sensor TOYOTA SUPRA 1986 Service Repair Manual
[x] Cancel search | Manufacturer: TOYOTA, Model Year: 1986, Model line: SUPRA, Model: TOYOTA SUPRA 1986Pages: 878, PDF Size: 20 MB
Page 5 of 878
TURBOCHARGER
On±Vehicle Inspection
1. INSPECT INTAKE AIR SYSTEM
Check for leakage or clogging between the air cleaner and
turbocharger inlet and between the turbocharger outlet and
cylinder head.
wClogged air cleaner .... Clean or replace air filter
wHoses collapsed or deformed .... Repair or replace
wLeakage from connections .... Check each
connection and repair
wCracks in components Check and replace
2. INSPECT EXHAUST SYSTEM
Check for leakage or clogging between the cylinder head and
turbocharger inlet and between the turbocharger outlet and
exhaust pipe.
wDeformed components Repair or replace
wForeign material in passages Remove
wLeakage from components Repair or replace
wCracks in components Check and replace
3. INSPECT EXHAUST EXHAUST GAS CONTROL VALVE
OPERATION
(a) Disconnect the air hose from the actuator.
(b) Using SST, apply approx. 49 kPa (0.50 kgf/cm
2, 7.1 psi) of
pressure to the actuator.
SST 09992±00241
(c) Check that the actuator push rod moves.
(d) Reconnect the air hose to the actuator.
If operation is not as specified, replace the control valve as-
sembly.
4. INSPECT TURBOCHARGING PRESSURE
(a) Using a 3±way connector, connect SST (turbocharger
pressure gauge) to the hose between the gas filter and turbo
pressure sensor.
SST 09992±00241
(b) While driving with the engine running at 5,600 rpm or more
with the throttle valve fully open in the 1st gear/ L range,
check the turbocharging pressure.
Standard pressure:
61±75 kPa (0.62±0.76 kgf/cm
2, 8.8±10.8 psi)
If the pressure is less than that specified, check the intake
and exhaust systems for leakage. If there is no leakage, re-
place the turbocharger assembly.
If the pressure is above specification, check if the actuator
hose is disconnected or cracked. If not, replace the turbo-
charger assembly. EG±144
± ENGINETURBOCHARGER SYSTEM (2JZ±GTE)
Page 6 of 878
VSV for Intake Air Control Valve
(See SFI System)
VSV for Waste Gate Valve
(See SFI System)
VSV for Exhaust Gas Control Valve
(See SFI System)
VSV for Exhaust Bypass Valve
(See SFI System)
Turbo Pressure Sensor
(See SFI System)
± ENGINETURBOCHARGER SYSTEM (2JZ±GTE)EG±145
Page 14 of 878
17. REMOVE VSV ASSEMBLY
(a) Disconnect these hoses:
(1) Air hose from actuator for waste gate valve
(2) Air hose from actuator for exhaust gas control valve
(3) Air hose from hose clamp
(4) Engine wire from wire clamp
(b) Remove the 2 bolts.
(c) Disconnect the 2 VSV connectors, and remove the VSV
assembly.
18. REMOVE AIR TUBES AND INTAKE AIR CONNECTOR
(a) Disconnect the connector and hoses:
(1) Crankshaft position sensor connector from clamp
(2) Water bypass hose (from water pump) from No.1 turbo
water pipe
(3) Water bypass hose (from water outlet) from No.1 turbo
water pipe
(4) Water bypass hose (from water outlet) from No.2 turbo
water pipe
(b) Remove the bolt, and disconnect the No.2 turbo water pipe
from the No.4 air tube.
(c) Remove the 2 bolts, and disconnect the No.1 air tube from
the No.1 turbocharger. Remove the gasket.
INSTALLATION HINT: Use a new gasket.
Torque: 21 NVm (210 kgfVcm, 15 ftVlbf)
(d) Remove the 2 bolts holding the No.4 air tube to the No.1
turbocharger. Remove the gasket.
INSTALLATION HINT: Use a new gasket.
Torque: 21 NVm (210 kgfVcm, 15 ftVlbf)
(e) Disconnect these hoses, and remove the No.4 air tube and
air bypass valve assembly.
(1) Air hose from No.4 air tube
(2) Air hose from intake air connector
± ENGINETURBOCHARGER SYSTEM (2JZ±GTE)EG±153
Page 16 of 878
23. REMOVE MAIN HEATED OXYGEN SENSOR
(a) Disconnect the oxygen sensor connector.
