AIRBAG SYSTEM > TC and CG Terminal Circuit

for Preparation Click here


DESCRIPTION

DTC output mode is set by connecting terminals TC and CG of the DLC3.
DTCs are displayed by blinking of the SRS warning light.

HINT:
  1. When multiple warning lights in the combination meter blink continuously, a ground short in the wiring or an ECU connected to terminal TC of the DLC3 is suspected.
  2. A DTC output mode signal is transmitted through the CAN communication system to each ECU including the airbag sensor assembly. Thus when multiple systems do not enter DTC output mode, there may be a power management control ECU malfunction.


WIRING DIAGRAM


C165791E07


INSPECTION PROCEDURE

1.CHECK WIRE HARNESS (TC OF DLC3 - TC OF POWER MANAGEMENT CONTROL ECU)


    C234357E01

  1. Turn the power switch off.

  1. Disconnect the connector from the power management control ECU.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    H44-13 (TC) - H3-11 (TC)
    		Always
    		Below 1 Ω

    Text in Illustration 
    *1
    		DLC3
    *a
    		Front view of wire harness connector
    (to Power Management Control ECU)



NG
REPAIR OR REPLACE WIRE HARNESS
OK


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


    C204945E15

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    H44-4 (CG) - Body ground
    		Always
    		Below 1 Ω

    Text in Illustration 
    *1
    		DLC3



NG
REPAIR OR REPLACE WIRE HARNESS
OK


3.CHECK WIRE HARNESS (TC OF DLC3 - BODY GROUND)


    C204945E17

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    H44-13 (TC) - Body ground
    		Always
    		1 MΩ or higher

    Text in Illustration 
    *1
    		DLC3



NG
REPAIR OR REPLACE WIRE HARNESS OR REPLACE EACH ECU
OK

REPLACE AIRBAG SENSOR ASSEMBLY (Click here)