Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001JR3K
Model Year Start: 2020 Model: Avalon Prod Date Range: [08/2019 - 08/2020]
Title: NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM (for Gasoline Model): B15C3; Speaker Output Short; 2020 MY Avalon [08/2019 - 08/2020]

DTC

B15C3

Speaker Output Short

DESCRIPTION

This DTC is stored when a malfunction occurs in the speakers.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B15C3

Speaker Output Short

A short is detected in the speaker output circuit

  • Harness or connector
  • Speaker
  • DCM (telematics transceiver)*
  • Stereo Component Amplifier
  • *: w/ Manual (SOS) Switch

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Navigation System.

    Click here 2019 - 2021 MY Avalon [04/2018 - 08/2021]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM (for Gasoline Model): PRECAUTION

  • When replacing the radio and display receiver assembly, always replace it with a new one. If a radio and display receiver assembly which was installed to another vehicle is used, the following may occur:
    • A communication malfunction DTC may be stored.
    • The radio and display receiver assembly may not operate normally.
  • Before replacing the DCM (telematics transceiver), refer to Registration.

    Click here 2019 - 2020 MY Avalon [04/2018 - 08/2020]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION

PROCEDURE

1.

CHECK MODEL

(a) Choose the model to be inspected.

Result

Proceed to

w/ Manual (SOS) Switch

A

w/o Manual (SOS) Switch

B

B

GO TO STEP 5

A

2.

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY, DCM (TELEMATICS TRANSCEIVER) OR SPEAKERS - BODY GROUND)

(a) Disconnect the G10 stereo component amplifier assembly connector.

(b) Disconnect the G9 DCM (telematics transceiver) connector.

(c) Disconnect the G70 and G71 front No. 2 speaker assembly connectors.

(d) Disconnect the G72 front No. 4 speaker assembly connector.

(e) Disconnect the G79 front No. 3 speaker assembly LH connector.

(f) Disconnect the J3 and J4 rear No. 2 speaker assembly connectors.

(g) Disconnect the K2 and K3 speaker assembly with bracket connectors.

(h) Disconnect the K1 rear No. 3 speaker assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G10-9 (TWR+) or G70-2 - Body ground

Always

10 kΩ or higher

G10-24 (TWR-) or G70-1 - Body ground

Always

10 kΩ or higher

G10-8 (TWL+) or G71-2 - Body ground

Always

10 kΩ or higher

G10-23 (TWL-) or G71-1 - Body ground

Always

10 kΩ or higher

G10-13 (FR+) or G9-2 (SPI+) - Body ground

Always

10 kΩ or higher

G10-28 (FR-) or G9-3 (SPI-) - Body ground

Always

10 kΩ or higher

G10-12 (FL+) or G79-4 (+TW) - Body ground

Always

10 kΩ or higher

G10-27 (FL-) or G79-2 (-TW) - Body ground

Always

10 kΩ or higher

G10-15 (RR+) or J3-4 (+TW) - Body ground

Always

10 kΩ or higher

G10-30 (RR-) or J3-2 (-TW) - Body ground

Always

10 kΩ or higher

G10-14 (RL+) or J4-4 (+TW) - Body ground

Always

10 kΩ or higher

G10-29 (RL-) or J4-2 (-TW) - Body ground

Always

10 kΩ or higher

G10-6 (WF1+) or K1-4 (WF1+) - Body ground

Always

10 kΩ or higher

G10-21 (WF1-) or K1-3 (WF1-) - Body ground

Always

10 kΩ or higher

G10-5 (WF2+) or K1-2 (WF2+) - Body ground

Always

10 kΩ or higher

G10-20 (WF2-) or K1-1 (WF2-) - Body ground

Always

10 kΩ or higher

G10-7 (CTR+) or G72-2 - Body ground

Always

10 kΩ or higher

G10-22 (CTR-) or G72-1 - Body ground

Always

10 kΩ or higher

G10-11 (SR+) or K2-2 - Body ground

Always

10 kΩ or higher

G10-26 (SR-) or K2-1 - Body ground

Always

10 kΩ or higher

G10-10 (SL+) or K3-2 - Body ground

Always

10 kΩ or higher

G10-25 (SL-) or K3-1 - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) OR SPEAKER - BODY GROUND)

(a) Disconnect the G9 DCM (telematics transceiver) connector.

