Engine TOYOTA SUPRA 1995 Service Repair Manual

CONNECTORS
Slightly shake the connector vertically and horizontally.
Inspection of connectors
(a) Does the wire harness connecting with its corresponding
part have insufficient slack?
(b) Are the terminals dirty?
(c) Are the terminals making loose contact due to terminals
spread?
WIRE HARNESS
Slightly shake the wire harness vertically and horizontally.
Thoroughly check the connector joint, the fulcrum of the
vibration and the wiring opening in the engine/passenger
compartment panel.
PARTS AND SENSORS
Gently tap the part or sensor considered to be the problem
caused and check if the malfunction will occur.
CAUTION: Do not apply vibration to the center airbag
sensor assembly.
VIBRATION METHOD: When vibration seems to be the major cause.
SYMPTOM SIMULATION
ªIntermittent troubles or problemsº are the malfunctions about which the customer has a complaint, but which
do not occur and cannot be confirmed in the workshop. The intermittent problems also include complaints about
the SRS warning light going on and off erratically.
The self±diagnostic system stores the circuit of the intermittent problem in memory even if the ignition switch
is turned off.
For accurate diagnosis of the problems, ask the customer to obtain as much information as possible following
the customer problem analysis check sheet (See page RS±43) and try to reproduce the intermittent problem.
The problem simulation methods described below are the effective ways to reproduce the problem conditions
by applying vibration, heat, and humidity. RS±48
± SUPPLEMENTAL RESTRAINT SYSTEMTROUBLESHOOTING

INSPECTION PROCEDURES [P] Preparation [C] Check
(1) Turn ignition switch to LOCK.
(2) Disconnect center airbag sensor assembly con±
nector.
(3) Turn ignition switch ON. But do not start engine.
(4) Measure voltage at IG
2 or ACC on connector
wire harness side of center airbag sensor as±
sembly and operate electric system (defogger,
wiper, headlight, heater blower, etc.).
Voltage: 6 V Ð 11.5 V at IG
2 and ACC.
(5) Turn electric system switch OFF.
(6) Turn ignition switch to LOCK.
(7) Remove voltmeter and connect center sensor
assembly connector.
Preparation.
Does SRS warning light turn off?
Turn ignition switch ON.
Operate electric system checked in [1] (4) and
check that SRA warning light goes off.
Turn ignition switch ON.
Check battery and charging system.
(See charging system section)
Check diagnostic trouble code, and if a malfunc-
tion code is output, perform troubleshooting ac-
cording to malfunction code. If a normal code is
output, replace center airbag sensor assembly.
± SUPPLEMENTAL RESTRAINT SYSTEMTROUBLESHOOTINGRS±53

WHEEL ALIGNMENT
FRONT WHEEL ALIGNMENT
1. MEASURE VEHICLE HEIGHT
Front vehicle height
 Engine Tire size Height
 2JZ±GE 225/50ZR16 185 mm (7.28 in.)
 2JZ±GTE 235/45ZR17 187 mm (7.36 in.)
Measuring point:
Measure from the ground to the center of the lower suspen-
sion arm front mounting bolt.
NOTICE: Before inspecting the wheel alignment, adjust
the vehicle height to specification.
If the vehicle height is not to specification, try to adjust it by
pushing down on or lifting the body.
2. INSTALL CAMBER±CASTER±KINGPIN GAUGE OR
ONTO WHEEL ALIGNMENT TESTER
Follow the specific instructions of the equipment manufactur-
er.
3. INSPECT CAMBER, CASTER AND STEERING AXIS
INCLINATION
Specifications
  2JZ±GE 2JZ±GTE
 
 
Camber
Left±right error 
 
±0°20'+45'
30' or less 
 
±0°30'+45'
30' or less
 
 
Caster
Left±right error 
 
3°20'+45'
30' or less 
 
3°30'+45'
30' or less
 
 
Steering axis
inclination 
 
9°35'+45'
(Reference) 
 
9°45'+45'
(Reference)
If the steering axis inclination is not as specified, after camber
and caster have been correctly adjusted, recheck the steer-
ing knuckle front wheel for bearing or looseness.
4. INSPECT TOE±IN
Toe±in (total):
A+B: 0° + 0.2°
C±D: 0 + 2 mm (0 + 0.08 in.)
If toe±in is not within specification adjust by the tie rod end. SA±4
± SUSPENSION AND AXLEWHEEL ALIGNMENT

5. ADJUST CAMBER AND CASTER
(a) Remove the engine under cover.
(b) Remove the nut, 2 bolts and front lower arm bracket stay.
(c) Loosen the front and/or rear adjusting cam nuts.
(d) Adjust the camber and caster by front and/or rear adjusting
cams. (See adjustment chart)
Specifications
  2JZ±GE 2JZ±GTE
 Camber
Left±right error ±0°20' + 30'
30' or less ±0°30' + 30'
30' or less
 
