DESCRIPTION
If there is a short in a speaker circuit, the radio receiver assembly detects it and stops output to the speakers.
Thus sound cannot be heard from the speakers even if there is no malfunction in the radio receiver assembly or speakers.
WIRING DIAGRAM
PROCEDURE
1. |
CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - SPEAKERS) |
(a) Disconnect the F48 and F49 radio receiver assembly connectors.
(b) Disconnect the I1 and J1 front No. 1 speaker assembly connectors.
(c) Disconnect the F85 and F86 front No. 2 speaker assembly connectors.
(d) Disconnect the K4 and L4 rear speaker assembly connectors.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F48-1 (FR+) - F85-4 (TWR+) |
Always |
Below 1 Ω |
F48-5 (FR-) - F85-2 (TWR-) |
Always |
Below 1 Ω |
F85-3 (+) - I1-1 |
Always |
Below 1 Ω |
F85-1 (-) - I1-2 |
Always |
Below 1 Ω |
F48-2 (FL+) - F86-4 (TWL+) |
Always |
Below 1 Ω |
F48-6 (FL-) - F86-2 (TWL-) |
Always |
Below 1 Ω |
F86-3 (+) - J1-1 |
Always |
Below 1 Ω |
F86-1 (-) - J1-2 |
Always |
Below 1 Ω |
F49-1 (RR+) - K4-1 |
Always |
Below 1 Ω |
F49-3 (RR-) - K4-2 |
Always |
Below 1 Ω |
F49-2 (RL+) - L4-1 |
Always |
Below 1 Ω |
F49-6 (RL-) - L4-2 |
Always |
Below 1 Ω |
F48-1 (FR+) or F85-4 (TWR+) - Body ground |
Always |
10 kΩ or higher |
F48-5 (FR-) or F85-2 (TWR-) - Body ground |
Always |
10 kΩ or higher |
F85-3 (+) or I1-1 - Body ground |
Always |
10 kΩ or higher |
F85-1 (-) or I1-2 - Body ground |
Always |
10 kΩ or higher |
F48-2 (FL+) or F86-4 (TWL+) - Body ground |
Always |
10 kΩ or higher |
F48-6 (FL-) or F86-2 (TWL-) - Body ground |
Always |
10 kΩ or higher |
F86-3 (+) or J1-1 - Body ground |
Always |
10 kΩ or higher |
F86-1 (-) or J1-2 - Body ground |
Always |
10 kΩ or higher |
F49-1 (RR+) or K4-1 - Body ground |
Always |
10 kΩ or higher |
F49-3 (RR-) or K4-2 - Body ground |
Always |
10 kΩ or higher |
F49-2 (RL+) or L4-1 - Body ground |
Always |
10 kΩ or higher |
F49-6 (RL-) or L4-2 - Body ground |
Always |
10 kΩ or higher |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
2. |
INSPECT FRONT NO. 1 SPEAKER ASSEMBLY |
(a) Remove the front No. 1 speaker assembly.
Click here
(b) Inspect the front No. 1 speaker assembly.
Click here
NG | ![]() |
REPLACE FRONT NO. 1 SPEAKER ASSEMBLY |
|
3. |
INSPECT FRONT NO. 2 SPEAKER ASSEMBLY |
(a) Remove the front No. 2 speaker assembly.
Click here
(b) Inspect the front No. 2 speaker assembly.
Click here
NG | ![]() |
REPLACE FRONT NO. 2 SPEAKER ASSEMBLY |
|
4. |
REPLACE FRONT NO. 2 SPEAKER ASSEMBLY |
(a) Check that the malfunction disappears when a known good speaker is installed.
Click here
OK:
Malfunction disappears.
HINT:
OK | ![]() |
END (FRONT NO. 2 SPEAKER ASSEMBLY WAS DEFECTIVE) |
|
5. |
INSPECT REAR SPEAKER ASSEMBLY |
(a) Remove the rear speaker assembly.
Click here
(b) Inspect the rear speaker assembly.
Click here
OK | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
NG | ![]() |
REPLACE REAR SPEAKER ASSEMBLY |
Toyota CH-R Service Manual > Navigation System: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
NOTICE:
Depending on the parts that are replaced during vehicle inspection or
maintenance, performing initialization, registration or calibration may
be needed. Refer to Precaution for Navigation System.
Click here
When replacing the radio a ...
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PROBLEM SYMPTOMS TABLE
NOTICE:
Before replacing the main body ECU (multiplex network body ECU), refer
to REGISTRATION*1.
Click here
*1: w/ Smart Key System
When replacing the combination meter assembly, always replace it with
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