Lexus ES300 (1997 year). Service manual — part 42

AC0AE–01

N21092

N21061

AC–52

–

AIR CONDITIONING

HEATER RADIATOR

1609

1997 LEXUS ES300 (RM511U)

HEATER RADIATOR

REMOVAL

1.

DRAIN ENGINE COOLANT FROM RADIATOR

HINT:
It is not necessary to drain out all coolant.
2.

REMOVE THESE PARTS:

(a)

No.1 lower panel

(b)

Lower panel LH

3.

REMOVE HEATER RADIATOR

(a)

Release the 3 claws and remove the heater protector.

(b)

Remove 2 screws and 2 clamps.

(c)

Remove the 2 screws and 2 clips, then disconnect the
heater radiator pipes from heater radiator.

(d)

Remove 2 O–rings from heater radiator pipes.

HINT:
At the time of installation, please refer to the following item.
Do not reuse 2 O–rings.
(e)

Pull out the heater radiator.

AC0AF–01

–

AIR CONDITIONING

HEATER RADIATOR

AC–53

1610

1997 LEXUS ES300 (RM511U)

INSPECTION

INSPECT FINS FOR BLOCKAGE
If the fins are clogged, clean them with compressed air.

AC0AG–01

AC–54

–

AIR CONDITIONING

HEATER RADIATOR

1611

1997 LEXUS ES300 (RM511U)

INSTALLATION

Installation is in the reverse order of removal (See page

AC–52

).

AC0AH–01

–

AIR CONDITIONING

EXPANSION VALVE

AC–55

1612

1997 LEXUS ES300 (RM511U)

EXPANSION VALVE

ON–VEHICLE INSPECTION

1.

CHECK QUANTITY OF GAS IN REFRIGERATION CYCLE

2.

SET ON MANIFOLD GAUGE SET
(See page

AC–17

)

3.

RUN ENGINE

Run the engine at 1,500 rpm for at least 5 minutes.
Then check that the high pressure reading is 1.37 – 1.57 MPa (14 – 16 kgf/cm

2

, 199 –228 psi).

4.

CHECK EXPANSION VALVE

If the expansion valve is faulty, the low pressure reading will drop to 0 kPa (0 kgf/cm

2

, 0 psi).

HINT:
When the low pressure drops to 0 kPa (0 kgf/cm

2

, 0 pis), check the receiver’s IN and OUT sides for no tem-

perature difference.