2003 LEXUS LS430 Identifying ac

Fig. 101: Identifying Height Control Solenoid Valve Rear RH Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
RESULT DESCRIPTION
HINT:
When a malfunction is found in the rear solenoid valve, replace the height control valve sub-assy No. 2.
HEIGHT CONTROL SOLENOID VALVE REAR LH:
a. Disconnect the height control solenoid valve connector.
b. Connect terminal 3 (SLRL) to the battery positive (+) terminal, and terminal 2 (GND) to the battery
negative (-) terminal.
c. Check the operating sound of the height control solenoid valve.
OK:
It should make an operating sound (click).
OKA
NGC

RESULT DESCRIPTION
HINT:
When a malfunction is found in the rear solenoid valve, replace the height control valve sub-assy No. 2.
B: REPLACE HEIGHT CONTROL VALVE SUB-ASSY NO. 1 (SEE REPLACEMENT
)
C: REPLACE HEIGHT CONTROL VALVE SUB-ASSY NO. 2 (SEE REPLACEMENT
)
A:Go to next step
Fig. 102: Identifying Height Control Solenoid Valve Rear LH Connector Terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
9.INSPECT EXHAUST SOLENOID VALVE
a. Disconnect the exhaust solenoid valve connector.
b. Connect terminal 1 (SLEX) to the battery positive (+) terminal, and terminal 2 (GND) to the battery
ne
gative (-) terminal.
OKA
NGC

c. Check the operating sound of the exhaust solenoid valve.
OK:
It should make an operating sound (click).
HINT:
When a malfunction is found in the exhaust solenoid valve, replace the height control compressor assy.
NG: REPLACE HEIGHT CONTROL COMPRESSOR ASSY (SEE REPLACEMENT
)
OK:Go to next step
Fig. 103: Identifying Exhaust Solenoid Valve Connector Terminals

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 105: Identifying Height Control Solenoid Valve Front RH Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
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 FRONT LH:
a. Disconnect the height control solenoid valve connector.
b. Connect terminal 1 (SLFL) to the battery positive (+) terminal, and terminal 2 (GND) to the battery
negative (-) terminal.
c. Check the operating sound of the height control solenoid valve.
OK:
It should make an operating sound (click).
OKA
NGB

Fig. 106: Identifying Height Control Solenoid Valve Front LH Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
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 RH:
a. Disconnect the height control solenoid valve connector.
b. Connect terminal 1 (SLRR) to the battery positive (+) terminal, and terminal 2 (GND) to the battery
negative (-) terminal.
c. Check the operating sound of the height control solenoid valve.
OK:
It should make an operating sound (click).
OKA
NGB

Fig. 107: Identifying Height Control Solenoid Valve Rear RH Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
RESULT DESCRIPTION
HINT:
When a malfunction is found in the rear solenoid valve, replace the height control valve sub-assy No. 2.
HEIGHT CONTROL SOLENOID VALVE REAR LH:
a. Disconnect the height control solenoid valve connector.
b. Connect terminal 3 (SLRL) to the battery positive (+) terminal, and terminal 2 (GND) to the battery
negative (-) terminal.
c. Check the operating sound of the height control solenoid valve.
OK:
It should make an operating sound (click).
OKA
NGC

Fig. 108: Identifying Height Control Solenoid Valve Rear LH Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
RESULT DESCRIPTION
HINT:
When a malfunction is found in the rear solenoid valve, replace the height control valve sub-assy No. 2.
B: REPLACE HEIGHT CONTROL VALVE SUB-ASSY NO. 1 (SEE REPLACEMENT
)
C: REPLACE HEIGHT CONTROL VALVE SUB-ASSY NO. 2 (SEE REPLACEMENT
)
A:Go to next step
5.INSPECT EXHAUST SOLENOID VALVE
a. Disconnect the exhaust solenoid valve connector.
b. Connect terminal 3 (SLEX) to the battery positive (+) terminal, and terminal 2 (GND) to the battery
ne
gative (-) terminal.
OKA
NGC

POWER SOURCE CIRCUIT ).
NG: REPAIR CIRCUIT INDICATED BY OUTPUT CODE
OK:Go to next step
2.CHECK HARNESS AND CONNECTOR (HEIGHT CONTROL SENSOR SUB-ASSY POWER
SOURCE) (SEE ELECTRONIC CIRCUIT INSPECTION PROCEDURE
)
a. Disconnect the height control sensor sub-assy connector.
b. Turn the ignition switch to the ON position.
c. Measure the voltage 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 CONNECTION STANDARD SPECIFIED CONDITION STANDARD (REAR LH)
NG: CHECK HEIGHT CONTROL SENSOR SUB-ASSY CIRCUIT (SEE DTC C1711 RIGHT
FRONT HEIGHT CONTROL SENSOR CIRCUIT, DTC C1712 LEFT FRONT HEIGHT
CONTROL SENSOR CIRCUIT,DTC C1713 RIGHT REAR HEIGHT CONTROL SENSOR
CIRCUIT, DTC C1714 LEFT REAR HEIGHT CONTROL SENSOR CIRCUIT )
Fig. 110: Identifying Front Height Control Sensor Sub
-Assy Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Tester ConnectionSpecified Condition
H14-1 (SHB) - H14-4 (SHG)4.5 to 5.5 V
Tester ConnectionSpecified Condition
H13-1 (SHB) - H13-4 (SHG)4.5 to 5.5 V
Tester ConnectionSpecified Condition
H31-1 (SHB) - H31-3 (SHG)4.5 to 5.5 V
Tester ConnectionSpecified Condition
H30-1 (SHG) - H30-3 (SHB)4.5 to 5.5 V