Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJ1G
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 11/2017]
Title: AUDIO / VIDEO: REAR SEAT ENTERTAINMENT SYSTEM: AVC-LAN Circuit; 2016 - 2017 MY Sienna [12/2015 - 11/2017]

AVC-LAN Circuit

DESCRIPTION

Each unit of the rear seat entertainment system connected to the AVC-LAN (communication bus) transmits switch signals through the AVC-LAN.

If a short to +B or short to ground occurs in the AVC-LAN, the rear seat entertainment system will not function normally because communication is not possible.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

The radio and display receiver assembly is the master unit (w/o Navigation System).

The navigation receiver assembly is the master unit (w/ Navigation System).

PROCEDURE

1.

CONFIRM MODEL

(a) Choose the model to be inspected.

Result

Result

Proceed to

w/o Navigation System

A

w/ Navigation System

B

B

GO TO STEP 6

A

2.

INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY

(a) Remove the radio and display receiver assembly (See page 2016 - 2017 MY Sienna [12/2015 - 11/2017]; AUDIO / VIDEO: RADIO RECEIVER: REMOVAL ).

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

9 (TX+) - 10 (TX-)

Always

60 to 80 Ω

Text in Illustration

*a

Component without harness connected

(Radio and Display Receiver Assembly)

NG

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

OK

3.

CHECK HARNESS AND CONNECTOR (AVC-LAN CIRCUIT)

(a) Disconnect the D161 radio and display receiver assembly connector.

(b) Disconnect the T27 television display assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D161-9 (TX+) - T27-18 (TX1+)

Always

Below 1 Ω

D161-10 (TX-) - T27-19 (TX1-)

Always

Below 1 Ω

D161-9 (TX+) or T27-18 (TX1+) - Body ground

Always

10 kΩ or higher

D161-10 (TX-) or T27-18 (TX1-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

CHECK HARNESS AND CONNECTOR (AVC-LAN CIRCUIT)

(a) Disconnect the D70 disc player assembly connector.

(b) Disconnect the T27 television display assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D70-9 (TX+) - T27-20 (TX2+)

Always

Below 1 Ω

D70-10 (TX-) - T27-21 (TX2-)

Always

Below 1 Ω

D70-9 (TX+) or T27-20 (TX2+) - Body ground

Always

10 kΩ or higher

D70-10 (TX-) or T27-21 (TX2-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.

INSPECT MALFUNCTIONING PARTS

(a) Disconnect and reconnect each slave unit one by one until the master unit returns to normal operation.

HINT:

  • Check all slave units.
  • If disconnecting a slave unit causes the master unit to return to normal operation, the slave unit is defective and should be replaced.

OK:

Master unit returns to normal operation.

OK

REPLACE MALFUNCTIONING PARTS

NG

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

6.

INSPECT NAVIGATION RECEIVER ASSEMBLY

(a) Remove the navigation receiver assembly (See page 2016 - 2017 MY Sienna [12/2015 - 11/2017]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION RECEIVER: REMOVAL ).

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

9 (TX+) - 10 (TX-)

Always

60 to 80 Ω

Text in Illustration

*a

Component without harness connected

(Navigation Receiver Assembly)

NG

REPLACE NAVIGATION RECEIVER ASSEMBLY

OK

7.

CHECK HARNESS AND CONNECTOR (AVC-LAN CIRCUIT)

(a) Disconnect the D160 navigation receiver assembly connector.

(b) Disconnect the T27 television display assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D160-9 (TX+) - T27-18(TX1+)

Always

Below 1 Ω

D160-10 (TX-) - T27-19 (TX1-)

Always

Below 1 Ω

D160-9 (TX+) or T27-18 (TX1+) - Body ground

Always

10 kΩ or higher

D160-10 (TX-) or T27-19 (TX1-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

8.

CHECK HARNESS AND CONNECTOR (AVC-LAN CIRCUIT)

(a) Disconnect the D70 disc player assembly connector.

(b) Disconnect the T27 television display assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D70-9 (TX+) - T27-20 (TX2+)

Always

Below 1 Ω

D70-10 (TX-) - T27-21 (TX2-)

Always

Below 1 Ω

D70-9 (TX+) or T27-20 (TX2+) - Body ground

Always

10 kΩ or higher

D70-10 (TX-) or T27-21 (TX2-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

9.

INSPECT MALFUNCTIONING PARTS

(a) Disconnect and reconnect each slave unit one by one until the master unit returns to normal operation.

HINT:

  • Check all slave units.
  • If disconnecting a slave unit causes the master unit to return to normal operation, the slave unit is defective and should be replaced.

OK:

Master unit returns to normal operation.

OK

REPLACE MALFUNCTIONING PARTS

NG

REPLACE NAVIGATION RECEIVER ASSEMBLY