| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM10000000262L6 |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [09/2022 - ] |
| Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for 8 Inch Display Type (w/ Single Knob Type) or 10.5 Inch Display Type): B15DB87; Telematics Transceiver Missing Message; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - ] | ||
|
DTC |
B15DB87 |
Telematics Transceiver Missing Message |
DESCRIPTION
When the radio and display receiver assembly cannot detect the DCM (telematics transceiver), this DTC will be stored.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
DTC Output from |
Priority |
|---|---|---|---|---|---|
|
B15DB87 |
Telematics Transceiver Missing Message |
When 90 seconds has elapsed after turning the ignition switch to ON and the DCM (telematics transceiver) cannot be detected, the DCM (telematics transceiver) is judged to be disconnected after comparison with the past USB connected devices information. (2 trip detection logic) |
|
Navigation System |
A |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following procedure.
- When replacing the DCM (telematics transceiver), make sure to replace it with a new one.
-
Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Audio and Visual System.
Click here
![2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - ]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for 8 Inch Display Type (w/ Single Knob Type) or 10.5 Inch Display Type): PRECAUTION](/t3Portal/stylegraphics/info.gif)
HINT:
- The Telematics System performs communication between devices via USB communication. If a malfunction such as a short in a communication line, short to +B or short to ground occurs in the USB circuit, communication will stop and the Telematics System will not operate correctly.
- This DTC may be stored due to environmental reasons such as electrical noise or interference.
PROCEDURE
|
1. |
CHECK DTC |
Pre-procedure1
(a) Clear the DTCs.
Body Electrical > Navigation System > Clear DTCs
Procedure1
(b) Check for DTCs.
Body Electrical > Navigation System > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
OK |
|
DTCs are output |
NG |
Post-procedure1
(c) None
| OK |
|
|
|
2. |
CHECK HARNESS AND CONNECTOR (DCM [TELEMATICS TRANSCEIVER] POWER SOURCE) |
Pre-procedure1
(a) Disconnect the I143 DCM (telematics transceiver) connector.
Procedure1
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I143-20 (E) - Body ground |
Always |
Below 1 Ω |
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I143-1 (+B) - I143-20 (E) |
Ignition switch off |
11 to 14 V |
|
I143-19 (IG2) - I143-20 (E) |
Ignition switch ON |
11 to 14 V |
Post-procedure1
(d) None
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - DCM [TELEMATICS TRANSCEIVER]) |
Pre-procedure1
(a) Disconnect the I175 radio and display receiver assembly connector.
(b) Disconnect the I143 DCM (telematics transceiver) connector.
Procedure1
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I175-18 (USBV) - I143-15 (USBV) |
Always |
Below 1 Ω |
|
I175-17 (USBG) - I143-31 (USBG) |
Always |
Below 1 Ω |
|
I175-18 (USBV) - Body ground |
Always |
10 kΩ or higher |
|
I175-17 (USBG) - Body ground |
Always |
10 kΩ or higher |
Post-procedure1
(d) None
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY (USBV, USBG) |
Pre-procedure1
(a) With the radio and display receiver assembly connectors connected, disconnect the I36 DCM (telematics transceiver) connector.
Procedure1
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I143-31 (USBG) - Body ground |
Always |
Below 1 Ω |
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
I143-15 (USBV) - I143-31 (USBG) |
Ignition switch ON |
3 V or higher |
Post-procedure1
(d) None
| NG |
|
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY
|
|
|
5. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - DCM [TELEMATICS TRANSCEIVER]) |
Pre-procedure1
|
(a) Disconnect the t8 radio and display receiver assembly connector. |
|
(b) Disconnect the t7 DCM (telematics transceiver) connector.
Procedure1
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
t8-1 (USB+) - t7-2 (USB+) |
Always |
Below 1 Ω |
|
t8-2 (USB-) - t7-1 (USB-) |
Always |
Below 1 Ω |
|
t8-3 (USBS) - t7-3 (USBS) |
Always |
Below 1 Ω |
|
t8-1 (USB+) - Body ground |
Always |
10 kΩ or higher |
|
t8-2 (USB-) - Body ground |
Always |
10 kΩ or higher |
|
t8-3 (USBS) - Body ground |
Always |
10 kΩ or higher |
Post-procedure1
(d) None
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
6. |
REPLACE DCM (TELEMATICS TRANSCEIVER) |
Pre-procedure1
(a) Replace the DCM (telematics transceiver) with a new one.
HINT:
Click here
(b) Clear the DTCs.
Body Electrical > Navigation System > Clear DTCs
Procedure1
(c) Check for DTCs.
Body Electrical > Navigation System > Trouble Codes
Post-procedure1
(d) None
| OK |
|
END (DCM [TELEMATICS TRANSCEIVER] IS DEFECTIVE) |
| NG |
|
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY
|
|
|