Data Signal Circuit between Navigation Receiver Assembly and Stereo Jack Adapter
The No. 1 stereo jack adapter assembly sends the sound data signal or image data signal from a USB device to the navigation receiver assembly via this circuit.
WIRING DIAGRAM
PROCEDURE
CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - NO. 1 STEREO JACK ADAPTER ASSEMBLY)
(a) Disconnect the G40 navigation receiver assembly connector. |
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(b) Disconnect the G53 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 |
|---|---|---|
G40-2 (US1-) - G53-2 (UDO-) |
Always |
Below 1 Ω |
G40-3 (US1+) - G53-3 (UDO+) |
Always |
Below 1 Ω |
G40-5 (USG1) - G53-5 (UJSS) |
Always |
Below 1 Ω |
G40-2 (US1-) - Body ground |
Always |
10 kΩ or higher |
G40-3 (US1+) - Body ground |
Always |
10 kΩ or higher |
G40-5 (USG1) - Body ground |
Always |
10 kΩ or higher |
*a |
Front view of wire harness connector (to Navigation Receiver Assembly) |
*b |
Front view of wire harness connector (to No. 1 Stereo Jack Adapter Assembly) |
| OK | ![]() | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
Test yourself
A quick Toyota 4Runner quiz: every answer comes with an explanation and a link to the manual page.

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