| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM1000000026POY |
| Model Year Start: 2023 | Model: Corolla | Prod Date Range: [09/2022 - ] |
| Title: CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM (for HV Model): B15C511,B15C513; Emergency Call Switch Circuit Short to Ground; 2023 - 2025 MY Corolla Corolla HV [09/2022 - ] | ||
|
DTC |
B15C511 |
Emergency Call Switch Circuit Short to Ground |
|
DTC |
B15C513 |
Emergency Call Switch Circuit Open |
DESCRIPTION
If the DCM (telematics transceiver) detects an error in the communication between the DCM (telematics transceiver) and the map light assembly (manual (SOS) switch) as a result of the DCM (telematics transceiver) self check, this DTC will be stored.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
B15C511 |
Emergency Call Switch Circuit Short to Ground |
Manual (SOS) switch impedance (Ω) is lower than the malfunction threshold for 10 seconds or more when the power switch is on (IG) |
|
|
B15C513 |
Emergency Call Switch Circuit Open |
Manual (SOS) switch impedance (Ω) is higher than the malfunction threshold for 10 seconds or more when the power switch is on (IG) |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Safety Connect System.
Click here
![2023 - 2025 MY Corolla Corolla HV [09/2022 - ]; CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM (for HV Model): PRECAUTION](/t3Portal/stylegraphics/info.gif)
PROCEDURE
|
1. |
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 |
|
|
|
2. |
INSPECT MAP LIGHT ASSEMBLY (MANUAL (SOS) SWITCH) |
|
(a) Remove the map light assembly (manual (SOS) switch). Click here
|
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
5 (SIG1) - 8 (GND3) |
Manual (SOS) switch not operated |
410 to 414 Ω |
|
5 (SIG1) - 8 (GND3) |
Manual (SOS) switch operated |
81 to 83 Ω |
| NG |
|
REPLACE MAP LIGHT ASSEMBLY (MANUAL (SOS) SWITCH)
|
|
|
3. |
CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - MAP LIGHT ASSEMBLY (MANUAL (SOS) SWITCH)) |
(a) Disconnect the I143 DCM (telematics transceiver) connector.
(b) Disconnect the T6 map light assembly (manual (SOS) switch) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I143-21 (SIG1) - T6-5 (SIG1) |
Always |
Below 1 Ω |
|
I143-3 (SIG-) - T6-8 (GND3) |
Always |
Below 1 Ω |
|
I143-21 (SIG1) or T6-5 (SIG1) - Body ground |
Always |
10 kΩ or higher |
|
I143-3 (SIG-) or T6-8 (GND3) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
REPLACE DCM (TELEMATICS TRANSCEIVER) |
(a) Replace the DCM (telematics transceiver) with a new one.
Click here
NOTICE:
- The power switch must be off.
- Do not exchange the DCM (telematics transceiver) with one from another vehicle.
| NEXT |
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