Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001JR3I
Model Year Start: 2020 Model: Avalon HV Prod Date Range: [08/2019 - 08/2020]
Title: NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM (for HV Model): Speaker Circuit; 2020 MY Avalon HV [08/2019 - 08/2020]

Speaker Circuit

DESCRIPTION

If there is a short in a speaker circuit, the stereo component amplifier assembly detects it and stops output to the speakers.

Thus sound cannot be heard from the speakers even if there is no malfunction in the stereo component amplifier assembly, DCM (telematics transceiver) or speakers.

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 HV [04/2018 - 08/2021]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM (for HV Model): PRECAUTION

  • Before replacing the DCM (telematics transceiver), refer to Registration.

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

PROCEDURE

1.

CHECK SPEAKER (OPERATION CHECK)

(a) Enter the "System Check Mode" screen. Refer to Check Speaker in Operation Check.

Click here 2019 - 2020 MY Avalon HV [04/2018 - 08/2020]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM (for HV Model): OPERATION CHECK

(b) Perform the operation check above and determine the speaker that is not operating.

Not Operating Speaker

Proceed to

Front No. 1 speaker assembly or front No. 3 speaker assembly

A

Front No. 2 speaker assembly

B

Front No. 4 speaker assembly

C

Rear speaker assembly or rear No. 2 speaker assembly

D

Speaker assembly with bracket

E

Rear No. 3 speaker assembly

F

HINT:

If sound cannot be heard from any speaker, inspect all of them.

B

GO TO STEP 6

C

GO TO STEP 8

D

GO TO STEP 10

E

GO TO STEP 13

F

GO TO STEP 15

A

2.

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - FRONT NO. 1 SPEAKER ASSEMBLY - FRONT NO. 3 SPEAKER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER))

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

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

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

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G10-13 (FR+) - G9-2 (SPI+)

Always

Below 1 Ω

G10-28 (FR-) - G9-3 (SPI-)

Always

Below 1 Ω

G9-5 (SPO+) - G78-4 (+TW)

Always

Below 1 Ω

G9-6 (SPO-) - G78-2 (-TW)

Always

Below 1 Ω

G10-12 (FL+) - G79-4 (+TW)

Always

Below 1 Ω

G10-27 (FL-) - G79-2 (-TW)

Always

Below 1 Ω

I1-2 - G78-3 (+)

Always

Below 1 Ω

I1-1 - G78-1 (-)

Always

Below 1 Ω

I15-2 - G79-3 (+)

Always

Below 1 Ω

I15-1 - G79-1 (-)

Always

Below 1 Ω

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

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

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

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

3.

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

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))

NG

REPLACE DCM (TELEMATICS TRANSCEIVER)

OK

5.

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

OK:

Malfunction disappears.

OK

END

NG

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

6.

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

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

(b) Disconnect the G70 and G71 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

G10-9 (TWR+) - G70-2

Always

Below 1 Ω

G10-24 (TWR-) - G70-1

Always

Below 1 Ω

G10-8 (TWL+) - G71-2

Always

Below 1 Ω

G10-23 (TWL-) - G71-1

Always

Below 1 Ω

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

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

7.

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

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

8.

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - FRONT NO. 4 SPEAKER ASSEMBLY)

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

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G10-7 (CTR+) - G72-2

Always

Below 1 Ω

G10-22 (CTR-) - G72-1

Always

Below 1 Ω

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

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

9.

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

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPLACE FRONT NO. 4 SPEAKER ASSEMBLY

10.

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - REAR SPEAKER ASSEMBLY - REAR NO. 2 SPEAKER ASSEMBLY)

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

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

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G10-15 (RR+) - J3-4 (+TW)

Always

Below 1 Ω

G10-30 (RR-) - J3-2 (-TW)

Always

Below 1 Ω

G10-14 (RL+) - J4-4 (+TW)

Always

Below 1 Ω

G10-29 (RL-) - J4-2 (-TW)

Always

Below 1 Ω

J11-2 - J3-3 (+)

Always

Below 1 Ω

J11-1 - J3-1 (-)

Always

Below 1 Ω

J12-2 - J4-3 (+)

Always

Below 1 Ω

J12-1 - J4-1 (-)

Always

Below 1 Ω

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

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

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.

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

OK:

Malfunction disappears.

OK

END

NG

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

13.

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - SPEAKER ASSEMBLY WITH BRACKET)

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

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G10-11 (SR+) - K2-2

Always

Below 1 Ω

G10-26 (SR-) - K2-1

Always

Below 1 Ω

G10-10 (SL+) - K3-2

Always

Below 1 Ω

G10-25 (SL-) - K3-1

Always

Below 1 Ω

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

14.

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

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPLACE SPEAKER ASSEMBLY WITH BRACKET

15.

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - REAR NO. 3 SPEAKER ASSEMBLY)

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

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G10-6 (WF1+) - K1-4 (WF1+)

Always

Below 1 Ω

G10-21 (WF1-) - K1-3 (WF1-)

Always

Below 1 Ω

G10-5 (WF2+) - K1-2 (WF2+)

Always

Below 1 Ω

G10-20 (WF2-) - K1-1 (WF2-)

Always

Below 1 Ω

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

16.

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

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPLACE REAR NO. 3 SPEAKER ASSEMBLY