| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM1000000026LIR |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [09/2022 - ] |
| Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Single Knob Type): B15A387; Stereo Component Amplifier Missing Message; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - ] | ||
|
DTC |
B15A387 |
Stereo Component Amplifier Missing Message |
DESCRIPTION
This DTC is stored when the radio and display receiver assembly detects that the stereo component amplifier assembly has disconnected.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
DTC Output from |
Priority |
|---|---|---|---|---|---|
|
B15A387 |
Stereo Component Amplifier Missing Message |
When 60 seconds has elapsed after turning the ignition switch to ON and the stereo component amplifier assembly cannot be detected, the stereo component amplifier assembly is judged to be disconnected after comparison with the past registered devices history. (2 trip detection logic) |
|
Navigation System |
A |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following procedure.
-
Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed.
Click here
![2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - ]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Single Knob Type): PRECAUTION](/t3Portal/stylegraphics/info.gif)
HINT:
There may be a communication malfunction due to noise affecting communication between devices on the AVC-LAN.
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - POWER SOURCE AND BODY GROUND) |
(a) Disconnect the I54 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 |
|---|---|---|
|
I54-3 (GND) - 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 |
|---|---|---|
|
I54-1 (+B) - Body ground |
Always*1 IG OFF*2 |
11 to 14 V |
- *1: for Gasoline Model
- *2: for HV Model
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
2. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - STEREO COMPONENT AMPLIFIER ASSEMBLY) |
(a) Disconnect the I175 radio and display receiver assembly connector.
(b) Disconnect the I68 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 |
|---|---|---|
|
I175-1 (TX1+) - I68-8 (TX+) |
Always |
Below 1 Ω |
|
I175-2 (TX1-) - I68-7 (TX-) |
Always |
Below 1 Ω |
|
I175-1 (TX1+) or I68-8 (TX+) - Body ground |
Always |
10 kΩ or higher |
|
I175-2 (TX1-) or I68-7 (TX-) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY |
(a) Replace the stereo component amplifier assembly with a new or known good one.
Click here
|
|
4. |
CHECK FOR DTC |
(a) Clear the DTCs.
Body Electrical > Navigation System > Clear DTCs
(b) Turn the ignition switch off.
(c) Turn the ignition switch to ON and wait for 60 seconds.
(d) Turn the ignition switch off.
(e) Turn the ignition switch to ON and wait for 60 seconds.
(f) Check for DTCs and proceed to the following step.
Body Electrical > Navigation System > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTC B15A387 is output |
B |
| A |
|
END (STEREO COMPONENT AMPLIFIER ASSEMBLY IS DEFECTIVE) |
| B |
|
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY
|
|
|