Page 1617 of 1807

R07106
SST
W0262612° SR-48
- STEERINGPOWER STEERING GEAR
1932 Author: Date:
1997 SUPRA (RM502U)
8. INSTALL CONTROL VALVE HOUSING WITH CON-
TROL VALVE ASSEMBLY
(a) Coat a new O-ring with power steering fluid, and install
it to the housing.
(b) Using a hexagon wrench (6 mm), torque the 2 bolts.
Torque: 18 N´m (185 kgf´cm, 13 ft´lbf)
9. INSTALL BEARING, SPACER AND SELF-LOCKING
NUT
Using SST to stop the control valve shaft rotating, torque a new
nut.
SST 09616-00010
Torque: 39 N´m (400 kgf´cm, 29 ft´lbf)
10. INSTALL RACK HOUSING CAP
(a) Apply sealant to 2 or 3 threads of the cap.
Sealant:
Part No. 08833-00080, THREE BOND 1344,
LOCTITE 242 or equivalent
(b) Torque the cap.
Torque: 69 N´m (700 kgf´cm, 50 ft´lbf)
11. INSTALL RACK GUIDE SEAT, RACK GUIDE SPRING
AND RACK GUIDE SPRING CAP
(a) Apply sealant to 2 or 3 threads of the cap.
Sealant:
Part No. 08833-00080, THREE BOND 1344,
LOCTITE 242 or equivalent
(b) Temporarily install the cap.
12. ADJUST TOTAL PRELOAD
(a) To prevent the steering rack teeth from damaging the oil
seal lip, temporarily install the RH and LH rack ends.
(b) Using a hexagon wrench (24 mm), torque the rack guide
spring cap.
Torque: 25 N´m (250 kgf´cm, 18 ft´lbf)
(c) Using a hexagon wrench (24 mm), return the cap 12°.
(d) Using SST, turn the control valve shaft right and left 1 or
2 times.
SST 09616-00010
(e) Using a hexagon wrench (24 mm), loosen the cap until the
rack guide spring is not functioning.
Page 1618 of 1807

W02627
SST
Hexagon
Wrench
W02628
Hexagon Wrench
SST
Fulcrum Length
R07337
Groove
- STEERINGPOWER STEERING GEAR
SR-49
1933 Author: Date:
1997 SUPRA (RM502U)
(f) Using SST, a torque wrench and hexagon wrench (24
mm), tighten the cap until the preload is within the specifi-
cation.
SST 09616-00010
Preload (turning):
1.0 - 1.9 N´m (10 - 20 kgf´cm, 8.7 - 17.4 in.´lbf)
13. INSTALL RACK GUIDE SPRING CAP LOCK NUT
(a) Apply sealant to 2 or 3 threads of the nut.
Sealant:
Part No. 08833-00080, THREE BOND 1344,
LOCTITE 242 or equivalent
(b) Using a hexagon wrench (24 mm) to hold the rack guide
spring cap, and using SST, torque the nut.
SST 09922-10010
Torque: 50 N´m (513 kgf´cm, 37 ft´lbf)
NOTICE:
Use SST 09922-10010 in the direction shown in the illustra-
tion.
HINT:
Use a torque wrench with a fulcrum length of 345 mm (13.58
in.).
(c) Recheck the total preload.
Preload (turning):
1.0 - 1.9 N´m (10 - 20 kgf´cm, 8.7 - 17.4 in.´lbf)
(d) Remove the RH and LH rack ends.
14. INSTALL DUST COVER
15. INSTALL RH AND LH CLAW WASHERS AND RACK
ENDS
(a) Install a new claw washer, and temporarily install the rack
end.
HINT:
Align the claws of the washer with the steering rack grooves.
Page 1619 of 1807

F04167
SST Fulcrum
Length
R06400
SR4664
R07474
Clip
Clamp SR-50
- STEERINGPOWER STEERING GEAR
1934 Author: Date:
1997 SUPRA (RM502U)
(b) Using a spanner (22 mm) to hold the steering rack steady,
and using SST, torque the rack end.
SST 09922-10010
Torque: 77 N´m (782 kgf´cm, 57 ft´lbf)
NOTICE:
Use SST 09922-10010 in the direction shown in the illustra-
tion.
HINT:
Use a torque wrench with a fulcrum length of 380 mm (14.96
in.).
(c) Using a brass bar and a hammer, stake the washer.
NOTICE:
Avoid any impact to the rack.
16. INSTALL RH AND LH RACK BOOTS, CLAMPS AND
CLIPS
(a) Make sure that the steering rack hole is not clogged with
grease.
HINT:
If the hole is clogged, the pressure inside the boot will change
after it is assembled and the steering wheel turned.
(b) Install the boot.
NOTICE:
Be careful not to damage or twist the boot.
(c) Install the clamp and clip to the boot.
HINT:
When the rack guide spring cap is toward you, install the clip
and clamp in the positions shown in the illustration.
17. INSTALL RH AND LH TIE ROD ENDS AND LOCK NUTS
(a) Screw the lock nut and tie rod end onto the rack end until
the matchmarks are aligned.
(b) After adjusting toe-in, torque the nut (See page
SA-2).
Torque: 56 N´m (570 kgf´cm, 41 ft´lbf)
Page 1620 of 1807
R07105SSTFulcrum Length
- STEERINGPOWER STEERING GEAR
SR-51
1935 Author: Date:
1997 SUPRA (RM502U)
18. INSTALL 2 TURN PRESSURE TUBES
(a) Install the union seat.
(b) Using SST, install the tube.
SST 09633-00020
Torque: 24 N´m (243 kgf´cm, 18 ft´lbf)
HINT:
Use a torque wrench with a fulcrum length of 300 mm
(11.81 in.).
This torque value is effective in case that SST is parallel
to a torque wrench.
(c) Torque the union bolt over 2 new gaskets.
Torque: 34 N´m (350 kgf´cm, 25 ft´lbf)
Page 1621 of 1807

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)
Page 1622 of 1807
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
Page 1623 of 1807

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.
Page 1624 of 1807

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.