Heating Air Conditioning. Air Conditioning System (For Automatic Air Conditioning System) Air Conditioning Control Panel Does Not Operate

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 (AIR CONDITIONING CONTROL - BODY GROUND AND BATTERY)

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

CHECK AIR CONDITIONING CONTROL ASSEMBLY (OPERATION)

AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System) - Air Conditioning Control Panel does not Operate

DESCRIPTION

This circuit* consists of the air conditioning control assembly and the air conditioning amplifier assembly. When the 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 air conditioning control assembly is operated.

HINT:

*: w/o Multi-display

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) Air Conditioning Control Panel Does Not Operate

INSPECTION PROCEDURE

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

Remove the ECU-IG NO. 2 fuse from the engine room relay block.

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

REPLACE FUSE

OK

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

Disconnect the F10 air conditioning control assembly connector.

Measure the resistance and voltage according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
F10-1 (GND) - Body ground
Always
Below 1 Ω
Standard Voltage:
Tester Connection
Switch Condition
Specified Condition
F10-1 (GND) - F10-7 (IG+)
Engine switch on (IG)
11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

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

w/ Rear Heater
1. Disconnect the F10 air conditioning control assembly connector.
2. Disconnect the E36 amplifier connector.
3. Measure the resistance according to the value(s) in the table below.
  Standard Resistance:
  Tester Connection
  Condition
  Specified Condition
  E36-20 (LIN1) - F10-5 (LIN1)
  Always
  Below 1 Ω
  E36-20 (LIN1) - Body ground
  Always
  10 kΩ or higher

w/o Rear Heater
1. Disconnect the F10 air conditioning control assembly connector.
2. Disconnect the E81 amplifier connector.
3. Measure the resistance according to the value(s) in the table below.
  Standard Resistance:
  Tester Connection
  Condition
  Specified Condition
  E81-37 (LIN1) - F10-5 (LIN1)
  Always
  Below 1 Ω
  E81-37 (LIN1) - Body ground
  Always
  10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.CHECK AIR CONDITIONING CONTROL ASSEMBLY (OPERATION)

Replace the air conditioning control assembly with a new or properly functioning one.

Operate the front air conditioning control to check that it functions properly.
OK:
Air conditioning control assembly function operates normally.

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)

REPLACE AIR CONDITIONING CONTROL ASSEMBLY (Click here)

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

Tester Connection	Switch Condition	Specified Condition
F10-1 (GND) - F10-7 (IG+)	Engine switch on (IG)	11 to 14 V

Tester Connection	Condition	Specified Condition
E36-20 (LIN1) - F10-5 (LIN1)	Always	Below 1 Ω
E36-20 (LIN1) - Body ground	Always	10 kΩ or higher

Tester Connection	Condition	Specified Condition
E81-37 (LIN1) - F10-5 (LIN1)	Always	Below 1 Ω
E81-37 (LIN1) - Body ground	Always	10 kΩ or higher