1995 TOYOTA SUPRA sensor

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

 
 Fuel cut rpm
 
 Fuel return rpm
 
 1,400 rpm
TORQUE SPECIFICATIONS
 Part tightened NVm kgfVcm ftVlbf
 
 
Fuel line for union bolt
for flare nut 
 
29
30 
 
300
310 
 
22
22
 Fuel pressure regulator x Delivery pipe 8.8 90 78 in.Vlbf
 Delivery pipe x Intake manifold 21 210 15
 Actuator for ACIS x Air intake chamber 6.8 70 61 in.Vlbf
 Fuel inlet pipe x Delivery pipe 41 420 30 Fuel return pipe x Fuel pressure regulator 27 280 20 Air intake chamber stay x Cylinder head 18 185 13 
Air intake chamber stay x Air intake chamber
 
18
 
185
 
13 
Intake air connector x Air intake chamber
 
27
 
270
 
20 
 Throttle body bracket x Throttle body
 
 21
 
 210
 
 15
 Throttle body bracket x Cylinder head 21 210 15
 No.2 vacuum pipe x Intake manifold 27 270 20
 EGR pipe x Cylinder head 27 270 20
 EGR pipe x EGR valve 64 650 47
 
 
Fuel pressure pulsation damper x Fuel pipe support
for SST 
 
41
35 
 
420
350 
 
30
25
 Starter x Transmission 39 400 29
 Fuel tank band x Body 39 400 29 VAF meter x Air cleaner case 10 100 7 Throttle body x Intake air connector 21 210 15 
Vacuum tank x Intake manifold
 
21
 
210
 
15 
Brake booster union x Air intake chamber
 
29
 
300
 
22 
 Air intake chamber x Intake manifold
 
 27
 
 270
 
 20
 EGR gas temperature sensor x EGR valve 20 200 14
 Knock sensor x Cylinder block 44 450 33
 Oxygen sensor (Except California) x Exhaust manifold 20 200 14
 Main heated oxygen sensor (California) x Exhaust manifold 44 450 33
 Sub heated oxygen sensor (California only) x Center exhaust pipe 20 200 14
± ENGINESFI SYSTEM (2JZ±GE)EG±257

SFI SYSTEM (2JZ±GTE)
PREPARATION
SST (SPECIAL SERVICE TOOLS)
09205±76030 Cylinder Head Setting Bolt
Tightening Adaptor
09268±41045Injection Measuring Tool Set
(09268±41070)No.4 Union
(90405±09015)No.1 Union
09268±45012 EFI Fuel Pressure Gauge
ECT sensor
09612±24014 Steering Gear Housing Overhaul
Tool Set
(09617±24011) Steering Rack Wrench
09631±22020 Power Steering Hose Nut
14 x 17 mm Wrench Set
09808±14010Fuel Sender Gauge Tool Assy
09816±30010 Oil Pressure Switch Socket
09842±30080 Wiring ªEº EFI Inspection
Knock sensor
Fuel pressure pulsation damper
09843±18020 Diagnosis Check Wire
Injector
Fuel line flare nut
EG±258± ENGINESFI SYSTEM (2JZ±GTE)

PRECAUTION
1. Before working on the fuel system, disconnect the
negative (±) terminal cable from the battery.
HINT: Any diagnostic trouble code retained by the computer
will be erased when the negative (±) terminal cable is discon-
nected.
Therefore, if necessary, read the diagnosis before discon-
necting the negative (±) terminal cable from the battery.
2. Do not smoke or work near an open flame when working
on the fuel system.
3. Keep gasoline away from rubber or leather parts.
MAINTENANCE PRECAUTIONS
1. PRECAUTION WHEN CONNECTING GAUGE
(a) Use ba tte ry as th e po we r so u rce fo r th e timin g lig h t,
tachometer, etc.
(b) Connect the tester probe of a tachometer to the terminal IG

of the DLC1.
2. IN EVENT OF ENGINE MISFIRE, FOLLOWING
PRECAUTIONS SHOULD BE TAKEN
(a) Check proper connection of battery terminals, etc.
(b) After repair work, check that the ignition coil terminals and all
other ignition system lines are reconnected securely.
(c) When cleaning the engine compartment, be especially
careful to protect the electrical system from water.
3. PRECAUTIONS WHEN HANDLING OXYGEN SENSOR
(a) Do not allow oxygen sensor to drop or hit against an object.
(b) Do not allow the sensor to come into contact with water. EG±260
± ENGINESFI SYSTEM (2JZ±GTE)

