2003 LEXUS LS430 sensor

LOCK according to the chart above.
NG: Go to step 2
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS
TABLE
2.CHECK WIRE HARNESS (DRIVER SEAT ECU - POWER SEAT SENSOR AND BODY
GROUND)
a. Disconnect the D27 and D28 ECU connectors.
b. Disconnect the P40, P41, P42, P43, P44 and P45 sensor connectors.
c. Measure the resistance of the wire harness side connectors.
Standard:
TESTER CONNECTION AND SPECIFIED CONDITION
Tester connectionSpecified condition
D27-12 (H+) - P40-1 (UP)Below 1 ohms
D27-3 (H-) - P40-5 (DOWN)Below 1 ohms
D28-7(SSRH) - P40-4(O/P)Below 1 ohms
D28-16 (PVCC) - P40-2 (VCC)Below 1 ohms
D28-16 (PVCC) - P44-3 (VCC)Below 1 ohms
D28-13 (SSRR) - P44-1 (O/P)Below 1 ohms
D28-16 (PVCC) - P43-3 (VCC)Below 1 ohms
D28-6 (SSRV) - P43-1 (O/P)Below 1 ohms
D28-16 (PVCC) - P45-3 (VCC)Below 1 ohms
D28-5 (SSRS) -P45-1 (O/P)Below 1 ohms
D28-16 (PVCC) - P41-3 (VCC)Below 1 ohms
D28-15 (SSRC) - P41-1 (O/P)Below 1 ohms
D28-16 (PVCC) - P42-3 (VCC)Below 1 ohms
D28-14 (SSFV) - P42-1 (O/P)Below 1 ohms
D28-1 (SGND) - Body groundBelow 1 ohms
P40-3 (GND) - Body groundBelow 1 ohms
P44-2 (GND) - Body groundBelow 1 ohms
P43-2 (GND) - Body groundBelow 1 ohms
P45-2 (GND) - Body groundBelow 1 ohms
P41-2 (GND) - Body groundBelow 1 ohms
P42-2 (GND) - Body groundBelow 1 ohms

Fig. 25: Identifying D27, D28 Driver Seat ECU Connector Terminals And Power Seat Sensor
Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: GO TO NEXT STEP
3.CHECK DRIVER SEAT ECU (SENSOR POWER SOURCE VOLTAGE)
a. Turn the ignition switch ON.
b. Measure the voltage of the ECU connector.
Standard:
TESTER CONNECTION AND SPECIFIED CONDITION
Fig. 26: Identifying D28 Driver Seat ECU Connector Terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPLACE DRIVER SEAT ECU
OK: GO TO NEXT STEP
Tester connectionSpecified condition
D28-16 (PVCC) - Body ground8V

4.CHECK POWER SEAT POSITION SENSOR
a. Turn the ignition switch ON.
b. Measure the voltage of the ECU connector.
Standard:
TESTER CONNECTION AND SPECIFIED CONDITION
HINT:
Check the power seat position sensors that are malfunctioning.
Run the motors and check that the voltage readings vary within the "specified condition" shown in the
chart above.
*: If the result is not as specified proceed to steps indicated in this column.
Tester ConnectionSpecified ConditionWhen NG, proceed to*
D28-7 (SSRH) - D28-1 (GND)Varies between 0 to 8 VA
D28-13 (SSRR) - D28-1 (GND)Varies between 0 to 8 VB
D28-6 (SSRV) - D28-1 (GND)Varies between 0 to 8 VB
D28-5 (SSRS) - D28-1 (GND)Varies between 0 to 8 VB
D28-15 (SSRC) - D28-1 (GND)Varies between 0 to 8 VB
D28-14 (SSFV) - D28-1 (GND)Varies between 0 to 8 VB

g. Perform the zero point calibration of yaw rate and deceleration sensor (see CALIBRATION ).
5.INSPECT WHEEL ANGLE
a. Turn the steering wheel fully left and right to measure the turning angle.
Wheel turning angle:
WHEEL TURNING ANGLE TABLE
Fig. 10: Inspecting Wheel Angle

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
If the right and left inside wheel angles differ from the specified value, check and adjust the right and left
rack end lengths.
6.INSPECT CAMBER, CASTER AND STEERING AXIS INCLINATION
Inside wheel42° 10' (42.2°)
Outside wheel: Reference36° 15' (36.3°)

Fig. 18: Removing Absorber Control Actuator
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
4.REMOVE HEIGHT CONTROL SENSOR SUB-ASSY FRONT LH
5.SEPARATE FRONT STABILIZER LINK ASSY LH
a. Support the suspension lower arm with a jack using a wood block to avoid damage.
b. Remove the nut and washer and separate the stabilizer link assy LH.

Fig. 27: Installing Front Stabilizer Link Assy LH
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
12.INSTALL HEIGHT CONTROL SENSOR SUB-ASSY FRONT LH
13.INSTALL ABSORBER CONTROL ACTUATOR
a. Check that the rod position is as shown.

Fig. 46: Disposing Shock Absorber Assy Front LH
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
REPLACEMENT
HINT:
Use the same procedures for the RH side and LH side.
The procedures listed below are for the LH side.
1.REMOVE FRONT WHEELS
2.SEPARATE SKID CONTROL SENSOR WIRE
a. Remove the 2 bolts and separate the skid control sensor wire.