 Caster
Left±right error 
 3°20' + 30'
30' or less 
 3°30' + 30'
30' or less
(e) Torque the front and/or rear adjusting cam nuts.
Torque: 226 NVm (2,300 kgfVcm, 166 ftVlbf)
(f) Install the front lower arm bracket stay.
Torque:
Nut: 43 NVm (440 kgfVcm, 32 ftVlbf)
Bolt: 59 NVm (600 kgfVcm, 43 ftVlbf)
(g) Install the engine under cover.
6. ADJUST TOE±IN
(a) Remove the boot clamps.
(b) Loosen the tie rod end lock nuts.
(c) Turn the left and right tie rod ends an amount to adjust the
toe±in.
Toe±in (total):
A+ B: 0° + 0.1°
C±D: 0 + 1 mm (0 + 0.04 in.)
HINT: Ensure that the lengths of the left and right tie rods are
the same.
Tie rod end length left±right error:
Less than 1.5 mm (0.059 in.)
(d) Tighten the tie rod end lock nut.
Torque: 56 NVm (570 kgfVcm, 41 ftVlbf)
(e) Place the boot on the seat and clip it.
HINT: Ensure that the boots are not twisted.
± SUSPENSION AND AXLEWHEEL ALIGNMENTSA±5

REAR WHEEL ALIGNMENT
1. MEASURE VEHICLE HEIGHT
Rear vehicle height
 Engine Tire size Height
 2JZ±GE 245/50ZR16 250 mm (9.84 in.)
 2JZ±GTE 255/40ZR17 251 mm (9.88 in.)
Measuring point:
Measure from the ground to the center of the lower suspen-
sion arm No.2 mounting bolt.
NOTICE: Before inspecting the wheel alignment, adjust
the vehicle height to specification.
If the vehicle height is not to specification, try to adjust it by
pushing down on or lifting the body.
2. INSTALL CAMBER±CASTER±KINGPIN GAUGE OR
ONTO WHEEL ALIGNMENT TESTER
Follow the specific instructions of the equipment manufactur-
er.
3. INSPECT CAMBER
 
 
 
 2JZ±GE 
 2JZ±GTE 
 Camber
 
 ±1°35' + 45'
 
 ±1°30' + 45'
 Left±right error 30' or less 30' or less
4. INSPECT TOE±IN
Toe±in (total):
A+ B: 0.3° + 0.2°
C±D: 3 + 2 mm (0.12 + 0.08 in.)
5. ADJUST CAMBER AND TOE±IN
(a) Measure the length of the lower suspension arm No.1 and
No.2, as shown in the illustration.
Length:
(E±F) or (F±E) should be less 4.0 mm.
If not, adjust the length of the arms by turning the adjusting
cam, as shown, until (E±F) or (F±E) is less than 4.0 mm.
(b) Measure the camber and toe±in.
Specifications
 
 Toe±in 
  A+ B: 0.3° + 0.1°
C±D: 3 + 1 mm (0.12 + 0.04 in.)
 
  Camber (2JZ±GE)
Left±right error 
 ±1°35' + 30'
30' or less
 
  Camber (2JZ±GTE)
Left±right error 
 ±1°30' + 30'
30' or less
If the camber and toe±in are still not within the specification,
adjust the camber and toe±in with the adjusting cam.
± SUSPENSION AND AXLEWHEEL ALIGNMENTSA±9

LOWER SUSPENSION ARM REMOVAL
Installation is in the reverse order of removal.
INSTALLATION HINT: After installation, check front wheel
alignment.
(See page SA±4)
1. REMOVE FRONT WHEEL
Torque: 103 NVm (1,050 kgfVcm, 76 ftVlbf)
2. REMOVE ENGINE UNDER COVER
3. REMOVE BRAKE CALIPER
(a) Remove the 2 bolts and brake caliper from the steering
knuckle.
Torque: 118 NVm (1,200 kgfVcm, 87 ftVlbf)
(b) Support the brake caliper securely.
4. DISCONNECT STABILIZER BAR LINK FROM LOWER
SUSPENSION ARM
Remove the nut and disconnect the link from the arm.
Torque: 74 NVm (750 kgfVcm, 54 ftVlbf)
HINT: If the ball joint stud turns together with the nut, use a
hexagon wrench to hold the stud.
5. DISCONNECT STEERING KNUCKLE
(a) Remove the clip and nut.
Torque: 125 NVm (1,270 kgfVcm, 92 ftVlbf)
(b) Using SST, disconnect the steering knuckle from the lower
suspension arm.
SST 09628±62011
6. REMOVE LOWER SUSPENSION ARM
(a) Remove the bolt, nut and disconnect the lower suspension
arm from the shock absorber.
Torque: 143 NVm (1,460 kgfVcm, 106 ftVlbf)
INSTALLATION HINT: After stabilizing the suspension,
torque the nut. SA±30
± SUSPENSION AND AXLEFRONT SUSPENSION

