1986 TOYOTA SUPRA brake sensor

(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)

 
 
 
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

Troubleshooting
If the CO/HC concentration does not comply with regulations,
troubleshoot in the order given below.
(a) Check (main heated) oxygen sensors operation.
(See oxygen sensor(s) inspection in SFI System)
(b) See the table below for possible causes, and then inspect
and correct the applicable causes if necessary.
 CO HC Phenomenon Causes
 
 
 
 
 
 
 
 
Normal 
 
 
 
 
 
 
 
High 
 
 
 
 
 
 
 
Rough idle 
 
 
 
 
 
 
 
1. Faulty ignitions:

Incorrect timing

Fouled, shorted or improperly gapped plugs

Open or crossed high±tension cords (2JZ±GE)

Cracked distributor cap (2JZ±GE)
2. Incorrect valve clearance
3. Leaky EGR valve
4. Leaky intake and exhaust valves
5. Leaky cylinder
 
 
 
 
 
 
 
 
Low 
 
 
 
 
 
 
 
High 
 
 
 
 
 
 
 
Rough idle
(Fluctuating HC reading) 
 
 
 
 
 
 
 
1. Vacuum leaks:

PCV hose

EGR valve

Intake manifold

Air intake chamber

Throttle body

IAC valve

Brake booster line
2. Lean mixture causing misfire
 
 
 
 
 
 
 
 
 
 
High 
 
 
 
 
 
 
 
 
 
High 
 
 
 
 
 
 
 
 
 
Rough idle
(Black smoke from exhaust) 
 
 
 
 
 
 
 
 
 
1. Restricted air filter
2. Faulty SFI systems:

Faulty fuel pressure regulator

Clogged fuel return line

Defective ECT switch

Defective turbo pressure sensor (2JZ±GTE)

Faulty ECM

Faulty injector

Faulty throttle position sensor

Faulty VAF meter (2JZ±GE)

Faulty MAF meter (2JZ±GTE)
EG±8± ENGINEENGINE MECHANICAL

CYLINDER HEAD REMOVAL (2JZ±GE)
1. REMOVE ENGINE UNDER COVER
2. DRAIN ENGINE COOLANT
3. REMOVE AIR CLEANER DUCT
4. REMOVE AIR CLEANER, VAF METER AND INTAKE AIR
CONNECTOR PIPE ASSEMBLY
(See step 6 in engine removal in Engine Mechanical)
5. REMOVE DRIVE BELT
Loosen the drive belt tension by turning the drive belt tension-
er clockwise, and remove the drive belt.
6. REMOVE NO.2 FRONT EXHAUST PIPE
(See step 22 in engine removal in Engine Mechanical)
7. REMOVE EXHAUST MANIFOLDS
(a) Except California:
Remove the 4 nuts and manifold heat insulator.
(b) Disconnect the 2 (main heated) oxygen sensor connectors.
(c) Remove the 4 nuts, exhaust manifold and gasket.
Remove the No.1 and No.2 exhaust manifolds.
8. DISCONNECT PS PUMP WITHOUT
DISCONNECTING HOSES
(a) Disconnect these hoses:
(1) Air hose from No.4 timing belt cover
(2) Air hose from air intake chamber
(b) Remove the 2 bolts, and disconnect the pump housing from
the pump bracket.
HINT: Put aside the pump housing, and suspend it.
(c) Remove the 2 bolts and pump rear stay.
9. DISCONNECT BRAKE BOOSTER VACUUM HOSE
10. DISCONNECT EVAP HOSE
11. REMOVE THROTTLE BODY AND INTAKE AIR
CONNECTOR ASSEMBLY
(See injector removal in SFI System)
± ENGINEENGINE MECHANICALEG±41

