| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM100000001N4Q6 |
| Model Year Start: 2021 | Model: Corolla | Prod Date Range: [04/2020 - 09/2022] |
| Title: CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM (for HV Model): B15C464; Airbag Signal Signal Plausibility Failure; 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022] | ||
|
DTC |
B15C464 |
Airbag Signal Signal Plausibility Failure |
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 stored.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
B15C464 |
Airbag Signal Signal Plausibility Failure |
DCM (telematics transceiver) detects an error in signals from airbag sensor assembly when power switch is on (IG). |
|
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
![2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM (for HV Model): PRECAUTION](/t3Portal/stylegraphics/info.gif)
-
After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.
Click here
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 or more.
(d) Turn the Techstream on.
(e) Clear the DTCs.
Body Electrical > SRS Airbag > Clear DTCs
(f) Check for DTCs and check that no DTCs are output.
Body Electrical > SRS Airbag > Trouble Codes
OK:
No DTCs are output.
| NG |
|
GO TO AIRBAG SYSTEM
|
|
|
2. |
CHECK DTC |
(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 or more.
(d) Turn the Techstream on.
(e) Clear the DTCs.
Body Electrical > Telematics > Clear DTCs
(f) Check for DTCs and check that no DTCs are output.
Body Electrical > Telematics > Trouble Codes
OK:
No DTCs are output.
| OK |
|
|
|
3. |
CHECK DCM (TELEMATICS TRANSCEIVER) (GSW SIGNAL) |
|
(a) Remove the DCM (telematics transceiver) but do not disconnect the connectors. Click here
|
|
(b) Check the input waveform.
(1) Check the signal waveform according to the condition(s) in the table below. (Check the waveform from the back of the wire harness connector of the DCM (telematics transceiver) while the airbag sensor assembly connectors are connected.)
Reference Waveform:
|
Item |
Condition |
|---|---|
|
Tester connection |
I143-13 (GSW) - Body ground |
|
Tool setting |
5.0 V/DIV., 20 ms/DIV. |
|
Vehicle condition |
Power switch on (IG) |
OK:
The waveform is similar to that shown in the illustration.
| NG |
|
|
|
4. |
REPLACE DCM (TELEMATICS TRANSCEIVER) |
(a) Replace the DCM (telematics transceiver).
Click here
NOTICE:
- The power switch must be off.
- Do not exchange the DCM (telematics transceiver) with one from another vehicle.
| NEXT |
|
|
5. |
CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - AIRBAG SENSOR ASSEMBLY) |
(a) Disconnect the I143 DCM (telematics transceiver) connector.
(b) Disconnect the I47 airbag sensor assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I143-13 (GSW) - I47-23 (GSW3) |
Always |
Below 1 Ω |
|
I143-13 (GSW) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|