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

Vehicle Interior. Land Cruiser. Urj200, 202 Grj200 Vdj200
Heating Air Conditioning. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT FUSE (ECU-IG NO. 2)

CHECK HARNESS AND CONNECTOR (NO. 2 AIR CONDITIONING CONTROL - BODY GROUND AND BATTERY)

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - NO. 2 AIR CONDITIONING CONTROL)

CHECK NO. 2 AIR CONDITIONING CONTROL ASSEMBLY (OPERATION)

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


DESCRIPTION

This circuit consists of the No. 2 air conditioning control assembly* and the air conditioning amplifier assembly. When the No. 2 air conditioning control 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 even if the No. 2 air conditioning control assembly is operated.
HINT:
*: w/ Rear Heater

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Rear Air Conditioning Control Panel Circuit


INSPECTION PROCEDURE

1.INSPECT FUSE (ECU-IG NO. 2)

  1. Remove the ECU-IG NO. 2 fuse from the cowl side junction block LH.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    ECU-IG NO. 2 fuse
    		Always
    		Below 1 Ω


NG
REPLACE FUSE
OK


2.CHECK HARNESS AND CONNECTOR (NO. 2 AIR CONDITIONING CONTROL - BODY GROUND AND BATTERY)
Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Rear Air Conditioning Control Panel Circuit

  1. Disconnect the E55 No. 2 air conditioning control assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E55-1 (E) - Body ground
    		Always
    		Below 1 Ω
    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    E55-6 (IG) - Body ground
    		Engine switch on (IG)
    		11 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - NO. 2 AIR CONDITIONING CONTROL)
Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).Air Conditioning System (For Automatic Air Conditioning System) Rear Air Conditioning Control Panel Circuit

  1. Disconnect the E55 No. 2 air conditioning control assembly connector.

  1. Disconnect the E36 amplifier connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E36-21 (RLIN) - E55-4 (RLIN)
    		Always
    		Below 1 Ω
    E55-4 (RLIN) - Body ground
    		Always
    		10 kΩ or higher
    E36-21 (RLIN) - Body ground


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK NO. 2 AIR CONDITIONING CONTROL ASSEMBLY (OPERATION)

  1. Replace the No. 2 air conditioning control assembly with a new or properly functioning one (Click here).

  1. Operate the No. 2 air conditioning control assembly to check that it functions properly.

    OK:
    No. 2 air conditioning control assembly function operates normally.


NG
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)
OK

REPLACE NO. 2 AIR CONDITIONING CONTROL ASSEMBLY (Click here)