2003 LEXUS LS430 battery replacement

overheating etc.
9.DO NOT OPERATE ENGINE AND COMPRESSOR WITH NO REFRIGERANT
10.SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
The LEXUS LS430 is equipped with an SRS (Supplemental Restraint system) such as the driver, front
passenger, side, curtain shield air bags etc.. Failure to carry out service operation in the correct sequence
could cause the SRS to unexpectedly deploy during servicing, possibly leading to a serious accident.
Before servicing (including removal or installation of parts, inspection or replacement), be sure to read
the precautionary notices in PRECAUTION
.
11.PRECAUTION FOR DISCONNECTING THE BATTERY CABLE
DISCONNECTING BATTERY CABLE
LOCATION
System NameProceed To
Front Power Seat Control SystemINITIALIZATION

INSPECTION
1.CHECK EVAPORATOR AND HEATER RADIATOR FINS FOR FOREIGN MATTER
If foreign matter is attached to the fin, blow it off with compressed air.
2.CHECK FITTINGS FOR CRACKS OR SCRATCHES
a. Repair as necessary.
3.INSPECT EVAPORATOR TEMPERATURE SENSOR CIRCUIT (See DTC B1413:
EVAPORATOR TEMPERATURE SENSOR CIRCUIT )
4.INSPECT COOL AIR BYPASS DAMPER POSITION SENSOR CIRCUIT (DRIVER SIDE) (See
DTC B1434: MAX COOL DAMPER POSITION SENSOR CIRCUIT (DRIVER SIDE)
)
5.INSPECT COOL AIR BYPASS DAMPER CONTROL SERVOMOTOR CIRCUIT (DRIVER
SIDE) (See COOL AIR BYPASS DAMPER CONTROL SERVOMOTOR CIRCUIT (DRIVER
SIDE) )
6.INSPECT COOL AIR BYPASS DAMPER POSITION SENSOR CIRCUIT (PASSENGER SIDE)
(See COOL AIR BYPASS DAMPER CONTROL SERVOMOTOR CIRCUIT (PASSENGER
SIDE) )
7.INSPECT COOL AIR BYPASS DAMPER CONTROL SERVOMOTOR CIRCUIT (PASSENGER
SIDE) (SEE COOL AIR BYPASS DAMPER CONTROL SERVOMOTOR CIRCUIT
(PASSENGER SIDE) )
8.INSPECT WATER VALVE CONTROL SERVOMOTOR CIRCUIT (See WATER VALVE
CONTROL SERVOMOTOR CIRCUIT )
9.INSPECT AIR VENT MODE DAMPER CONTROL SERVOMOTOR CIRCUIT (See AIR VENT
MODE DAMPER CONTROL SERVOMOTOR CIRCUIT )
10.INSPECT AIR MIX DAMPER CONTROL SERVOMOTOR CIRCUIT (See AIR MIX DAMPER
CONTROL SERVOMOTOR CIRCUIT )
OVERHAUL
HINT:
Installation is in the reverse order of removal.
See COMPONENTS .
1.DISCONNECT NEGATIVE TERMINAL CABLE FROM BATTERY
2.EVACUATE REFRIGERANT HFC-134A (R134A) (See REPLACEMENT
)
3.DRAIN ENGINE COOLANT FROM RADIATOR
HINT:
It is not necessar
y to drain out all coolant.

Fig. 70: Installing Suction Tube Sub-Assy B
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
40.CONNECT NEGATIVE TERMINAL CABLE TO BATTERY
41.ADD ENGINE COOLANT (See REPLACEMENT
)
42.CHARGE REFRIGERANT (See REPLACEMENT
)
43.WARM UP ENGINE
44.CHECK FOR ENGINE COOLANT LEAKS (See REPLACEMENT
)
45.INSPECT FOR REFRIGERANT LEAKAGE (See REPLACEMENT
)
COMPONENTS

