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:
Removal
REMOVAL
PROCEDURE
1. REMOVE JACK BOX HOLE COVER
2. REMOVE REAR QUARTER PANEL MUDGUARD LH
3. REMOVE REAR QUARTER PANEL MUDGUARD RH
HINT:
Use the same procedure as for the LH side.
4. REMOVE REAR BUMPER COVER
(a) Remove the 2 bolts and 2 screws.
...
Back-up Power Source Circuit
DESCRIPTION
The back-up power source circuit for the air conditioning amplifier assembly
is shown below. Power is supplied even after the ignition switch is turned off and
is used for diagnostic trouble code memory, etc.
WIRING DIAGRAM
CAUTION / NOTIC ...
0.0075