Identifying condition LEXUS LS430 2003 Factory Manual PDF

Fig. 77: Identifying Height Control Solenoid Valve Front LH Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK:
It should make an operating sound (click).
RESULT DESCRIPTION
HINT:
When a malfunction is found in the front solenoid valve, replace the height control valve sub-assy No. 1.
HEIGHT CONTROL SOLENOID VALVE REAR:
a. Disconnect the height control solenoid valve connector.
b. Measure the resistance according to the value (s) in the table below.
TESTER CONNECTION STANDARD SPECIFIED CONDITION STANDARD (RH)
OKA
NGB
Tester ConnectionSpecified Condition

TESTER CONNECTION STANDARD SPECIFIED CONDITION STANDARD (LH)
Fig. 78: Identifying Height Control Solenoid Valve Rear RH Connector Terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
c. RH:
Connect terminal 1 (SLRR) to the battery positive (+) terminal, and terminal 2 (GND) to the battery
negative (-) terminal.
d. LH:
Connect terminal 3 (SLRL) to the battery positive (+) terminal, and terminal 2 (GND) to the battery
negative (-) terminal.
e. Check the operatin
g sound of the height control solenoid valve.
1 (SLRR) - 2 (GND)10 to 14 ohms
Tester ConnectionSpecified Condition
2 (GND) - 3 (SLRL)10 to 14 ohms

CONTROL SOLENOID VALVE) (SEE ELECTRONIC CIRCUIT INSPECTION PROCEDURE)
a. Disconnect the suspension control ECU A20 or A21 connector.
b. Measure the resistance according to the value (s) in the table below.
TESTER CONNECTION STANDARD SPECIFIED CONDITION STANDARD (FRONT
RH)
Fig. 80: Identifying Suspension Control ECU Connector Terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
TESTER CONNECTION STANDARD SPECIFIED CONDITION STANDARD (FRONT
LH)
TESTER CONNECTION STANDARD SPECIFIED CONDITION STANDARD (REAR RH)
Tester ConnectionSpecified Condition
A20-16 (SLFR) - F3-3 (RH+)Below 1 ohms
A20-16 (SLFR) - Body ground10 Kohms or higher
Tester ConnectionSpecified Condition
A20-17 (SLFL) - F3-1 (LH+)Below 1 ohms
A20-17 (SLFL) - Body ground10 Kohms or higher

TESTER CONNECTION STANDARD SPECIFIED CONDITION STANDARD (REAR LH)
Fig. 81: Identifying Front Height Control Solenoid Valve Connector Terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
Tester ConnectionSpecified Condition
A21-8 (SLRR) - R18-1 (RH+)Below 1 ohms
A21-8 (SLRR) - Body ground10 Kohms or higher
Tester ConnectionSpecified Condition
A21-7 (SLRL) - R18-3 (LH+)Below 1 ohms
A21-7 (SLRL) - Body ground10 Kohms or higher

Fig. 82: Identifying Rear Height Control Solenoid Valve Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK:Go to next step
5.CHECK HARNESS AND CONNECTOR (HEIGHT CONTROL SOLENOID VALVE - BODY
GROUND) (SEE ELECTRONIC CIRCUIT INSPECTION PROCEDURE
)
a. Measure the resistance according to the value (s) in the table below.
TESTER CONNECTION STANDARD SPECIFIED CONDITION STANDARD (FRONT
RH)
TESTER CONNECTION STANDARD SPECIFIED CONDITION STANDARD (FRONT
LH)
TESTER CONNECTION STANDARD SPECIFIED CONDITION STANDARD (REAR RH)
Tester ConnectionSpecified Condition
F3-3 (RH+) - Body groundBelow 1 ohms
Tester ConnectionSpecified Condition
F3-1 (LH+) - Body groundBelow 1 ohms
Tester ConnectionSpecified Condition

TESTER CONNECTION STANDARD SPECIFIED CONDITION STANDARD (REAR LH)
Fig. 83: Identifying Front Height Control Solenoid Valve Connector Terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
R18-1 (RH+) - Body groundBelow 1 ohms
Tester ConnectionSpecified Condition
R18-3 (LH+) - Body groundBelow 1 ohms

Fig. 89: Identifying Fusible Link Block Side Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK:Go to next step
5.CHECK HARNESS AND CONNECTOR (AIR SUS RELAY - BODY GROUND) (SEE
ELECTRONIC CIRCUIT INSPECTION PROCEDURE
)
a. Measure the resistance according to the value (s) in the table below.
TESTER CONNECTION STANDARD SPECIFIED CONDITION
Tester ConnectionSpecified Condition
4 (for AIR SUS relay) - Body groundBelow 1 ohms

Fig. 93: Identifying Height Control Compressor Motor Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
3.CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL ECU - HEIGHT
CONTROL COMPRESSOR MOTOR) (SEE ELECTRONIC CIRCUIT INSPECTION
PROCEDURE )
a. Connect the height control compressor motor connector.
b. Disconnect the suspension control ECU A21 connector.
c. Measure the resistance according to the value (s) in the table below.
TESTER CONNECTION STANDARD SPECIFIED CONDITION
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
Tester ConnectionSpecified Condition
A21-17 (RM+) - A21-18 (RM-)6.4 to 7.4 ohms

Fig. 94: Identifying Suspension Control ECU Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK:Go to next step
4.CHECK HARNESS AND CONNECTOR (HEIGHT CONTROL COMPRESSOR MOTOR -
BODY GROUND) (SEE ELECTRONIC CIRCUIT INSPECTION PROCEDURE
)
a. Measure the resistance according to the value (s) in the table below.
TESTER CONNECTION STANDARD SPECIFIED CONDITION
Tester ConnectionSpecified Condition
H11-2 (E) - Body groundBelow 1 ohms

Fig. 95: Identifying Height Control Compressor Motor Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK:Go to next step
5.CHECK HARNESS AND CONNECTOR (HEIGHT CONTROL COMPRESSOR MOTOR - AIR
SUS RELAY) (SEE ELECTRONIC CIRCUIT INSPECTION PROCEDURE
)
a. Disconnect the AIR SUS relay from the fusible link block.
b. Measure the resistance according to the value (s) in the table below.
TESTER CONNECTION STANDARD SPECIFIED CONDITION
Tester ConnectionSpecified Condition
1 (B) - 2 (for AIR SUS relay)Below 1 ohms
1 (B) - Body ground10 Kohms or higher