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 the communication between the DCM (telematics transceiver) and the center 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 FOR DTC (AIRBAG SYSTEM)

(a) Turn the engine switch off.

(b) Connect the Techstream to the DLC3.

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

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

Result





B -- GO TO AIRBAG SYSTEM How To Proceed With Troubleshooting
A -- Continue to next step.

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

(a) Remove the DCM (telematics transceiver) with the connector connected Removal.





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

Standard Voltage:





Waveform





Text in Illustration





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 center airbag sensor assembly with the connector connected Removal.





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

Standard Voltage:





Waveform





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

4. CHECK HARNESS AND CONNECTOR (FOR SHORT CIRCUIT)

(a) Disconnect the L111 DCM (telematics transceiver) connector.





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

Standard Resistance:





Text in Illustration





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

5. REPLACE DCM (TELEMATICS TRANSCEIVER)

(a) Replace the DCM (telematics transceiver) Removal.

NOTICE:
* The engine switch must be off.
* Do not replace the DCM (telematics transceiver) with one from another vehicle.

NEXT -- PERFORM DCM ACTIVATION DCM Activation

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

(a) Disconnect the L111 DCM (telematics transceiver) connector.





(b) Disconnect the L73 center airbag sensor connector.

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

Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal