Last Modified: 05-13-2024 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 Single Knob 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)

  • DCM (telematics transceiver)
  • Radio and display receiver assembly
  • Harness or connector

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 Single Knob Type): PRECAUTION

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

USE SIMULATION METHOD TO CHECK

NG

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

OK

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

OK

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 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; AUDIO / VIDEO: RADIO RECEIVER: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; AUDIO / VIDEO: RADIO RECEIVER: REMOVAL

OK

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.

*a

Front view of telephone ECU wire connector

(to Radio and Display Receiver Assembly)

*b

Front view of telephone ECU wire connector

(to DCM (Telematics Transceiver))

(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

OK

6.

REPLACE DCM (TELEMATICS TRANSCEIVER)

Pre-procedure1

(a) Replace the DCM (telematics transceiver) with a new one.

HINT:

Click here 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; CELLULAR COMMUNICATION: DCM(TELEMATICS TRANSCEIVER): REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; CELLULAR COMMUNICATION: DCM(TELEMATICS TRANSCEIVER): REMOVAL

(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 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; AUDIO / VIDEO: RADIO RECEIVER: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; AUDIO / VIDEO: RADIO RECEIVER: REMOVAL