Component Tests and General Diagnostics

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: Diagnosis Circuit
- Diagnosis Circuit

DESCRIPTION

DTC output mode is entered 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 CAN 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 CAN COMMUNICATION SYSTEM

(a) Check if the CAN communication system DTC is output Diagnosis System.

Result:





B -- REPAIR CIRCUITS INDICATED BY OUTPUT DTCS
A -- Continue to next step.

2. CHECK WIRE HARNESS (DLC3 - ECM)

(a) Turn the engine switch off.





(b) Disconnect the connector from ECM.

(c) 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 (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.

4. 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