- Airbag system
- Wire harness or connector
- Center airbag sensor assembly
- DCM (Telematics Transceiver)
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VJC1 |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - ] |
| Title: CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM: B15C4; Airbag Signal Malfunction/Not Input; 2016 - 2020 MY Sienna [12/2015 - ] | ||
|
DTC |
B15C4 |
Airbag Signal Malfunction/Not Input |
DESCRIPTION
If the DCM (Telematics Transceiver) detects an error in 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.
|
DTC No. |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
B15C4 |
DCM (Telematics Transceiver) detects an error in signals from center airbag sensor assembly when ignition switch is ON. |
|
WIRING DIAGRAM
PROCEDURE
|
1. |
CHECK 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) Turn the Techstream on.
(e) Check the DTC of "AIRBAG SYSTEM" (See page
![2016 - 2020 MY Sienna [12/2015 - ]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: DTC CHECK / CLEAR](/t3Portal/stylegraphics/info.gif)
).
Result
|
Result |
Proceed to |
|---|---|
|
DTC is not output |
A |
|
DTC is output |
B |
| B |
|
|
|
2. |
INSPECT DCM (TELEMATICS TRANSCEIVER) (GSW SIGNAL) |
|
(a) Remove the DCM (Telematics Transceiver) but do not disconnect the connectors (See page
|
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D73-24 (GSW) - Body ground |
Ignition switch ON |
6.5 to 8.5 V |
Text in Illustration
|
*1 |
Component with harness connected (DCM (Telematics Transceiver)) |
|
*a |
Waveform |
Reference Waveform
|
Item |
Condition |
|---|---|
|
Tester connection |
D73-24 (GSW) - Body ground |
|
Tool setting |
5.0 V/DIV., 20 ms/DIV. |
|
Vehicle condition |
Ignition switch ON |
Result
|
Result |
Proceed to |
|---|---|
|
8.5 V or higher |
A |
|
Below 6.5 V |
B |
|
6.5 V to 8.5 V |
C |
| B |
|
| C |
|
|
|
3. |
CHECK HARNESS AND CONNECTOR (FOR OPEN CIRCUIT) |
|
(a) Remove the center airbag sensor assembly but do not disconnect the connectors (See page
|
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D150-24 (GSW3) - Body ground |
Ignition switch ON |
8.5 V or higher |
Text in Illustration
|
*1 |
Component with harness connected (Center Airbag Sensor Assembly) |
|
*a |
Waveform |
Reference Waveform
|
Item |
Condition |
|---|---|
|
Tester connection |
D150-24 (GSW3) - Body ground |
|
Tool setting |
5.0 V/DIV., 20 ms/DIV. |
|
Vehicle condition |
Ignition switch ON |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
4. |
CHECK HARNESS AND CONNECTOR (FOR SHORT CIRCUIT) |
|
(a) Disconnect the D73 DCM (Telematics Transceiver) connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D73-24 (GSW) - Body ground |
Always |
10 kΩ or higher |
Text in Illustration
|
*1 |
Front view of wire harness connector (DCM (Telematics Transceiver)) |
| NG |
|
|
|
5. |
REPLACE DCM (TELEMATICS TRANSCEIVER) |
(a) Replace the DCM (Telematics Transceiver) (See page
).
NOTICE:
- The ignition switch must be off.
- Do not swap the DCM (Telematics Transceiver) with one from another vehicle.
| NEXT |
|
PERFORM DCM ACTIVATION (See page
|
|
6. |
CHECK HARNESS AND CONNECTOR (DCM - CENTER AIRBAG SENSOR ASSEMBLY) |
|
(a) Disconnect the D73 DCM (Telematics Transceiver) connector. |
|
(b) Disconnect the D150 center airbag sensor assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D73-24 (GSW) - D150-24 (GSW3) |
Always |
Below 1 Ω |
|
D73-24 (GSW) - Body ground |
Always |
10 kΩ or higher |
Text in Illustration
|
*1 |
Front view of wire harness connector (to DCM (Telematics Transceiver)) |
|
*2 |
Front view of wire harness connector (to Center Airbag Sensor Assembly) |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|