Component Tests and General Diagnostics

SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: TC and CG Terminal Circuit
- TC and CG Terminal Circuit

DESCRIPTION

DTC output mode is set by connecting terminals TC and CG of the DLC3.

DTCs are indicated by blinking pattern of the SRS warning light.

HINT
* When the SRS warning light remains blinking, a ground short in the wiring of terminal TC of the DLC3 or an internal ground short in the center airbag sensor assembly 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.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

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 2ZR-FE
for 2AZ-FE










NG -- REPAIR OR REPLACE WIRE HARNESS
OK -- Continue to next step.

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

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





Standard Resistance:





NG -- REPAIR OR REPLACE WIRE HARNESS
OK -- Continue to next step.

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

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





Standard Resistance:





NG -- REPAIR OR REPLACE WIRE HARNESS OR EACH ECU

OK -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal