Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM10000000292XB
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [11/2022 -           ]
Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Single Knob Type): B15C371; Speaker Output Short Actuator Stuck; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]

DTC

B15C371

Speaker Output Short Actuator Stuck

DESCRIPTION

This DTC is stored when the stereo component amplifier assembly*1 or radio and display receiver 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
  • Speaker
  • Stereo Component Amplifier*1
  • Radio and Display Receiver Assembly*2

Navigation System

A

  • *1: w/ "JBL" Sound System
  • *2: w/o "JBL" Sound System

WIRING DIAGRAM

w/ "JBL" Sound System
w/o "JBL" Sound System (for 6 Speakers)
w/o "JBL" Sound System (for 2 Speakers)

CAUTION / NOTICE / HINT

NOTICE:

Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed.

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Single Knob Type): PRECAUTION

PROCEDURE

1.

CHECK MODEL

(a) Choose the model to be inspected.

Result

Proceed to

w/o "JBL" Sound System with Telematics Transceiver (for 6 Speakers)

A

w/o "JBL" Sound System (for 2 Speakers)

B

w/o "JBL" Sound System without Telematics Transceiver

C

w/ "JBL" Sound System with Telematics Transceiver

D

B

GO TO STEP 10

C

GO TO STEP 14

D

GO TO STEP 20

A

2.

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

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

(b) Disconnect the I144 DCM (telematics transceiver) connector.

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

(d) Disconnect the N4 and M4 rear speaker assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I71-1 (FR+) or I144-1 (SPI+) - Body ground

Always

10 kΩ or higher

I71-6 (FR-) or I144-2 (SPI-) - Body ground

Always

10 kΩ or higher

I71-2 (FL+) or I77-4 (TWL+) - Body ground

Always

10 kΩ or higher

I71-7 (FL-) or I77-2 (TWL-) - Body ground

Always

10 kΩ or higher

I71-4 (RR+) or M4-2 - Body ground

Always

10 kΩ or higher

I71-9 (RR-) or M4-1 - Body ground

Always

10 kΩ or higher

I71-3 (RL+) or N4-2 - Body ground

Always

10 kΩ or higher

I71-8 (RL-) or N4-1 - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

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

(a) Disconnect the I144 DCM (telematics transceiver) connector.

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I144-3 (SPO+) or I76-4 (TWR+) - Body ground

Always

10 kΩ or higher

I144-4 (SPO-) or I76-2 (TWR-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

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

(a) Disconnect the K1 and L1 front No. 1 speaker assembly connectors.

(b) Disconnect the I76 and I77 front No. 2 speaker assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

L1-2 or I77-3 (+) - Body ground

Always

10 kΩ or higher

L1-1 or I77-1 (-) - Body ground

Always

10 kΩ or higher

K1-2 or I76-3 (+) - Body ground

Always

10 kΩ or higher

K1-1 or I76-1 (-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

5.

INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

Click here 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]; AUDIO / VIDEO: FRONT DOOR SPEAKER: INSPECTION

NG

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY

OK

6.

INSPECT REAR SPEAKER ASSEMBLY

Click here 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]; AUDIO / VIDEO: REAR DOOR SPEAKER: INSPECTION

NG

REPLACE REAR SPEAKER ASSEMBLY

OK

7.

INSPECT TELEMATICS TRANSCEIVER

(a) Disconnect the telematics transceiver connector.

*a

Component without harness connected

(DCM (Telematics Transceiver))

(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

NG

REPLACE DCM (TELEMATICS TRANSCEIVER)

OK

8.

REPLACE FRONT NO.2 SPEAKER ASSEMBLY

(a) Replace the speaker assembly with a new or known good one.

Click here 2019 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 -        ]; AUDIO / VIDEO: PILLAR SPEAKER: REMOVAL

NEXT

9.

CHECK FOR DTC

(a) Clear the DTCs.

Body Electrical > Navigation System > Clear DTCs

(b) Turn the ignition switch off.

(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 B15C371 is output

B

A

END

B

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

10.

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

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

(b) Disconnect the I144 DCM (telematics transceiver) connector.

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I71-1 (FR+) or I144-1 (SPI+) - Body ground

Always

10 kΩ or higher

I71-6 (FR-) or I144-2 (SPI-) - Body ground

Always

10 kΩ or higher

I71-2 (FL+) or L1-2 - Body ground

Always

10 kΩ or higher

I71-7 (FL-) or L1-1 - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

11.

CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - FRONT NO. 1 SPEAKER ASSEMBLY RH)

(a) Disconnect the I144 DCM (telematics transceiver) connector.

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I144-3 (SPO+) or K1-2 - Body ground

Always

10 kΩ or higher

I144-4 (SPO-) or K1-1 - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

12.

INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

Click here 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]; AUDIO / VIDEO: FRONT DOOR SPEAKER: INSPECTION

NG

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY

OK

13.

INSPECT TELEMATICS TRANSCEIVER

(a) Disconnect the telematics transceiver connector.

*a

Component without harness connected

(DCM (Telematics Transceiver))

(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

OK

END

NG

REPLACE DCM (TELEMATICS TRANSCEIVER)

14.

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

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

(b) Disconnect the I76 and I77 front No. 2 speaker assembly connectors.

(c) Disconnect the N4 and M4 rear speaker assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I71-1 (FR+) or I76-4 (TWR+) - Body ground

Always

10 kΩ or higher

I71-6 (FR-) or I76-2 (TWR-) - Body ground

Always

10 kΩ or higher

I71-2 (FL+) or I77-4 (TWL+) - Body ground

Always

10 kΩ or higher

I71-7 (FL-) or I77-2 (TWL-) - Body ground

Always

10 kΩ or higher

I71-4 (RR+) or M4-2 - Body ground

Always

10 kΩ or higher

I71-9 (RR-) or M4-1 - Body ground

Always

10 kΩ or higher

I71-3 (RL+) or N4-2 - Body ground

Always

10 kΩ or higher

I71-8 (RL-) or N4-1 - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

15.

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

(a) Disconnect the K1 and L1 front No. 1 speaker assembly connectors.

(b) Disconnect the I76 and I77 front No. 2 speaker assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

K1-2 or I76-3 (+) - Body ground

Always

10 kΩ or higher

K1-1 or I76-1 (-) - Body ground

Always

10 kΩ or higher

L1-2 or I77-3 (+) - Body ground

Always

10 kΩ or higher

L1-1 or I77-1 (-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

16.

INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

Click here 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]; AUDIO / VIDEO: FRONT DOOR SPEAKER: INSPECTION

NG

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY

OK

17.

INSPECT REAR SPEAKER ASSEMBLY

Click here 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]; AUDIO / VIDEO: REAR DOOR SPEAKER: INSPECTION

NG

REPLACE REAR SPEAKER ASSEMBLY

OK

18.

REPLACE FRONT NO.2 SPEAKER ASSEMBLY

(a) Replace the speaker assembly with a new or known good one.

Click here 2019 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 -        ]; AUDIO / VIDEO: PILLAR SPEAKER: REMOVAL

NEXT

19.

CHECK FOR DTC

(a) Clear the DTCs.

Body Electrical > Navigation System > Clear DTCs

(b) Turn the ignition switch off.

(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 B15C371 is output

B

A

END

B

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

20.

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

(a) Disconnect the I54 stereo component amplifier assembly connector.

(b) Disconnect the I144 DCM (telematics transceiver) connector.

(c) Disconnect the I7 front No. 2 speaker assembly LH connector.

(d) Disconnect the I74 and I75 front No. 3 speaker assembly connectors.

(e) Disconnect the M4 and N4 rear speaker assembly connectors.

