Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Speaker Output Short Actuator Stuck (B15C371)

Toyota Corolla Cross (2022-2024) Service Manual / Audio & Visual & Telematics / Audio / Video / Audio And Visual System / Speaker Output Short Actuator Stuck (B15C371)

DESCRIPTION

This DTC is stored when the radio and display receiver assembly*1 or stereo component amplifier assembly*2 detects a short in a speaker circuit.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

Priority

B15C371

Speaker Output Short Actuator Stuck

When any of the following conditions is met:

(2 trip detection logic)

  • A short is detected in the speaker output circuit
  • Internal direct current is detected in the AMP power IC
  • Harness or connector
  • Radio and display receiver assembly*1
  • Stereo component amplifier assembly*2
  • Speakers
  • Telematics transceiver*3

Navigation System

A
  • *1: for 6 Speakers
  • *2: for 9 Speakers
  • *3: w/ Telematics Transceiver

WIRING DIAGRAM

for 6 Speakers for 9 Speakers

CAUTION / NOTICE / HINT

NOTICE:

  • When replacing the telematics transceiver, make sure to replace it with a new one.
  • Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed.

    Click here

PROCEDURE

1.

CHECK MODEL

Result

Proceed to

for 6 Speakers

A

for 9 Speakers

B
B

GO TO STEP 15

A

2.

CHECK MODEL

Result

Proceed to

w/o Telematics Transceiver

A

w/ Telematics Transceiver

B
B

GO TO STEP 8

A

3.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - EACH SPEAKER)

(a) Disconnect the I71 radio and display receiver assembly connector.

(b) Disconnect the I77 front No. 2 speaker assembly LH connector.

(c) Disconnect the I76 front No. 2 speaker assembly RH connector.

(d) Disconnect the M4 rear speaker assembly RH connector.

(e) Disconnect the N4 rear speaker assembly LH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I71-1 (FR+) - Body ground

Always

10 kΩ or higher

I71-2 (FL+) - Body ground

Always

10 kΩ or higher

I71-4 (RR+) - Body ground

Always

10 kΩ or higher

I71-3 (RL+) - Body ground

Always

10 kΩ or higher

I71-6 (FR-) - Body ground

Always

10 kΩ or higher

I71-7 (FL-) - Body ground

Always

10 kΩ or higher

I71-9 (RR-) - Body ground

Always

10 kΩ or higher

I71-8 (RL-) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

4.

CHECK HARNESS AND CONNECTOR (FRONT NO. 2 SPEAKER ASSEMBLY - FRONT NO. 1 SPEAKER ASSEMBLY)

(a) Disconnect the K1 front No. 1 speaker assembly RH connector.

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

(c) Disconnect the I77 front No. 2 speaker assembly RH connector.

(d) Disconnect the I76 front No. 2 speaker assembly LH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

K1-2 (+) - Body ground

Always

10 kΩ or higher

L1-2 (+) - Body ground

Always

10 kΩ or higher

K1-1 (-) - Body ground

Always

10 kΩ or higher

L1-1 (-) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

5.

INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

Click here

NG

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY

OK

6.

INSPECT FRONT NO. 2 SPEAKER ASSEMBLY

Click here

NG

REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

OK

7.

INSPECT REAR SPEAKER ASSEMBLY

Click here

OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

NG

REPLACE REAR SPEAKER ASSEMBLY

8.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - EACH SPEAKER, TELEMATICS TRANSCEIVER)

(a) Disconnect the I71 radio and display receiver assembly connector.

(b) Disconnect the I77 front No. 2 speaker assembly LH connector.

(c) Disconnect the M4 rear speaker assembly RH connector.

(d) Disconnect the N4 rear speaker assembly LH connector.

(e) Disconnect the I201 telematics transceiver connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I71-1 (FR+) - Body ground

Always

10 kΩ or higher

I71-2 (FL+) - Body ground

Always

10 kΩ or higher

I71-4 (RR+) - Body ground

Always

10 kΩ or higher

I71-3 (RL+) - Body ground

Always

10 kΩ or higher

I71-6 (FR-) - Body ground

Always

10 kΩ or higher

I71-7 (FL-) - Body ground

Always

10 kΩ or higher

I71-9 (RR-) - Body ground

Always

10 kΩ or higher

I71-8 (RL-) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

9.

CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - FRONT NO. 2 SPEAKER ASSEMBLY)

(a) Disconnect the I76 front No. 2 speaker assembly RH connector.

(b) Disconnect the I201 telematics transceiver connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I201-3 (SPO+) - Body ground

Always

10 kΩ or higher

I201-4 (SPO-) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

10.

CHECK HARNESS AND CONNECTOR (FRONT NO. 2 SPEAKER ASSEMBLY - FRONT NO. 1 SPEAKER ASSEMBLY)

(a) Disconnect the K1 front No. 1 speaker assembly RH connector.

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

(c) Disconnect the I76 front No. 2 speaker assembly RH connector.

(d) Disconnect the I77 front No. 2 speaker assembly LH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

K1-2 (+) - Body ground

Always

10 kΩ or higher

L1-2 (+) - Body ground

Always

10 kΩ or higher

K1-1 (-) - Body ground

Always

10 kΩ or higher

L1-1 (-) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

11.

INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

Click here

NG

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY

OK

12.

INSPECT FRONT NO. 2 SPEAKER ASSEMBLY

Click here

NG

REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

OK

13.

INSPECT REAR SPEAKER ASSEMBLY

Click here

NG

REPLACE REAR SPEAKER ASSEMBLY

OK

14.

INSPECT TELEMATICS TRANSCEIVER

(a) Remove the telematics transceiver.

Click here

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

1 (SPI+) - 3 (SPO+)

Always

Below 1 Ω

2 (SPI-) - 4 (SPO-)

Always

Below 1 Ω

1 (SPI+) - 2 (SPI-)

Always

10 kΩ or higher

3 (SPO+) - 4 (SPO-)

Always

10 kΩ or higher

*a

Component without harness connected

(Telematics Transceiver)
OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

NG

REPLACE TELEMATICS TRANSCEIVER

15.

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - EACH SPEAKER, TELEMATICS TRANSCEIVER)

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

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

(c) Disconnect the I76 front No. 3 speaker assembly RH connector.

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

(e) Disconnect the M4 rear speaker assembly RH connector.

(f) Disconnect the N4 rear speaker assembly LH connector.

(g) Disconnect the O195 No. 1 speaker assembly with box connector.

(h) Disconnect the I201 telematics transceiver connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I233-15 (FR+) - Body ground

Always

10 kΩ or higher

I233-13 (FL+) - Body ground

Always

10 kΩ or higher

I233-11 (RR+) - Body ground

Always

10 kΩ or higher

I233-9 (RL+) - Body ground

Always

10 kΩ or higher

I233-14 (TWR+) - Body ground

Always

10 kΩ or higher

I233-12 (TWL+) - Body ground

Always

10 kΩ or higher

I233-10 (WF1+) - Body ground

Always

10 kΩ or higher

I233-8 (WF2+) - Body ground

Always

10 kΩ or higher

I233-30 (FR-) - Body ground

Always

10 kΩ or higher

I233-28 (FL-) - Body ground

Always

10 kΩ or higher

I233-26 (RR-) - Body ground

Always

10 kΩ or higher

I233-24 (RL-) - Body ground

Always

10 kΩ or higher

I233-29 (TWR-) - Body ground

Always

10 kΩ or higher

I233-27 (TWL-) - Body ground

Always

10 kΩ or higher

I233-25 (WF1-) - Body ground

Always

10 kΩ or higher

I233-23 (WF2-) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

16.

CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - FRONT NO. 2 SPEAKER ASSEMBLY)

(a) Disconnect the I237 front No. 2 speaker assembly RH connector.

(b) Disconnect the I201 telematics transceiver connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I201-3 (SPO+) - Body ground

Always

10 kΩ or higher

I201-4 (SPO-) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

17.

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

(a) Disconnect the K1 front No. 1 speaker assembly RH connector.

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

(c) Disconnect the I76 front No. 3 speaker assembly RH connector.

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

K1-2 (+) - Body ground

Always

10 kΩ or higher

L1-2 (+) - Body ground

Always

10 kΩ or higher

K1-1 (-) - Body ground

Always

10 kΩ or higher

L1-1 (-) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

18.

INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

Click here

NG

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY

OK

19.

INSPECT FRONT NO. 2 SPEAKER ASSEMBLY

Click here

NG

REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

OK

20.

INSPECT FRONT NO. 3 SPEAKER ASSEMBLY

Click here

NG

REPLACE FRONT NO. 3 SPEAKER ASSEMBLY

OK

21.

INSPECT REAR SPEAKER ASSEMBLY

Click here

NG

REPLACE REAR SPEAKER ASSEMBLY

OK

22.

INSPECT NO. 1 SPEAKER WITH BOX ASSEMBLY

Click here

NG

INSPECT NO. 1 SPEAKER WITH BOX ASSEMBLY

OK

23.

INSPECT TELEMATICS TRANSCEIVER

(a) Remove the telematics transceiver.

Click here

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

1 (SPI+) - 3 (SPO+)

Always

Below 1 Ω

2 (SPI-) - 4 (SPO-)

Always

Below 1 Ω

1 (SPI+) - 2 (SPI-)

Always

10 kΩ or higher

3 (SPO+) - 4 (SPO-)

Always

10 kΩ or higher

*a

Component without harness connected

(Telematics Transceiver)
OK

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY

NG

REPLACE TELEMATICS TRANSCEIVER

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