STABILIZER BAR AND LINK REMOVAL
Installation is in the reverse order of removal.
1. REMOVE FRONT WHEELS
Torque: 103 NVm (1,050 kgfVcm, 76 ftVlbf)
2. REMOVE ENGINE UNDER COVER
3. REMOVE BOTH STABILIZER BAR LINKS
Remove the nuts and stabilizer bar links from the stabilizer
bar and the lower suspension arm.
Torque: 74 NVm (750 kgfVcm, 54 ftVlbf)
HINT: If the ball joint stud turns together with the nut, use a
hexagon wrench to hold the stud.
4. REMOVE STABILIZER BAR
(a) Remove the left and right apron seal set bolts.
(b) Remove the 4 bracket bolts and the stabilizer bar with the
cushions and brackets.
Torque: 18 NVm (180 kgfVcm, 13 ftVlbf)
5. REMOVE CUSHIONS AND BRACKETS
INSTALLATION HINT: Install the cushion to the outside of the
line.
± SUSPENSION AND AXLEFRONT SUSPENSIONSA±33

REAR DRIVE SHAFT REMOVAL
Installation is in the reverse order of removal.
INSTALLATION HINT: After installation, check ABS speed
sensor signal.
(See page BR±62)
1. REMOVE REAR WHEEL
Torque: 103 NVm (1,050 kgfVcm, 76 ftVlbf)
2. DISCONNECT EXHAUST PIPE MOUNTING
(a) Remove the 2 exhaust pipe support rings.
(b) Support the exhaust pipe securely.
(c) Remove the 2 exhaust pipe support O±rings.
3. REMOVE COTTER PIN, LOCK CAP AND LOCK NUT
(a) Remove the cotter pin and lock cap.
(b) While depressing the brake pedal, remove the nut.
Torque: 289 NVm (2,950 kgfVcm, 213 ftVlbf)
4. REMOVE LOWER SUSPENSION ARM BRACE
Remove the 4 bolts and lower suspension arm brace.
Torque: 18 NVm (180 kgfVcm, 13 ftVlbf)
5. REMOVE REAR DRIVE SHAFT
(a) Place matchmarks on the drive shaft and side gear shaft.
NOTICE: Do not use a punch to mark the matchmarks.
Use paint, etc.
(b) Using a 10 mm hexagon wrench, remove the 6 hexagon bolts
and 2 washers while depressing the brake pedal.
Torque: 83 NVm (850 kgfVcm, 61 ftVlbf)
INSTALLATION HINT: Apply a light coat of engine oil on the
threads of the bolts.
(c) Disconnect the inboard joint from the differential side gear
shaft.
(d) Hold the inboard joint side of the drive shaft so that the
outboard joint side does not bend too much.
± SUSPENSION AND AXLEREAR DRIVE SHAFTSA±47

DIFFERENTIAL REMOVAL
Installation is in the reverse order of removal.
1. DRAIN DIFFERENTIAL OIL
2. REMOVE PROPELLER SHAFT
(See page PR±5)
3. DISCONNECT BOTH REAR DRIVE SHAFTS FROM
DIFFERENTIAL
(a) Place matchmarks on the drive shaft and side gear shaft.
(b) Using a 10 mm hexagon wrench, disconnect both drive
shafts from the differential.
Torque: 83 NVm (850 kgfVcm, 64 ftVlbf)
INSTALLATION HINT: Apply a light coat of engine oil on the
threads of the bolts.
(c) Support both drive shafts securely.
4. REMOVE REAR STABILIZER BAR
(See page SA±96)
5. REMOVE DIFFERENTIAL
(a) Support the differential with a jack.
(b) Using a 12 mm hexagon wrench, remove the bolts.
Torque: 142 NVm (1,450 kgfVcm, 105 ftVlbf)
(c) Remove the 2 bolts and lower mount stoppers.
Torque: 147 NVm (1,500 kgfVcm, 108 ftVlbf)
(d) Remove the differential.
(e) Remove the upper mount stopper from the differential carrier.
HINT: During production, some vehicles did not need adjust-
ing shims to be fitted.
INSTALLATION HINT: Use the upper mount stopper which
was removed.
± SUSPENSION AND AXLEREAR DIFFERENTIALSA±61

2JZ±GE ENGINE TROUBLESHOOTING
EG±381