Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Reassembly

REASSEMBLY

PROCEDURE

1. INSTALL NO. 1 COOLER THERMISTOR

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2. INSTALL NO. 1 COOLER EVAPORATOR SUB-ASSEMBLY

(a) Install a new No. 1 cooler evaporator sub-assembly with No. 1 cooler thermistor to the upper heater case. NOTICE: When the No. 1 cooler evaporator sub-assembly is removed, make sure to install a new one. The No. 1 cooler evaporator sub-assembly cannot be reused.

(b) Engage the 2 clamps.

(c) Engage the 10 claws to install the upper heater case with No. 1 cooler evaporator sub-assembly to the lower heater case.

(d) Install the 2 screws.

3. INSTALL COOLER EXPANSION VALVE

(a) Sufficiently apply compressor oil to 2 new O-rings and the fitting surfaces of the No. 1 cooler evaporator sub-assembly.

Compressor Oil:

ND-OIL 12 or equivalent

(b) Install the 2 O-rings to the No. 1 cooler evaporator sub-assembly.

NOTICE:

Keep the O-rings and O-ring fitting surfaces free of foreign matter.

(c) Using a 4 mm hexagon socket wrench, install the cooler expansion valve with the 2 hexagon bolts. Torque: 3.5 N·m {36 kgf·cm, 31 in·lbf}

4. INSTALL COOLING UNIT PARTS

(a) Install the cooling unit parts.

5. INSTALL HEATER RADIATOR UNIT SUB-ASSEMBLY

Install in this Direction

(a) Install the heater radiator unit sub-assembly as shown in the illustration.

(b) Engage the 4 claws to install the heater clamp.

6. INSTALL HEATER GROMMET

(a) Install the heater grommet.

7. INSTALL NO. 2 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY

(a) Using the reference points, install the No. 2 air conditioning radiator damper servo sub-assembly with the 2 screws.

*a Reference Point

8. INSTALL NO. 3 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY

(a) Connect the 3 links of the No. 3 air conditioning radiator damper servo sub-assembly to the 3 links of the air conditioning radiator assembly as shown in the illustration.

*a Link

(b) Install the No. 3 air conditioning radiator damper servo sub-assembly with the 2 screws.

9. INSTALL NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY

(a) Align each gear on the air conditioner radiator assembly as shown in the illustration, and then check that the gears of the No. 1 air conditioning radiator damper servo sub-assembly are aligned as shown in the illustration.

(b) Using the reference points, install the No. 1 air conditioning radiator damper servo sub-assembly with the 3 screws.

10. INSTALL AIR CONDITIONING AMPLIFIER ASSEMBLY

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11. INSTALL DRAIN COOLER HOSE

(a) Align the hose notch with the rib as shown in the illustration and install the drain cooler hose.

*a Hose Notch *b Rib

12. INSTALL AIR CONDITIONING HARNESS ASSEMBLY

(a) Engage each clamp.

(b) Connect each connector to install the air conditioning harness assembly.

13. INSTALL HEATER COVER (w/o PTC Heater)

Install in this Direction

(a) Engage the guide to install the heater cover as shown in the illustration.

14. INSTALL QUICK HEATER ASSEMBLY (w/ PTC Heater)

Install in this Direction

(a) Engage the guide to install the quick heater assembly as shown in the illustration.

15. INSTALL NO. 2 HEATER COVER

(a) Engage the guide and claw.

(b) Install the No. 2 heater cover with the screw.

16. INSTALL BLOWER ASSEMBLY

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17. INSTALL ID CODE BOX (IMMOBILISER CODE ECU)

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18. INSTALL ASPIRATOR

(a) Engage the 2 claws to install the aspirator.

19. INSTALL NO. 5 AIR DUCT SUB-ASSEMBLY

(a) Engage the 3 claws.

(b) Install a new No. 5 air duct sub-assembly with the screw.