(f) Disconnect the O71 rear No. 2 speaker assembly connector.*

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

  • *: for Sedan Model

Standard Resistance:

Tester Connection

Condition

Specified Condition

I54-14 (TWR+) or I144-1 (SPI+) - Body ground

Always

10 kΩ or higher

I54-29 (TWR-) or I144-2 (SPI-) - Body ground

Always

10 kΩ or higher

I54-12 (TWL+) or I7-2 - Body ground

Always

10 kΩ or higher

I54-27 (TWL-) or I7-1 - Body ground

Always

10 kΩ or higher

I54-15 (FR+) or I74-4 (+TW) - Body ground

Always

10 kΩ or higher

I54-30 (FR-) or I74-2 (-TW) - Body ground

Always

10 kΩ or higher

I54-13 (FL+) or I75-4 (+TW) - Body ground

Always

10 kΩ or higher

I54-28 (FL-) or I75-2 (-TW) - Body ground

Always

10 kΩ or higher

I54-11 (RR+) or M4-2 - Body ground

Always

10 kΩ or higher

I54-26 (RR-) or M4-1 - Body ground

Always

10 kΩ or higher

I54-9 (RL+) or N4-2 - Body ground

Always

10 kΩ or higher

I54-24 (RL-) or N4-1 - Body ground

Always

10 kΩ or higher

I54-10 (WF1+) or O71-4 (WF1+) - Body ground

Always

10 kΩ or higher

I54-25 (WF1-) or O71-3 (WF1-) - Body ground

Always

10 kΩ or higher

I54-8 (WF2+) or O71-2 (WF2+) - Body ground

Always

10 kΩ or higher

I54-23 (WF2-) or O71-1 (WF2-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

21.

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

(a) Disconnect the I144 DCM (telematics transceiver) connector.

(b) Disconnect the I6 front No. 2 speaker assembly RH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I144-3 (SPO+) or I6-2 - Body ground

Always

10 kΩ or higher

I144-4 (SPO-) or I6-1 - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

22.

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

(a) Disconnect the K1 and L1 front No. 1 speaker assembly connectors.

(b) Disconnect the I74 and I75 front No. 3 speaker assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

L1-2 or I75-3 (+) - Body ground

Always

10 kΩ or higher

L1-1 or I75-1 (-) - Body ground

Always

10 kΩ or higher

K1-2 or I74-3 (+) - Body ground

Always

10 kΩ or higher

K1-1 or I74-1 (-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

23.

INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

Click here 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]; AUDIO / VIDEO: FRONT DOOR SPEAKER: INSPECTION

NG

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY

OK

24.

INSPECT FRONT NO. 2 SPEAKER ASSEMBLY

Click here 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]; AUDIO / VIDEO: FRONT DOOR SPEAKER: INSPECTION

NG

REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

OK

25.

INSPECT REAR SPEAKER ASSEMBLY

Click here 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]; AUDIO / VIDEO: REAR DOOR SPEAKER: INSPECTION

NG

REPLACE REAR SPEAKER ASSEMBLY

OK

26.

CHECK MODEL

(a) Choose the model to be inspected.

Result

Proceed to

Sedan

A

Hatchback

B

B

GO TO STEP 28

A

27.

INSPECT REAR NO.2 SPEAKER ASSEMBLY (for Sedan Model)

Click here 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]; AUDIO / VIDEO: REAR PACKAGE TRAY SPEAKER: INSPECTION

NG

REPLACE REAR NO.2 SPEAKER ASSEMBLY (for Sedan Model)

OK

28.

INSPECT DCM (TELEMATICS TRANSCEIVER)

(a) Remove the DCM (telematics transceiver).

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; CELLULAR COMMUNICATION: DCM(TELEMATICS TRANSCEIVER): REMOVAL

(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

1 (SPI+) or 3 (SPO+) - Body ground

Always

10 kΩ or higher

2 (SPI-) or 4 (SPO-) - Body ground

Always

10 kΩ or higher

*a

Component without harness connected

(DCM (Telematics Transceiver))

NG

REPLACE DCM (TELEMATICS TRANSCEIVER)

OK

29.

REPLACE FRONT NO.3 SPEAKER ASSEMBLY

(a) Replace the speaker assembly with a new or known good one.

Click here 2019 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 -        ]; AUDIO / VIDEO: PILLAR SPEAKER: REMOVAL

NEXT

30.

CHECK FOR DTC

(a) Clear the DTCs.

Body Electrical > Navigation System > Clear DTCs

(b) Turn the ignition switch off.

(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 B15C371 is output

B

A

END

B

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY