Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM1000000018QYU
Model Year Start: 2018 Model: Sienna Prod Date Range: [11/2017 -           ]
Title: NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: B15DB; Telematics Transceiver Disconnected; 2018 - 2020 MY Sienna [11/2017 -        ]

DTC

B15DB

Telematics Transceiver Disconnected

DESCRIPTION

If the radio and display receiver assembly cannot detect the DCM (telematics transceiver) for a certain period of time (90 seconds) after the ignition switch is turned ON and the radio and display receiver assembly confirms that the information is missing by checking past DCM (telematics transceiver) recognition information (registered information), this DTC will be stored.

The telematics system uses USB communication between devices. If an open, short, short to +B or short to ground occurs in the USB circuit, communication is interrupted and the telematics system will not operate normally.

DTC Code

DTC Detection Condition

Trouble Area

B15DB

DCM (telematics transceiver) disconnected
  • Harness or connector
  • DCM (telematics transceiver)
  • DCM (telematics transceiver) power source circuit
  • Radio and display receiver assembly
  • Navigation ECU

HINT:

This DTC may be stored due to environmental reasons such as electrical noise or interference.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • When replacing the radio and display receiver assembly or navigation ECU, always replace it with a new one. If a radio and display receiver assembly or navigation ECU which was installed to another vehicle is used, the following may occur:
    • A communication malfunction DTC is stored.
    • The radio and display receiver assembly or navigation ECU may not operate normally.
  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • Before replacing the DCM (telematics transceiver), refer to Registration.

    Click here 2018 - 2020 MY Sienna [11/2017 -        ]; CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM: DCM ACTIVATION

PROCEDURE

1.

CHECK DTC

(a) Clear the DTCs.

(b) Turn the ignition switch off.

(c) Turn the ignition switch ON and wait for 90 seconds.

(d) Recheck for DTCs and check that no DTCs are output.

OK:

No DTCs are output.

OK

USE SIMULATION METHOD TO CHECK

NG

2.

CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) POWER SOURCE)

(a) Disconnect the DCM (telematics transceiver) connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

D73-4 (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

D73-1 (+B) - D73-4 (E)

Always

11 to 14 V

D73-8 (ACC) - D73-4 (E)

Ignition switch ACC

11 to 14 V

D73-7 (IG2) - D73-4 (E)

Ignition switch ON

11 to 14 V

*a

Front view of wire harness connector

(to DCM (Telematics Transceiver))
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER))

(a) Disconnect the D197 radio and display receiver assembly connector.

(b) Disconnect the D190 DCM (telematics transceiver) connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

D197-10 (USBV) - D190-5 (USBV)

Always

Below 1 Ω

D197-11 (USBG) - D190-3 (USBG)

Always

Below 1 Ω

D197-10 (USBV) or D190-5 (USBV) - Body ground

Always

10 kΩ or higher

D197-11 (USBG) or D190-3 (USBG) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

4.

INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY

(a) Disconnect the radio and display receiver assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

D197-11 (USBG) - Body ground

Always

Below 1 Ω

*a

Component without harness connected

(Radio and Display Receiver Assembly)

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

D197-10 (USBV) - D197-11 (USBG)

Ignition switch ACC

4.75 to 5.25 V
NG

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

OK

5.

CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - NAVIGATION ECU)

(a) Disconnect the D73 DCM (telematics transceiver) connector.

(b) Disconnect the D190 navigation ECU connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

D190-2 (USB+) - V7-1 (USB+)

Always

Below 1 Ω

D190-1 (USB-) - V7-2 (USB-)

Always

Below 1 Ω

D190-6 (USBS) - V7-3 (USBS)

Always

Below 1 Ω

D190-2 (USB+) or V7-1 (USB+) - Body ground

Always

10 kΩ or higher

D190-1 (USB-) or V7-2 (USB-) - Body ground

Always

10 kΩ or higher

D190-6 (USBS) or V7-3 (USBS) - Body ground

Always

10 kΩ or higher

*a

Front view of wire harness connector

(to DCM (telematics transceiver))

*b

Front view of wire harness connector

(to Navigation ECU)
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

6.

CHECK DCM (TELEMATICS TRANSCEIVER)

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

Click here 2018 - 2020 MY Sienna [11/2017 -        ]; CELLULAR COMMUNICATION: MAYDAY ECU: REMOVAL

(b) Clear the DTCs.

(c) Turn the ignition switch off.

(d) Turn the ignition switch ON and wait for 90 seconds.

(e) Recheck for DTCs and check that no DTCs are output.

OK:

No DTCs are output.

OK

END (DCM [TELEMATICS TRANSCEIVER] IS DEFECTIVE)
NG

7.

CHECK NAVIGATION ECU

(a) Replace the navigation ECU with a new one.

Click here 2018 - 2020 MY Sienna [11/2017 -        ]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION ECU: REMOVAL

(b) Clear the DTCs.

(c) Turn the ignition switch off.

(d) Turn the ignition switch ON and wait for 90 seconds.

(e) Recheck for DTCs and check that no DTCs are output.

OK:

No DTCs are output.

OK

END (NAVIGATION ECU IS DEFECTIVE)
NG

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY