Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJ3R
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 11/2017]
Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Radio Broadcast cannot be Received (Bad Reception); 2016 - 2017 MY Sienna [12/2015 - 11/2017]

Radio Broadcast cannot be Received (Bad Reception)

PROCEDURE

1.

CHECK IF RADIO AUTO-SEARCH FUNCTIONS PROPERLY

(a) Check the radio automatic station search function by activating it.

OK:

Automatic station search function stops on a station.

OK

USE SIMULATION METHOD TO CHECK

(See page 2016 MY Sienna [12/2015 - 08/2016]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2017 MY Sienna [08/2016 - 11/2017]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING )
NG

2.

CHECK OPTIONAL COMPONENTS

(a) Check if any optional components that may decrease reception capacity, such as sunshade film or a telephone antenna, are installed.

OK:

Optional components are installed.

NOTICE:

Do not remove optional components without permission of the customer.

OK

REMOVE OPTIONAL COMPONENTS AND CHECK AGAIN (SEE NOTICE ABOVE)
NG

3.

INSPECT QUARTER WINDOW ASSEMBLY (WINDOW GLASS ANTENNA WIRE)

(a) Inspect the quarter window assembly (window glass antenna wire) (See page 2016 - 2020 MY Sienna [12/2015 -        ]; AUDIO / VIDEO: WINDOW GLASS ANTENNA WIRE: REPAIR ).

NG

REPAIR QUARTER WINDOW ASSEMBLY (WINDOW GLASS ANTENNA WIRE)

OK

4.

CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY (ANTENNA)

(a) Remove the antenna connector from the radio and display receiver assembly.

(b) Turn the ignition switch to ACC with the radio and display receiver assembly connector connected.

(c) Turn on the radio and turn into AM mode.

(d) Place a screwdriver, thin wire or other metal object on the radio and display receiver assembly antenna jack and check that noise can be heard from the speakers.

OK:

Noise occurs.

NG

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

OK

5.

INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY

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

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

5 (ANT+) - Body ground

Ignition switch ACC, radio switch on and FM or AM selected

11 to 14 V
NG

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

OK

6.

CHECK ANTENNA CORD SUB-ASSEMBLY

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

(b) Disconnect the antenna cord sub-assembly connector from the amplifier antenna assembly.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

RA-3 (MAIN) - 2

Always

Below 1 Ω

RA-5 (ANT+) - 3

Always

Below 1 Ω

RA-3 (MAIN) - Body ground

Always

10 kΩ or higher

RA-5 (ANT+) - Body ground

Always

10 kΩ or higher

Text in Illustration

*a

Front view of wire harness connector

(to Amplifier Antenna Assembly)

*b

Front view of wire harness connector

(to Radio and Display Receiver Assembly)
NG

REPLACE ANTENNA CORD SUB-ASSEMBLY
OK

7.

CHECK NO. 2 ANTENNA CORD SUB-ASSEMBLY (ROOF HEADLINING ASSEMBLY)

(a) Disconnect the No. 2 antenna cord sub-assembly (roof headlining assembly) connector from radio and display receiver assembly.

(b) Disconnect the No. 2 antenna cord sub-assembly (roof headlining assembly) connector from the amplifier antenna assembly.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

2 - 3 (MAIN)

Always

Below 1 Ω

3 - 1 (ANT+)

Always

Below 1 Ω

3 (MAIN) - Body ground

Always

10 kΩ or higher

1 (ANT+) - Body ground

Always

10 kΩ or higher

Text in Illustration

*a

Front view of wire harness connector

(to Radio and Display Receiver Assembly)

*b

Front view of wire harness connector

(to Amplifier Antenna Assembly)
NG

REPLACE ROOF HEADLINING ASSEMBLY
OK

8.

CHECK GLASS ANTENNA

(a) Check for continuity of the antenna.

HINT:

Check for continuity at the center of each antenna wire as shown in the illustration.

NOTICE:

  • When cleaning the glass, wipe it in the direction of the wire with a soft dry cloth. Take care not to damage the wire.
  • Do not use detergents or glass cleaners with abrasive ingredients. When measuring resistance, wrap a piece of aluminum foil around the tip of each probe and press the foil against the wire with your finger, as shown in the illustration.

OK:

There is continuity in the antenna.

Text in Illustration

*a

Tester Probe

*b

Antenna Wire

*c

Aluminum Foil
NG

REPAIR GLASS ANTENNA
OK

9.

CHECK AMPLIFIER ANTENNA ASSEMBLY

(a) Replace the amplifier antenna assembly and check if radio broadcasts can be received normally.

OK:

Radio broadcasts can be received normally.

OK

END (AMPLIFIER ANTENNA ASSEMBLY WAS DEFECTIVE)
NG

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY