| Last Modified: 06-05-2026 | 6.11:8.1.0 | Doc ID: RM0000003TPDIJY |
| Model Year Start: 2026 | Model: GR Corolla | Prod Date Range: [08/2025 - ] |
| Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for 8 Inch Display Type (w/ Single Knob Type) or 10.5 Inch Display Type): B1ADF71; Sub Woofer Speaker Cable Actuator Stuck; 2026 MY GR Corolla Corolla Corolla Hatchback Corolla HV [08/2025 - ] | ||
|
DTC |
B1ADF71 |
Sub Woofer Speaker Cable Actuator Stuck |
DESCRIPTION
This DTC is stored when the stereo component amplifier assembly detects an open in the sub-woofer speaker circuit by energizing the speaker line.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
DTC Output from |
Priority |
|---|---|---|---|---|---|
|
B1ADF71 |
Sub Woofer Speaker Cable Actuator Stuck |
Open in the sub-woofer speaker circuit is detected. (1 trip detection logic) |
|
Navigation System |
A |
- *1: for Sedan Model
- *2: for Hatchback Model (GR)
WIRING DIAGRAM
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - REAR NO. 2 SPEAKER ASSEMBLY) |
(a) Disconnect the I54 stereo component amplifier assembly connector.
(b) Disconnect the O71 rear No. 2 speaker assembly connector.*1
(c) Disconnect the O71 rear No. 3 speaker assembly.*2
- *1: for Sedan Model
- *2: for Hatchback Model (GR)
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I54-10 (WF1+) - O71-4 (WF1+) |
Always |
Below 1 Ω |
|
I54-25 (WF1-) - O71-3 (WF1-) |
Always |
Below 1 Ω |
|
I54-8 (WF2+) - O71-2 (WF2+) |
Always |
Below 1 Ω |
|
I54-23 (WF2-) - O71-1 (WF2-) |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
2. |
CHECK MODEL |
(a) Choose the model to be inspected.
Result
|
Result |
Proceed to |
|---|---|
|
for Sedan Model |
A |
|
for Hatchback Model (GR) |
B |
| B |
|
|
|
3. |
INSPECT REAR NO. 2 SPEAKER ASSEMBLY |
Click here
![2020 - 2026 MY GR Corolla Corolla Corolla Hatchback Corolla HV [01/2019 - ]; AUDIO / VIDEO: REAR PACKAGE TRAY SPEAKER: INSPECTION](/t3Portal/stylegraphics/info.gif)
| NG |
|
|
|
4. |
CHECK FOR DTC |
(a) Clear the DTCs.
Body Electrical > Navigation System > Clear DTCs
(b) In accordance with the display of the GTS, perform a speaker circuit energization inspection.
Click here
Body Electrical > Navigation System > Utility
(c) Check for DTCs and proceed to the following step.
Body Electrical > Navigation System > Trouble Codes
Result
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTC B1ADF71 is output |
B |
| A |
|
END (REAR NO. 2 SPEAKER ASSEMBLY IS DEFECTIVE) |
| B |
|
REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY
Click here
|
|
5. |
INSPECT REAR NO.3 SPEAKER ASSEMBLY |
Click here
|
|
|
|