Lexus GS300/400 (2000 year). Service manual — part 19

I03739

I03737

I03738

I03740

–

AIR CONDITIONING

SENSOR

AC–73

2758

3.

REMOVE AMBIENT TEMPERATURE SENSOR

(a)

Disconnect the connector.

(b)

Using a clip remover, pull out the sensor from bumper re-
inforcement.

4.

REMOVE EVAPORATOR TEMPERATURE SENSOR

(a)

Remove these parts:
(1)

No.1 under cover

(2)

No.1 safety pad
(See page

BO–91

)

(b)

Remove the evaporator temperature sensor.
(1)

Using a screwdriver, pull out the sensor with bracket
plate.

HINT:
Tape the screwdriver tip before use.

(2)

Release the 2 claws and remove the sensor from
bracket plate.

5.

REMOVE SMOG VENTILATION SENSOR

(a)

Disconnect the connector.

(b)

Remove the bolt and sensor.

AC0XL–01

AC–74

–

AIR CONDITIONING

SENSOR

2759

INSPECTION

1.

INSPECT SOLAR SENSOR CIRCUIT
Driver Side: (See page

DI–1093

)

Passnger Side: (See page

DI–1084

)

2.

INSPECT ROOM TEMPERATURE SENSOR CIRCUIT
(See page

DI–1071

)

3.

INSPECT AMBIENT TEMPERATURE SENSOR CIRCUIT
(See page

DI–1074

)

4.

INSPECT EVAPORATOR TEMPERATURE SENSOR
(See page

DI–1078

)

5.

INSPECT SMOG VENTILATION SENSOR CIRCUIT
(See page

DI–1093

)

AC0XM–01

–

AIR CONDITIONING

SENSOR

AC–75

2760

INSTALLATION

Installation is in the reverse order of removal (See page

AC–72

).

I03741

2

1

3

4

AC0XN–01

Z13470

Magnetic Clutch Control

Low Pressure Side

ON (Continuity)

181 kpa

(1.85 kgf·cm

2

, 28 psi)

OFF (No Continuity)

High Pressure Side

3,140 kpa

(32.0 kgf·cm

2

, 455 psi)

OFF (No Continuity)

Z13471

Cooling Fan Control

ON

1,520 kpa

(15.5 kgf·cm

2

, 220 psi)

(No Continuity)

(Continuity)

OFF

1,230 kpa

(12.5 kgf·cm

2

, 178 psi)

AC–76

–

AIR CONDITIONING

PRESSURE SWITCH

2761

PRESSURE SWITCH

ON–VEHICLE INSPECTION

1.

SET ON MANIFOLD GAUGE SET
(See page

AC–17

)

2.

DISCONNECT CONNECTOR FROM PRESSURE
SWITCH

3.

RUN ENGINE AT APPROX. 1,500 RPM

4.

Magnetic Clutch Control:
INSPECT PRESSURE SWITCH OPERATION

(a)

Connect the positive (+) lead from the ohmmeter to termi-
nal 4 and the negative (–) lead to terminal 1.

(b)

Check continuity between terminals when refrigerant
pressure is changed, as shown in the illustration.

If operation is not as specified, replace the pressure switch.

5.

Cooling Fan Control:
INSPECT PRESSURE SWITCH OPERATION

(a)

Connect the positive (+) lead from the ohmmeter to termi-
nal 2 and the negative (–) lead to terminal 3.

(b)

Check continuity between terminals when refrigerant
pressure is changed, as shown in the illustration.

If operation is not as specified, replace the pressure switch.
6.

STOP ENGINE AND SET OFF MANIFOLD GAUGE SET

7.

CONNECT CONNECTOR TO PRESSURE SWITCH