2003 LEXUS LS430 air conditioning

Fig. 194: Intelligent Swing Register Circuit
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
1.INSPECT AIR CONDITIONING AMPLIFIER
a. Remove the A/C amplifier with connectors still connected.
b. Measure the voltage according to the value (s) in the table below.
Standard:
AIR CONDITIONING AMPLIFIER VOLTAGE
Specified

NG: Go to STEP 2
Fig. 195: Inspecting Air Conditioning Amplifier

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK: Go to STEP 3
2.INSPECT INTELLIGENT SWING REGISTER STEP MOTOR
a. Remove the intelligent swing register.
b. Measure the resistance according to the value (s) in the table below.
Standard:
INTELLIGENT SWING REGISTER STEP MOTOR RESISTANCE
Tester connectionConditioncondition
A12-24 (PS+B) -
Body groundTurn the ignition switch to ON position Turn the mode selector to
FACE or B/L position Swing switch is pressed10 to 14 V
Tester connectionConditionSpecified condition
I18-9 - I18-3 (2)Always279 to 321 ohms

HINT:
(): Passenger side
NG: REPLACE INTELLIGENT SWING REGISTER
Fig. 196: Inspecting Intelligent Swing Register Step Motor

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK: Go to next step
3.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - INTELLIGENT
SWING REGISTER) (SEE ELECTRONIC CIRCUIT INSPECTION PROCEDURE
)
a. Measure the resistance according to the value (s) in the table below.
Standard:
I18-9 - I18-4 (1)Always279 to 321 ohms
I18-9 - I18-5 (6)Always279 to 321 ohms
I18-9 - I18-10 (7)Always279 to 321 ohms

AIR CONDITIONING AMPLIFIER - INTELLIGENT SWING REGISTER RESISTANCE
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
Tester connectionConditionSpecified condition
A12-1 (DS1) - I18-3AlwaysBelow 1 ohms
A12-1 (DS1) - Body groundAlways10 kohms or higher
A12-2 (DS2) - I18-4AlwaysBelow 1 ohms
A12-2 (DS2) - Body groundAlways10 kohms or higher
A12-8 (DS3) - I18-5AlwaysBelow 1 ohms
A12-8 (DS3) - Body groundAlways10 kohms or higher
A12-9 (DS4) - I18-10AlwaysBelow 1 ohms
A12-9 (DS4) - Body groundAlways10 kohms or higher
A12-24 (PS+B) - I18-9AlwaysBelow 1 ohms
A12-24 (PS+B) - Body groundAlways10 kohms or higher
A12-3 (PS1) - I18-2AlwaysBelow 1 ohms
A12-3 (PS1) - Body groundAlways10 kohms or higher
A12-4 (PS2) - I18-1AlwaysBelow 1 ohms
A12-4 (PS2) - Body groundAlways10 kohms or higher
A12-5 (PS3) - I18-6AlwaysBelow 1 ohms
A12-5 (PS3) - Body groundAlways10 kohms or higher
A12-6 (PS4) - I18-7AlwaysBelow 1 ohms
A12-6 (PS4) - Body groundAlways10 kohms or higher

Fig. 197: Checking Harness And Connector (Air Conditioning Amplifier - Intelligent Swing
Register)

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK: REPLACE AIR CONDITIONING AMPLIFIER (SEE REPLACEMENT
)

HINT:
If you cannot add the listed amount of fluid, do the following:
1. Install the refill plug.
2. Allow the engine to idle with air conditioning OFF.
3. Move the shift lever through entire gear range to circulate fluid.
4. Wait for 30 seconds with the engine idling.
5. Stop the engine.
6. Remove the refill plug and add fluid.
7. Reinstall the refill plug.
4.FLUID CIRCULATION
a. Allow the engine to idle with the air conditioning OFF.
b. Move the shift lever through entire gear range to circulate fluid.
5.FLUID TEMPERATURE CHECK
a. With hand-held tester
1. Connect the han
d-held tester to the DLC3.
Output shaft oil seal replacement0.4 liters (0.42 US qts, 0.35 Imp. qts)
Transmission pan and drain plug removal1.3 liters (1.37 US qts, 1.14 Imp. qts)
Transmission valve body removal3.9 liters (4.12 US qts, 3.43 Imp. qts)
Torque converter replacement5.3 liters (5.60 US qts, 4.66 Imp. qts)
Entire transmission assembly7.2 liters (7.61 US qts, 6.34 Imp. qts)

Fig. 2: Identifying Engine Room No. 1 Junction & Relay Block Components
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Engine Room No. 1 Junction & Relay Block Fuses
FuseSystem
7.5AA/C IGAutomatic Air Conditioning (Front)
7.5AEFI NO.2Engine Control
7.5AFR IGABS
Automatic Air Conditioning (Front)
Back-Up Light
Charging
Clock (w/ LEXUS Navigation System)
Cruise Control
Door Closer (w/ Smart Key System)
Door Closer (w/o Smart Key System)
Door Lock Control (w/ Smart Key System)
Door Lock Control (w/o Smart Key System)