Lin Communication System Air Conditioning Control Panel Does Not Operate


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK SWITCH OPERATION

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

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

LIN COMMUNICATION SYSTEM - Air Conditioning Control Panel does not Operate


DESCRIPTION

When a switch of the integration control and panel assembly or air conditioning control assembly* is operated, the integration control and panel assembly or air conditioning control assembly* uses LIN communication to communicate with the air conditioning amplifier. If a switch of the integration control and panel assembly or air conditioning control assembly* does not operate properly, a problem with the LIN communication between the integration control and panel assembly or air conditioning control assembly* and air conditioning amplifier may be causing the malfunction.
  1. *: w/ Rear Air Conditioning System

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Networking.Lin Communication System.Lin Communication System Air Conditioning Control Panel Does Not Operate


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Networking.Lin Communication System.Lin Communication System Air Conditioning Control Panel Does Not Operate


INSPECTION PROCEDURE

1.CHECK SWITCH OPERATION

  1. Check the switch operation.

    Result
    Result
    		Proceed to
    Integration control and panel assembly does not operate
    		A
    Air conditioning panel assembly does not operate
    		B


B
Go to step 3
A


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

  1. Disconnect the G25 air conditioning amplifier assembly connector.

  1. Disconnect the G23 integration control and panel assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    G25-37 (LIN1) - G23-3 (LIN1)
    		Always
    		Below 1 Ω
    G25-37 (LIN1) or G23-3 (LIN1) - Body ground
    		Always
    		10 kΩ or higher
    Result
    Result
    		Proceed to
    OK (for Automatic Air Conditioning System)
    		A
    OK (for Manual Air Conditioning System)
    		B
    NG
    		C


B
Go to AIR CONDITIONING SYSTEM (LandCruiser RM0000045EC00TX.html)

C
REPAIR OR REPLACE HARNESS OR CONNECTOR
A

Go to AIR CONDITIONING SYSTEM (LandCruiser RM0000045E302NX.html)

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

  1. Disconnect the G24 air conditioning amplifier assembly connector.

  1. Disconnect the T7*1 or T3*2 air conditioning control assembly connector.

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

    Standard Resistance:
    w/ Rear Seat Heater
    Tester Connection
    		Condition
    		Specified Condition
    G24-13 (RLIN) - T7-6 (RLIN)
    		Always
    		Below 1 Ω
    G24-13 (RLIN) or T7-6 (RLIN) - Body ground
    		Always
    		10 kΩ or higher
    w/o Rear Seat Heater
    Tester Connection
    		Condition
    		Specified Condition
    G24-13 (RLIN) - T3-3 (RLIN)
    		Always
    		Below 1 Ω
    G24-13 (RLIN) or T3-3 (RLIN) - Body ground
    		Always
    		10 kΩ or higher
    Result
    Result
    		Proceed to
    OK (for Automatic Air Conditioning System)
    		A
    OK (for Manual Air Conditioning System)
    		B
    NG
    		C


B
Go to AIR CONDITIONING SYSTEM (LandCruiser RM0000045EC00TX.html)

C
REPAIR OR REPLACE HARNESS OR CONNECTOR
A

Go to AIR CONDITIONING SYSTEM (LandCruiser RM0000045E302NX.html)