Toyota
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

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

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

(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.

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

(b) Connect the positive (+) lead from the battery to terminal

(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,

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.

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.

(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

    More about Air conditioning:

    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

    Toyota Land Cruiser Service Manual / Air conditioning / Rear A/C control assembly

    Toyota Land Cruiser Service Manual

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