| Last Modified: 11-27-2007 | 1.6 J | |
| Service Category: Audio/Visual/Telematics | Section: Audio/Video | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM0000015J100TX |
| Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: DESCRIPTION (2008 LX570) | ||
|
Mute Signal Circuit between Radio Receiver and Multi-display Controller |
DESCRIPTION
The multi-display selector controls the volume according to the mute signal from the radio receiver.
The mute signal is sent to reduce noise and a popping sound generated when switching the mode, etc.
HINT:
"Multi-display Controller" refers to the multi-display selector.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
CHECK MULTI-DISPLAY SELECTOR |
|
(a) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
|
2. |
CHECK VEHICLE EQUIPMENT |
(a) Check if the SDARS system is equipped on the vehicle.
Result
|
Result |
Proceed to |
|---|---|
|
w/ SDARS System |
A |
|
w/o SDARS System |
B |
|
|
3. |
CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO COMPONENT TUNER) |
|
(a) Disconnect the F24 receiver connector. |
(b) Disconnect the L37 tuner connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
F24-6 (MUTE) - L37-6 (MUTE) |
Always |
Below 1 Ω |
|
F24-6 (MUTE) - Body ground |
Always |
10 kΩ or higher |
|
|
4. |
CHECK HARNESS AND CONNECTOR (STEREO COMPONENT TUNER - MULTI-DISPLAY SELECTOR) |
|
(a) Disconnect the L39 tuner connector. |
(b) Disconnect the L23 selector connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
L39-15 (MUT2) - L23-18 (MUT6) |
Always |
Below 1 Ω |
|
L23-18 (MUT6) - Body ground |
Always |
10 kΩ or higher |
|
|
5. |
CHECK STEREO COMPONENT TUNER (OPERATION) |
(a) Replace the stereo component tuner with a normal one and check if the same problem occurs again
.
OK:
Same problem does not occur.
|
|
6. |
CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - MULTI-DISPLAY SELECTOR) |
|
(a) Disconnect the F24 receiver connector. |
(b) Disconnect the L23 selector connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
F24-6 (MUTE) - L23-18 (MUT6) |
Always |
Below 1 Ω |
|
F24-6 (MUTE) - Body ground |
Always |
10 kΩ or higher |
|
|
7. |
CHECK MULTI-DISPLAY SELECTOR |
|
(a) Reconnect the L23 selector connector. |
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
L23-18 (MUT6) - Body ground |
Engine switch on (ACC), audio system is playing → changing modes |
3.5 V or higher → Below 1 V |
|
|
|