AIRBAG SYSTEM > TC and CG Terminal Circuit

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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 (Click here).
  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 if no systems enter DTC output mode, the ECM may have a malfunction.


WIRING DIAGRAM


C196987E03


INSPECTION PROCEDURE

1.CHECK HARNESS AND CONNECTOR (DLC3 - ECM)
C196988E04

  1. Turn the ignition switch off.

  1. Disconnect the connector from the ECM.

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

    Standard Resistance:
    for 1KR-FE and 1NR-FE 
    Tester Connection
    		Condition
    		Specified Condition
    D47-13 (TC) -
    A18-40 (TC)
    		Always
    		Below 1 Ω
    for 1ND-TV 
    Tester Connection
    		Condition
    		Specified Condition
    D47-13 (TC) -
    A19-24 (TC)
    		Always
    		Below 1 Ω

    Text in Illustration 
    *A
    		for 1KR-FE and 1NR-FE
    *B
    		for 1ND-TV
    *1
    		Front view of DLC3
    *2
    		Front view of wire harness connector
    (to ECM)



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


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


    C196989E01

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D47-4 (CG) -
    Body ground
    		Always
    		Below 1 Ω

    Text in Illustration 
    *1
    		Front view of DLC3



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK HARNESS AND CONNECTOR (TC OF ECM)


    C196990E03

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

    Standard Resistance:
    for 1KR-FE and 1NR-FE 
    Tester Connection
    		Condition
    		Specified Condition
    A18-40 (TC) -
    Body ground
    		Always
    		1 MΩ or higher
    for 1ND-TV 
    Tester Connection
    		Condition
    		Specified Condition
    A19-24 (TC) -
    Body ground
    		Always
    		1 MΩ or higher

    Text in Illustration 
    *A
    		for 1KR-FE and 1NR-FE
    *B
    		for 1ND-TV
    *1
    		Front view of wire harness connector
    (to ECM)



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.REPLACE ECM

  1. Replace the ECM.

  1. Check for DTCs of the ECM.

    1. for 1KR-FE (Click here)
    2. for 1NR-FE (Click here)
    3. for 1ND-TV (Click here)
    Result 
    Result
    		Proceed to
    Normal system code is output.
    		A
    DTC is output (for 1KR-FE).
    		B
    DTC is output (for 1NR-FE).
    		C
    DTC is output (for 1ND-TV).
    		D
    DTC output mode is set (except center airbag sensor assembly).
    		E



B
GO TO INSPECTION PROCEDURE OF DTC OUTPUT (Click here)

C
GO TO INSPECTION PROCEDURE OF DTC OUTPUT (Click here)

D
GO TO INSPECTION PROCEDURE OF DTC OUTPUT (Click here)

E
REPLACE CENTER AIRBAG SENSOR ASSEMBLY (Click here)
A

END