| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM1000000026LIV |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [09/2022 - ] |
| Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for 8 Inch Display Type (w/ Single Knob Type) or 10.5 Inch Display Type): B1ACB71; Front Left Speaker Cable Actuator Stuck; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - ] | ||
|
DTC |
B1ACB71 |
Front Left Speaker Cable Actuator Stuck |
DESCRIPTION
This DTC is stored when the stereo component amplifier assembly detects an open in the front speaker LH circuit by energizing the speaker line.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
DTC Output from |
Priority |
|---|---|---|---|---|---|
|
B1ACB71 |
Front Left Speaker Line Cable Actuator Stuck |
Open in the front speaker LH circuit is detected. (1 trip detection logic) |
|
Navigation System |
A |
WIRING DIAGRAM
FRONT NO. 1 SPEAKER ASSEMBLY LH and FRONT NO. 3 SPEAKER ASSEMBLY LH
FRONT NO. 2 SPEAKER ASSEMBLY LH
PROCEDURE
|
1. |
CHECK PROBLEM SYMPTOM |
(a) Confirm the problem symptoms and proceed to the respective link.
|
Result |
Proceed to |
|---|---|
|
No sound is output from the front No. 1 speaker assembly LH or front No. 3 speaker assembly LH |
A |
|
No sound is output from the front No. 2 speaker assembly LH |
B |
| B |
|
|
|
2. |
CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - FRONT NO. 3 SPEAKER ASSEMBLY LH) |
(a) Disconnect the I54 stereo component amplifier assembly connector.
(b) Disconnect the I75 front No. 3 speaker assembly LH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I54-13 (FL+) - I75-4 (+TW) |
Always |
Below 1 Ω |
|
I54-28 (FL-) - I75-2 (-TW) |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
CHECK HARNESS AND CONNECTOR (FRONT NO. 1 SPEAKER ASSEMBLY LH - FRONT NO. 3 SPEAKER ASSEMBLY LH) |
(a) Disconnect the I75 front No. 3 speaker assembly LH connector.
(b) Disconnect the L1 front No. 1 speaker assembly LH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I75-3 (+) - L1-2 |
Always |
Below 1 Ω |
|
I75-1 (-) - L1-1 |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
INSPECT FRONT NO. 1 SPEAKER ASSEMBLY LH |
Click here
![2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - ]; AUDIO / VIDEO: FRONT DOOR SPEAKER: INSPECTION](/t3Portal/stylegraphics/info.gif)
| NG |
|
|
|
5. |
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
|
Tester Display |
|---|
|
Speaker Line Electricity Check |
(c) Check for DTCs and proceed to the following step.
Body Electrical > Navigation System > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTC B1ACB71 is output |
B |
| A |
|
END (FRONT NO. 1 SPEAKER ASSEMBLY LH IS DEFECTIVE) |
|
|
6. |
REPLACE FRONT NO. 3 SPEAKER ASSEMBLY LH |
(a) Replace the speaker assembly with a new or known good one.
Click here
|
|
7. |
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
|
Tester Display |
|---|
|
Speaker Line Electricity Check |
(c) Check for DTCs and proceed to the following step.
Body Electrical > Navigation System > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTC B1ACB71 is output |
B |
| A |
|
END (FRONT NO. 3 SPEAKER ASSEMBLY LH IS DEFECTIVE) |
| B |
|
REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY
|
|
8. |
CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - FRONT NO. 2 SPEAKER ASSEMBLY LH) |
(a) Disconnect the I54 stereo component amplifier assembly connector.
(b) Disconnect the I7 front no. 2 speaker assembly LH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I54-12 (TWL+) - I7-2 |
Always |
Below 1 Ω |
|
I54-27 (TWL-) - I7-1 |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
9. |
REPLACE FRONT NO. 2 SPEAKER ASSEMBLY LH |
(a) Replace the speaker assembly with a new or known good one.
Click here
|
|
10. |
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
|
Tester Display |
|---|
|
Speaker Line Electricity Check |
(c) Check for DTCs and proceed to the following step.
Body Electrical > Navigation System > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTC B1ACB71 is output |
B |
| A |
|
END (FRONT NO. 2 SPEAKER ASSEMBLY LH IS DEFECTIVE) |
| B |
|
REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY
|
|
|