Toyota Tacoma (2015-2018) Service Manual: Sound Signal Circuit between Radio Receiver and Stereo Jack Adapter
DESCRIPTION
The No. 1 stereo jack adapter assembly sends the sound signal from an external device to the radio and display receiver assembly via this circuit.
If there is an open or short in the circuit, sound cannot be heard from the speakers even if there is no malfunction in the radio and display receiver assembly, or speakers.
WIRING DIAGRAM
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NO. 1 STEREO JACK ADAPTER ASSEMBLY) |
(a) Disconnect the R31 radio and display receiver assembly connector.
(b) Disconnect the N3 No. 1 stereo jack adapter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
R31-25 (ADPG) - N3-8 (AUXO) |
Always |
Below 1 Ω |
|
R31-26 (VAR+) - N3-5 (ARO) |
Always |
Below 1 Ω |
|
R31-28 (VAL+) - N3-6 (ALO) |
Always |
Below 1 Ω |
|
R31-27 (VA-) - N3-7 (ASGN) |
Always |
Below 1 Ω |
|
R31-11 (AGND) - N3-9 (AGND) |
Always |
Below 1 Ω |
|
R31-25 (ADPG) - Body ground |
Always |
10 kΩ or higher |
|
R31-26 (VAR+) - Body ground |
Always |
10 kΩ or higher |
|
R31-28 (VAL+) - Body ground |
Always |
10 kΩ or higher |
|
R31-27 (VA-) - Body ground |
Always |
10 kΩ or higher |
|
R31-11 (AGND) - Body ground |
Always |
10 kΩ or higher |
| OK | .gif) |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Speaker Circuit
DESCRIPTION
If there is a short in a speaker circuit, the radio and display receiver
assembly detects it and stops output to the speakers.
Thus sound cannot be heard from the speakers ...
Data Signal Circuit between Radio Receiver and Stereo Jack Adapter
DESCRIPTION
The No. 1 stereo jack adapter assembly sends the sound data signal or image data
signal from a USB device to the radio and display receiver assembly via this circuit.
WIRING DIAGRAM
...
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