| Last Modified: 11-27-2007 | 1.6 J | |
| Service Category: Audio/Visual/Telematics | Section: Audio/Video | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM00000158Y00TX |
| Title: AUDIO / VIDEO: REAR SEAT ENTERTAINMENT SYSTEM: DESCRIPTION (2008 LX570) | ||
|
Sound Signal Circuit between Radio Receiver and Multi-display Controller |
DESCRIPTION
This is the sound signal circuit from the radio receiver to the multi-display selector.
HINT:
"Multi-display Controller" refers to the multi-display selector.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
CHECK MULTI-DISPLAY SELECTOR |
|
(a) Disconnect the L23 selector connector. |
(b) Using an oscilloscope, check the signal waveform between each terminal and the body ground according to the conditions shown in the chart below.
OK:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
L23-20 (L4-) - Body ground |
Audio sound is being produced |
A waveform synchronized with sound is output |
|
L23-21 (L4+) - Body ground |
Audio sound is being produced |
A waveform synchronized with sound is output |
|
L23-22 (R4-) - Body ground |
Audio sound is being produced |
A waveform synchronized with sound is output |
|
L23-23 (R4+) - Body ground |
Audio sound is being produced |
A waveform synchronized with sound is output |
|
|
2. |
CHECK VEHICLE EQUIPMENT |
(a) Check if the SDARS system is equipped on the vehicle.
Result
|
Result |
Proceed to |
|---|---|
|
w/o SDARS System |
A |
|
w/ SDARS System |
B |
|
|
3. |
CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - MULTI-DISPLAY SELECTOR) |
|
(a) Disconnect the F23 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 |
|---|---|---|
|
F23-15 (R-R+) - L23-23 (R4+) |
Always |
Below 1 Ω |
|
F23-16 (R-R-) - L23-22 (R4-) |
||
|
F23-17 (R-L+) - L23-21 (L4+) |
||
|
F23-18 (R-L-) - L23-20 (L4-) |
||
|
L23-23 (R4+) - Body ground |
Always |
10 kΩ or higher |
|
L23-22 (R4-) - Body ground |
||
|
L23-21 (L4+) - Body ground |
||
|
L23-20 (L4-) - Body ground |
|
|
4. |
CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO COMPONENT TUNER) |
|
(a) Disconnect the F23 receiver connector. |
(b) Disconnect the L39 tuner connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
F23-15 (R-R+) - L39-17 (RRI+) |
Always |
Below 1 Ω |
|
F23-16 (R-R-) - L39-18 (RRI-) |
||
|
F23-17 (R-L+) - L39-19 (RLI+) |
||
|
F23-18 (R-L-) - L39-20 (RLI-) |
||
|
F23-15 (R-R+) - Body ground |
Always |
10 kΩ or higher |
|
F23-16 (R-R-) - Body ground |
||
|
F23-17 (R-L+) - Body ground |
||
|
F23-18 (R-L-) - Body ground |
||
|
F23-14 (RSLD) - Body ground |
|
|
5. |
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 |
|---|---|---|
|
L39-2 (RLO-) - L23-20 (L4-) |
Always |
Below 1 Ω |
|
L39-3 (RLO+) - L23-21 (L4+) |
||
|
L39-4 (RRO-) - L23-22 (R4-) |
||
|
L39-5 (RRO+) - L23-23 (R4+) |
||
|
L23-20 (L4-) - Body ground |
Always |
10 kΩ or higher |
|
L23-21 (L4+) - Body ground |
||
|
L23-22 (R4-) - Body ground |
||
|
L23-23 (R4+) - Body ground |
||
|
L39-1 (SLD3) - Body ground |
|
|
6. |
REPLACE STEREO COMPONENT TUNER WITH NORMAL ONE AND CHECK |
(a) Replace the stereo component tuner with a normal one and check if the same problem occurs again
.
OK:
Same problem does not occur.
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