TOYOTA SUPRA 1997 Service Repair Manual

SR13T-01
SR-2
- STEERINGTROUBLESHOOTING
1886 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, repair or replace these parts.
SymptomSuspect AreaSee page
Hard steering
1. Tires (Improperly inflated)
2. Power steering fluid level (Low)
3. Drive belt (Loose)
4. Front wheel alignment (Incorrect)
5. Steering system joints (Worn)
6. Suspension arm ball joints (Worn)
7. Steering column (Binding)
8. Power steering gear
9. PPS systemSA-2
SR-4
-
SA-3
-
SA-30
SA-35
-
-
SR-54
Poor return
1. Tires (Improperly inflated)
2. Front wheel alignment (Incorrect)
3. Steering column (Binding)
4. Power steering gearSA-2
SA-3
-
-
Excessive play
1. Steering system joints (Worn)
2. Suspension arm ball joints (Worn)
3. Intermediate shaft, Universal joint, Sliding yoke (Worn)
4. Front wheel bearing (Worn)
5. Power steering gear
6. PPS system-
SA-30
SA-35
-
SA-12
-
SR-54
Abnormal noise
1. Power steering fluid level (Low)
2. Steering system joints (Worn)
3. Power steering gearSR-4
-
-

SR13U-01
R07281
Normal
Abnormal
- STEERINGPOWER STEERING FLUID
SR-3
1887 Author
: Date
:
1997 SUPRA (RM502U)
POWER STEERING FLUID
BLEEDING
1. CHECK FLUID LEVEL
(See page SR-4)
2. JACK UP FRONT OF VEHICLE AND SUPPORT IT
WITH STANDS
3. TURN STEERING WHEEL
With the engine stopped, turn the steering wheel slowly from
lock to lock several times.
NOTICE:
Take care that some fluid remains in the oil reservoir.
4. LOWER VEHICLE
5. START ENGINE
Run the engine at idle for a few minutes.
6. TURN STEERING WHEEL
(a) With the engine at idling, turn the steering wheel to left or
right full lock and keep it there for 2-3 seconds, then turn
the wheel to the opposite full lock and keep it there for 2-3
seconds.
(b) Repeat (a) several times.
7. STOP ENGINE
8. CHECK FOR FOAMING OR EMULSIFICATION
If the system has to be bled twice specifically because of foam-
ing or emulsification, check for fluid leaks in the system.
9. CHECK FLUID LEVEL
(See page SR-4)

SR13V-01
R00441
R07281
Normal Abnormal
R10552
5 mm (0.20 in.)
or less
Engine Idling Engine Stopped SR-4
- STEERINGPOWER STEERING FLUID
1888 Author
: Date
:
1997 SUPRA (RM502U)
INSPECTION
1. CHECK FLUID LEVEL
(a) Keep the vehicle level.
With the engine stopped, check the fluid level in the oil
reservoir.
If necessary, add fluid.
Fluid: ATF DEXRON® II or III
HINT:
Check that the fluid level is within the HOT LEVEL range on the
dipstick of the reservoir cap. If the fluid is cold, check that it is
within the COLD LEVEL range.
(b) Start the engine and run it at idle.
(c) Turn the steering wheel from lock to lock several times to
boost fluid temperature.
Fluid temperature: 80°C (176°F)
(d) Check for foaming or emulsification.
If there is foaming or emulsification, bleed power steering sys-
tem.
(See page SR-3)
(e) With the engine idling, measure the fluid level in the oil
reservoir.
(f) Stop the engine.
(g) Wait a few minutes and remeasure the fluid level in the
reservoir.
Maximum fluid level rise: 5mm (0.20 in.)
If a problem is found, bleed power steering system.
(See page SR-3)
(h) Check the fluid level.

Z16580
INSSTSST
OUTPressure Feed Tube
Attachment
PS Vane Pump 2JZ-GE:
2JZ-GTE:
Attachment Attachment PS Vane Pump Attachment
Pressure Feed Tube
- STEERINGPOWER STEERING FLUID
SR-5
1889 Author
: Date
:
1997 SUPRA (RM502U)
2. CHECK STEERING FLUID PRESSURE
(a) Disconnect the pressure feed tube from the PS vane
pump.
(See page SR-26)
(b) Connect SST over a new gasket, as shown below.
SST 09640-10010 (09641-01010, 09641-01030,
09641-01060)
NOTICE:
Check that the valve of the SST is in the open position.
(c) Bleed the power steering system.
(See page SR-3)
(d) Start the engine and run it at idle.
(e) Turn the steering wheel from lock to lock several times to
boost fluid temperature.
Fluid temperature: 80°C (176°F)

Z15498
PS GearOil
Reservior
PS Vane
Pump Closed
SST
Z15499
PS GearOil
Reservior
PS Vane
Pump
SST Open
Z15500
PS GearOil
Reservior
PS Vane
Pump
SST Open SR-6
- STEERINGPOWER STEERING FLUID
1890 Author
: Date
:
1997 SUPRA (RM502U)
(f) With the engine idling, close the valve of the SST and ob-
serve the reading on the SST.
Minimum fluid pressure:
7,355 kPa (75 kgf.cm
2, 1,067 psi)
NOTICE:

Do not keep the valve closed for more than 10 se-
conds.

Do not let the fluid temperature become too high.
(g) With the engine idling, open the valve fully.
(h) Measure the fluid pressure at engine speeds of 1,000 rpm
and 3,000 rpm.
Difference fluid pressure:
490 kPa (5 kgf.cm
2, 71 psi) or less
NOTICE:
Do not turn the steering wheel.
(i) With the engine idling and valve fully opened, turn the
wheel to full lock.
Minimum fluid pressure:
7,355 kpa (75 kgf,cm
2, 1,067 psi)
NOTICE:

Do not maintain lock position for more than 10 se-
conds.

Do not let the fluid temperature become too high.
(j) Disconnect the SST.
(k) Connect the pressure feed tube.
(See page SR-34)
(l) Bleed the power steering system.
(See page SR-3)

Z13450
2JZ-GE:
2JZ-GTE:SR0CK-01
- STEERINGAIR CONTROL VALVE
SR-7
1891 Author
: Date
:
1997 SUPRA (RM502U)
AIR CONTROL VALVE
INSPECTION
CHECK IDLE-UP
(a) Turn the air conditioner switch off.
(b) Start the engine and run it at idle.
(c) Fully turn the steering wheel.
(d) Check that the engine speed decreases when the vacu-
um hose of the air control valve is pinched.
(e) Check that the engine speed increases when the hose is
released.

SR13W-01
R09732
W00625
PPS Solenoid
Connector SR-8
- STEERINGSTEERING WHEEL
1892 Author
: Date
:
1997 SUPRA (RM502U)
STEERING WHEEL
INSPECTION
1. CHECK STEERING WHEEL FREEPLAY
With the vehicle stopped and tires pointed straight ahead, rock
the steering wheel gently back and forth with light finger pres-
sure.
Freeplay should not exceed the maximum.
Maximum freeplay: 30 mm (1.18 in.)
2. CHECK STEERING EFFORT
(a) Center the steering wheel.
(b) Remove the steering wheel pad.
(See page SR-1 1)
(c) Start the engine and run it at idle.
(d) Measure the steering effort in both directions.
Reference (Maximum): 6.9 N´m (70 kgf´cm, 61 in.´lbf)
If steering effort is excessive, repair the power steering unit.
HINT:
Be sure to consider the tire type, pressure and contact surface
before making your diagnosis.
(e) Disconnect the PPS solenoid connector.
(f) Measure the steering effort in both directions and check
that the steering effort exceeds the reference value in (d),
and that the power assist is operating.
If steering effort is not heavier than (d), check the solenoid.
(g) Connect the connector.
(h) Torque the steering wheel set nut.
Torque: 35 N´m (360 kgf´cm, 26 ft´lbf)
(i) Install the steering wheel pad.
(See page SR-21)

SR13X-01
- STEERINGTILT STEERING COLUMN
SR-9
1893 Author
: Date
:
1997 SUPRA (RM502U)
TILT STEERING COLUMN
COMPONENTS

SR-10
- STEERINGTILT STEERING COLUMN
1894 Author
: Date
:
1997 SUPRA (RM502U)

SR13Y-01
- STEERINGTILT STEERING COLUMN
SR-1 1
1895 Author
: Date
:
1997 SUPRA (RM502U)
REMOVAL
1. REMOVE STEERING WHEEL PAD
NOTICE:
If the airbag connector is disconnected with the ignition
switch at ON or ACC, DTCs will be recorded. Never use air-
bag parts from another vehicle. When replacing parts, re-
place with new parts.
(a) Place the front wheels facing straight ahead.
(b) Using a torx socket wrench, loosen the 2 torx screws.
HINT:
Loosen the 2 screws until the groove along the screw circumfer-
ence catches on the screw case.
(c) Pull the pad out from the steering wheel and disconnect
the airbag connector.
CAUTION:
When storing the pad, keep the upper surface of the pad
facing upward. Never disassemble the pad.
NOTICE:
When removing the pad, take care not to pull the airbag
wire harness.
2. REMOVE STEERING WHEEL
(a) Disconnect the connector.
(b) Remove the wheel set nut.
(c) Place matchmarks on the wheel and main shaft.
(d) Using SST, remove the wheel.
SST 09950-50010 (09951-05010, 09952-05010,
09953-05020, 09954-05020)
3. REMOVE UPPER AND LOWER COLUMN COVERS
Remove 5 screws.