19. INSTALL WATER BYPASS OUTLET AND NO.1 WATER
BYPASS PIPE
(See step 3 in water pump installation in Cooling System)
20. INSTALL TIMING BELT
(See steps 11 to 17 in timing belt removal)
21. INSTALL SPARK PLUGS
22. INSTALL DISTRIBUTOR AND CORDS ASSEMBLY
(See steps 2, 3 and 5 in distributor installation in Ignition
System)
23. CONNECT HIGH±TENSION CORDS TO CYLINDER HEAD
COVERS
(See step 1 in high±tension cords and cord clamps
installation in Ignition System)
24. INSTALL NO.3 TIMING BELT COVER
25. INSTALL CYLINDER HEAD REAR COVER
26. INSTALL NO.2 VACUUM PIPE AND VSV ASSEMBLY
27. INSTALL AIR INTAKE CHAMBER STAYS
HINT: The No.1 stay is marked with ºFº, and No.2 stay is
marked with ºRº.
(a) Install the No.1 stay with the bolt and nut.
Torque: 18 NVm (185 kgfVcm, 13 ftVlbf)
(a) Install the No.2 stay with the bolt and nut.
Torque: 18 NVm (185 kgfVcm, 13 ftVlbf)
28. I N S TA L L T H R OTTLE BODY AND INTAKE AIR
CONNECTOR ASSEMBLY
(See in injector removal in SFI System)
29. CONNECT EVAP HOSE
30. CONNECT BRAKE BOOSTER VACUUM HOSE
31. INSTALL PS PUMP
(a) Install the pump rear stay with the 2 bolts.
Torque: 39 NVm (400 kgfVcm, 29 ftVlbf)
(b) Install the pump housing with the 2 bolts.
Torque: 58 NVm (590 kgfVcm, 43 ftVlbf)
(c) Connect these hoses:
wAir hose to No.4 timing belt cover
wAir hose to air intake chamber
32. INSTALL EXHAUST MANIFOLDS
(a) Install a new gasket and the exhaust manifold with 4 new
nuts. Install the No.1 and No.2 exhaust manifolds.
Torque: 39 NVm (400 kgfVcm, 29 ftVlbf)
(b) Connect the 2 (main heated) oxygen sensor connectors.
(c) Except California:
Install the manifold heat insulator with the 4 nuts. EG±68
± ENGINEENGINE MECHANICAL

24
ELECTRICAL WIRING ROUTING
Position of Parts in Engine Compartment
[2JZ±GTE]
A 1 A/C Ambient Temp. Sensor E 4 Engine Coolant Temp. Sender (Water Temp. Sender)
A 2 A/C Condenser Fan Motor E 5 Engine Coolant Temp. SW (Water Temp. SW)
A 3 A/C Triple Pressure SW E 6 Engine Hood Courtesy SW
(A/C Dual and Single Pressure SW) E 7 Engine Oil Level Sensor
A 4 A/C Magnetic Clutch and Lock Sensor
A 5 A/T Fluid Temp. Sensor F 1 Front Airbag Sensor LH
A 6 ABS Actuator F 2 Front Airbag Sensor RH
A 7 ABS Actuator F 3 Front Fog Light and Parking Light LH
A 10 ABS Speed Sensor Front LH F 4 Front Fog Light and Parking Light RH
A 11 ABS Speed Sensor Front RH F 5 Front Side Marker Light LH
F 6 Front Side Marker Light RH
B 1 Back±Up Light SW (for M/T) F 7 Front Turn Signal Light LH
B 2 Brake Fluid Level Warning SW F 8 Front Turn Signal Light RH
F 9 Front Wiper Motor
C 1 Camshaft Position Sensor No. 1
C 2 Camshaft Position Sensor No. 2 G 1 Generator (Alternator)
C 3 Crankshaft Position Sensor G 2 Generator (Alternator)
C 4 Cruise Control Actuator
H 1 Headlight Hi LH
D 1 Data Link Connector 1 (Check Connector) H 2 Headlight Hi RH
D 2 Daytime Running Light Relay No. 3 H 3 Headlight Lo LH
D 3 Daytime Running Light Relay No. 3 H 4 Headlight Lo RH
H 5 Heated Oxygen Sensor (Main)
E 1 EGR Gas Temp. Sensor H 8 Horn LH
E 2 Electronically Controlled Transmission Solenoid H 9 Horn RH
E 3 Engine Coolant Temp. Sensor (EFI Water Temp. Sensor)

