS±30
± SUPPLEMENTAL RESTRAINT SYSTEMFRONT AIRBAG SENSOR