1986 TOYOTA SUPRA Service Repair Manual

Sub Heated Oxygen Sensor
COMPONENTS FOR REMOVAL AND
INSTALLATION
± ENGINESFI SYSTEM (2JZ±GTE)EG±321

OXYGEN SENSOR INSPECTION
1. INSPECT OPERATION OF SUB HEATED OXYGEN
SENSOR
(See circuit inspection in Engine Troubleshooting)
2. INSPECT HEATER RESISTANCE OF SUB HEATED
OXYGEN SENSOR
(a) Remove the driver's seat.
(b) Take out the console box side of the floor carpet.
(c) Disconnect the oxygen sensor connector.
(d) Using an ohmmeter, measure the resistance between the
terminals +B and HT.
Resistance:
At 20°C (68°F) 11±16

If the resistance is not as specified, replace the sensor.
Torque: 20 NVm (200 kgfVcm, 14 ftVlbf)
(e) Reconnect the oxygen sensor connector.
(f) Reinstall the floor carpet.
(g) Reinstall the driver's seat. EG±322
± ENGINESFI SYSTEM (2JZ±GTE)

FUEL PUMP ECU
COMPONENTS FOR REMOVAL AND
INSTALLATION
FUEL PUMP ECU INSPECTION
1. REMOVE FUEL PUMP ECU
2. INSPECT FUEL PUMP ECU
(See circuit inspection in Engine Troubleshooting)
3. REINSTALL FUEL PUMP ECU
± ENGINESFI SYSTEM (2JZ±GTE)EG±323

ENGINE CONTROL MODULE (ECM)
COMPONENTS FOR REMOVAL AND
INSTALLATION
EG±324± ENGINESFI SYSTEM (2JZ±GTE)

ECM INSPECTION
1. DISCONNECT NEGATIVE (±) TERMINAL CABLE FROM
BATTERY
2. REMOVE SCUFF PLATE
3. REMOVE ECM PROTECTOR
(a) Take out the front side of the floor carpet.
(b) Remove the 2 nuts and ECM protector.
4. REMOVE ECM
(a) Remove the nut, and disconnect the ECM from the floor
panel.
(b) Fully loosen the bolt and disconnect the 2 ECM connectors,
and remove the ECM.
5. INSPECT ECM
(See standard value of ECM terminals in Engine Trouble-
shooting)
6. REINSTALL ECM
(a) Connect the 2 ECM connectors.
wMatch the male connector correctly with the female
connector, then press them together.
wTighten the bolt.
Make sure the connector is completely connected by
tightening the bolt until there is a clearance of less than
1 mm (0.04 in.) between the bottom of the male connec-
tor and the end of the female connector.
(b) Install the ECM with the nut.
7. REINSTALL ECM PROTECTOR
8. REINSTALL SCUFF PLATE
9. RECONNECT NEGATIVE (±) TERMINAL CABLE TO
BATTERY
± ENGINESFI SYSTEM (2JZ±GTE)EG±325

FUEL CUT RPM
FUEL CUT RPM INSPECTION
1. WARM UP ENGINE
Allow the engine to warm up to normal operating tempera-
ture.
2. CONNECT TACHOMETER TO ENGINE
Connect the tester probe of a tachometer to terminal IG
of
the DLC1.
NOTICE:
wNever allow the tachometer terminal to touch ground as
it could result in damage to the igniter and/or ignition
coil.
wAs some tachometers are not compatible with this igni-
tion system, we recommend that you confirm the compat-
ibility of your unit before use.
3. INSPECT FUEL CUTOFF OPERATION
(a) Increase the engine speed to at least 3,000 rpm.
(b) Check for injector operating noise.
(c) Check that when the throttle lever is released, injector
operation noise stops momentarily and then resumes.
HINT: Measure with the A/C OFF.
Fuel return speed:
1,400 rpm
(Vehicle speed less than 25 km/h (16mph), with
brake OFF)
4. DISCONNECT TACHOMETER EG±326
± ENGINESFI SYSTEM (2JZ±GTE)

SERVICE SPECIFICATIONS
SERVICE DATA
 
 Fuel pressure
regulator 
 Fuel pressure at no vacuum 
 226±275 kPa (2.3±2.8 kgf/cm2, 33±40 psi)
 Fuel pump Resistance at 20°C (68°F) 0.1±3.0
 
 
 
 
Injector 
 
 
 
Resistance
Injection volume
Difference between each cylinder
Fuel leakage 
 
 
 
Approx. 1.95

124±144 cm3 (7.6±8.8 cu in.) per 15 sec.
10 cm
3 (0.6 cu in.) or less
One drop or less per minute
 
 
 
 
MAF meter 
 
 
 
Resistance (THA±E2) 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) 
 
 
 
10±20 k

4±7 k

2±3 k

0.9±1.3 k

0.4±0.7 k

 
 
 
Throttle body 
 
 
Throttle body fully closed angle
Dashpot setting speed
Throttle opener setting speed 
 
 
10°
2,300 + 400 rpm
1,500 + 200 rpm
 
 
 
 
 
 
Throttle
position
sensor 
 
 
 
 
 
Clearance between stop screw and lever
0 mm (0 in.) VTA±E2
0.40 mm (0.016 in.) IDL±E2
0.60 mm (0.024 in.) IDL±E2
Throttle valve fully open VTA±E2
± VC±E2 
 
 
 
 
 
0.34±6.3 k

0.5 k
or less
Infinity
2.4±11.2 k

3.1±7.2 k

 
 
 
 
 
Sub±throttle
position
sensor 
 
 
 
 
Clearance between stop screw and lever
0 mm (0 in.) VTA±E2
0.30 mm (0.012 in.) IDL±E2
0.50 mm (0.020 in.) IDL±E2
Throttle valve fully open VTA±E2
± VC±E2 
 
 
 
 
0.3±6.3 k

0.5 k
or less
Infinity
2.0±10.8 k

3.5±6.5 k

 
 
Sub±throttle
actuator 
 
Resistance ACM±A and A±, BCM±B and B± 
 
0.82±0.98

 IAC valve Resistance B1 (or B2)±Others 18±24

 
 
Solenoid
resistor 
 
Resistance +B±Others 
 
Approx. 6

 
 
 
VSV for Fuel
pressure
control 
 
 
Resistance at 20°C (68°F) 
 
 
33±39

 
 
VSV for intake
air control
valve 
 
Resistance at 20°C (68°F) 
 
38.5±44.5

 
 
 
VSV for
exhaust gas
control valve 
 
 
Resistance at 20°C (68°F) 
 
 
38.5±44.5

 
 VSV for waste
gate valve 
 Resistance at 20°C (68°F) 
 22±26

 
 
 
VSV for
exhaust
bypass valve 
 
 
Resistance at 20°C (68°F) 
 
 
22±26

± ENGINESFI SYSTEM (2JZ±GTE)EG±327

 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)