Air Conditioning System (For Automatic Air Conditioning System) Viscous Heater With Magnet Clutch Circuit

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST USING GTS (VISCOUS HEATER)

CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 1 RELAY BLOCK, JUNCTION BLOCK - BATTERY)

INSPECT VISCOUS HEATER RELAY (VISCUS)

CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 1 RELAY BLOCK, JUNCTION BLOCK - VISCOUS HEATER WITH MAGNET CLUTCH ASSEMBLY)

CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 1 RELAY BLOCK, JUNCTION BLOCK - AIR CONDITIONING AMPLIFIER ASSEMBLY)

INSPECT VISCOUS HEATER WITH MAGNET CLUTCH ASSEMBLY

CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 1 RELAY BLOCK, JUNCTION BLOCK - VISCOUS HEATER WITH MAGNET CLUTCH ASSEMBLY)

CHECK HARNESS AND CONNECTOR (ENGINE ROOM NO. 1 RELAY BLOCK, JUNCTION BLOCK - AIR CONDITIONING AMPLIFIER ASSEMBLY)

INSPECT VISCOUS HEATER WITH MAGNET CLUTCH ASSEMBLY

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

1. Select the Active Test, use the GTS to generate a control command, and then check that the viscous heater with magnet clutch assembly operates (LandCruiser RM000002LIV040X.html).
   
   

   Air Conditioner

   Tester Display	Test Part	Control Range	Diagnostic Note
   Viscous Heater	Viscous heater with magnet clutch assembly operation	ON or OFF	-

   OK:

   The display is as specified in the normal condition column.
   

1. except 1GD-FTV, w/ Urea SCR System:
   

   
   
   

   1. Remove the VISCUS relay from the engine room No. 1 relay block, junction block.
      

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

      Standard Voltage:

      Tester Connection	Condition	Specified Condition
      VISCUS relay terminal 5 - Body ground	Ignition switch ON	11 to 14 V
      VISCUS relay terminal 2 - Body ground	Always	11 to 14 V

      Text in Illustration

      *1	VISCUS Relay
      *a	Component without relay installed (Engine Room No. 1 Relay Block, Junction Block)

2. for 1GD-FTV, w/ Urea SCR System:
   

   
   
   

   1. Remove the VISCUS relay from the engine room No. 1 relay block, junction block.
      

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

      Standard Voltage:

      Tester Connection	Condition	Specified Condition
      VISCUS relay terminal 5 - Body ground	Ignition switch ON	11 to 14 V
      VISCUS relay terminal 2 - Body ground	Always	11 to 14 V

      Text in Illustration

      *1	VISCUS Relay
      *a	Component without relay installed (Engine Room No. 1 Relay Block, Junction Block)

1. Remove the viscous heater relay (VISCUS) from engine room No. 1 relay block, junction block.
   

2. Inspect the viscous heater relay (VISCUS) (LandCruiser RM0000012HP07DX.html).
   

1. Remove the VISCUS relay from the engine room No. 1 relay block, junction block.
   

2. Disconnect the C94 viscous heater with magnet clutch assembly connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   VISCUS relay terminal 3 - C94-1	Always	Below 1 Ω
   VISCUS relay terminal 3 - Body ground	Always	10 kΩ or higher

1. Remove the VISCUS relay from the engine room No. 1 relay block, junction block.
   

2. Disconnect the G25 air conditioning amplifier assembly connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   VISCUS relay terminal 2 - G25-16 (MG+)	Always	Below 1 Ω
   VISCUS relay terminal 2 - Body ground	Always	10 kΩ or higher

1. Remove the viscous heater with magnet clutch assembly (LandCruiser RM000003AO300GX.html).
   

2. Inspect the viscous heater with magnet clutch assembly (LandCruiser RM000005TX2000X.html).
   

1. Remove the VISCUS relay from the engine room No. 1 relay block, junction block.
   

2. Disconnect the r4 viscous heater with magnet clutch assembly connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   VISCUS relay terminal 3 - r4-1	Always	Below 1 Ω
   VISCUS relay terminal 3 - Body ground	Always	10 kΩ or higher

1. Remove the VISCUS relay from the engine room No. 1 relay block, junction block.
   

2. Disconnect the G25 air conditioning amplifier assembly connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   VISCUS relay terminal 2 - G25-16 (MG+)	Always	Below 1 Ω
   VISCUS relay terminal 2 - Body ground	Always	10 kΩ or higher

1. Remove the viscous heater with magnet clutch assembly (LandCruiser RM000003AO300HX.html).
   

2. Inspect the viscous heater with magnet clutch assembly (LandCruiser RM000005TX1000X.html).