TC and CG Terminal Circuit

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:

• 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.
• A DTC output mode signal is transmitted through the CAN communication system to each ECU including the center airbag sensor assembly. Thus when all systems do not enter DTC output mode, there may be an ECM malfunction.

1. CHECK WIRE HARNESS (TC OF DLC3 - TC OF ECM)

(a) Turn the ignition switch off.

(b) Disconnect the connector from the ECM.

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

Standard Resistance:

for 2GR-FE

for 1AR-FE

NG

REPLACE WIRE HARNESS

OK

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

(a) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Condition Specified Condition D1-4 (CG) - Body ground Always Below 1 Ω Text in Illustration *1 Front view of wire harness connector (to DLC3)

NG

REPLACE WIRE HARNESS

OK

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

(a) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Condition Specified Condition D1-13 (TC) - Body ground Always 1 MΩ or higher Text in Illustration *1 Front view of wire harness connector (to DLC3)

OK

REPLACE CENTER AIRBAG SENSOR ASSEMBLY

NG

REPLACE WIRE HARNESS OR EACH ECU