Airbag System (For Sedan) Tc And Cg Terminal Circuit

Vehicle Interior. Yaris. Ncp93, 131
Supplemental Restraint Systems. Yaris. Ncp93, 131

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (DLC3 - ECM)

CHECK HARNESS AND CONNECTOR (CG OF DLC3 - BODY GROUND)

CHECK HARNESS AND CONNECTOR (TC OF ECM)

REPLACE ECM

AIRBAG SYSTEM (for Sedan) - TC and CG Terminal Circuit


DESCRIPTION

DTC output mode is set by connecting terminals TC and CG of the DLC3.
The DTCs are displayed by blinking the SRS warning light.
HINT:
  1. Make sure that DTCs which relate to the CAN communication system are not output. If any of these DTCs are output, check the CAN communication system (YARIS_NCP93 RM000001D3E00OX.html ).
  2. When a warning light keeps blinking, a short to ground in the wiring of terminal TC of the DLC3 or an internal ground short in an ECU is suspected.
  3. The DTC output mode signal is transmitted through the CAN to each ECU including the center airbag sensor assembly. Thus when no systems enter DTC output mode, the ECM may have a malfunction.

WIRING DIAGRAM


Yaris. Ncp93, 131.Supplemental Restraint Systems.Airbag System (For Sedan).Airbag System (For Sedan) Tc And Cg Terminal Circuit


INSPECTION PROCEDURE

1.CHECK HARNESS AND CONNECTOR (DLC3 - ECM)
Yaris. Ncp93, 131.Supplemental Restraint Systems.Airbag System (For Sedan).Airbag System (For Sedan) Tc And Cg Terminal Circuit

  1. Turn the ignition switch off.

  1. Disconnect the connector from the ECM.

  1. Measure the resistance.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D15-13 (TC) -
    A21-27 (TC)
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (TC OF DLC3 - TC OF ECM)
OK


2.CHECK HARNESS AND CONNECTOR (CG OF DLC3 - BODY GROUND)


    Yaris. Ncp93, 131.Supplemental Restraint Systems.Airbag System (For Sedan).Airbag System (For Sedan) Tc And Cg Terminal Circuit

  1. Measure the resistance.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D15-4 (CG) -
    Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (CG OF DLC3 - BODY GROUND)
OK


3.CHECK HARNESS AND CONNECTOR (TC OF ECM)


    Yaris. Ncp93, 131.Supplemental Restraint Systems.Airbag System (For Sedan).Airbag System (For Sedan) Tc And Cg Terminal Circuit

  1. Measure the resistance.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A21-27 (TC) -
    Body ground
    		Always
    		1 MΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.REPLACE ECM

  1. Replace the ECM.

  1. Check for DTCs of the ECM (YARIS_NCP93 RM000001CN002AX.html ).

    Result:
    Result
    		Proceed to
    Normal system code is output
    		A
    DTC is output
    		B
    DTC output mode is set (except center airbag sensor assembly)
    		C


A
END

B
GO TO INSPECTION PROCEDURE OF DTC OUTPUT
C

REPLACE CENTER AIRBAG SENSOR ASSEMBLY