| Last Modified: 11-27-2007 | 1.6 J | |
| Service Category: Audio/Visual/Telematics | Section: Audio/Video | |
| Model Year: 2008 | Model: LX570 | Doc ID: RM00000158Y00SX |
| Title: AUDIO / VIDEO: AUDIO AND VISUAL 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. |
INSPECT RADIO RECEIVER |
|
(a) Disconnect the L23 selector connector. |
(b) Using an oscilloscope, check the signal waveform between each terminal and body ground according to the conditions shown in the chart below.
OK:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
L23-13 (L6-) - Body ground |
Audio sound is being produced |
A waveform synchronized with sound is output |
|
L23-14 (L6+) - Body ground |
||
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L23-15 (R6-) - Body ground |
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L23-16 (R6+) - Body ground |
|
|
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 AND MULTI-DISPLAY SELECTOR) |
|
(a) Disconnect the F24 receiver connector. |
(b) Disconnect the L37 and L39 tuner connectors.
(c) Disconnect the L23 selector connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
F24-2 (CDR+) - L37-2 (FRO+) |
Always |
Below 1 Ω |
|
F24-3 (CDR-) - L37-3 (FRO-) |
||
|
F24-4 (CDL+) - L37-4 (FLO+) |
||
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F24-5 (CDL-) - L37-5 (FLO-) |
||
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L39-10 (FRI+) - L23-16 (R6+) |
||
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L39-9 (FRI-) - L23-15 (R6-) |
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L39-8 (FLI+) - L23-14 (L6+) |
||
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L39-7 (FLI-) - L23-13 (L6-) |
||
|
L37-1 (SLD) - Body ground |
Always |
10 kΩ or higher |
|
L37-2 (FRO+) - Body ground |
||
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L37-3 (FRO-) - Body ground |
||
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L37-4 (FLO+) - Body ground |
||
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L37-5 (FLO-) - Body ground |
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L23-16 (R6+) - Body ground |
||
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L23-15 (R6-) - Body ground |
||
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L23-14 (L6+) - Body ground |
||
|
L23-13 (L6-) - Body ground |
||
|
L23-17 (SLD6) - Body ground |
|
|
4. |
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.
|
|
5. |
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 |
|---|---|---|
|
F24-2 (CDR+) - L23-16 (R6+) |
Always |
Below 1 Ω |
|
F24-3 (CDR-) - L23-15 (R6-) |
||
|
F24-4 (CDL+) - L23-14 (L6+) |
||
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F24-5 (CDL-) - L23-13 (L6-) |
||
|
L23-13 (L6-) - Body ground |
Always |
10 kΩ or higher |
|
L23-14 (L6+) - Body ground |
||
|
L23-15 (R6-) - Body ground |
||
|
L23-16 (R6+) - Body ground |
||
|
L23-17 (SLD6) - Body ground |
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