Lexus ES300 (1997 year). Manual — part 52

AC0BI–01

N20292

AC–92

–

AIR CONDITIONING

PRESSURE SWITCH

1649

1997 LEXUS ES300 (RM511U)

REMOVAL

1.

DISCHARGE REFRIGERANT FROM REFRIGERATION
SYSTEM

HINT:
At the time of installation, please refer to the following item.
Evacuate air from refrigeration system.
Charge system with refrigerant and inspect for leakage of refrig-
erant.

Specified amount: 800

±

50 g (28.22

±

1.76 oz.)

2.

REMOVE PRESSURE SWITCH FROM LIQUID TUBE

Disconnect the connector and remove the pressure switch.

Torque: 10 N·m (100 kgf·cm, 7 ft·lbf)

HINT:

Lock the switch mount on the tube with an open end
wrench, being careful not to deform the tube, and remove
the switch.

At the time of installation, please refer to the following
item.
Lubricate a new O–ring with compressor oil and install the
switch.

AC0BJ–01

–

AIR CONDITIONING

PRESSURE SWITCH

AC–93

1650

1997 LEXUS ES300 (RM511U)

INSTALLATION

Installation is in the reverse order of removal (See page

AC–92

).

Z19533

5

4

2

1

3

5

4

3

2

1

AC2T0–01

Z18060

5

3

2

1

2

5

3

1

Z12319

1

4

2

3

1

2

3

4

N02832

1

5

4

3

2

1

3

2

5

4

AC–94

–

AIR CONDITIONING

RELAY

1651

1997 LEXUS ES300 (RM511U)

RELAY

INSPECTION

1.

INSPECT HEATER MAIN RELAY
(Marking: HTR RLY) CONTINUITY

Condition

Tester connection

Specified condition

Constant

2 – 4

1 – 3

Continuity

Apply B+ between

terminals 3 and 5.

1 – 2

Continuity

If continuity is not as specified, replace the relay.

2.

INSPECT MAGNETIC CLUTCH RELAY
(Marking: MG CLT RLY) CONTINUITY

Condition

Tester connection

Specified condition

Constant

1 – 2

Continuity

Apply B+ between

terminals 1 and 2.

3 – 5

Continuity

If continuity is not as specified, replace the relay.

3.

INSPECT No.1 COOLING FAN RELAY
(Marking: FAN RLY NO.1) CONTINUITY

Condition

Tester connection

Specified condition

Constant

1 – 2

3 – 4

Continuity

Apply B+ between

terminals 1 and 2.

3 – 4

No continuity

If continuity is not as specified, replace the relay.

4.

INSPECT No. 2 COOLING FAN RELAY
(Marking: FAN RLY NO.2) CONTINUITY

Condition

Tester connection

Specified condition

Constant

1 – 2

3 – 4

Continuity

Apply B+ between termi-

nals 1 and 2

3 – 5

Continuity

If continuity is not as specified, replace the relay

Z05932

Z06166

5

3

2

1

2

5

3

1

4

4

–

AIR CONDITIONING

RELAY

AC–95

1652

1997 LEXUS ES300 (RM511U)

5.

INSPECT No.3 COOLING FAN RELAY
(Marking: FAN RLY NO.3) CONTINUITY

Condition

Tester connection

Specified condition

Constant

1 – 2

Continuity

Apply B+ between

terminals 1 and 2.

3 – 5

Continuity

If continuity is not as specified, replace the relay.

6.

INSPECT ENGINE MAIN RELAY
(Marking: ENGINE MAIN RLY) CONTINUITY

Condition

Tester connection

Specified condition

Constant

1 – 3

2 – 4

Continuity

Apply B+ between

terminals 1 and 3.

4 – 5

Continuity

If continuity is not as specified, replace the relay.