2003 LEXUS LS430 clock

REMOVAL AND INSTALLATION OF BATTERY TERMINAL
a. Before performing electronic work, disconnect the battery negative (-) terminal cable in order to prevent
it from shorting and burning out.
b. When disconnecting and reconnecting the battery cable, turn the ignition switch and lighting switch off
and loosen the terminal nut completely. Perform operations without twisting or prying on the terminal.
c. When the battery terminal cable is removed, the memories of the clock, radio, DTCs, etc. are erased. So
before removing it, check and make a note of them.
INITIALIZE SYSTEM REFERENCE
System NameSee Procedure
Front Power Seat Control SystemINITIALIZATION

Fig. 73: Identifying B5 And A25 Connector Terminals
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NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: REPLACE AIRBAG SENSOR ASSY CENTER (SEE HOW TO PROCEED WITH
TROUBLESHOOTING )
6.INSPECT COMBINATION METER ASSY
a. Disconnect the clock assy connector.
b. Measure the voltage according to the value (s) in the table below.
Standard
VOLTAGE SPECIFICATIONS
NG: Go to step 8
Fig. 74: Identifying C12 Connector Terminals
Terminal NoConditionSpecified condition
C12-9 - Body groundIgnition switch ON, Passenger seat belt is unfastened10 to 14 V

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OK: GO TO NEXT STEP
7.INSPECT CLOCK ASSY
a. Disconnect the clock assy connector.
b. Measure the voltage according to the value (s) in the table below.
Standard
CLOCK ASSY CONNECTOR TERMINALS VOLTAGE SPECIFICATIONS
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
Fig. 75: Identifying Clock Assy Connector Terminals Front View
Terminal NoConditionSpecified condition
C10-7 - C10-5Ignition switch ON, Passenger seat belt is unfastened10 to 14 V

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OK: REPLACE CLOCK ASSY
8.CHECK HARNESS AND CONNECTOR (CLOCK ASSY - COMBINATION METER ASSY)
(SEE HOW TO PROCEED WITH TROUBLESHOOTING
)
a. Disconnect the C10 and C12 connectors.
b. Measure the resistance according to the value (s) in the table below.
Standard
C10 AND C12 CONNECTORS RESISTANCE SPECIFICATIONS
Tester ConnectionConditionSpecified Condition
C12-9 - C10-7AlwaysBelow 1 ohms
C12-9 - Body groundAlways10 kohms or higher

Fig. 84: Identifying Light Control Rheostat Connector Terminals
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NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: GO TO NEXT STEP
4.REPLACE DRIVER SIDE JUNCTION BLOCK
OK:
Normal operation
NG: REPLACE COMBINATION METER ASSY (SEE OVERHAUL
)
OK: END
5.INSPECT LIGHT CONTROL RHEOSTAT
a. Disconnect the light control rheostat connector.
b. Measure the voltage according to the value (s) in the table below.
Standard
LIGHT CONTROL RHEOSTAT VOLTAGE SPECIFICATIONS
NG: REPLACE LIGHT CONTROL RHEOSTAT
Terminal NoConditionSpecified condition
1 - 2Rheostat knob turned fully clockwiseApprox. 0 kohms
1 - 2Rheostat knob turned fully counterclockwiseApprox. 10 +/- 2 kohms
1 - 3AlwaysApprox. 10 +/- 2 kohms
4 - 1,3Rheostat knob turned fully counterclockwise10 kohms or higher
4 - 1,3Rheostat knob turned to fully clockwiseBelow 1 ohms

Fig. 67: Adjusting Drive Pinion Preload
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c. Using SST and a torque wrench, measure the preload.
Drive pinion preload (at starting):
New bearing:
1.5 to 2.0 N.m (15 to 21 kgf.cm, 13 to 18 in..lbf)
Reused bearing:
0.5 to 0.8 N.m (5 to 8 kgf.cm, 4.3 to 6.9 in..lbf)
HINT:
Do not apply hypoid gear oil if a new bearing is used.
Turn the bearing clockwise and counterclockwise several times to stabilize the bearing,
and then measure the backlash.
If the preload is not within the specification, adjust the rear differential drive pinion
preload or repair as necessar
y.

Fig. 73: Installing Rear Differential Side Gear Shaft Snap Ring
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b. Install a dial indicator to the differential carrier.
c. Tighten the SST bolt to alter the differential carrier's shape by approximately 0.1 mm
(0.004 in.).
SST 09571-50010
HINT:
Set the dial indicator to the rearmost position (upper side in the illustration) of
the area around where the side gear shaft oil seal is tapped in.
Tighten the SST bolt to apply the preload to the case bearing.
d. Turn the rin
g gear clockwise and counterclockwise several times.

Fig. 26: Applying Adhesive
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2. Install the valve.
Torque: 27 N.m (275 kgf.cm, 20 ft.lbf)
HINT:
After applying the specified torque, turn the valve clockwise with the port facing the direction
shown in the illustration.
b. Install the ventilation valve cover.
c. Connect the ventilation hose to the valve.