TOYOTA SUPRA 1997 Service Repair Manual

SR14E-01
SR-52
- STEERINGPOWER STEERING GEAR
1936 Author
: Date
:
1997 SUPRA (RM502U)
INSTALLATION
1. INSTALL PS GEAR ASSEMBLY
(a) Temporarily install the 2 bolts and nuts.
(b) After installing the rack housing bracket and grommet, torque the 2 bolts and nuts.
Torque: 75 N´m (770 kgf´cm, 55 ft´lbf)
2. INSTALL RACK HOUSING BRACKET AND GROMMET
Torque the 2 bolts and nuts.
Torque: 75 N´m (770 kgf´cm, 55 ft´lbf)
3. CONNECT PPS SOLENOID CONNECTOR
4. CONNECT PRESSURE FEED TUBE
Torque the union bolt over a new gasket.
Torque: 49 N´m (500 kgf´cm, 36 ft´lbf)
5. CONNECT RETURN TUBE
Torque the union bolt over 2 new gaskets.
Torque: 49 N´m (500 kgf´cm, 36 ft´lbf)
6. CONNECT RH AND LH TIE ROD ENDS (See page SA-17)
7. CONNECT INTERMEDIATE SHAFT (See page SR-21)
8. INSTALL FR SUSPENSION MEMBER PROTECTOR
Tighten the 4 bolts.
9. INSTALL ENGINE UNDER COVER
Install the 10 bolts.
10. POSITION FRONT WHEELS FACING STRAIGHT AHEAD
HINT:
Do it with the front of the vehicle jacked up.
11. CENTER SPIRAL CABLE (See page SR-21)
12. INSTALL STEERING WHEEL
(a) Align the matchmarks on the wheel and steering column main shaft.
(b) Temporarily tighten the wheel set nut.
(c) Connect the connector.
13. BLEED POWER STEERING SYSTEM (See page SR-3)
14. CHECK STEERING WHEEL CENTER POINT
15. TORQUE STEERING WHEEL SET NUT
Torque: 35 N´m (360 kgf´cm, 26 ft´lbf)
16. INSTALL STEERING WHEEL PAD (See page SR-21)
17. CHECK FRONT WHEEL ALIGNMENT (See page SA-2)

SR14F-01
F00595
PPS Solenoid Valve
PPS ECU
PPS ECU
Heater to Register
No.5 Duct Heater to Register
No.4 Duct
Instrument Panel Box
- STEERINGPROGRESSIVE POWER STEERING (PPS)
SR-53
1937 Author
: Date
:
1997 SUPRA (RM502U)
PROGRESSIVE POWER STEERING (PPS)
LOCATION

SR14G-01
F03098
Wire Harness Side:
SR4680
21
SR4681
21 SR-54
- STEERINGPROGRESSIVE POWER STEERING (PPS)
1938 Author
: Date
:
1997 SUPRA (RM502U)
INSPECTION
1. INSPECT ECU-IG FUSE (Instrument panel J/B)
2. INSPECT PPS ECU CIRCUIT
(a) Disconnect the PPS ECU connector.
(b) Inspect the connector on wire harness side, as shown in
the illustration.
Tester connectionConditionSpecified condition
4 - Body groundIgnition switch ONBattery positive voltage
6 - Body groundIgnition switch ONContinuity
*5 - 6
Ignition switch ON.
Spin the rear wheel on one side with jacking or
lifting UP.
0 " 5 or more " 0
If the circuit is not as specified, check and replace the wire har-
ness.
*If the circuit is not as specified, inspect the speed sensor.
3. INSPECT PPS SOLENOID VALVE
(a) Disconnect the PPS solenoid connector.
(b) Measure the resistance between the terminals of the so-
lenoid 1 and 2.
Resistance: 6 - 11 W
If it is not as specified, replace the pressure control valve with
the solenoid valve.
(c) Check the PPS solenoid operation.
(1) Connect the battery positive terminal to the sole-
noid terminal 1.
(2) Connect the battery negative terminal to the sole-
noid terminal 2.
(3) Check that the solenoid makes a ºclicksº sound.
If it is faulty, replace the pressure control valve with the solenoid
valve.
NOTICE:

Do not apply voltage for more than 30 seconds to
avoid burning out the solenoid.

If repeating this step, wait until the solenoid cools
down enough that it can be touched by hand.
(d) Connect the PPS solenoid connector.

F03098
Wire Harness Side:
R07587
62
R07587
37 mph (60 km/h)
62
- STEERINGPROGRESSIVE POWER STEERING (PPS)
SR-55
1939 Author
: Date
:
1997 SUPRA (RM502U)
(e) Inspect the PPS solenoid valve circuit.
(1) Disconnect the PPS ECU connector.
(2) Check continuity between the terminals of the con-
nector on wire harness side, as shown in the illustra-
tion.
Tester connectionSpecified condition
1 - 6No continuity
2 - 6No continuity
If it is not as specified, repair or replace wire harness or connec-
tor.
(3) Connect the PPS ECU connector.
4. INSPECT PPS ECU
(a) Jack up the vehicle and support it on stands.
(b) Start the engine.
(c) Measure the voltage of ECU.
(1) Using a voltmeter, measure the voltage between
ECU terminals 2 and 6 while the engine is idling.
Standard voltage: 0.15 - 0.20 V
(2) Place the transmission in gear and while running at
about 62 mph (100 km/h), measure the voltage be-
tween ECU terminals 2 and 6.
Standard voltage:
2JZ-GE: 0.06 - 0.17 v
2JZ-GTE: 0.07 - 0.17 v
If no voltage, try another ECU for SUPRA.
(d) Lower the vehicle.

