Air Conditioning System (For Automatic Air Conditioning System) Air Conditioning Control Panel Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

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

CHECK HARNESS AND CONNECTOR (INTEGRATION CONTROL AND PANEL - BATTERY AND BODY GROUND)

REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY

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


DESCRIPTION

This circuit consists of the integration control and panel assembly and air conditioning amplifier assembly. When the integration control and panel assembly is operated, signals are transmitted to the air conditioning amplifier assembly through the LIN communication system.
If the LIN communication system malfunctions, the air conditioning amplifier assembly does not operate when the integration control and panel 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 Automatic Air Conditioning System) 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 HARNESS AND CONNECTOR (INTEGRATION CONTROL AND PANEL - AIR CONDITIONING AMPLIFIER)

  1. Disconnect the G25 amplifier connector.

  1. Disconnect the G23 panel connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    G23-3 (LIN1) - G25-37 (LIN1)
    		Always
    		Below 1 Ω
    G23-3 (LIN1) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.CHECK HARNESS AND CONNECTOR (INTEGRATION CONTROL AND PANEL - 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 Automatic Air Conditioning System) Air Conditioning Control Panel Circuit

  1. Disconnect the G23 panel connector.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    G23-1 (+B) - G23-4 (GND)
    		Always
    		11 to 14 V
    G23-5 (IG) - G23-4 (GND)
    		Ignition switch off
    		Below 1 V
    G23-5 (IG) - G23-4 (GND)
    		Ignition switch ON
    		11 to 14 V
    G23-6 (ACC) - G23-4 (GND)
    		Ignition switch ACC
    		11 to 14 V

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    G23-4 (GND) - Body ground
    		Always
    		Below 1 Ω
Text in Illustration
*a
Front view of wire harness connector
(to Integration Control and Panel Assembly)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY

  1. Replace the integration control and panel assembly with a new or normally functioning one (LandCruiser RM000003B4601YX.html).

  1. Operate the integration control and panel assembly to check that it functions properly.

    OK:
    Integration control and panel assembly operates normally.


NG
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (LandCruiser RM0000045E302NX.html)
OK

END (INTEGRATION CONTROL AND PANEL ASSEMBLY IS FAULTY)