INJECTORS REMOVAL
Installation is in the reverse order of removal.
1. REMOVE ENGINE UNDER COVER
2. REMOVE THROTTLE BODY
(See throttle body removal)
3. REMOVE OIL DIPSTICK AND GUIDE FOR A/T
(a) Remove the bolt.
(b) Pull out the dipstick guide together with the dipstick.
INSTALLATION HINT: Apply soapy water to the O±ring, and
push in the dipstick guide.
(c) Remove the O±ring from the dipstick guide.
INSTALLATION HINT: Use a new O±ring.
4. REMOVE OIL DIPSTICK AND GUIDE FOR ENGINE
(a) Disconnect the fuel return hose from the clamp of the dipstick
guide.
(b) Remove the bolt.
(c) Pull out the dipstick guide together with the dipstick.
INSTALLATION HINT: Apply soapy water to the O±ring, and
push in the dipstick guide.
(d) Remove the O±ring from the dipstick guide.
INSTALLATION HINT: Use a new O±ring.
5. REMOVE AIR INTAKE CHAMBER STAY
Remove the bolt, nut and chamber stay.
Torque: 19 NVm (195 kgfVcm, 14 ftVlbf)
6. DISCONNECT CONTROL CABLE BRACKET FROM AIR
INTAKE CHAMBER
Remove the 2 bolts, and disconnect the cable bracket from
the air intake chamber.
Torque: 19 NVm (195 kgfVcm, 14 ftVlbf)
7. DISCONNECT CONNECTORS AND HOSES
(a) Disconnect these connectors:
(1) IAC valve connector
(2) Turbo pressure sensor connector
(3) VSV connector for fuel pressure control
(4) VSV connector for EGR
(b) Remove the bolt, and disconnect the engine wire protector
from the body.
± ENGINESFI SYSTEM (2JZ±GTE)EG±275

(c) Disconnect these hoses:
(1) Air hose from IAC valve
Disconnect the IAC valve pipe from the clamp on the cyl-
inder head cover, and disconnect the air hose from the
IAC valve.
(2) Air hose (from air intake chamber) from vacuum pipe on
IAC valve pipe
(3) Air hose for EGR from valve pipe
(4) PCV hose from PCV valve
(5) Vacuum sensing hose from fuel pressure regulator
(6) Water bypass hose (from IAC valve) from No.4 water by-
pass pipe
(7) EVAP hose (from air intake chamber) from vacuum pipe
on manifold stay
(8) EVAP hose (from vacuum pipe on No.4 water bypass
pipe) from No.2 vacuum pipe
(9) EVAP hose (from charcoal canister) from No.2 vacuum
pipe
(10) PS air hose from air intake chamber
(11) Brake booster vacuum hose from union on air intake
chamber
8. DISCONNECT EGR GAS TEMPERATURE SENSOR
CONNECTOR
(a) Disconnect the connector from the No.2 vacuum pipe.
(b) Disconnect the sensor connector from the wiring connector.
9. REMOVE EGR PIPE
(a) Remove the union bolt holding the EGR pipe to the EGR
valve.
Torque: 64 NVm (650 kgfVcm, 47 ftVlbf)
(b) Remove the 2 bolts, EGR pipe and gasket.
INSTALLATION HINT: Use a new gasket.
Torque: 27 NVm (270 kgfVcm, 20 ftVlbf)
10. REMOVE NO.4 WATER BYPASS PIPE
Remove the 2 bolts and water bypass pipe.
11. REMOVE MANIFOLD STAY
Remove the 2 bolts and manifold stay.
Torque: 39 NVm (400 kgfVcm, 29 ftVlbf)
EG±276± ENGINESFI SYSTEM (2JZ±GTE)

