DESCRIPTION
The No. 1 stereo jack adapter assembly sends the sound signal from an external device to the navigation receiver assembly via this circuit.
If there is an open or short in the circuit, sound cannot be heard from the speakers even if there is no malfunction in the stereo component amplifier assembly, navigation receiver assembly or speakers.
WIRING DIAGRAM
PROCEDURE
1. |
CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - NO. 1 STEREO JACK ADAPTER ASSEMBLY) |
(a) Disconnect the N25 navigation receiver assembly connector.
(b) Disconnect the N3 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 |
---|---|---|
N25-25 (ADPG) - N3-8 (AUXO) |
Always |
Below 1 Ω |
N25-26 (VAR+) - N3-5 (ARO) |
Always |
Below 1 Ω |
N25-28 (VAL+) - N3-6 (ALO) |
Always |
Below 1 Ω |
N25-27 (VA-) - N3-7 (ASGN) |
Always |
Below 1 Ω |
N25-11 (AGND) - N3-9 (AGND) |
Always |
Below 1 Ω |
N25-25 (ADPG) - Body ground |
Always |
10 kΩ or higher |
N25-26 (VAR+) - Body ground |
Always |
10 kΩ or higher |
N25-28 (VAL+) - Body ground |
Always |
10 kΩ or higher |
N25-27 (VA-) - Body ground |
Always |
10 kΩ or higher |
N25-11 (AGND) - Body ground |
Always |
10 kΩ or higher |
OK | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Reverse Signal Circuit
DESCRIPTION
The radio and display receiver assembly*1 or navigation receiver assembly*2 receives
a reverse signal from the park/neutral position switch*3 or the back-up light switch
assembly*4.
*1: w/o Navigation System
*2: w/ Navigation System
*3: for Automatic Transmission
...
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms.
If multiple suspected areas are listed, the potential causes of the symptoms
are listed in order of probability in the "Suspected Area" column of the
table. Check each sy ...
Removal
REMOVAL
PROCEDURE
1. REMOVE RADIATOR GRILLE
(a) w/ Toyota Safety Sense P
(1) Disconnect the connector.
(2) Disengage the clamp.
(b) Put protective tape around the radiator grille.
...