Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM1000000019001
Model Year Start: 2018 Model: Sienna Prod Date Range: [11/2017 -           ]
Title: NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: B15D3; Stereo Component Amplifier Disconnected; 2018 - 2020 MY Sienna [11/2017 -        ]

DTC

B15D3

Stereo Component Amplifier Disconnected

DESCRIPTION

The radio and display receiver assembly and stereo component amplifier assembly are connected by the AVC-LAN communication line.

DTC Code

DTC Detection Condition

Trouble Area

B15D3

When either of the following conditions is met:

  • Stereo component amplifier assembly is/was not connected while the ignition switch is/was ON or ACC
  • Communication between the master unit and the stereo component amplifier assembly is not possible when the engine is started.
  • Stereo component amplifier assembly power source circuit
  • AVC-LAN circuit between radio and display receiver assembly and stereo component amplifier assembly
  • Stereo component amplifier assembly
  • Radio and display receiver assembly
  • Harness or connector

HINT:

The radio and display receiver assembly is the master unit.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • When replacing the radio and display receiver assembly, always replace it with a new one. If a radio and display receiver assembly which was installed to another vehicle is used, the following may occurs:
    • A communication malfunction DTC may be stored.
    • The radio and display receiver assembly may not operate normally.

PROCEDURE

1.

CHECK DTC

(a) If DTC B15C3 is output, perform troubleshooting for DTC B15C3 first.

Result

Proceed to

DTC B15C3 is not output.

A

DTC B15C3 is output.

B

B

GO TO DTC B15C3

A

2.

CHECK OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING)

(a) Check that optional components (including associated wiring) which generate radio waves are not installed.

Result

Result

Proceed to

Optional components (including associated wiring) are installed.

A

Optional components (including associated wiring) are not installed.

B

HINT:

  • Electrical noise from radio waves generated by optional components or the wiring for those components may affect AVC-LAN communication.
  • This DTC may be stored when an AVC-LAN communication error occurs due to electrical noise.
B

GO TO STEP 4

A

3.

REMOVE OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING)

(a) Remove optional components (including associated wiring).

NOTICE:

Do not remove optional components or associated wiring without the permission of the customer.

Result

Proceed to

NEXT

NEXT

4.

CHECK DTC

(a) Clear the DTCs

Click here 2018 - 2020 MY Sienna [11/2017 -        ]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: DTC CHECK / CLEAR

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

Click here 2018 - 2020 MY Sienna [11/2017 -        ]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: DTC CHECK / CLEAR

OK:

No DTCs are output.

OK

END

NG

5.

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY POWER SOURCE)

(a) Disconnect the L34 and L56 stereo component amplifier assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

L34-2 (GND) - Body ground

Always

Below 1 Ω

L34-6 (GND2) - 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

L34-1 (+B) - L34-2 (GND)

Always

11 to 14 V

L34-3 (+B2) - L34-2 (GND)

Always

11 to 14 V

L56-12 (ACC) - L34-2 (GND)

Ignition switch ACC

11 to 14 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

6.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - STEREO COMPONENT AMPLIFIER ASSEMBLY)

(a) Disconnect the D195 radio and display receiver assembly connector.

(b) Disconnect the L56 stereo component amplifier assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D195-5 (TX1+) - L56-8 (TX+)

Always

Below 1 Ω

D195-6 (TX1-) - L56-7 (TX-)

Always

Below 1 Ω

D195-5 (TX1+) or L56-8 (TX+) - Body ground

Always

10 kΩ or higher

D195-6 (TX1-) or L56-7 (TX-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

7.

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY

(a) Replace the stereo component amplifier assembly with a new or known good one.

Click here 2016 - 2020 MY Sienna [12/2015 -        ]; AUDIO / VIDEO: STEREO COMPONENT AMPLIFIER: REMOVAL

(b) Clear the DTCs.

Click here 2018 - 2020 MY Sienna [11/2017 -        ]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: DTC CHECK / CLEAR

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

Click here 2018 - 2020 MY Sienna [11/2017 -        ]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: DTC CHECK / CLEAR

OK:

No DTCs are output.

OK

END

NG

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY