Toyota 4Runner: 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 navigation receiver assembly of vehicles subscribed to pay-type satellite radio broadcasts, registration of the XM radio ID is necessary.
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - STEREO COMPONENT TUNER ASSEMBLY) |
(a) Disconnect the s1 and t1 navigation receiver assembly connectors.
(b) Disconnect the s2 and t2 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 |
|---|---|---|
|
s1-1 (USV4) - s2-1 (USV4) |
Always |
Below 1 Ω |
|
s1-2 (US4-) - s2-2 (US4-) |
Always |
Below 1 Ω |
|
s1-3 (US4+) - s2-3 (US4+) |
Always |
Below 1 Ω |
|
s1-4 (UGD4) - s2-4 (UGD4) |
Always |
Below 1 Ω |
|
s1-5 (USG4) - s2-5 (USG4) |
Always |
Below 1 Ω |
|
t1-4 (+B2) - t2-4 (+B2) |
Always |
Below 1 Ω |
|
t1-3 (ACC2) - t2-3 (ACC2) |
Always |
Below 1 Ω |
|
t1-8 (GND2) - t2-8 (GND2) |
Always |
Below 1 Ω |
|
s1-1 (USV4) - Body ground |
Always |
10 kΩ or higher |
|
s1-2 (US4-) - Body ground |
Always |
10 kΩ or higher |
|
s1-3 (US4+) - Body ground |
Always |
10 kΩ or higher |
|
s1-4 (UGD4) - Body ground |
Always |
10 kΩ or higher |
|
s1-5 (USG4) - Body ground |
Always |
10 kΩ or higher |
|
t1-4 (+B2) - Body ground |
Always |
10 kΩ or higher |
|
t1-3 (ACC2) - Body ground |
Always |
10 kΩ or higher |
|
t1-8 (GND2) - Body ground |
Always |
10 kΩ or higher |
| NG |  |
REPAIR OR REPLACE HARNESS AND CONNECTOR |
|
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|
2. |
REPLACE NO. 1 NAVIGATION WIRE |
(a) Replace the No. 1 navigation wire (See page 
).
(b) Check that the malfunction disappears.
OK:
Malfunction disappears.
| OK | |
END (NO. 1 NAVIGATION WIRE IS DEFECTIVE) |
| NG | |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
Sound Signal Circuit between Navigation Receiver Assembly and Stereo Component
Amplifier
DESCRIPTION
The navigation receiver assembly sends a sound signal to the stereo component
amplifier assembly via the sound signal circuit.
The sound signal that has been sent is amplified by the s ...
Sound Signal Circuit between Navigation Receiver Assembly 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.
The sound signal that has been sent is ampli ...
Other materials about Toyota 4Runner:
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use these procedures to troubleshoot the sliding roof system.
*: Use the Techstream.
PROCEDURE
1.
VEHICLE BROUGHT TO WORKSHOP
NEXT
...
Removal
REMOVAL
PROCEDURE
1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-)
battery terminal to disable the SRS system.
NOTICE:
When disconnecting the cable, some systems ne ...
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