clutch LEXUS LS430 2003 Factory User Guide

INSPECTION
1.INSPECT TORQUE CONVERTER CLUTCH ASSY
a. Inspect the one-way clutch.
1. Install SST so that it fits in the notch of the converter hub and outer race of the one-way
clutch.
SST 09350-30020 (09351-32020)
Fig. 55: Installing SST

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
2. Press on the serrations of the starter with a finger and rotate it.
Clean the converter and retest the one-way clutch.
When the one-way clutch is turned clockwise, it rotates freely and when turned counterclockwise, it
locks.

Fig. 56: Pressing On Serrations Of Starter
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
b. Determine the condition of the torque converter clutch assy.
1. If the inspection result of the torque converter clutch assy does not satisfy the standard
conditions, replace the torque converter clutch assy.
Malfunction item:
A metallic sound is emitted from the torque converter clutch assy during the stall test
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The one-way clutch is free or locked in both directions.
The amount of powder in the ATF is greater than the sample shown on the illust (see
the sample).
HINT:
The sample shows the auto fluid of approximately 0.25 liters (0.26 US qts, 0.22 Imp. qts) that is
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c. Change the ATF in the torque converter clutch.
1. If the ATF is discolored and/or has a foul odor, completely stir the ATF in the torque
converter clutch and drain the ATF with the torque converter facin
g up.

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
3.INSPECT RUNOUT OF TORQUE CONVERTER CLUTCH ASSY
a. Temporarily mount the torque converter clutch to the drive plate. Set up a dial indictor.
Maximum runout: 0.30 mm (0.0118 in.)
If runout exceeds the maximum, try to correct by changing the installation direction of the torque
converter clutch.
If runout cannot be corrected, replace the torque converter clutch.
HINT:
Mark the position of the torque converter clutch to reinstall it correctly.
b. Remove the torque converter clutch.
Fig. 59: Checking Runout Of Torque Converter Clutch Assy

Fig. 61: Removing 3 Magnets From Oil Pan
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
c. Examine particles in pan.
1. Collect any steel chips with the removed magnets. Carefully look at the foreign objects and
particles in the pan and on the magnets to guess at the type of wear which might be found in
the transmission. Steel (magnetic) hellip bearing, gear and clutch plate wear
Brass (non-ma
gnetic) hellip bushing wear

Fig. 74: Removing 3 Magnets From Oil Pan
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
c. Examine particles in the pan.
a. Collect any steel chips with the removed magnets. Carefully look at the foreign objects and
particles in the pan and on the magnets to guess at the type of wear which might be found in
the transmission. Steel (magnetic) hellip bearing, gear and clutch plate wear
Brass (non-ma
gnetic) hellip bushing wear

Fig. 80: Removing Check Ball Body And Spring
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
c. Remove the bolt, lock plate and lock up control solenoid (SLU) and clutch control solenoid (SL2).
d. Remove the bolt and automatic transmission 3-way solenoid assy (S3).
e. Remove the bolt and automatic transmission 3-way solenoid (S2) and automatic transmission 3-
way solenoid (S4).
f. Remove the bolt and automatic transmission 3-way solenoid (S1).
g. Remove the bolt and automatic transmission 3-way solenoid (SR).
h. Remove the bolt, lock plate and clutch control solenoid No.1 (SL1) and line pressure control
solenoid (SLT).

7.INSTALL TRANSMISSION VALVE BODY ASSY
a. Install the clutch control solenoid No.1 (SL1) and line pressure control solenoid (SLT) with the
lock plate and bolt.
Torque: 6.4 N.m (65 kgf.cm, 56 in..lbf)
b. Install the automatic transmission 3-way solenoid (SR) with the bolt.
Torque: 10 N.m (100 kgf.cm, 7 ft.lbf)
c. Install the automatic transmission 3-way solenoid (S1) with the bolt.
Torque: 10 N.m (100 kgf.cm, 7 ft.lbf)
d. Install the automatic transmission 3-way solenoid (S2) and automatic transmission 3-way solenoid
(S4) with the bolt.
Torque: 10 N.m (100 kgf.cm, 7 ft.lbf)
e. Install the automatic transmission 3-way solenoid (S3) with the bolt.
Torque: 10 N.m (100 kgf.cm, 7 ft.lbf)
f. Install the lock up control solenoid (SLU) and clutch control solenoid (SL2) with the lock plate and
bolt.
Torque: 6.4 N.m (65 kgf.cm, 56 in..lbf)

CLEARANCE SONAR SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
DTC P0748 PRESSURE CONTROL SOLENOID "A"
ELECTRICAL (SHIFT SOLENOID VALVE SL1)
DTC P0751 SHIFT SOLENOID "A" PERFORMANCE (SHIFT
SOLENOID VALVE S1)
DTC P0756 SHIFT SOLENOID "B" PERFORMANCE (SHIFT
SOLENOID VALVE S2)
DTC P0761 SHIFT SOLENOID "C" PERFORMANCE (SHIFT
SOLENOID VALVE S3)
DTC P0766 SHIFT SOLENOID "D" PERFORMANCE (SHIFT
SOLENOID VALVE S4)
DTC P0778 PRESSURE CONTROL SOLENOID "B"
ELECTRICAL (SHIFT SOLENOID VALVE SL2)
DTC P0781 1-2 SHIFT (1-2 SHIFT VALVE)
DTC P0973, P0974 SHIFT SOLENOID "A" CONTROL CIRCUIT
LOW/HIGH (SHIFT SOLENOID VALVE S1)
DTC P0976, P0977 SHIFT SOLENOID "B" CONTROL CIRCUIT
LOW/HIGH (SHIFT SOLENOID VALVE S2)
DTC P0979, P0980 SHIFT SOLENOID "C" CONTROL CIRCUIT
LOW/HIGH (SHIFT SOLENOID VALVE S3)
DTC P0982, P0983 SHIFT SOLENOID "D" CONTROL CIRCUIT
LOW/HIGH (SHIFT SOLENOID VALVE S4)
DTC P0985, P0986 SHIFT SOLENOID "E" CONTROL CIRCUIT
LOW/HIGH (SHIFT SOLENOID VALVE SR)
DTC P2714 PRESSURE CONTROL SOLENOID "D"
PERFORMANCE (SHIFT SOLENOID VALVE
SLT)
DTC P2716 PRESSURE CONTROL SOLENOID "D"
ELECTRICAL (SHIFT SOLENOID SLT)
DTC P2757 TORQUE CONVERTER CLUTCH PRESSURE
CONTROL SOLENOID PERFORMANCE (SHIFT
SOLENOID VALVE SLU)
DTC P2759 TORQUE CONVERTER CLUTCH PRESSURE
CONTROL SOLENOID CONTROL CIRCUIT
ELECTRICAL (SHIFT SOLENOID VALVE SLU)
DTCDescription
DTC B2231 FRONT LEFT SIDE SENSOR MALFUNCTION
DTC B2232 FRONT LEFT SENSOR MALFUNCTION
DTC B2233 FRONT LEFT CENTER SENSOR
MALFUNCTION
DTC B2234 FRONT RIGHT CENTER SENSOR

a. D position test:
Shift into the D position and fully depress the accelerator pedal and check the following points.
1. Check up-shift operation.
Check that 1 --> 2,2 --> 3,3 --> 4,4 --> 5 and 5 --> 6th up-shifts take place, and that the shift
points conform to the automatic shift schedule (see SERVICE DATA
).
HINT:
6th and 5th Gear Up-shift Prohibition Control
Engine coolant temperature is 55 °C (131 °F) or less and vehicle speed is at 51 km/h
(32 mph) or less. 4th Gear Up-shift Prohibition Control
Engine coolant temperature is 47 °C (117 °F) or less and vehicle speed is at 49 km/h
(30 mph) or less. Lock-up Prohibition Control
Brake pedal is depressed.
Accelerator pedal is released.
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2. Check for shift shock and slip.
Check for shock and slip at the 1 --> 2,2 --> 3, 3 --> 4, 4 --> 5 and 5 --> 6th up-shifts.
3. Check for abnormal noise and vibration.
Check for abnormal noise and vibration when up-shifting from 1 --> 2, 2 --> 3, 3 --> 4, 4 -->
5 and 5 --> 6 while driving with the shift lever in the D position, and also check while driving
in the lock-up condition.
HINT:
The check for the cause of abnormal noise and vibration must be done thoroughly as it could
also be due to loss of balance in the differential, torque converter clutch, etc.
4. Check kick-down operation.
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kick-downs take place while driving with the shift lever in the D position. Confirm that each
speed is within the applicable vehicle speed range indicated in the automatic shift schedule
(see SERVICE DATA
).
5. Check for abnormal shock and slip at kic
k-down.