12. REMOVE AIR INTAKE CHAMBER ASSEMBLY
(a) Remove the bolt, and disconnect the ground cable from the
intake manifold.
(b) Remove the 2 bolts holding the engine wire protector to the
intake manifold.
(c) Disconnect the 2 clamps of the engine wire protector from the
brackets.
(d) Remove the 5 bolts, 2 nuts and engine wire bracket, and
disconnect the air intake chamber assembly from the intake
manifold.
INSTALLATION HINT: Uniformly tighten the bolts and nuts in
several passes.
Torque: 27 NVm (280 kgfVcm, 20 ftVlbf)
(e) Disconnect the water bypass hose from the IAC valve.
(f) Remove the gasket.
INSTALLATION HINT: Use a new gasket.
13. DISCONNECT WIRE CLAMPS AND CONNECTORS
Disconnect these connectors and clamps:
(1) 6 injectors connectors
INSTALLATION HINT: The No.1, No.3 and No.5 injector con-
nectors are dark gray, and the No.2, No.4 and No.6 injector
connectors are gray.
(2) 2 camshaft position sensor connectors
(3) 3 engine wire clamps from injector holders
14. DISCONNECT FUEL INLET PIPE FROM DELIVERY PIPE
Remove the union bolt and 2 gaskets, and disconnect the in-
let pipe from the delivery pipe.
INSTALLATION HINT: Use 2 new gaskets.
Torque: 41 NVm (420 kgfVcm, 30 ftVlbf)
CAUTION:
wPut a shop towel under the delivery pipe.
wSlowly loosen the union bolt.
± ENGINESFI SYSTEM (2JZ±GTE)EG±277

THROTTLE BODY REMOVAL
Installation is in the reverse order of removal.
1. DRAIN ENGINE COOLANT
2. REMOVE THROTTLE BODY
(a) Disconnect the hose, cables and connectors from the throttle
body:
(1) Air hose
(2) Accelerator cable
(3) Cruise control actuator cable
(4) Throttle position sensor connector
(5) Sub±throttle position sensor connector
(6) Sub±throttle actuator connector
(b) Remove the 2 bolts and 2 nuts, and disconnect the throttle
body from the air intake chamber.
Torque: 21 NVm (210 kgfVcm, 15 ftVlbf)
(c) Remove the gasket.
INSTALLATION HINT: Use a new gasket.
(d) Disconnect these hoses from the throttle body, and remove
the throttle body:
(1) EVAP hose
(2) Water bypass hose (from No.4 water bypass pipe)
(3) Water bypass hose (from cylinder head)
(4) PS air hose
THROTTLE BODY INSPECTION
Throttle Body
1. CLEAN THROTTLE BODY
(a) Using a soft brush and carburetor cleaner, clean the cast
parts.
(b) Using compressed air, clean all the passages and apertures.
NOTICE: To prevent deterioration, do not clean the throttle
position sensors, actuator, dashpot and throttle opener.
2. INSPECT THROTTLE VALVE
(a) Disconnect the throttle opener vacuum hose from the throttle
body.
(b) Apply vacuum to the throttle opener.
(c) Check that there is no clearance between the throttle stop
screw and throttle lever when the throttle valve is fully closed.
(d) Reconnect the vacuum hose to the throttle body.
± ENGINESFI SYSTEM (2JZ±GTE)EG±291

Throttle Position Sensor
1. INSPECT THROTTLE POSITION SENSOR
(a) Disconnect the throttle opener vacuum hose from the throttle
body.
(b) Apply vacuum to the throttle opener.
(c) Insert a 0.54 mm (0.021 in.) or 0.70 mm (0.028 in.) feeler
gauge between the throttle stop screw and stop lever.
(d) Using an ohmmeter, measure the resistance between each
terminal.
 
 
Clearance between
lever and stop screw 
 Between terminals 
 Resistance
 0 mm (0 in.) VTA±E2 0.34±6.3

 0.54 mm (0.021 in.) IDL±E2 0.5 k
or less 0.70 mm (0.028 in.) IDL±E2 Infinity 
 
 
Throttle valve fully
Open
 
 
 
VTA±E2
 
 
 
2.4±11.2 k

 ± VC±E2 3.1±7.2 k

2. IF NECESSARY, ADJUST THROTTLE POSITION
SENSOR
(a) Loosen the 2 set screws of the sensor.
(b) Insert a 0.65 mm (0.026 in.) feeler gauge between the throttle
stop screw and stop lever.
(c) Connect the tester probe of an ohmmeter to the terminals IDL
and E2 of the sensor. EG±292
± ENGINESFI SYSTEM (2JZ±GTE)