DESCRIPTION
The radio receiver assembly and stereo component amplifier assembly are connected via MOST communication lines.
When a MOST communication error occurs between the radio receiver assembly and stereo component amplifier assembly, this DTC will be stored.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
---|---|---|---|
B15D3 | Stereo Component Amplifier Disconnected | A device that is listed in the MOST network connected device record of the master unit is missing. |
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HINT:
For the MOST network, the radio receiver assembly is the master unit.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Click here
PROCEDURE
1. | CHECK DTC |
(a) If DTC B15C3 is output, perform troubleshooting for DTC B15C3 first.
Result | Proceed to |
---|---|
DTC B15C3 is not output. | A |
DTC B15C3 is output. | B |
B | ![]() | GO TO DTC B15C3 |
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2. | CHECK OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING) |
(a) Check that optional components (including associated wiring) which generate radio waves are not installed.
Result | Proceed to |
---|---|
Optional components (including associated wiring) are installed. | A |
Optional components (including associated wiring) are not installed. | B |
HINT:
B | ![]() | GO TO STEP 4 |
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3. | REMOVE OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING) |
(a) Remove optional components (including associated wiring).
NOTICE:
Do not remove optional components or associated wiring without the permission of the customer.
|
4. | CHECK DTC |
(a) Clear the DTCs.
Body Electrical > Navigation System > Clear DTCs(b) Recheck for DTCs and check that no DTCs are output.
Body Electrical > Navigation System > Trouble CodesOK:
No DTCs are output.
OK | ![]() | END |
|
5. | CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY POWER SOURCE) |
(a) Disconnect the J66 stereo component amplifier assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
J66-3 (GND) - Body ground | Always | Below 1 Ω |
J66-18 (GND2) - Body ground | Always | Below 1 Ω |
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection | Condition | Specified Condition |
---|---|---|
J66-1 (+B) - J66-3 (GND) | Always | 11 to 14 V |
J66-16 (+B2) - J66-3 (GND) | Always | 11 to 14 V |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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6. | CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - STEREO COMPONENT AMPLIFIER ASSEMBLY) |
(a) Disconnect the J122 radio receiver assembly connector.
(b) Disconnect the J123 stereo component amplifier assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
J122-5 (MO+) - J123-2 (MI+) | Always | Below 1 Ω |
J122-6 (MO-) - J123-3 (MI-) | Always | Below 1 Ω |
J122-7 (SLDO) - J123-4 (SLDI) | Always | Below 1 Ω |
J122-2 (MI+) - J123-5 (MO+) | Always | Below 1 Ω |
J122-3 (MI-) - J123-6 (MO-) | Always | Below 1 Ω |
J122-4 (SLDI) - J123-7 (SLDO) | Always | Below 1 Ω |
J122-5 (MO+) or J123-2 (MI+) - Body ground | Always | 10 kΩ or higher |
J122-6 (MO-) or J123-3 (MI-) - Body ground | Always | 10 kΩ or higher |
J122-7 (SLDO) or J123-4 (SLDI) - Body ground | Always | 10 kΩ or higher |
J122-2 (MI+) or J123-5 (MO+) - Body ground | Always | 10 kΩ or higher |
J122-3 (MI-) or J123-6 (MO-) - Body ground | Always | 10 kΩ or higher |
J122-4 (SLDI) or J123-7 (SLDO) - Body ground | Always | 10 kΩ or higher |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
7. | REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY |
(a) Replace the stereo component amplifier assembly with a new or known good one.
Click here
(b) Clear the DTCs.
Body Electrical > Navigation System > Clear DTCs(c) Recheck for DTCs and check that no DTCs are output.
Body Electrical > Navigation System > Trouble CodesOK:
No DTCs are output.
OK | ![]() | END |
NG | ![]() | REPLACE RADIO RECEIVER ASSEMBLY |
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