| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VJ4M |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - 11/2017] |
| Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Microphone Circuit between Microphone and Radio Receiver; 2016 - 2017 MY Sienna [12/2015 - 11/2017] | ||
|
Microphone Circuit between Microphone and Radio Receiver |
DESCRIPTION
This circuit sends a microphone signal from the microphone amplifier assembly to the radio and display receiver assembly.
It also supplies power from the radio and display receiver assembly to the microphone amplifier assembly.
WIRING DIAGRAM
PROCEDURE
|
1. |
CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY |
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D155-4 (MACC) - Body ground |
Ignition switch ACC |
4.75 to 5.25 V |
Text in Illustration
|
*a |
Component with harness connected (Radio and Display Receiver Assembly) |
| NG |
|
|
|
2. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - ROOF CONSOLE BOX ASSEMBLY) |
(a) Disconnect the D155 radio and display receiver assembly connector.
(b) Disconnect the T29 roof console box assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D155-4 (MACC) - T29-1 (MACC) |
Always |
Below 1 Ω |
|
D155-5 (MIN+) - T29-2 (MIC+) |
Always |
Below 1 Ω |
|
D155-19 (MIN-) - T29-3 (MIC-) |
Always |
Below 1 Ω |
|
D155-6 (SNS2) - T29-4 (SNS2) |
Always |
Below 1 Ω |
|
D155-4 (MACC) - Body ground |
Always |
10 kΩ or higher |
|
D155-5 (MIN+) - Body ground |
Always |
10 kΩ or higher |
|
D155-19 (MIN-) - Body ground |
Always |
10 kΩ or higher |
|
D155-18 (SGND) - Body ground |
Always |
10 kΩ or higher |
|
D155-6 (SNS2) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
REPLACE MICROPHONE AMPLIFIER ASSEMBLY WITH ANOTHER AND CHECK |
(a) Replace the microphone amplifier assembly with a known good one (See page
![2016 - 2018 MY Sienna [12/2015 - 08/2018]; AUDIO / VIDEO: MICROPHONE AMPLIFIER: REMOVAL](/t3Portal/stylegraphics/info.gif)
).
(b) Check if the same problem occurs again.
OK:
Malfunction disappears.
| OK |
|
END (MICROPHONE AMPLIFIER ASSEMBLY WAS DEFECTIVE) |
| NG |
|
|
|