(b) Remove the 2 nuts, oxygen sensor and gasket.
INSTALLATION HINT: Use a new gasket and 2 new nuts.
Torque: 20 NVm (200 kgfVcm, 14 ftVlbf)
24. REMOVE EXHAUST GAS CONTROL VALVE
Remove the 3 nuts, control valve and 2 gaskets.
NOTICE: The control valve is ceramic. Do not drop or knock
the control valve.
INSTALLATION HINT: Use 2 new gaskets and 3 new nuts.
Torque: 69 NVm (700 kgfVcm, 51 ftVlbf)
25. REMOVE NO.1 TURBOCHARGER STAY
Remove the bolt, nut and turbocharger stay.
Torque: 43 NVm (440 kgfVcm, 32 ftVlbf)
26. REMOVE NO.2 TURBOCHARGER STAY
Remove the bolt, nut and turbocharger stay.
INSTALLATION HINT: Install the turbocharger stay and No.1
turbo oil pipe clamp with the bolt and nut.
Torque: 43 NVm (440 kgfVcm, 32 ftVlbf)
27. REMOVE NO.1 TURBO OIL PIPE
(a) Remove the union bolt holding the turbo oil pipe to the
cylinder block. Remove the 2 gaskets.
INSTALLATION HINT: Use 2 new gaskets.
Torque: 39 NVm (400 kgfVcm, 29 ftVlbf)
(b) Remove the 2 nuts, and disconnect the turbo oil pipe from
turbocharger. Remove the gasket.
INSTALLATION HINT:
wUse a new gasket.
wAlign the oil holes of the gasket and turbocharger
housing.
Torque: 21 NVm (210 kgfVcm, 15 ftVlbf)
(c) Disconnect the turbo oil hose from the turbo oil outlet on the
No.1 oil pan, and remove the turbo oil pipe.
28. REMOVE NO.2 TURBO OIL PIPE
(a) Remove the union bolt holding the turbo oil pipe to the
cylinder block. Remove the 2 gaskets.
INSTALLATION HINT: Use 2 new gaskets.
Torque: 39 NVm (400 kgfVcm, 29 ftVlbf)
± ENGINETURBOCHARGER SYSTEM (2JZ±GTE)EG±155
Page 23 of 878
SERVICE SPECIFICATIONS
SERVICE DATA
Turbocharger
Turbocharging pressure
Impeller wheel axial play Limit
Impeller wheel radial play Limit
61±75 kPa (0.62±0.76 kgf/cm2, 8.8±10.8 psi)
0.162 mm (0.0064 in.)
0.110 mm (0.0045 in.)
TORQUE SPECIFICATIONS
Part tightened
NVm
kgfVcm
ftVlbf
Turbocharger x Turbine outlet elbow 25 250 18
Turbo water pipe x Turbocharger 8.8 90 78 in.Vlbf
Side bearing housing plate x Turbocharger 8.8 90 78 in.Vlbf
No.2 air tube x No.2 turbocharger 21 210 15
Turbocharger x Exhaust manifold
54
550
40
Turbo oil pipe x Turbocharger 21 210 15
Turbo oil pipe x Cylinder block 39 400 29
Turbocharger stay x Turbocharger 43 440 32
Turbocharger stay x Cylinder block
43
440
32
Exhaust gas control valve x Turbine outlet elbow 69 700 51
Main heated oxygen sensor x Exhaust gas control valve 20 200 14
Exhaust gas control valve stay x Exhaust gas control valve 43 440 32
Exhaust gas control valve stay x Cylinder block
43
440
32
Exhaust bypass pipe x Turbine outlet elbow 25 250 18
Exhaust bypass pipe x Exhaust gas control valve 25 250 18
Intake air control valve x No.2 turbocharger 21 210 15
No.4 air tube x No.1 turbocharger
21
210
15
No.1 air tube x No.1 turbocharger
21
210
15
No.2 front exhaust pipe x Exhaust gas control valve 62 630 46
Front exhaust pipe x No.2 front exhaust pipe 58 590 43
Pipe support bracket x Transmission 43 440 32
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
CAC duct x CAC 4.9 50 43 in.Vlbf
CAC x Body 13 135 10
EG±162± ENGINETURBOCHARGER SYSTEM (2JZ±GTE)
Page 27 of 878
DIAGNOSIS SYSTEM
DESCRIPTION
The ECM contains a built±in self±diagnosis system by which
troubles with the engine signal network are detected and a Mal-
function Indicator Lamp on the instrument panel lights up.
By analyzing various signals as shown in a later table (See page
EG±494) the Engine Control Module (ECM) detects system mal-
functions relating to the sensors or actuators.
In the normal mode, the self±diagnosis system monitors 19 items,
indicated by code No. as shown in EG±494. A malfunction indica-
tor lamp informs the driver that a malfunction has been detected.
The lamp goes off automatically when the malfunction has been
repaired, but the diagnostic trouble code(s) remains stored in the
ECM memory (except for code Nos. 16 and 53). The ECM stores
the code(s) until it is cleared by removing the EFI No. 1 fuse with
the ignition switch OFF.
The diagnostic trouble code can be read by the number of blinks
of the malfunction indicator lamp when TE1 and E1 terminals on
the data link connector 1 or 2 are connected. When 2 or more
codes are indicated, the lowest number (code) will appear first.
In the test mode, 13 items, indicated by code No. as shown in
EG±494 are monitored. If a malfunction is detected in any one of
the systems indicated by code Nos. 13, 21, 22, 24, 25, 26, 27, 35,
41, 47, 71 and 78 the ECM lights the malfunction indicator lamp
to warn the technician that a malfunction has been detected. In
this case, TE2 and E1 terminals on the data link connector 2
should be connected as shown later. (See page EG±492).
In the test mode, even if the malfunction is corrected, the malfunc-
tion code is stored in the ECM memory even when the ignition
switch OFF (except code Nos. 43 and 51). The also applies in the
normal mode. The diagnostic trouble mode (normal or test) and
the output of the malfunction indicator lamp can be selected by
connecting the TE1, TE2 and E1 terminals on the data link con-
nector 2, as shown later.
A test mode function has been added to the functions of the self±
diagnosis system of the normal mode for the purpose of detecting
malfunctions such as poor contact, which are difficult to detect in
the normal mode. This function fills up the self±diagnosis system.
The test mode can be implemented by the technician following the
appropriate procedures of check terminal connection and opera-
tion described later. (See page EG±492) EG±490
± ENGINE2JZ±GTE ENGINE TROUBLESHOOTING
Page 29 of 878
Diagnosis Inspection (Test Mode)
Compared to the normal mode, the test mode has an in-
creased sensing ability to detect malfunctions.
It can also detect malfunctions in the starter signal circuit, the
IDL contact signal of the throttle position sensor, air condi-
tioning signal and park/neutral position switch signal.
Furthermore, the same diagnostic items which are detected
in the normal mode can also be detected in the test mode.
DIAGNOSTIC TROUBLE CODE CHECK
1. Initial conditions.
(a) Battery voltage 11 V or more
(b) Throttle valve fully closed
(c) Transmission in neutral position
(d) Air conditioning switched OFF
2. Turn ignition switch OFF
3. Using SST, connect terminals TE2 and E1 of the data link
connector 2.
SST 09843±18020
4. Turn ignition switch ON.
HINT:
wTo confirm that the test mode is operating, check that the
malfunction indicator lamp flashes when the ignition
switch is turned to ON.
wIf the malfunction indicator lamp does not flash, proceed
to troubleshooting of the TE2 terminal circuit on page
EG±598.
5. Start the engine.
6. Simulate the conditions of the malfunction described by the
customer.
7. After the road test, using SST, connect terminals TE1 and E1
of the data link connector 2.
SST 09843±18020
8. Read the diagnostic trouble code on malfunction indicator
lamp on the telltale light RH (See page EG±491).
9. After completing the check, disconnect terminals TE1, TE2
and E1, and turn off the display.
HINT:
wThe test mode will not start if terminals TE2 and E1 are
connected after the ignition switch is turned ON.
wWhen the engine is not cranked, diagnostic trouble
codes º43º (Starter signal) output, but this is not
abnormal.
wWhen the automatic transmission shift lever is in the ºDº,
º2º, ºLº or ºRº shift position, or when the air conditioning
is on or when the accelerator pedal is depressed, code
º51º (Switch condition signal) is output, but this is not
abnormal. EG±492
± ENGINE2JZ±GTE ENGINE TROUBLESHOOTING
Page 32 of 878
If a malfunction code is displayed during the diagnostic trouble code check in test mode, check the circuit for
that code listed in the table below (Proceed to the page given for that circuit).
