Air Conditioning System (For Manual Air Conditioning System) Rear Air Conditioning Control Panel Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK VEHICLE TYPE

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL - AIR CONDITIONING AMPLIFIER)

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL - BATTERY AND BODY GROUND)

CHECK AIR CONDITIONING CONTROL ASSEMBLY

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL - AIR CONDITIONING AMPLIFIER)

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL - BATTERY AND BODY GROUND)

CHECK AIR CONDITIONING CONTROL ASSEMBLY

AIR CONDITIONING SYSTEM (for Manual Air Conditioning System) - Rear Air Conditioning Control Panel Circuit


DESCRIPTION

This circuit consists of the air conditioning control assembly and air conditioning amplifier. When the air conditioning control assembly is operated, signals are transmitted to the air conditioning amplifier through the LIN communication system.
If the LIN communication system malfunctions, the air conditioning amplifier does not operate even if the air conditioning control assembly is operated.

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Manual Air Conditioning System) Rear Air Conditioning Control Panel Circuit


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Manual Air Conditioning System) Rear Air Conditioning Control Panel Circuit


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.CHECK VEHICLE TYPE

  1. Check the vehicle type.

    Result
    Result
    		Proceed to
    w/o Rear Seat Heater
    		A
    w/ Rear Seat Heater
    		B


B
Go to step 5
A


2.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL - AIR CONDITIONING AMPLIFIER)

  1. Disconnect the G24 amplifier connector.

  1. Disconnect the T3 control connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    T3-3 (RLIN) - G24-13 (RLIN)
    		Always
    		Below 1 Ω
    T3-3 (RLIN) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL - BATTERY AND BODY GROUND)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Manual Air Conditioning System) Rear Air Conditioning Control Panel Circuit

  1. Disconnect the T3 control connector.

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    T3-5 (IG) - T3-8 (E)
    		Ignition switch off
    		Below 1 V
    T3-5 (IG) - T3-8 (E)
    		Ignition switch ON
    		11 to 14 V

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    T3-8 (E) - Body ground
    		Always
    		Below 1 Ω
Text in Illustration
*a
Front view of wire harness connector
(to Air Conditioning Control Assembly)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK AIR CONDITIONING CONTROL ASSEMBLY

  1. Replace the air conditioning control assembly with a new or normally functioning one (LandCruiser RM0000039QL011X.html).

  1. Operate the air conditioning control assembly to check that it functions properly.

    OK:
    Air conditioning control assembly operates normally.


NG
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (LandCruiser RM0000045EC00TX.html)
OK

END (AIR CONDITIONING CONTROL ASSEMBLY IS FAULTY)

5.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL - AIR CONDITIONING AMPLIFIER)

  1. Disconnect the G24 amplifier connector.

  1. Disconnect the T7 control connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    T7-6 (RLIN) - G24-13 (RLIN)
    		Always
    		Below 1 Ω
    T7-6 (RLIN) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


6.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING CONTROL - BATTERY AND BODY GROUND)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Manual Air Conditioning System) Rear Air Conditioning Control Panel Circuit

  1. Disconnect the T7 control connector.

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    T7-1 (IG) - T7-8 (E)
    		Ignition switch off
    		Below 1 V
    T7-1 (IG) - T7-8 (E)
    		Ignition switch ON
    		11 to 14 V

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    T7-8 (E) - Body ground
    		Always
    		Below 1 Ω
Text in Illustration
*a
Front view of wire harness connector
(to Air Conditioning Control Assembly)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


7.CHECK AIR CONDITIONING CONTROL ASSEMBLY

  1. Replace the air conditioning control assembly with a new or normally functioning one (LandCruiser RM0000039QL011X.html).

  1. Operate the air conditioning control assembly to check that it functions properly.

    OK:
    Air conditioning control assembly operates normally.


NG
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (LandCruiser RM0000045EC00TX.html)
OK

END (AIR CONDITIONING CONTROL ASSEMBLY IS FAULTY)