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 | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
2. |
CHECK NO. 1 NAVIGATION WIRE |
(a) Replace the No. 1 navigation wire with a known good one (See page
).
(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 |
Confirm Cellular Phone Functionality
PROCEDURE
1.
CHECK CUSTOMER'S CELLULAR PHONE COMPATIBILITY
(a) Check if the cellular phone is compatible (Refer to http://www.toyota.com/entune/).
Result
Result
Proceed to
Cellular phone is compatible
A
...
Inspection
INSPECTION
PROCEDURE
1. INSPECT REAR NO. 2 POWER WINDOW REGULATOR SWITCH ASSEMBLY
*a
Component without harness connected
(Rear No. 2 Power Window Regulator Switch Assembly)
*b
Pull (Close)
*c
Push (Open)
...
Removal
REMOVAL
PROCEDURE
1. REMOVE LOWER STEERING COLUMN COVER
2. REMOVE UPPER STEERING COLUMN COVER
3. REMOVE WINDSHIELD WIPER SWITCH ASSEMBLY
(a) Disconnect the 2 connectors.
Text in Illustration
*a
Protective Tape
...