25
Position of Parts in Engine Compartment
[2JZ±GTE]
I 1 Idle Air Control Valve (ISC Valve) R 1Radiator Fan Motor
I 2 Igniter R 2Radiator Fan Relay No. 1
I 3 Igniter R 3Radiator Fan Relay No. 2
I 6 Ignition Coil No. 1
I 7 Ignition Coil No. 2 S 1 SFI Resistor (EFI Resistor)
I 8 Ignition Coil No. 3 S 2Starter
I 9 Ignition Coil No. 4 S 3Starter
I 10 Ignition Coil No. 5 S 4 Sub Throttle Actuator
I 11 Ignition Coil No. 6 S 5 Sub Throttle Position Sensor
I 12 Injector No. 1
I 13 Injector No. 2 T 1 Theft Deterrent Horn
I 14 Injector No. 3 T 2 Throttle Position Sensor
I 15 Injector No. 4 T 3 Traction Brake Actuator
I 16 Injector No. 5 T 4 Traction Pump and Motor
I 17 Injector No. 6 T 14 Turbo Pressure Sensor
K 1 Knock Sensor (on Front Side) V 2 VSV (for EGR)
K 2 Knock Sensor (on Rear Side) V 3 VSV (for EVAP)
V 4 VSV (for Exhaust Bypass Valve)
M 1 Mass Air Flow (Air Flow Meter) V 5 VSV (for Exhaust Gas Control Valve)
V 6 VSV (for Fuel Pressure Up)
N 1 Noise Filter V 7 VSV (for Intake Air Control Valve)
V 8 VSV (for Waste Gate Valve)
O 1 O/D Direct Clutch Speed Sensor V 10 Vehicle Speed Sensor (Speed Sensor) No. 1 (for
O 2 Oil Pressure SW Combination Meter)
V 11 Vehicle Speed Sensor (Speed Sensor) No. 2 (for
P 1 PPS Solenoid Electronically Controlled Transmission)
P 2 Park/Neutral Position SW (Neutral Start SW),
Back±Up Light SW and A/T Indicator Light SW W 1 Washer Motor
(for A/T)

26
ELECTRICAL WIRING ROUTING
Position of Parts in Engine Compartment
[2JZ±GE]
A 1 A/C Ambient Temp. Sensor E 2 Electronically Controlled Transmission Solenoid
A 3 A/C Dual Pressure SW E 3 Engine Coolant Temp. Sensor (EFI Water Temp.
A 4 A/C Magnetic Clutch and Lock Sensor Sensor)
A 5 A/T Fluid Temp. Sensor E 4 Engine Coolant Temp. Sender (Water Temp.
A 6 ABS Actuator Sender)
A 7 ABS Actuator E 6 Engine Hood Courtesy SW
A 8 ABS Relay E 7 Engine Oil Level Sensor
A 9 ABS Relay
A 10 ABS Speed Sensor Front LH F 1 Front Airbag Sensor LH
A 11 ABS Speed Sensor Front RH F 2 Front Airbag Sensor RH
F 3 Front Fog Light and Parking Light LH
B 1 Back-Up Light SW (for M/T) F 4 Front Fog Light and Parking Light RH
B 2 Brake Fluid Level Warning SW F 5 Front Side Marker Light LH
F 6 Front Side Marker Light RH
C 4 Cruise Control Actuator F 7 Front Turn Signal Light LH
F 8 Front Turn Signal Light RH
D 1 Data Link Connector 1 (Check Connector) F 9 Front Wiper Motor
D 4 Distributor
G 1 Generator (Alternator)
E 1 EGR Gas Temp. Sensor G 2 Generator (Alternator)