SA0OP-02
- SUSPENSION AND AXLETROUBLESHOOTING
SA-1
1691 Author
: Date
:
1997 SUPRA (RM502U)
TROUBLESHOOTING
PROBLEM SYMPTOMS TABLE
Use the table below to help you find the cause of the problem. The numbers indicate the priority of the likely
cause of the problem. Check each part in order. If necessary, replace these parts.
SymptomSuspect AreaSee page
Wander/pulls
1. Tires (Worn or improperly inflated)
2. Wheel alignment (Incorrect)
3. Steering linkage (Loosen or worn)
4. Hub bearings (Loosen or worn)
5. Steering gear (Out of adjustment or broken)SA-2
SA-3
SA-8
-
SA-1 1
SA-41
-
Bottoming
1. Vehicle (Overloaded)
2. Spring (Weak)
3. Shock absorber (Worn out)-
SA-19
SA-89
SA-19
SA-89
Sways/pitches
1. Tires (Worn or improperly inflated)
2. Stabilizer bar (Bent or broken)
3. Shock absorber (Worn out)SA-2
SA-37
SA-107
SA-19
SA-89
Front wheel shimmy
1. Tires (Worn or improperly inflated)
2. Wheels (Out of balance)
3. Shock absorber (Worn out)
4. Wheel alignment (Incorrect)
5. Ball joints (Worn)
6. Hub bearings (Loosen or worn)
7. Steering linkage (Loosen or worn)
8. Steering gear (Out of adjustment or broken)SA-2
SA-2
SA-19
SA-3
SA-28
SA-32
SA-1 1
-
-
Abnormal tire wear
1. Tires (Improperly inflated)
2. Wheel alignment (Incorrect)
3. Suspension parts (Worn out)
4. Shock absorber (Worn out)SA-2
SA-3
SA-8
-
SA-19
SA-89
Noise in rear differential
1. Oil level (Low or wrong grade)
2. Excessive backlash between pinion and ring gear
3. Ring, pinion or side gears (Worn or chipped)
4. Pinion shaft bearing (Worn)
5. Side bearing (Worn)
6. Differential bearing (Loosen or worn)SA-59
SA-62
SA-62
SA-62
SA-62
SA-62
Oil leak from rear differential
1. Oil level (Too high or wrong grade)
2. Drive pinion oil seal (Worn or damaged)
3. Side gear oil seal (Worn or damaged)
4. Companion flange (Loose or damaged)
5. Side gear shaft (Damaged)SA-59
SA-62
SA-62
SA-62
SA-62

R03031
SA0OQ-01
R07928
R11096
SA-2
- SUSPENSION AND AXLETIRE AND WHEEL
1692 Author
: Date
:
1997 SUPRA (RM502U)
TIRE AND WHEEL
INSPECTION
1. INSPECT TIRE
(a) Check the tires for wear and for the proper inflation pres-
sure.
Cold tire inflation pressure:
2JZ-GE
Tire sizeFront
kPa (kgf/cm2, psi)
Rear
kPa (kgf/cm2, psi)
225/50R16 92V230 (2.3, 33)-
245/45R16 94V-230 (2.3, 33)
2JZ-GTE
Tire sizeFront
kPa (kgf/cm2, psi)
Rear
kPa (kgf/cm2, psi)
235/45ZR17230 (2.3, 33)-
255/40ZR17-230 (2.3, 33)
(b) Check the tire runout.
Tire runout: 1.4 mm (0.055 in.) or less
2. INSPECT WHEEL BALANCE
(a) Check and adjust the Off-the-car balance.
(b) If necessary, check and adjust the On-the-car balance.
Imbalance after adjustment: 5.0 g (0.011 lb) or less
3. CHECK WHEEL BEARING LOOSENESS
(a) Check the axle bearing backlash.
Maximum: 0.05 mm (0.0020 in.)
(b) Check the axle hub deviation.
Maximum: 0.05 mm (0.0020 in.)
4. CHECK FRONT SUSPENSION FOR LOOSENESS
5. CHECK STEERING LINKAGE FOR LOOSENESS
6. CHECK BALL JOINT FOR LOOSENESS
7. CHECK SHOCK ABSORBER WORKS PROPERLY

Check for oil leak.

Check mounting bushings for wear.

Check front and rear of the vehicle for bounce.

