lock LEXUS SC400 1991 Service Repair Manual

(b) Remove the main shaft from the column tube.
(c) Remove the spring, thrust collar and bearing.
STEERING COLUMN INSPECTION AND
REPLACEMENT
SR0ES±03
1. INSPECT KEY CYLINDERCheck that the steering lock mechanism operates properly.
2. IF NECESSARY, REPLACE KEY CYLINDER
(a) Place the ignition key at the ACC position.
(b) Push down the stop pin with a thin rod, and pull out the key cylinder.
(c) Install a new key cylinder. HINT: Make sure the ignition key is at the ACC position.
3. INSPECT UPPER BEARING Check the upper bearing rotation condition and check for ab-
normal noise.
If the bearing is worn or damaged, replace the column upper
tube.
STEERING COLUMN ASSEMBLY
SR0ET±04
1. APPLY MOLYBDENUM DISULPHIDE LITHIUM BASEGREASE (See page SR±12)
2. INSTALL MAIN SHAFT
(a) Install the bearing, thrust collar and spring to the main shaft.
(b) Install the main shaft into the upper column tube.
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STEERING STEERING COLUMNSR±19
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6. INSTALL TILT LEVER LOCK SHAFT, TILT LEVERASSEMBLY, TILT SUB LEVER AND TILT LEVER
(a) Install the tilt lever lock shaft into the upper column tube.
(b) Install the tilt lever assembly.
(c) Install the tilt lever and tilt sub lever.
7. INSTALL TILT PAWLS
(a) Install the 2 tilt pawls to the upper column tube. HINT: Install the pawl pin into the long hole of the tilt lever and
tilt sub lever.
(b) Install the bolt through the tilt pawls and tilt lever assembly.
(c) Temporarily install the washer and nut.
(d) Install and torque the tilt lever assembly installation bolt.
Torque: 2.9 N Vm (30 kgf Vcm, 26 in. Vlbf)
8. ENGAGE AND ADJUST TILT PAWL
(a) Engage the tilt sub lever side pawl to the center of the ratchet.
(b) While turning the tilt lever side collar, completely engage the
tilt lever side pawl to the ratchet.
(c) Place matchmarks on the pawl and collar.
(d) Remove the nut and washer.
(e) Pull out the bolt.
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STEERING STEERING COLUMNSR±21
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11. INSTALL BOLT
(a) Tighten the nut with the matchmarks on the pawl and collarare aligned.
Torque: 5.9 N Vm (60 kgf Vcm, 52 in. Vlbf)
(b) Check that the pawls rotate smoothly.
12. INSTALL 3 TENSION SPRINGS
13. INSTALL COMPRESSION SPRING
(a) Install the 2 bushings to the spring.
(b) Install the spring and bolt.
(c) Using a torx wrench, tighten the bolt.
Torx wrench: T30 (Part No. 09042±00010 or locally manufac-
tured tool)
Torque: 7.8 N Vm (80 kgf Vcm, 69 in. Vlbf)
14. INSTALL 2 LOCK WEDGES TO BREAKAWAY BRACKET
NOTICE: Make sure that no grease gets on the contact
surface between the lock wedge and the lower column
tube.
15. INSTALL BREAKAWAY BRACKET
(a) Install the steering shaft thrust stopper.
(b) Install the breakaway bracket to the main shaft. Be careful that the spline part of the main shaft does not sep-
arate.
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(c) Using snap ring pliers, install the snap ring to the main shaft.
(d) Install the steering column tube stopper bolt.
Torque: 19 NVm (195 kgf Vcm, 14 ft Vlbf)
16. INSTALL TELESCOPIC LEVER LOCK BOLT
(a) Pull the steering column tube away from the breakaway
bracket and facing the body installation surface of the
breakaway bracket upward, temporarily install the lock bolt.
(b) Install a double nut on the lock bolt. Torque to 16 N Vm (160 kgf Vcm, 12 ft Vlbf), loosen once, then
torque again to 7.4 N Vm (75 kgf Vcm, 65 in. Vlbf).
17. INSTALL TELESCOPIC LEVER
(a) Install the compression spring and ball.
(b) Install the washer, lever, collar and bolt.
Torque: 25 N Vm (260 kgf Vcm, 19 ft Vlbf)
18. I N S TA L L T E L E S C O P I C L EVER SERRATION
ATTACHMENT
(a) Rotate the telescopic lever until it touches the breakaway
bracket.
(b) Install the serration attachment so that the alignment marks on the telescopic lever and the serration attachment align.
Torque: 13 N Vm (130 kgf Vcm, 9 ft Vlbf)
SR±24±
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(b) Install the lower dust cover and clip.
24. INSTALL SLIDING YOKEAlign matchmarks and install the sliding yoke to the main
shaft.
Torque: 35 N Vm (360 kgf Vcm, 26 ft Vlbf)
25. INSTALL IGNITION KEY CYLINDER ILLUMINATION
26. CHECK TILT OPERATION
(a) Check that there is not axial play at the end of the main shaft.
(b) With the main shaft in the neutral position, push the tilt lever and check that the main shaft rises to the uppermost position.
(c) Lower the main shaft, and check that it locks in the uppermost position.
27. CHECK TELESCOPIC OPERATION
(a) Check that t here is no axial play when the lever is turned fully
counterclockwise.
(b) Check that the main shaft moves smoothly when the lever is turned clockwise.
SR±26
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(c) Remove the upper tube and main shaft from the lower tube.
12. REMOVE TILT STEERING HOUSING SUPPORT
13. REMOVE MAIN SHAFT ASSEMBLY
(a) Secure the column upper tube in a vise.
NOTICE: Do not tighten the vise too tight.
(b) Using SST, compress the compression spring.SST 09950±20017 (09956±00010)
(c) Using snap ring pliers, remove the snap ring.
(b) Remove the main shaft from the upper tube.
(c) Remove the spring, thrust collar and bearing.
STEERING COLUMN INSPECTION AND
REPLACEMENT
SR0EM±03
1. INSPECT KEY CYLINDER Check that the steering lock mechanism operates properly.
SR±32
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2. IF NECESSARY, REPLACE KEY CYLINDER
(a) Place the ignition key at the ACC position.
(b) Push down the stop pin with a thin rod, and pull out the keycylinder.
(d) Install a new key cylinder. HINT: Make sure the ignition key is at the ACC position.
3. INSPECT UPPER BEARING Check the upper bearing rotation condition and check for ab-
normal noise.
If the bearing is worn or damaged, replace the column upper
tube.
4. IF NECESSARY, ADJUST TELESCOPIC ADJUSTING SCREWS
(a) Using SST, remove the lock nuts.
SST 09617±14010
(b) Using SST, tighten the adjusting screws. SST 09923±00010
Torque: 6.9 N Vm (70 kgf Vcm, 64 in. Vlbf)
NOTICE:
w If the adjusting screw is tightened higher than the
specified torque, the telescopic mechanism may
malfunction. Conversely, if the torque applied is too low,
rattling may develop in the column, so the specified
torque should always be applied.
w When the adjusting screw and conical springs have been
removed, replace the conical springs facing in the
direction shown in the illustration.
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STEERING STEERING COLUMNSR±33
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(c) Using SST, install the lock nuts.SST 09617±14010, 09923±00010
Torque: 31 N Vm (320 kgf Vcm, 23 ft Vlbf)
HINT: Use a torque wrench with a fulcrum length of 340 mm
(13.39 in.).
STEERING COLUMN ASSEMBLY
SR0EN±03
1. APPLY MOLYBDENUM DISULPHIDE LITHIUM BASE
GREASE
(See page SR±27)
2. INSTALL MAIN SHAFT
(a) Install the bearing, thrust collar and spring to the main shaft.
(b) Install the main shaft into the upper tube.
(c) Using SST to compress the compression spring. SST 09950±20017 (09956±00010)
(d) Using snap ring pliers, install a new snap ring.
3. INSTALL TILT STEERING HOUSING SUPPORT
Torque: 13 N Vm (130 kgf Vcm, 9 ft Vlbf)
4. INSTALL COLUMN UPPER TUBE WITH MAIN SHAFT
(a) Install the upper tube and main shaft into the lower tube.
SR±34
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(b) Using snap ring pliers, install the snap ring to the main shaft.
(c) Using a vise, press in the 2 tilt steering shafts.HINT: Make sure the upper tube turns smoothly.
5. INSTALL TILT STEERING GEAR ASSEMBLY WITH MOTOR
(a) Install the 2 bushings and support stopper bolts.
(b) Using a vise, press in the 2 No. 2 tilt steering shafts.
(c) Install the bushing, spring and spacer to each stopper bolt.
(d) Install the bond cable.
(e) Install and torque 2 new lock nuts.
Torque: 2.9 N Vm (30 kgf Vcm, 26 in. Vlbf)
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STEERING STEERING COLUMNSR±35
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TERMINAL OF ECU
TILT & TELESCOPIC ECU
 




Terminal
No.
 




Symbol
 




Terminal Name
 




Terminal
No.
 




Symbol
 




Terminal Name
 T9±1 Si Serial In T9±16 MSW Manual Switch
 2 DSW Door Courtesy Switch 17 Vc Sensor Power Source
 3 M1 Return Switch 1 18 ECU±B Power Source 

4
 

ASW
 

Auto Switch
 

T10± 1
 

IG
 

Ignition Switch
 5 E1 Sensor Ground 2 Te M+ Telescopic Contracted
 6 Te S Telescopic Sensor 3 TiM± Tilt Down
 
7 
TiS 
Tilt Sensor 
4 
+B 
Power Source 

8
 

ECU±E
 

Ground
 

6
 

P
 

Park/Neutral Position Switch
 9 So Serial Out 6 P Parking Brake Switch*
 10 UWSW Unlock Warning Switch 7 GND Ground 

11 

MRY 

Memory Switch 

10 

TiM+ 

Tilt Up
 12 M2 Return Switch 2 11 TiM± Telescopic Extended
*
SC300 (M/T) Models
SR±48
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