Heating Air Conditioning. Air Conditioning System (For Automatic Air Conditioning System) Air Conditioning Compressor Magnetic Clutch Circuit

Vehicle Interior. Land Cruiser. Urj200, 202 Grj200 Vdj200

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CAN COMMUNICATION SYSTEM

READ VALUE USING INTELLIGENT TESTER (A/C SIGNAL)

INSPECT FUSE (A/C IG)

INSPECT MAGNETIC CLUTCH RELAY

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BATTERY)

INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY

INSPECT COOLER COMPRESSOR ASSEMBLY

INSPECT MAGNETIC CLUTCH

CHECK HARNESS AND CONNECTOR (ENGINE ROOM RELAY BLOCK - BATTERY)

AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System) - Air Conditioning Compressor Magnetic Clutch Circuit

DESCRIPTION

When the air conditioning amplifier assembly is turned on, a magnetic clutch on signal is sent from the MGC terminal of the air conditioning amplifier assembly. Then, the magnetic clutch relay turns on to operate the magnetic clutch.

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 Compressor Magnetic Clutch Circuit

INSPECTION PROCEDURE

1.CHECK CAN COMMUNICATION SYSTEM

Check for CAN communication system DTCs related to the air conditioning system.
Result
Result
Proceed to
CAN DTC is not output
A
CAN DTC is output (for LHD)
B
CAN DTC is output (for RHD)
C

Result
Result	Proceed to
CAN DTC is not output	A
CAN DTC is output (for LHD)	B
CAN DTC is output (for RHD)	C

GO TO CAN COMMUNICATION SYSTEM (Click here)

A

2.READ VALUE USING INTELLIGENT TESTER (A/C SIGNAL)

Use the Data List to check if the A/C switch is functioning properly.

Engine
Tester Display
Measurement Item/Range
Normal Condition
Diagnostic Note
A/C Signal
A/C signal / ON or OFF
ON: A/C switch on
OFF: A/C switch off
-
OK:
The display is as specified in the normal condition.

Engine
Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
A/C Signal	A/C signal / ON or OFF	ON: A/C switch on OFF: A/C switch off	-

Go to step 3

REPLACE ECM (Click here)

3.INSPECT FUSE (A/C IG)

Remove the A/C IG fuse from the cowl side junction block LH.

Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
A/C IG fuse
Always
Below 1 Ω

REPLACE FUSE (A/C IG)

OK

4.INSPECT MAGNETIC CLUTCH RELAY

Remove the magnetic clutch relay 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
3 - 5
Voltage not applied to terminals 1 and 2
10 kΩ or higher
3 - 5
Voltage applied to terminals 1 and 2
Below 1 Ω

Install the magnetic clutch relay to the engine room relay block.

REPLACE MAGNETIC CLUTCH RELAY

OK

5.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BATTERY)

w/ Rear Heater
1. Disconnect the E36 amplifier connector.
2. Measure the voltage according to the value(s) in the table below.
  Standard Voltage:
  Tester Connection
  Switch Condition
  Specified Condition
  E36-18 (MGC) - Body ground
  Engine switch off
  Below 1 V
  E36-18 (MGC) - Body ground
  Engine switch on (IG)
  11 to 14 V

w/o Rear Heater
1. Disconnect the E81 amplifier connector.
2. Measure the voltage according to the value(s) in the table below.
  Standard Voltage:
  Tester Connection
  Switch Condition
  Specified Condition
  E81-20 (MGC) - Body ground
  Engine switch off
  Below 1 V
  E81-20 (MGC) - Body ground
  Engine switch on (IG)
  11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

6.INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY

w/ Rear Heater
1. Reconnect the E36 amplifier connector.
2. Measure the voltage according to the value(s) in the table below.
  Standard Voltage:
  Tester Connection
  Switch Condition
  Specified Condition
  E36-18 (MGC) - Body ground
  Engine switch on (IG)
  A/C switch off
  11 to 14 V
  E36-18 (MGC) - Body ground
  Engine switch on (IG)
  A/C switch on
  Below 1 V

w/o Rear Heater
1. Reconnect the E81 amplifier connector.
2. Measure the voltage according to the value(s) in the table below.
  Standard Voltage:
  Tester Connection
  Switch Condition
  Specified Condition
  E81-20 (MGC) - Body ground
  Engine switch on (IG)
  A/C switch off
  11 to 14 V
  E81-20 (MGC) - Body ground
  Engine switch on (IG)
  A/C switch on
  Below 1 V

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)

OK

7.INSPECT COOLER COMPRESSOR ASSEMBLY

Disconnect the C30 compressor connector.

Disconnect the A magnetic clutch connector.

Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
C30-3 (MG+) - A-1
Always
Below 1 Ω
C30-3 (MG+) - Body ground
Always
10 kΩ or higher

REPLACE COOLER COMPRESSOR ASSEMBLY (Click here)

OK

8.INSPECT MAGNETIC CLUTCH

Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
A-1 - Body ground
20°C (68°F)
3.4 to 3.8 Ω

When connector terminal A-1 is connected to the positive (+) battery terminal, check that the following occurs: 1) the operating sound of the magnetic clutch can be heard, and 2) the hub and rotor of the magnetic clutch lock.

REPLACE MAGNETIC CLUTCH

OK

9.CHECK HARNESS AND CONNECTOR (ENGINE ROOM RELAY BLOCK - BATTERY)

Remove the magnetic clutch relay from the engine room relay block.

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
Relay block magnetic clutch relay terminal 5 - Body ground	Engine switch on (IG)	11 to 14 V
Relay block magnetic clutch relay terminal 1 - Body ground	Engine switch on (IG)	11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE ROOM RELAY BLOCK - BATTERY)

REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE ROOM RELAY BLOCK - COOLER COMPRESSOR)

Tester Connection	Condition	Specified Condition
A/C IG fuse	Always	Below 1 Ω

Tester Connection	Condition	Specified Condition
3 - 5	Voltage not applied to terminals 1 and 2	10 kΩ or higher
3 - 5	Voltage applied to terminals 1 and 2	Below 1 Ω