Last Modified: 04-05-2023 |
6.11:8.1.0 |
Doc ID: RM1000000019RPD |
Model Year Start: 2018 |
Model: Sienna |
Prod Date Range: [11/2017 -
] |
Title: NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: Radio Broadcast cannot be Received or Poor Reception; 2018 - 2020 MY Sienna [11/2017 - ] |
Radio Broadcast cannot be Received or Poor Reception
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CAUTION / NOTICE / HINT
NOTICE:
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Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Navigation System.
Click here
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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:
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A communication malfunction DTC may be stored.
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The radio and display receiver assembly may not operate normally.
PROCEDURE
1.
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CHECK IF RADIO AUTO-SEARCH FUNCTIONS PROPERLY
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(a) Check the radio automatic station search function.
(1) Check the radio automatic station search function by activating it.
OK:
Automatic station search function stops on a station.
NG
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2.
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CHECK OPTIONAL COMPONENTS
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(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 |
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REMOVE OPTIONAL COMPONENTS AND CHECK AGAIN (SEE NOTICE ABOVE)
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NG
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3.
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CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY (ANTENNA)
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(a) Remove the antenna connector from the radio and display receiver assembly.
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(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.
OK
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(a) Check for continuity of the antenna.
HINT:
Check for continuity at the center of each antenna wire as shown in the illustration.
NOTICE:
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When cleaning the glass, wipe it in the direction of the wire with a soft dry cloth. Take care not to damage the wire.
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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.
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*a
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Tester Probe
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*b
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Antenna Wire
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*c
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Aluminum Foil
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NG |
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REPAIR GLASS ANTENNA
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OK
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5.
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INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY
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(a) Disconnect the radio and display receiver assembly connector.
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*a
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Component without harness connected
(Radio and Display Receiver Assembly)
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(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
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Switch Condition
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Specified Condition
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5 (ANT+) - Body ground
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Ignition switch ACC, radio switch on and FM or AM selected
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11 to 14 V
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OK
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6.
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CHECK NO. 2 ANTENNA CORD SUB-ASSEMBLY (ROOF HEADLINING ASSEMBLY)
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(a) Disconnect the No. 2 antenna cord sub-assembly (roof headlining assembly) connector from radio and display receiver assembly.
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*a
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Front view of wire harness connector
(to Radio and Display Receiver Assembly)
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*b
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Front view of wire harness connector
(to Amplifier Antenna Assembly)
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(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
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Condition
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Specified Condition
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2 - 3 (MAIN)
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Always
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Below 1 Ω
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3 - 1 (ANT+)
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Always
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Below 1 Ω
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3 (MAIN) - Body ground
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Always
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10 kΩ or higher
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1 (ANT+) - Body ground
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Always
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10 kΩ or higher
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OK
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7.
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REPLACE ANTENNA CORD SUB-ASSEMBLY
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(a) Replace the antenna cord sub-assembly (for navigation antenna) with a new or known good one and check if radio broadcasts can be received normally.
Click here
OK:
Radio broadcasts can be received normally.
OK
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8.
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CHECK AMPLIFIER ANTENNA ASSEMBLY
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(a) Replace the amplifier antenna assembly and check if radio broadcasts can be received normally.
Click here
OK:
Radio broadcasts can be received normally.
OK |
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END (AMPLIFIER ANTENNA ASSEMBLY WAS DEFECTIVE)
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