Airbag System Diagnosis Circuit

Vehicle Interior. Land Cruiser. Urj200, 202 Grj200 Vdj200
Supplemental Restraint Systems. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CAN COMMUNICATION SYSTEM

CHECK HARNESS AND CONNECTOR (DLC3 - ECM)

CHECK HARNESS AND CONNECTOR (DLC3 - BODY GROUND)

CHECK HARNESS AND CONNECTOR (TC OF ECM - BODY GROUND)

AIRBAG SYSTEM - Diagnosis Circuit


DESCRIPTION

DTC output mode is set by connecting terminals TC and CG of the DLC3.
DTCs are output by the blinking of the SRS warning light.
HINT:
  1. When each warning light stays blinking, a ground short in the wiring of terminal TC of the DLC3 or an internal ground short in each ECU is suspected.
  2. A DTC output mode signal is transmitted through the CAN communication system to each ECU including the center airbag sensor. Thus, when all systems do not enter DTC output mode, there may be an ECM malfunction.

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Supplemental Restraint Systems.Airbag System.Airbag System Diagnosis Circuit


Land Cruiser. Urj200, 202 Grj200 Vdj200.Supplemental Restraint Systems.Airbag System.Airbag System Diagnosis Circuit


INSPECTION PROCEDURE

NOTICE:
  1. After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work (Click here).
  2. When disconnecting the cable, some systems need to be initialized after the cable is reconnected (Click here).
1.CHECK CAN COMMUNICATION SYSTEM

  1. Check if a CAN communication system DTC is output.

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


B
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS (Click here)

C
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS (Click here)
A


2.CHECK HARNESS AND CONNECTOR (DLC3 - ECM)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Supplemental Restraint Systems.Airbag System.Airbag System Diagnosis Circuit

  1. Turn the ignition switch off.

  1. Disconnect the A38 connector from the ECM.

  1. for LHD:

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

      Standard Resistance:
      for 1GR-FE, 1UR-FE, 3UR-FE:
      Tester Connection
      		Condition
      		Specified Condition
      E22-13 (TC) - A38-16 (TC)
      		Always
      		 Below 1 Ω
      for 1VD-FTV:
      Tester Connection
      		Condition
      		Specified Condition
      E22-13 (TC) - A38-27 (TC)
      		Always
      		 Below 1 Ω

  1. for RHD:

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

      Standard Resistance:
      for 1GR-FE, 1UR-FE, 3UR-FE:
      Tester Connection
      		Condition
      		Specified Condition
      E22-13 (TC) - A52-16 (TC)
      		Always
      		 Below 1 Ω
      for 1VD-FTV:
      Tester Connection
      		Condition
      		Specified Condition
      E22-13 (TC) - A52-27 (TC)
      		Always
      		 Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK HARNESS AND CONNECTOR (DLC3 - BODY GROUND)
Land Cruiser. Urj200, 202 Grj200 Vdj200.Supplemental Restraint Systems.Airbag System.Airbag System Diagnosis Circuit

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E22-4 (CG) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK HARNESS AND CONNECTOR (TC OF ECM - BODY GROUND)
Land Cruiser. Urj200, 202 Grj200 Vdj200.Supplemental Restraint Systems.Airbag System.Airbag System Diagnosis Circuit

  1. for LHD:

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

      Standard Resistance:
      for 1GR-FE, 1UR-FE, 3UR-FE:
      Tester Connection
      		Condition
      		Specified Condition
      A38-16 (TC) - Body ground
      		Always
      		1 MΩ or higher
      for 1VD-FTV:
      Tester Connection
      		Condition
      		Specified Condition
      A38-27 (TC) - Body ground
      		Always
      		1 MΩ or higher

  1. for RHD:

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

      Standard Resistance:
      for 2UZ-FE, 3UR-FE:
      Tester Connection
      		Condition
      		Specified Condition
      A52-16 (TC) - Body ground
      		Always
      		1 MΩ or higher
      for 1GR-FE, 1VD-FTV:
      Tester Connection
      		Condition
      		Specified Condition
      A52-27 (TC) - Body ground
      		Always
      		1 MΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR OR EACH ECU
OK

REPLACE CENTER AIRBAG SENSOR ASSEMBLY (Click here)