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

INSPECT MAGNET CLUTCH ASSEMBLY

CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

INSPECT COOLER COMPRESSOR ASSEMBLY

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - COOLER COMPRESSOR ASSEMBLY)

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. CAN communication line
  2. Cooler compressor assembly
  3. Harness or connector
  4. Air conditioning amplifier assembly

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


INSPECTION PROCEDURE

NOTICE:
  1. ECM malfunctions can affect the storage of this DTC. Therefore, check all ECM DTCs and confirm that the system is normal before performing the following inspection.
    1. for 1GR-FE: Click here
    2. for 1VD-FTV (w/ DPF): Click here
    3. for 1VD-FTV (w/o DPF): Click here
  2. The air conditioning system uses the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting (Click here ).
1.INSPECT MAGNET CLUTCH ASSEMBLY

  1. Remove the magnet clutch assembly.

    1. for 1GR-FE: Click here
    2. for 1VD-FTV: Click here

  1. Inspect the magnet clutch assembly.

    1. for 1GR-FE: Click here
    2. for 1VD-FTV: Click here
    Result
    Result
    		Proceed to
    OK
    		A
    NG (for 1GR-FE)
    		B
    NG (for 1VD-FTV)
    		C


B
REPLACE MAGNET CLUTCH ASSEMBLY (Click here)

C
REPLACE MAGNET CLUTCH ASSEMBLY (Click here)
A


2.CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY


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


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


    Text in Illustration
    *a
    		Component with harness connected
    ((Air Conditioning Amplifier Assembly)
    		*b
    		Waveform

  1. Measure the waveform of the connector.

    Measurement Condition
    Item
    		Contents
    Terminal No. (Symbol)
    		E81-8 (LOCK) - E81-13 (SG-2)
    Tool Setting
    		200 mV/DIV., 10 ms/DIV.
    Condition
    1. Engine running
    2. A/C switch on
    3. Blower switch LO
    OK:
    Waveform varies with the blower level.


NG
Go to step 3
OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)

3.INSPECT COOLER COMPRESSOR ASSEMBLY

  1. Remove the cooler compressor assembly.

    1. for 1GR-FE: Click here
    2. for 1VD-FTV: Click here

  1. Inspect the cooler compressor assembly.

    1. for 1GR-FE: Click here
    2. for 1VD-FTV: Click here
    Result
    Result
    		Proceed to
    OK
    		A
    NG (for 1GR-FE)
    		B
    NG (for 1VD-FTV)
    		C


B
REPLACE COOLER COMPRESSOR ASSEMBLY (Click here)

C
REPLACE COOLER COMPRESSOR ASSEMBLY (Click here)
A


4.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - COOLER COMPRESSOR ASSEMBLY)

  1. Disconnect the E81 air conditioning amplifier assembly connector.

  1. Disconnect the C30 cooler compressor assembly connector.

  1. 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
    E81-13 (SG-2) - C30-2 (SSR-)
    		Always
    		Below 1 Ω
    C30-1 (SSR+) - C30-2 (SSR-)
    		Always
    		Below 1 Ω
    E81-8 (LOCK) or C30-1 (SSR+) - Body ground
    		Always
    		10 kΩ or higher
    E81-13 (SG-2) or C30-2 (SSR-) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)