(b) Disconnect the G78 front No. 3 speaker assembly RH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G9-5 (SPO+) or G78-4 (+TW) - Body ground

Always

10 kΩ or higher

G9-6 (SPO-) or G78-2 (-TW) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

INSPECT DCM (TELEMATICS TRANSCEIVER)

(a) Remove the DCM (telematics transceiver).

Click here 2019 - 2020 MY Avalon Avalon HV [04/2018 - 08/2020]; 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

2 (SPI+) - 5 (SPO+)

Always

Below 1 Ω

3 (SPI-) - 6 (SPO-)

Always

Below 1 Ω

2 (SPI+) - 3 (SPI-)

Always

10 kΩ or higher

5 (SPO+) - 6 (SPO-)

Always

10 kΩ or higher

2 (SPI+) or 5 (SPO+) - Body ground

Always

10 kΩ or higher

3 (SPI-) or 6 (SPO-) - Body ground

Always

10 kΩ or higher

*a

Component without harness connected

(DCM (Telematics Transceiver))

OK

GO TO STEP 6

NG

REPLACE DCM (TELEMATICS TRANSCEIVER)

5.

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY OR SPEAKERS - BODY GROUND)

(a) Disconnect the G10 stereo component amplifier assembly connector.

(b) Disconnect the G78 and G79 front No. 3 speaker assembly connectors.

(c) Disconnect the G70 and G71 front No. 2 speaker assembly connectors.

(d) Disconnect the J3 and J4 rear No. 2 speaker assembly connectors.

(e) Disconnect the K2 and K3 speaker assembly with bracket connectors.

(f) Disconnect the K1 rear No. 3 speaker assembly connector.

(g) Disconnect the G72 front No. 4 speaker assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G10-13 (FR+) or G78-4 (+TW) - Body ground

Always

10 kΩ or higher

G10-28 (FR-) or G78-2 (-TW) - Body ground

Always

10 kΩ or higher

G10-12 (FL+) or G79-4 (+TW) - Body ground

Always

10 kΩ or higher

G10-27 (FL-) or G79-2 (-TW) - Body ground

Always

10 kΩ or higher

G10-9 (TWR+) or G70-2 - Body ground

Always

10 kΩ or higher

G10-24 (TWR-) or G70-1 - Body ground

Always

10 kΩ or higher

G10-8 (TWL+) or G71-2 - Body ground

Always

10 kΩ or higher

G10-23 (TWL-) or G71-1 - Body ground

Always

10 kΩ or higher

G10-15 (RR+) or J3-4 (+TW) - Body ground

Always

10 kΩ or higher

G10-30 (RR-) or J3-2 (-TW) - Body ground

Always

10 kΩ or higher

G10-14 (RL+) or J4-4 (+TW) - Body ground

Always

10 kΩ or higher

G10-29 (RL-) or J4-2 (-TW) - Body ground

Always

10 kΩ or higher

G10-6 (WF1+) or K1-4 (WF1+) - Body ground

Always

10 kΩ or higher

G10-21 (WF1-) or K1-3 (WF1-) - Body ground

Always

10 kΩ or higher

G10-5 (WF2+) or K1-2 (WF2+) - Body ground

Always

10 kΩ or higher

G10-20 (WF2-) or K1-1 (WF2-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

6.

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

(a) Disconnect the I1 and I15 front No. 1 speaker assembly connectors.

(b) Disconnect the G78 and G79 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

I1-2 or G78-3 (+) - Body ground

Always

10 kΩ or higher

I1-1 or G78-1 (-) - Body ground

Always

10 kΩ or higher

I15-2 or G79-3 (+) - Body ground

Always

10 kΩ or higher

I15-1 or G79-1 (-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

7.

CHECK HARNESS AND CONNECTOR (REAR SPEAKER ASSEMBLY OR REAR NO. 2 SPEAKER ASSEMBLY - BODY GROUND)

(a) Disconnect the J3 and J4 rear No. 2 speaker assembly connectors.

(b) Disconnect the J11 and J12 rear speaker assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J11-2 or J3-3 (+) - Body ground

Always

10 kΩ or higher

J11-1 or J3-1 (-) - Body ground

Always

10 kΩ or higher

J12-2 or J4-3 (+) - Body ground

Always

10 kΩ or higher

J12-1 or J4-1 (-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

8.

INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

(a) Remove the front No. 1 speaker assembly.

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; AUDIO / VIDEO: FRONT DOOR SPEAKER: REMOVAL

(b) Inspect the front No. 1 speaker assembly.

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; AUDIO / VIDEO: FRONT DOOR SPEAKER: INSPECTION

NG

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY

OK

9.

INSPECT FRONT NO. 2 SPEAKER ASSEMBLY

(a) Remove the front No. 2 speaker assembly.

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; AUDIO / VIDEO: INSTRUMENT PANEL SPEAKER: REMOVAL

(b) Inspect the front No. 2 speaker assembly.

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; AUDIO / VIDEO: INSTRUMENT PANEL SPEAKER: INSPECTION

NG

REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

OK

10.

INSPECT FRONT NO. 4 SPEAKER ASSEMBLY

(a) Remove the front No. 4 speaker assembly.

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; AUDIO / VIDEO: INSTRUMENT PANEL SPEAKER: REMOVAL

(b) Inspect the front No. 4 speaker assembly.

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; AUDIO / VIDEO: INSTRUMENT PANEL SPEAKER: INSPECTION

NG

REPLACE FRONT NO. 4 SPEAKER ASSEMBLY

OK

11.

INSPECT REAR SPEAKER ASSEMBLY

(a) Remove the rear speaker assembly.

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; AUDIO / VIDEO: REAR DOOR SPEAKER: REMOVAL

(b) Inspect the rear speaker assembly.

Click here 2020 - 2022 MY Avalon Avalon HV [08/2019 -        ]; AUDIO / VIDEO: REAR DOOR SPEAKER: INSPECTION

NG

REPLACE REAR SPEAKER ASSEMBLY

OK

12.

INSPECT REAR NO. 3 SPEAKER ASSEMBLY

(a) Remove the rear No. 3 speaker assembly.

Click here 2019 - 2021 MY Avalon Avalon HV [04/2018 - 08/2021]; AUDIO / VIDEO: REAR PACKAGE TRAY SPEAKER: REMOVAL

(b) Inspect the rear No. 3 speaker assembly.

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; AUDIO / VIDEO: REAR PACKAGE TRAY SPEAKER: INSPECTION

NG

REPLACE REAR NO. 3 SPEAKER ASSEMBLY

OK

13.

INSPECT SPEAKER ASSEMBLY WITH BRACKET

(a) Remove the speaker assembly with bracket.

Click here 2019 - 2021 MY Avalon Avalon HV [04/2018 - 08/2021]; AUDIO / VIDEO: REAR PACKAGE TRAY SPEAKER: REMOVAL

(b) Inspect the speaker assembly with bracket.

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; AUDIO / VIDEO: REAR PACKAGE TRAY SPEAKER: INSPECTION

NG

REPLACE SPEAKER ASSEMBLY WITH BRACKET

OK

14.

REPLACE FRONT NO. 3 SPEAKER ASSEMBLY

(a) Remove the front No. 3 speaker assembly.

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; AUDIO / VIDEO: PILLAR SPEAKER: REMOVAL

(b) Inspect the front No. 3 speaker assembly.

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; AUDIO / VIDEO: PILLAR SPEAKER: INSPECTION

(c) Clear the DTCs.

Body Electrical > Navigation System > Clear DTCs

(d) Recheck for DTCs and check that no DTCs are output.

Body Electrical > Navigation System > Trouble Codes

OK:

No DTCs are output.

OK

END

NG

15.

REPLACE REAR NO. 2 SPEAKER ASSEMBLY

(a) Remove the rear No. 2 speaker assembly.

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; AUDIO / VIDEO: REAR DOOR SPEAKER: REMOVAL

(b) Inspect the rear No. 2 speaker assembly.

Click here 2020 - 2022 MY Avalon Avalon HV [08/2019 -        ]; AUDIO / VIDEO: REAR DOOR SPEAKER: INSPECTION

(c) Clear the DTCs.

Body Electrical > Navigation System > Clear DTCs

(d) Recheck for DTCs and check that no DTCs are output.

Body Electrical > Navigation System > Trouble Codes

OK:

No DTCs are output.

OK

END

NG

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY