| Last Modified: 11-29-2007 | 1.6 J | |
| Service Category: Audio/Visual/Telematics | Section: Audio/Video | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000003F4S000X |
| Title: AUDIO / VIDEO: REAR SEAT ENTERTAINMENT SYSTEM: DESCRIPTION (2008 Sequoia) | ||
|
Sound Signal Circuit between Headphone Terminal and Television Display |
DESCRIPTION
This circuit sends a sound signal from the television display to the headphone.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
CHECK HEADPHONE |
(a) Check the malfunctioning headphones.
Result
|
Result |
Proceed to |
|---|---|
|
Malfunction in headphone RH side |
A |
|
Malfunction in headphone LH side |
B |
|
|
2. |
CHECK HARNESS AND CONNECTOR (TELEVISION DISPLAY ASSEMBLY - HEADPHONE JACK RH) |
|
(a) Disconnect the U2 television display assembly connector. |
(b) Disconnect the S7 headphone jack RH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
U2-3(HP2R) - S7-1(HP2R) |
Always |
Below 1 Ω |
|
U2-19(HP2L) - S7-2(HP2L) |
||
|
U2-4(SLD2) - S7-3(SG8) |
||
|
U2-3(HP2R) - Body ground |
Always |
10 kΩ or higher |
|
U2-19(HP2L) - Body ground |
||
|
U2-4(SLD2) - Body ground |
(d) Reconnect the television display assembly connector.
(e) Reconnect the headphone jack RH connector.
|
|
3. |
INSPECT TELEVISION DISPLAY ASSEMBLY |
|
(a) Using an oscilloscope, check the waveform between each terminal and the body ground according to the conditions, as shown in the table below. OK: Waveform:
|
|
|
4. |
CHECK HARNESS AND CONNECTOR (TELEVISION DISPLAY ASSEMBLY - HEADPHONE JACK LH) |
|
(a) Disconnect the U2 television display assembly connector. |
(b) Disconnect the S8 headphone jack LH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
U2-5(HP1R) - S8-1(HP1R) |
Always |
Below 1 Ω |
|
U2-21(HP1L) - S8-2(HP1L) |
||
|
U2-20(SLD1) - S8-3(SG7) |
||
|
U2-5(HP1R) - Body ground |
Always |
10 kΩ or higher |
|
U2-21(HP1L) - Body ground |
||
|
U2-20(SLD1) - Body ground |
(d) Reconnect the television display assembly connector.
(e) Reconnect the headphone jack LH connector.
|
|
5. |
INSPECT TELEVISION DISPLAY ASSEMBLY |
|
(a) Using an oscilloscope, check the waveform between each terminal and the body ground according to the conditions, as shown in the table below. OK: Waveform:
|
|
|
|