Dtc B1422/22 Compressor Lock Sensor Circuit

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

SYSTEM DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CAN COMMUNICATION SYSTEM

INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY

INSPECT COOLER COMPRESSOR ASSEMBLY (A/C LOCK SENSOR)

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - A/C LOCK SENSOR)

DTC B1422/22 Compressor Lock Sensor Circuit


SYSTEM DESCRIPTION

The ECM sends the engine speed signal to the air conditioning amplifier assembly via CAN communication.
The air conditioning amplifier assembly reads the difference between compressor speed and engine speed. When the difference becomes too large, the air conditioning amplifier assembly determines that the compressor is locked, and turns the magnetic clutch off.

DTC Code
DTC Detection Condition
Trouble Area
B1422/22
An open or short in the compressor lock sensor circuit.
  1. Cooler compressor assembly (A/C lock sensor)
  2. Compressor drive belt
  3. Harness or connector between cooler compressor assembly and air conditioning amplifier assembly
  4. Air conditioning amplifier assembly
  5. CAN communication line

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1422/22 Compressor Lock Sensor Circuit


Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1422/22 Compressor Lock Sensor Circuit


INSPECTION PROCEDURE

1.CHECK CAN COMMUNICATION SYSTEM

  1. Use the intelligent tester to check if the CAN communication system is functioning normally.

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


B
GO TO CAN COMMUNICATION SYSTEM (Click here)

C
GO TO CAN COMMUNICATION SYSTEM (Click here)
A


2.INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1422/22 Compressor Lock Sensor Circuit

  1. w/ Rear Heater

    1. Remove the air conditioning amplifier assembly with its connectors still connected (Click here).



      2. Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1422/22 Compressor Lock Sensor Circuit

    2. Measure the waveform of the connector.

      Measurement Condition
      Item
      		Contents
      Terminal No. (Symbol)
      		E35-28 (LOCK) - E35-29 (SG-5)
      Tool Setting
      		200 mV/DIV., 10 ms/DIV.
      Condition
      		Engine running
      A/C switch on
      Blower switch LO


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1422/22 Compressor Lock Sensor Circuit

  1. w/o Rear Heater

    1. Remove the air conditioning amplifier assembly with its connectors still connected (Click here).



      2. Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1422/22 Compressor Lock Sensor Circuit

    2. Measure the waveform of the connector.

      Measurement Condition
      Item
      		Contents
      Terminal No. (Symbol)
      		E81-8 (LOCK) - E81-35 (SG-5)
      Tool Setting
      		200 mV/DIV., 10 ms/DIV.
      Condition
      		Engine running
      A/C switch on
      Blower switch LO


NG
Go to step 3
OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)

3.INSPECT COOLER COMPRESSOR ASSEMBLY (A/C LOCK SENSOR)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1422/22 Compressor Lock Sensor Circuit

  1. Disconnect the C30 connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    C30-1 (SSR+) - C30-2 (SSR-)
    		20°C (68°F)
    		65 to 125 Ω


NG
REPLACE COOLER COMPRESSOR ASSEMBLY (A/C LOCK SENSOR)
OK


4.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - A/C LOCK SENSOR)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1422/22 Compressor Lock Sensor Circuit

  1. w/ Rear Heater

    1. Disconnect the E35 amplifier connector.

    2. Disconnect the C30 compressor connector.

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

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      E35-28 (LOCK) - C30-1 (SSR+)
      		Always
      		Below 1 Ω
      E35-29 (SG-5) - C30-2 (SSR-)
      		Always
      		Below 1 Ω
      E35-28 (LOCK) - Body ground
      		Always
      		10 kΩ or higher
      E35-29 (SG-5) - Body ground
      		Always
      		10 kΩ or higher


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1422/22 Compressor Lock Sensor Circuit

  1. w/o Rear Heater

    1. Disconnect the E81 amplifier connector.

    2. Disconnect the C30 compressor connector.

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

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      E81-8 (LOCK) - C30-1 (SSR+)
      		Always
      		Below 1 Ω
      E81-35 (SG-5) - C30-2 (SSR-)
      		Always
      		Below 1 Ω
      E81-8 (LOCK) - Body ground
      		Always
      		10 kΩ or higher
      E81-35 (SG-5) - Body ground
      		Always
      		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)