Last Modified: 05-13-2024 |
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 Single Knob 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)
|
-
Harness or connector
-
Stereo component amplifier assembly
-
Front No. 1 speaker assembly LH
-
Front No. 2 speaker assembly LH
-
Front No. 3 speaker assembly LH
|
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
(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
|
A
|
|
|
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
|
OK
|
|
|
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
|
OK
|
|
|
4.
|
INSPECT FRONT NO. 1 SPEAKER ASSEMBLY LH
|
Click here
OK
|
|
|
(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)
|
B
|
|
|
6.
|
REPLACE FRONT NO. 3 SPEAKER ASSEMBLY LH
|
(a) Replace the speaker assembly with a new or known good one.
Click here
NEXT
|
|
|
(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)
|
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
|
OK
|
|
|
9.
|
REPLACE FRONT NO. 2 SPEAKER ASSEMBLY LH
|
(a) Replace the speaker assembly with a new or known good one.
Click here
NEXT
|
|
|
(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)
|
|