Toyota 4Runner: Data Signal Circuit between Radio Receiver and Extension Module
DESCRIPTION
The stereo component tuner assembly sends the sound data signal or image data signal from a device to the radio and display receiver assembly via this circuit.
WIRING DIAGRAM
.png)
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - STEREO COMPONENT TUNER ASSEMBLY) |
(a) Disconnect the s5 and t3 radio and display 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 |
|---|---|---|
|
s5-1 (USV4) - s2-1 (USV4) |
Always |
Below 1 Ω |
|
s5-2 (US4-) - s2-2 (US4-) |
Always |
Below 1 Ω |
|
s5-3 (US4+) - s2-3 (US4+) |
Always |
Below 1 Ω |
|
s5-4 (UGD4) - s2-4 (UGD4) |
Always |
Below 1 Ω |
|
s5-5 (USG4) - s2-5 (USG4) |
Always |
Below 1 Ω |
|
t3-4 (+B2) - t2-4 (+B2) |
Always |
Below 1 Ω |
|
t3-3 (ACC2) - t2-3 (ACC2) |
Always |
Below 1 Ω |
|
t3-8 (GND2) - t2-8 (GND2) |
Always |
Below 1 Ω |
|
s5-1 (USV4) - Body ground |
Always |
10 kΩ or higher |
|
s5-2 (US4-) - Body ground |
Always |
10 kΩ or higher |
|
s5-3 (US4+) - Body ground |
Always |
10 kΩ or higher |
|
s5-4 (UGD4) - Body ground |
Always |
10 kΩ or higher |
|
s5-5 (USG4) - Body ground |
Always |
10 kΩ or higher |
|
t3-4 (+B2) - Body ground |
Always |
10 kΩ or higher |
|
t3-3 (ACC2) - Body ground |
Always |
10 kΩ or higher |
|
t3-8 (GND2) - Body ground |
Always |
10 kΩ or higher |
| NG | .gif) |
REPAIR OR REPLACE HARNESS AND CONNECTOR |
|
.gif)
|
2. |
REPLACE NO. 1 NAVIGATION WIRE |
(a) Replace the No. 1 navigation wire (See page
.gif)
).
(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 |
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
...
Reverse Signal Circuit
DESCRIPTION
The radio and display receiver assembly receives a reverse signal from the park/neutral
position switch assembly.
WIRING DIAGRAM
PROCEDURE
1.
CHECK HARNESS A ...
Other materials about Toyota 4Runner:
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
Main Body ECU (Multiplex Network Body ECU)
DTC Code
Detection Item
See page
B1206
P/W Master Switch Communication Stop
B1273
S ...
Removal
REMOVAL
CAUTION / NOTICE / HINT
NOTICE:
When using a vise, do not overtighten it.
When installing the parts indicated by arrows, coat them with power
steering fluid (See page ).
PROCEDURE
1. DISCONNECT CABLE FROM NEGATIVE BATTERY TE ...
0.0083