DESCRIPTION If the DCM
(Telematics Transceiver) detects an error in communication between the
DCM (Telematics Transceiver) and the airbag ECU assembly as a result of
the DCM (Telematics Transceiver) self check, this DTC will be set. |
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area | |
B15C4 | Airbag Signal Malfunction/Not Input |
DCM (Telematics Transceiver) detects an error in signals from airbag ECU assembly when engine switch is on (IG). |
- Airbag system
- Wire harness or connector
- Airbag ECU assembly
- DCM (Telematics Transceiver)
| WIRING DIAGRAM
 CAUTION / NOTICE / HINT
NOTICE: The
vehicle is equipped with an SRS (Supplemental Restraint System) which
includes components such as airbags. Before servicing (including removal
or installation of parts), be sure to read the Precaution in the SRS. Click here
 PROCEDURE
| 1. |
CHECK 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) Turn the Techstream on. (e) Clear the DTCs. Body Electrical > SRS Airbag > Clear DTCs
(f) Recheck for DTCs. Body Electrical > SRS Airbag > Trouble Codes
|
Result | Proceed to | |
DTCs are not output | A | |
DTCs are output | B |
| B |
 | GO TO AIRBAG SYSTEM |
|
A |
 | |
| 2. |
INSPECT DCM (TELEMATICS TRANSCEIVER) (GSW SIGNAL) |
| (a) Remove the DCM (Telematics Transceiver) but do not disconnect the connectors.
Click here |
 |
|
*a | Component with harness connected
(DCM (Telematics Transceiver)) | | |
(b) Measure the voltage according to the value(s) in the table below. Standard Voltage: |
Tester Connection | Condition |
Specified Condition | |
G9-24 (GSW) - Body ground |
Engine switch on (IG) |
6.5 to 8.5 V | Reference Waveform: |
Item | Condition | |
Tester connection | G9-24 (GSW) - Body ground | |
Tool setting | 5.0 V/DIV., 20 ms/DIV. | |
Vehicle condition | Engine switch on (IG) |
|
Result | Proceed to | |
8.5 V or higher | A | |
Below 6.5 V | B | |
6.5 to 8.5 V | C |
| B |
| GO TO STEP 4 |
| C |
| GO TO STEP 5 |
|
A | |
| |
| 3. |
CHECK HARNESS AND CONNECTOR (FOR OPEN CIRCUIT) |
(a) Remove the airbag ECU assembly but do not disconnect the connectors.
Click here
| (b) Measure the voltage according to the value(s) in the table below.
Standard Voltage: |
Tester Connection | Condition |
Specified Condition | |
G50-23 (GSW3) - Body ground |
Engine switch on (IG) |
8.5 V or higher | Reference Waveform: |
Item | Condition | |
Tester connection |
G50-23 (GSW3) - Body ground | |
Tool setting | 5.0 V/DIV., 20 ms/DIV. | |
Vehicle condition |
Engine switch on (IG) | |
 |
|
*a | Component with harness connected
(Airbag ECU Assembly) | | |
| OK |
| REPLACE AIRBAG ECU ASSEMBLY |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
| 4. |
CHECK HARNESS AND CONNECTOR (FOR SHORT CIRCUIT) |
(a) Disconnect the G9 DCM (Telematics Transceiver) connector. (b) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
G9-24 (GSW) - Body ground |
Always | 10 kΩ or higher | |
G50-23 (GSW3) - Body ground |
Always | 10 kΩ or higher |
| NG |
| GO TO STEP 6 |
|
OK | |
| |
| 5. |
REPLACE DCM (TELEMATICS TRANSCEIVER) | (a) Replace the DCM (Telematics Transceiver).
Click here
NOTICE:
- The engine switch must be off.
- Do not swap the DCM (Telematics Transceiver) with one from another vehicle.
| NEXT |
| PERFORM DCM ACTIVATION |
| 6. |
CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - AIRBAG ECU ASSEMBLY) |
(a) Disconnect the G9 DCM (Telematics Transceiver) connector. (b) Disconnect the G50 airbag ECU assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
G9-24 (GSW) - G50-23 (GSW3) |
Always | Below 1 Ω | |
G9-24 (GSW) or G50-23 (GSW3) - Body ground |
Always | 10 kΩ or higher |
| OK |
| REPLACE AIRBAG ECU ASSEMBLY |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR | | 
