Toyota Tacoma (2015-2018) Service Manual: Data Signal Circuit between Navigation Receiver Assembly and Extension Module
DESCRIPTION
The stereo component tuner assembly sends the sound data signal or image data signal from a device to the navigation receiver assembly via this circuit.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
After replacing the stereo component tuner assembly of vehicles subscribed to pay-type satellite radio broadcasts, XM radio ID registration is necessary.
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - STEREO COMPONENT TUNER ASSEMBLY) |
(a) Disconnect the N19, N27 and N28 navigation receiver assembly connectors.
(b) Disconnect the S52, S53 and S54 stereo component tuner assembly connectors.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
N27-1 (USV4) - S53-1 (USV4) |
Always |
Below 1 Ω |
|
N27-2 (US4-) - S53-2 (US4-) |
Always |
Below 1 Ω |
|
N27-3 (US4+) - S53-3 (US4+) |
Always |
Below 1 Ω |
|
N27-4 (UGO4) - S53-4 (UGO4) |
Always |
Below 1 Ω |
|
N27-5 (USG4) - S53-5 (USG4) |
Always |
Below 1 Ω |
|
N19-4 (+B2) - S52-4 (+B2) |
Always |
Below 1 Ω |
|
N19-3 (ACC2) - S52-3 (ACC2) |
Always |
Below 1 Ω |
|
N19-8 (GND2) - S52-8 (GND2) |
Always |
Below 1 Ω |
|
N28-1 (LVDS) - S54-1 (LVDS) |
Always |
Below 1 Ω |
|
N27-1 (USV4) - Body ground |
Always |
10 kΩ or higher |
|
N27-2 (US4-) - Body ground |
Always |
10 kΩ or higher |
|
N27-3 (US4+) - Body ground |
Always |
10 kΩ or higher |
|
N27-4 (UGO4) - Body ground |
Always |
10 kΩ or higher |
|
N27-5 (USG4) - Body ground |
Always |
10 kΩ or higher |
|
N19-4 (+B2) - Body ground |
Always |
10 kΩ or higher |
|
N19-3 (ACC2) - Body ground |
Always |
10 kΩ or higher |
|
N19-8 (GND2) - Body ground |
Always |
10 kΩ or higher |
|
N28-1 (LVDS) - Body ground |
Always |
10 kΩ or higher |
| NG | .gif) |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
.gif)
|
2. |
CHECK NO. 1 NAVIGATION WIRE |
(a) Replace the No. 1 navigation wire with a known good one (See page
.gif)
).
(b) Check that the malfunction disappears.
OK:
Malfunction disappears.
| OK | |
END (NO. 1 NAVIGATION WIRE WAS DEFECTIVE) |
| NG | |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
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 navigation receiver assembly via this circuit.
If there is an open or short in the circuit, ...
Mute Signal Circuit between Radio Receiver and Stereo Component Amplifier
DESCRIPTION
This circuit sends a signal to the stereo component amplifier assembly to mute
noise. Because of that, the noise produced by changing the sound source ceases.
If there is an open in th ...
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SYSTEM DESCRIPTION
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SYSTEM DESCRIPTION
The ECM uses the vehicle speed signal and signals from the transmission revolution
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The ECM compares the actual gear with the shift schedule in the ECM memory to
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Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms.
If multiple suspected areas are listed, the potential causes of the symptoms
are listed in order of probability in the "Suspected Area" column of the
table. Check each sy ...
