| 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 - ] | ||
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Radio Broadcast cannot be Received or Poor Reception |
CAUTION / NOTICE / HINT
NOTICE:
-
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.
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![2018 - 2020 MY Sienna [11/2017 - ]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: PRECAUTION](/t3Portal/stylegraphics/info.gif)
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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:
- A communication malfunction DTC may be stored.
- The radio and display receiver assembly may not operate normally.
PROCEDURE
|
1. |
CHECK IF RADIO AUTO-SEARCH FUNCTIONS PROPERLY |
(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.
| OK |
|
|
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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) |
|
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3. |
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.
| NG |
|
|
|
4. |
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:
OK: There is continuity in the antenna. |
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| NG |
|
REPAIR GLASS ANTENNA |
|
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5. |
INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY |
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(a) Disconnect the radio and display receiver assembly connector. |
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(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 |
|
|
|
6. |
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. |
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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 |
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 |
| NG |
|
|
|
7. |
REPLACE ANTENNA CORD SUB-ASSEMBLY |
(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.
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OK:
Radio broadcasts can be received normally.
| NG |
|
|
|
8. |
CHECK AMPLIFIER ANTENNA ASSEMBLY |
(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 |
|
END (AMPLIFIER ANTENNA ASSEMBLY WAS DEFECTIVE) |
| NG |
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