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 center airbag sensor assembly as a result of the DCM (Telematics Transceiver) self check, this DTC will be set.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
components such as airbags. Before servicing (including removal or installation of parts), be sure to read the Precaution in the SRS Service Precautions
PROCEDURE
1. CHECK FOR DTC (AIRBAG SYSTEM)
(a) Turn the ignition switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON and wait for 10 seconds.
(d) Check the DTC of "AIRBAG SYSTEM" DTC Check / Clear.
Result
B -- GO TO AIRBAG SYSTEM Airbag System
A -- Continue to next step.
2. CHECK DCM (TELEMATICS TRANSCEIVER) (GSW SIGNAL)
(a) Remove the DCM (Telematics Transceiver) with the connectors connected Removal.
(b) Measure the voltage according to the value(s) in the table below.
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 connectors 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 F39 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 ignition 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 F39 DCM (Telematics Transceiver) connector.
(b) Disconnect the F33 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