Engine mechanical TOYOTA SUPRA 1995 Service Repair Manual

FUNCTION OF ECU
w Control of Shifting Timing
The ECM has programmed into its memory the optimum shift pattern for each shift lever position (D, 2, L
position) and driving mode (Normal or Manual).
Based on the appropriate shift pattern, the ECM turns No.1 and No.2 solenoid valves on or off in accor-
dance with the vehicle speed signal from the vehicle speed sensor and the throttle opening signal from the
throttle position sensor. In this manner, the ECM operates each shift valve, opening or closing the fluid pas-
sages to the clutches and brakes to permit up±shift or down±shift of the transmission.
HINT: The electronic control system provides shift timing and lock±up control only while the vehicle is travel-
ing forward. In REVERSE, PARK, and NEUTRAL, the transmission is mechanically, not electronically con-
trolled.
w Control of Overdrive
Driving in overdrive is possible if the O/D main switch is on and the shift lever is in the D position. However,
when the vehicle is being driven using the cruise control system (CCS), if the actual vehicle speed drops
to about 4 km/h (2 mph) below the set speed while the vehicle is running in overdrive, the CCS ECU sends
a signal to the ECM to release the overdrive and prevent the transmission from shifting back into overdrive
until the actual vehicle speed reaches the speed set in the CCS memory.
On this model, if the engine coolant temperature falls below 60°C (140°F), the ECM sends a signal to the
ECM, preventing the transmission from up±shifting into overdrive.
w Control of Lock±Up System
The ECM has programmed in its memory a lock±up clutch operation pattern for each driving mode (Normal
of Manual). Based on this lock±up pattern, the ECM turns lock±up solenoid valve on or off in accordance
with the vehicle speed signals received from the vehicle speed sensor and the throttle opening signals from
the throttle position sensor.
Depending on whether lock±up solenoid valve is on or off, the lock±up relay valve performs changeover
of the fluid passages for the converter pressure acting on the torque converter clutch to engage or disen-
gage the lock±up clutch.
Mandatory Cancellation of Lock±Up System:
If any of the following conditions exist, the ECM turns off lock±up solenoid valve to disengage the lock±up
clutch.
1) The brake light switch comes on (during braking).
2) The IDL points of the throttle position sensor close (throttle valve fully closed).
3) The vehicle speed drops 4 km/h (2 mph) or more below the set speed while the cruise control system
is operating.
4) The engine coolant temperature falls below 60°C (140°F) and vehicle speed is under 60 km/h (37
mph), or 35°C (95°F) and vehicle speed is under 40 km/h (25 mph).
The purpose of 1) and 2) above is to prevent the engine from stalling if the rear wheels lock up.
The purpose of 3) is to cause the torque converter clutch to operate to obtain torque multiplication. The
purpose of 4) is both to improve general driveability, and to speed up transmission warm±up.
Also, while the lock±up system is in operation, the ECM will temporarily turn it off during up±shift or down±
shift in order to decrease shifting shock. AT1±8
± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONOPERATION

MECHANICAL SYSTEM TEST
STALL TEST
The object of this test is to check the overall performance of the transmission and engine by measuring
the stall speeds in the D and R positions.
NOTICE:
wDo the test at normal operating fluid temp. 50±80 °C (122±176 °F).
wDo not continuously run this test longer than 5 seconds.
wTo ensure safety, conduct this test in a wide, clear, level area which provides good traction.
wThe stall test should always be carried out in pairs. One technician should observe the
conditions of wheels or wheel stoppers outside the vehicle while the other is doing the test.
MEASURE STALL SPEED
(a) Chock the 4 wheels.
(b) Connect a tachometer to the engine.
(c) Fully apply the parking brake.
(d) Keep your left foot pressed firmly on the brake pedal.
(e) Start the engine.
(f) Shift into the D position. Fully depress the accelerator pedal with your right foot. Quickly read the stall
speed.
Stall speed:
2,450 + 150 rpm
(g) Do the same test in R position.
Quickly read the stall speed.
Stall speed:
2,450 + 150 rpm
AT1±44± AT340E (2JZ±GE) AUTOMATIC TRANSMISSIONTROUBLESHOOTING

MECHANICAL SYSTEM TESTS
STALL TEST
The object of this test is to check the overall performance of the transmission and engine by measuring
the stall speeds in the D and R positions.
NOTICE:
wDo the test at normal operating fluid temp. 50±805C (122±1765F).
wDo not continuously run this test longer than 5 seconds.
wTo ensure safety, conduct this test in a wide, clear, level area which provides good traction.
wThe stall test should always be carried out in pairs. One technician should observe the conditions of
wheels or wheel stoppers outside the vehicle while the other is doing the test.
MEASURE STALL SPEED
(a) Chock the 4 wheels.
(b) Fully apply the parking brake.
(c) Connect a tachometer to the engine.
(d) Start the engine and check idle.
(e) Keep you foot pressed firmly on the brake pedal.
(f) Shift into the D position. Fully depress the accelerator pedal.
Quickly read the stall speed.
Stall speed:
2,600+150 rpm
(g) Do the same test in R position.
Quickly read the stall speed.
Stall speed:
2,600+150 rpm
AT2±44± A340E (2JZÐGTE) AUTOMATIC TRANSMISSIONTROUBLESHOOTING

WATER PUMP REMOVAL
1. 2JZ±GTE:
REMOVE NO.1 AIR HOSE
2. 2JZ±GE:
REMOVE AIR CLEANER, VAF METER AND INTAKE AIR
CONNECTOR PIPE ASSEMBLY
(See step 6 in engine removal in Engine Mechanical)
3. 2JZ±GTE:
REMOVE AIR CLEANER AND MAF METER ASSEMBLY
(See step 7 in engine removal in Engine Mechanical)
4. REMOVE RADIATOR ASSEMBLY
(See radiator removal)
5. 2JZ±GTE M/T:
REMOVE DRIVE BELT TENSIONER DAMPER
(See step 2 in timing belt removal in Engine Mechanical)
6. REMOVE DRIVE BELT, FAN, FLUID COUPLING
ASSEMBLY AND WATER PUMP PULLEY
(a) Loosen the 4 nuts holding the fluid coupling to the water
pump.
(b) Loosen the drive belt tension by turning the drive belt
tensioner clockwise, and remove the drive belt.
(c) Remove the 4 nuts, the fan, fluid coupling assembly and
water pump pulley.
7. REMOVE WATER INLET, LOWER RADIATOR HOSE
ASSEMBLY AND THERMOSTAT
(See step 2 to 4 in thermostat removal)
8. REMOVE TIMING BELT
(See steps 4 to 15 in timing belt removal in Engine Me-
chanical)
9. 2JZ±GTE:
REMOVE GENERATOR
(See step 6 in generator removal in Charging System)
10. 2JZ±GE Except California:
REMOVE EXHAUST MANIFOLD HEAT INSULATOR EG±334
± ENGINECOOLING SYSTEM

2. INSTALL IDLER PULLEY
(See step 2 in timing belt installation in Engine Mechani-
cal)
3. 2JZ±GTE:
INSTALL WATER OUTLET AND NO.1 WATER BYPASS
PIPE
(a) Install 2 new O±rings to the No.1 water bypass pipe.
(b) Apply soapy water to the O±rings.
(c) Install the No.1 water pass pipe to the water pump.
(d) Install a new gasket and the water outlet with the 2 bolts.
Torque: 21 NVm (210 kgfVcm, 15 ftVlbf)
(e) Connect the ECT sensor and sender gauge connectors.
4. 2JZ±GE:
INSTALL WATER BYPASS OUTLET AND NO.1 WATER
BYPASS PIPE
(a) Install 2 new O±rings to the No.1 water bypass pipe.
(b) Install a new O±ring and the water bypass outlet with the 2
bolts.
Torque: 8.8 NVm (90 kgfVcm, 78 in.Vlbf)
5. 2JZ±GTE:
CONNECT TURBO WATER HOSES TO WATER OUTLET
6. 2JZ±GE Except California:
INSTALL EXHAUST MANIFOLD HEAT INSULATOR
7. 2JZ±GTE:
INSTALL GENERATOR
(See generator installation in Charging System)
8. INSTALL TIMING BELT
(See steps 10 to 14 in timing belt installation in Engine
Mechanical)
9. INSTALL WATER INLET AND LOWER RADIATOR HOSE
ASSEMBLY
(See thermostat installation)
10. INSTALL WATER PUMP PULLEY, FAN, FLUID COUPLING
ASSEMBLY AND DRIVE BELT
(a) Align the matchmarks, and install the water pump pulley, the
fan and fluid coupling assembly with the 4 nuts.
(b) Install the drive belt by turning the drive belt tensioner
clockwise.
(c) Stretch the belt tight, and tighten the 4 nuts.
Torque: 16 NVm (165 kgfVcm, 12 ftVlbf)
EG±338± ENGINECOOLING SYSTEM

OIL PUMP REMOVAL
HINT: When repairing the oil pump, the oil pan and strainer
should be removed and cleaned.
1. REMOVE ENGINE WITH TRANSMISSION
(See components for engine removal and installation)
2. SEPARATE ENGINE AND TRANSMISSION
(See components for engine & transmission separation
and assembly)
3. INSTALL ENGINE TO ENGINE STAND FOR REMOVAL
4. 2JZ±GTE:
REMOVE GENERATOR
5. 2JZ±GTE:
REMOVE CRANKSHAFT POSITION SENSOR
(a) Disconnect the sensor connector from the bracket.
(b) Disconnect the sensor connector from the wiring connector.
(c) Disconnect the wire clamp from the cylinder block.
(d) Remove the bolt and position sensor.
6. REMOVE TIMING BELT
(See steps 4 to 8 in timing belt removal in Engine Me-
chanical)
7. 2JZ±GTE M/T:
REMOVE DRIVE BELT TENSIONER BRACKET
Remove the 2 nuts and tensioner bracket.
8. REMOVE IDLER PULLEY
(See step 15 in timing belt removal in Engine Mechanical)
9. REMOVE CRANKSHAFT TIMING PULLEY
(See step 17 in timing belt removal in Engine Mechanical)
10. REMOVE OIL DIPSTICK AND GUIDE ASSEMBLY
(a) Remove the bolt.
(b) Pull out the dipstick guide together with the dipstick.
(c) Remove the O±ring from the dipstick guide.
11. REMOVE OIL LEVEL SENSOR
(a) Disconnect the level sensor connector.
(b) Remove the 4 bolts and level sensor.
(c) Remove the gasket from the level sensor.
NOTICE: Be careful not to drop the oil level sensor when re-
moving it.
± ENGINELUBRICATION SYSTEMEG±367

ENGINE MECHANICAL
PREPARATION
SST (SPECIAL SERVICE TOOLS)
09201±10000 Valve Guide Bushing Remover &
Replacer Set
(09201±01060) Valve Guide Bushing Remover &
Replacer 6
09202±70010 Valve Spring Compressor
09213±70010 Crankshaft Pulley Holding Tool
09222±30010Connecting Rod Bushing Remover
& Replacer
09223±15030 Oil Seal & Bearing ReplacerCrankshaft rear oil seal
09248±55040 Valve Clearance Adjust Tool Set
(09248±05410) Valve Lifter Press
(09248±05420) Valve Lifter Stopper
09301±00110 Clutch Guide Tool2JZ±GE M/T
09316±60010 Transmission & Transfer Bearing
Replacer
(09316±00010) Replacer PipeCrankshaft front oil seal
Camshaft oil seal
± ENGINEENGINE MECHANICALEG±3

(09316±00050) Replacer ªDº
09330±00021Companion Flange Holding Tool
09608±30022 Front Hub Bearing Replacer Set
(09608±05010) Handle
09816±30010 Oil Pressure Switch Socket
09843±18020 Diagnosis Check Wire
09950±50010 Puller C Set
(09951±05010)Hanger 150
(09952±05010) Slide Arm
(09953±05020) Center Bolt 150
(09954±05010)Claw No.1
(09954±05030)Claw No.3
09960±10010 Variable Pin Wrench Set
(09962±01000) Variable Pin Wrench Arm AssyCamshaft timing pulley
Camshaft pulley
Crankshaft timing pulley
Crankshaft pulley
Crankshaft timing pulley
Crankshaft pulley
Crankshaft timing pulley
Crankshaft pulley
Crankshaft timing pulley
Knock sensor
Oil pressure switch
Crankshaft rear oil seal
Valve guide bushing
Crankshaft pulley
Camshaft oil seal
EG±4± ENGINEENGINE MECHANICAL

(09963±01000) Pin 10Camshaft timing pulley
RECOMMENDED TOOLS
Cylinder head bolt
A/C compressor stud bolt
For suspending engine
09040±00010Hexagon Wrench Set

09043±50100Bi±hexagon Wrench 10 mm

09044±00020 Torx Socket E10

09082±00050 TOYOTA Electrical Tester Set
09090±04010 Engine Sling Device

09200±00010 Engine Adjust Kit

09258±00030 Hose Plug Set


EQUIPMENT
 Caliper gauge 
 CO/HC meter 
 
 Compression gauge
 
 
 Connecting rod aligner 
 Cylinder gauge 
 
 Dial indicator 
 
 Dye penetrant 
 Engine tune±up tester 
± ENGINEENGINE MECHANICALEG±5

 Heater 
 Micrometer 
 
 Mirror
 
 
 Magnetic finger 
 Piston ring compressor 
 
 Piston ring expander
 
 
 Plastigage 
 Precision straight edge 
 
 Spring tester
 
 Valve spring
 Steel square Valve spring
 Thermometer 
 
 Torque wrench 
 
 Valve seat cutter 
 Vernier calipers 
 
 V±block 
 
SSM (SERVICE SPECIAL MATERIALS)
 
 
 
08826±00080 
 
 
Seal Packing Black or equivalent
(FIPG) 
 
 
No.1 camshaft bearing cap
Cylinder head
Rear oil seal retainer
 
 
 
08833±00070 
 
 
Adhesive 1324,
THREE BOND 1324 or equivalent 
 
 
Drive plate bolt (A/T)
Union for oil cooler hose
(2JZ±GTE)
 
 
 
08833±00080 
 
 
Adhesive 1344,
THREE BOND 1344,
LOCTITE 242 or equivalent 
 
 
Idler pulley pivot bolt
Oil pressure switch
EG±6± ENGINEENGINE MECHANICAL