Installation is in the reverse order of removal.
See COMPONENTS .
1.DISCONNECT NEGATIVE TERMINAL CABLE FROM BATTERY
2.REMOVE FRONT DOOR SCUFF PLATE LH (See REPLACEMENT
)
3.REMOVE FRONT PILLAR GARNISH LH (See step 33 in REPLACEMENT
)
4.REMOVE INSTRUMENT PANEL UNDER COVER SUB-ASSY NO. 2 (See step 21 in
REPLACEMENT
)
5.REMOVE INSTRUMENT PANEL GARNISH SUB-ASSY RH (See step 22 in REPLACEMENT
)
6.REMOVE GLOVE COMPARTMENT DOOR ASSY W/ INSTRUMENT PANEL AIRBAG ASSY
LOWER NO. 2 (See step 25 in REPLACEMENT
)
7.REMOVE AIR SUSPENSION AND HEADLIGHT BEAM LEVEL CONTROL ECU
a. Disconnect the connectors.
b. Remove the 2 nuts and air suspension and headlight beam level control ECU.
8.REMOVE BLOWER ASSY
a. Disconnect the connectors.
b. Remove the nut and 3 bolts.
c. Remove the blower assy.

Fig. 76: Inspecting Solenoid Of Externally Changeable Compressor
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
REPLACEMENT
1.DISCONNECT NEGATIVE TERMINAL CABLE FROM BATTERY
2.EVACUATE REFRIGERANT HFC-134A (R134A) (See REPLACEMENT
)
3.REMOVE AIR CLEANER INLET NO. 1 (See REPLACEMENT
)
4.REMOVE FAN AND GENERATOR V BELT (See REPLACEMENT
)
5.REMOVE ENGINE UNDER COVER NO. 1
6.DISCONNECT COOLER REFRIGERANT DISCHARGE HOSE NO. 1
a. Remove the nut and disconnect the cooler refrigerant discharge hose No. 1.
b. Remove the O-ring from the cooler refrigerant discharge hose No. 1.

Fig. 85: Installing Cooler Refrigerant Discharge Hose No. 1
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
16.INSTALL FAN AND GENERATOR V BELT (See REPLACEMENT
)
17.INSTALL AIR CLEANER INLET NO. 1 (See step 25 in REPLACEMENT
)
18.CONNECT NEGATIVE TERMINAL CABLE TO BATTERY
19.CHARGE REFRIGERANT (See REPLACEMENT
)
20.WARM UP ENGINE
21.INSPECT FOR REFRIGERANT LEAKAGE (See REPLACEMENT
)
ON-VEHICLE INSPECTION
1.INSPECT COOLER CONDENSER ASSY
a. If the fins of the cooler condenser assy are dirty, clean them with water and dry them with

Fig. 87: Identifying Cooler Condenser Assy Components And Replacements (2 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OVERHAUL
HINT:
Installation is in the reverse order of removal.
See COMPONENTS .
1.DISCONNECT NEGATIVE TERMINAL CABLE FROM BATTERY
2.EVACUATE REFRIGERANT HFC-134A (R134A) (See REPLACEMENT
)
3.REMOVE AIR CLEANER INLET NO. 1 (See REPLACEMENT
)
4.REMOVE AIR CLEANER ASSY (See REPLACEMENT
)
5.DISCONNECT DISCHARGE HOSE SUB-ASSY NO. 1
a. Remove the bolt and disconnect the discharge hose sub-assy No. 1 from the condenser assy.
b. Remove the O-ring from the discharge hose sub-assy No. 1.

Fig. 103: Installing Discharge Hose Sub-Assy No. 1
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
17.CONNECT NEGATIVE TERMINAL CABLE TO BATTERY
18.CHARGE REFRIGERANT (See REPLACEMENT
)
19.WARM UP ENGINE
20.INSPECT FOR REFRIGERANT LEAKAGE (See REPLACEMENT
)
ON-VEHICLE INSPECTION
1.INSPECT EXPANSION VALVE
a. Check quantity of gas during refrigeration cycle.
b. Set on manifold gauge set.
c. Run engine.
1. Run the engine at 1,500 rpm for at least 5 minutes.
2. Then check that the high pressure reading is 1.37 to 1.57 Mpa (14 to 16 kgf.cm
2 , 199 to 288
psi).