Trouble Area
Malfunction
Indicator
Lamp*
1
Memory*2
See page
Trouble Area
Normal
Mode
Test
Mode
Memory
See page
±
±
±
±
±
Open or short in crankshaft position sensor, camshaft
position sensor No.1, No.2 circuit
Crankshaft position sensor
Camshaft position sensor No.1, No.2
Starter
ECM
ON
N.A.
EG±515
Open or short in crankshaft position sensor circuit
Crankshaft position sensor
ECM
ON
N.A.
Open or short in crankshaft position sensor circuit
Mechanical system malfunction (skipping teeth of
timing belt, belt stretched)
Crankshaft position sensor
ECM
N.A.
ON
EG±518
Mechanical system malfunction (skipping teeth of
timing belt, belt stretched)
Camshaft position sensor No.1, No.2
ECM
ON
N.A.
Open or short in IGF circuit from igniter to ECM
Igniter
ECM
ON
N.A.
EG±519
ECM
ON
N.A.
X
EG±524
*1, 2: See page EG±502.
± ENGINE2JZ±GTE ENGINE TROUBLESHOOTINGEG±495
Page 33 of 878
DTC
No.
Number of
MIL BlinksCircuitDiagnostic Trouble Code Detecting Condition
(1) Open or short in heater circuit of main heated oxygen
sensor (Fr) for 0.5 sec. or more.
(2) Main heated oxygen sensor (Fr) signal voltage is reduced to
between 0.35 V and 0.70 V for 90 sec. under conditions
Main Heated
Oxygen Sensor
Signal(a) ~ (d):
(2 trip dectection logic)*3
(a) Engine coolant temp.: Between 80°C (176°F) and
95°C (203°F)
(b) Engine speed: 1,500 rpm or more
(c) Load driving (Example A/T in Overdrive, (5th for
M/T), A/C ON, Flat road, 80 km/h (50 mph)
(d) Main heated oxygen sensor signal voltage:
Alternating above and below 0.45 V
Open or short in engine coolant temp. sensor circuit for 0.5
sec. or more
Open or short in intake air temp. sensor circuit for 0.5 sec.
or more
(1) Main heated oxygen sensor voltage is 0.45 V or less (lean)
for 90 sec. under conditions (a) and (b):
(2 trip dectection logic)*3
(a) Engine speed: 1,500 rpm or more
(b) Engine coolant temp.: 70°C or more
(a) Engine speed: Below 950 rpm
(b) Engine coolant temp.: 80°C (176°F) or more
(2 trip dectection logic)*4
(2) Engine speed varies by more than 20 rpm over the preced±
ing crank angle period during a period of 20 sec. or more
under conditions (a) and (b):
Intake Air
Temp. Sensor
Signal
Engine Coolant
Temp. Sensor
Circuit
Air±Fuel
Ratio Lean
Malfunction
*3: See page EG±503. EG±496
± ENGINE2JZ±GTE ENGINE TROUBLESHOOTING
Page 34 of 878
Trouble Area
Malfunction
Indicator
Lamp*
1
Memory*2
See page
Trouble Area
Normal
Mode
Test
Mode
Memory
See page
Open or short in heater circuit of main heated oxygen
sensor
Main heated oxygen sensor heater
ECM
ON
N.A.
Main heated oxygen sensor circuit
Mi h td
ON
ON
EG±525
Main heated oxygen sensor
ON
ON
Main heated oxygen sensor
Open or short in engine coolant temp. sensor circuit
Engine coolant temp. sensor
ECM
ON
ON
EG±530
Open or short in intake air temp. sensor circuit
Intake air temp. sensor
ECM
ON
ON
EG±532
Open or short in Main heated oxygen sensor circuit
Oen or short in Main heated oxygen sensor circuit
Main heated oxygen sensor
Main heated oxygen sensor
Ignition system
gy
ECM
Open or short in injector circuit
Oen or short in injector circuit
Fuel linepressure (injector leak blockage) ON ON EG 534
Fuel line pressure (injector leak, blockage)
Mechanical system malfunction (skipping teeth ofONONEG±534 Mechanical system malfunction (skipping teeth of
timing belt)
timing belt)
Ignition system
Ignition system
Compression pressure (foreign object caught in valve)
Compression pressure (foreign object caught in valve)
M i fl t (i itk)
Mass air flow meter (air intake)
ECM
ECM
*1, 2: See page EG±502
± ENGINE2JZ±GTE ENGINE TROUBLESHOOTINGEG±497