Toyota Land Cruiser

 Service Manual

Air conditioning
Rear A/C control assembly

INSPECTION

1. REMOVE REAR HEATER CONTROL ASSEMBLY

Using a screwdriver, release the 4 claws and pull out the rear heater control assembly, then disconnect the connector.

2. INSPECT ILLUMINATION OPERATION

Connect battery positive (+) lead to terminal 2 and battery negative (-) lead to terminal 21 then check that the indicators come on.

If operation is not as specified, replace the rear A/C control assembly.

3. INSPECT INDICATOR OPERATION

(a) Connect battery positive (+) lead to terminal 1 and battery negative (-) lead to all the other terminals, then check that the indicator come on, as shown in the chart.

If operation is not as specified, replace the rear A/C control assembly.

(b) Connect the positive (+) lead from the battery to terminal 2, then check where the indicators dim.

If operation is not as specified, replace the rear A/C control assembly.

4. INSPECT SWITCH CONTINUITY

Check the continuity between terminals while switch is pressed, as shown in the chart.

If continuity is not as specified, replace the rear A/C control assembly.

5. INSPECT VARIABLE RESISTOR OPERATION

(a) Measure resistance between terminal 10 and 12.

Standard resistance: 3.0 kW

(b) Gradually move the temperature control lever from "COOL" side to "WARM" side, then check that the resistance between terminal 11 and 12 increase to 3.0 kW.

If operation is not as specified, replace the rear A/C control assembly.

6. INSTALL HEATER CONTROL ASSEMBLY

Air conditioning control assembly

Air conditioning amplifier (for Rear A/C)

Air conditioning system

Air inlet temperature sensor

Air mix servomotor (for Front A/C)

Air outlet servomotor

Ambient temperature sensor

Blower unit

Blower motor control relay

Compressor and magnetic clutch

Condenser

Drive belt

Front A/C blower motor

Front A/C evaporator

Front cooling unit

Front heater unit

Heater main relay

Magnetic clutch relay

Manifold gauge set

Power transistor (for Rear Heater)

Power transistor (for Rear Cooler)

Pressure switch

Rear A/C control assembly

Rear cooling unit

Refrigerant line

Rear heater relay

Rear heater unit

Room temperature sensor (for Front A/C)

Solar sensor