B15C4

CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM: B15C4: Airbag Signal Malfunction/Not Input
B15C4 - Airbag Signal Malfunction/Not Input

DESCRIPTION

If the DCM (Telematics Transceiver) detects an error in communication between the DCM (Telematics Transceiver) and the airbag sensor assembly as a result of the DCM (Telematics Transceiver) self check, this DTC will be set.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC (AIRBAG SYSTEM)

(a) Turn the power switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the power switch on (IG) and wait for 10 seconds.

(d) Turn the Techstream on.

(e) Check the DTC of "Airbag System" Reading and Clearing Diagnostic Trouble Codes.

Result:





B -- GO TO AIRBAG SYSTEM Airbag System
A -- Continue to next step.

2. INSPECT DCM (TELEMATICS TRANSCEIVER) (GSW SIGNAL)

(a) Remove the DCM (Telematics Transceiver) but do not disconnect the connectors Removal.





(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





Text in Illustration





Reference Waveform





Result:





B -- CHECK HARNESS AND CONNECTOR (FOR SHORT CIRCUIT)

C -- REPLACE DCM (TELEMATICS TRANSCEIVER)
A -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (FOR OPEN CIRCUIT)

(a) Remove the airbag sensor assembly but do not disconnect the connectors Removal.





(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





Text in Illustration





Reference Waveform





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE AIRBAG SENSOR ASSEMBLY Removal

4. CHECK HARNESS AND CONNECTOR (FOR SHORT CIRCUIT)

(a) Disconnect the H67 DCM (Telematics Transceiver) connector.

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

Standard Resistance:





NG -- CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - AIRBAG SENSOR ASSEMBLY)
OK -- Continue to next step.

5. REPLACE DCM (TELEMATICS TRANSCEIVER)

(a) Replace the DCM (Telematics Transceiver) Removal.

NOTICE:
* The power switch must be off.
* Do not swap the DCM (Telematics Transceiver) with one from another vehicle.

NEXT -- PERFORM DCM ACTIVATION DCM Activation

6. CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - AIRBAG SENSOR ASSEMBLY)

(a) Disconnect the H67 DCM (Telematics Transceiver) connector.

(b) Disconnect the H84 airbag sensor connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE AIRBAG SENSOR ASSEMBLY Removal