2003 LEXUS LS430 Diagram AC

Fig. 183: Checking Harness And Connector (Exhaust Servomotor -Rear Air Conditioning
Amplifier)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK: REPLACE REAR AIR CONDITIONING AMPLIFIER (SEE OVERHAUL
)
CIRCUIT DESCRIPTION
The rear magnetic valve is controlled by luggage room J/B ECU and A/C amplifier operation.
WIRING DIAGRAM
Fig. 184: Rear Magnetic Valve Circuit

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INSPECTION PROCEDURE
1.INSPECT LUGGAGE ROOM J/B ECU (RMGV - BODY GROUND)

CIRCUIT DESCRIPTION
This sensor detects the smoke inside the cabin and sends the appropriate signals to the luggage room J/B ECU.
WIRING DIAGRAM
Fig. 189: Smoke Sensor Circuit

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INSPECTION PROCEDURE
1.INSPECT LUGGAGE ROOM J/B ECU (RMGV - BODY GROUND)
a. Remove the luggage room J/B ECU with connectors still connected.
b. Measure the voltage according to the value (s) in the table below when applying or not applying

Fig. 193: Checking Harness And Connector (Luggage Room J/B -Smoke Sensor)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: REPLACE LUGGAGE ROOM J/B ECU
CIRCUIT DESCRIPTION
The intelligent swing register is controlled by the A/C amplifier. It is activated by selecting FACE or BI-
LEVEL on the mode select switch and turning the swing register switch on.
WIRING DIAGRAM

Fig. 3: Air Suspension System Diagram
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1.AIR SUSPENSION SYSTEM DESCRIPTION

Fig. 19: DTC C1711, C1712, C1713 And C1714 DTC Detecting Condition And Trouble Area
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
WIRING DIAGRAM

Fig. 20: Front Height Control Sensor Wiring Diagram
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INSPECTION PROCEDURE
HINT:

CIRCUIT DESCRIPTION
The acceleration sensors (assy) detect up-and-down acceleration of the vehicle. The acceleration sensors (assy)
3 in total are mounted in the absorber control ECU, at the forward of the glove compartment door at the
instrument panel safety pad position and in the rear luggage, and detect up-and down acceleration of the
vehicle, respectively. The acceleration sensors (assy) convert the resistance into electrical signals and output to
the absorber control ECU.
Fig. 47: DTC C1715 And DTC C1793 DTC Detecting Condition And Trouble Area

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HINT:
DTCs C1715 and C1791 are for the right front acceleration sensor assy.
DTCs C1716 and C1792 are for the left front acceleration sensor (left front acceleration sensor is a built-
in equipment).
DTCs C1717 and C1793 are for the rear acceleration sensor.
DTCs C1791, C1792 and C1793 are output only in the test mode.
WIRING DIAGRAM

Fig. 48: Rear Acceleration Sensor Wiring Diagram
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INSPECTION PROCEDURE
1.READ VALUE ON HAND-HELD TESTER
a. Connect the hand-held tester to the DLC3.
b. Turn the ignition switch to the ON position and turn the hand-held tester main switch on.
c. Select the item below in the DATA LIST and read its value displayed on the hand-held tester.
DATA LIST AIR SUS
d. Check that the acceleration value of the acceleration sensor observed on the hand-held tester
changes when the vehicle is bounced.
Standard:
ItemNormal condition
G (UP & DOWN) FR (Right front acceleration sensor)0 +/- 31.9 mm/s2 at still condition
G (UP & DOWN) FL (Left front acceleration sensor)0 +/- 31.9 mm/s2 at still condition
G (UP & DOWN) R (Rear acceleration sensor)0 +/- 31.9 mm/s2 at still condition