Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Front Left Speaker Cable Actuator Stuck (B1ACB71)

Toyota Corolla Cross (2022-2026) Service Manual / Audio & Visual & Telematics / Audio / Video / Audio And Visual System / Front Left Speaker Cable Actuator Stuck (B1ACB71)

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 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

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - FRONT NO. 2 SPEAKER ASSEMBLY LH, FRONT NO. 3 SPEAKER ASSEMBLY LH)

(a) Disconnect the I233 stereo component amplifier assembly connector.

(b) Disconnect the I238 front No. 2 speaker assembly LH connector.

(c) Disconnect the I236 front No. 3 speaker assembly LH connector.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

I233-13 (FL+) - I236-4 (+TW)

Always

Below 1 Ω

I233-12 (TWL+) - I238-2 (TWL+)

Always

Below 1 Ω

I233-28 (FL-) - I236-2 (-TW)

Always

Below 1 Ω

I233-27 (TWL-) - I238-1 (TWL-)

Always

Below 1 Ω
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

2.

CHECK HARNESS AND CONNECTOR (FRONT NO. 1 SPEAKER ASSEMBLY LH - FRONT NO. 3 SPEAKER ASSEMBLY LH)

(a) Disconnect the L1 front No. 1 speaker assembly LH connector.

(b) Disconnect the I236 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

L1-1 (+) - I236-3 (+)

Always

Below 1 Ω

L1-2 (-) - I236-1 (-)

Always

Below 1 Ω
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

INSPECT FRONT NO. 1 SPEAKER ASSEMBLY LH

Click here

NG

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY LH

OK

4.

INSPECT FRONT NO. 2 SPEAKER ASSEMBLY LH

Click here

NG

REPLACE FRONT NO. 2 SPEAKER ASSEMBLY LH

OK

5.

INSPECT FRONT NO. 3 SPEAKER ASSEMBLY LH

Click here

OK

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY

NG

REPLACE FRONT NO. 3 SPEAKER ASSEMBLY LH

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