R06911R06912F02032
Front
RearSA0OR-01
Z03382
- SUSPENSION AND AXLEFRONT WHEEL ALIGNMENT
SA-3
1693 Author
: Date
:
1997 SUPRA (RM502U)
FRONT WHEEL ALIGNMENT
INSPECTION
1. MEASURE FRONT AND REAR VEHICLE HEIGHT
Tire sizeHeight
2JZ-GE Front*1
Rear*2225/50R16 92V
245/45R16 94V186 mm (7.32 in.)
246 mm (9.68 in.)
2JZ-GTE Front*1
Rear*2235/45ZR17
255/40ZR17188 mm (7.40 in.)
254 mm (10.00 in.)
*1: Front measuring point
Measure from the ground to the center of the lower suspension
arm front mounting bolt.
*
2: Rear measuring point
Measure from the ground to the center of the lower suspension
arm No.2 mounting bolt.
NOTICE:
Before inspecting the wheel alignment, adjust the vehicle
height to the specification.
If the vehicle height is not within the specification, try adjust it
by pushing down on or lifting the body.
2. INSTALL CAMBER- CASTER- KINGPIN GAUGE
ONTO VEHICLE OR POSITION VEHICLE ON WHEEL
ALIGNMENT TESTER
Follow the specific instructions of the equipment manufacturer.
3. INSPECT CAMBER, CASTER AND STEERING AXIS
INCLINATION
2JZ-GE2JZ-GTE
Camber
Left-right error-0°20' ± 45'
(-0.33° ± 0.75°)
30' (0.5°) or less-0°30' ± 45'
(-0.5° ± 0.75°)
30' (0.5°) or less
Caster
Left-right error3°20' ± 45'
(3.33° ± 0.75°)
30' (0.5°) or less3°30' ± 45'
(3.5° ± 0.75°)
30' (0.5°) or less
Steering axis
inclination
9°35' ± 45'
(9.58° ± 0.75°)9°45' ± 45'
(9.75° ± 0.75°)
If the steering axis inclination is not within the specification, after
camber and caster have been correctly adjusted, recheck the
steering knuckle and front wheel for bearing or looseness.

SA3213
AB
D
Front
C
R06928
R06930
R06914
SA-4
- SUSPENSION AND AXLEFRONT WHEEL ALIGNMENT
1694 Author
: Date
:
1997 SUPRA (RM502U)
4. INSPECT TOE-IN
Toe-in
(Total)A + B: 0° ± 12' (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.
5. ADJUST CAMBER AND CASTER
(a) Remove the engine under cover.
(b) Remove the nut, 2 bolts and 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 adjust-
ing cams (See adjustment chart).
HINT:
Try to adjust the camber and caster to the center value.
(e) Torque the front and/or rear adjusting cam nuts.
Torque: 226 N´m (2,300 kgf´cm, 166 ft´lbf)
(f) Install the lower arm bracket stay.
Torque:
Bolt: 44 N´m (450 kgf´cm, 32 ft´lbf)
Nut: 59 N´m (600 kgf´cm, 43 ft´lbf)
(g) Install the engine under cover.



6. ADJUST TOE-IN
(a) Remove the boot clamps.
(b) Loosen the tie rod end lock nuts.

R06915
SA0028
AB
Front
A: Inside
B: OutsideA B
- SUSPENSION AND AXLEFRONT WHEEL ALIGNMENT
SA-5
1695 Author
: Date
:
1997 SUPRA (RM502U)
(c) Turn the left and right rack ends an equal amount to adjust
the toe-in.
HINT:

Make sure that the lengths of the left and right rack ends
are the same.

Try to adjust the toe-in to the center value.
Rack end length difference:
1.5 mm (0.059 in.) or less
(d) Tighten the tie rod end lock nut.
Torque: 56 N´m (570 kgf´cm, 41 ft´lbf)
(e) Place the boot on the seat and clip it.
HINT:
Make sure that the boots are not twisted.
7. INSPECT WHEEL ANGLE
Turn the steering wheel fully and measure the turning angle.
2JZ-GE2JZ-GTE
Inside wheel35°00' (33°00' - 36°00')
35° (33° - 36°)34°55' (33°55' - 36°55')
34.92° (32.92° - 35.92°)
Outside wheel
30°45'
(30.75°)30°35'
(30.58°)
If the wheel angle are not within the specifications, check to see
if the lengths of the left and right rack ends are the same.
HINT:
If the tie rods lengths are not equal, the wheel angle cannot be
adjusted properly. Reinspect the toe-in after adjusting the tie
rods lengths.

Z18435
Example
Camber
Caster
R07020
Front
Front Cam
Rear CamFront Cam
Rear Cam SA-6
- SUSPENSION AND AXLEFRONT WHEEL ALIGNMENT
1696 Author
: Date
:
1997 SUPRA (RM502U)
8. HOW TO READ ADJUSTMENT CHART
(a) Mark on the graph the measurements taken from the ve-
hicle.
Example (2JZ-GE):
Camber: +0°10' (+0.16°)
Caster: +4°20' (+4.33°)
(b) Read from the graph the amounts of the front and/or rear
cams to be adjusted.
Amount to turn adjusting cam (by graduation):
Front cam: + (Longer) 1.8
Rear cam: - (Shorter) 2.2