Toyota Avalon Service & Repair Manual: 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.

  • *: 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

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

    Click here

PROCEDURE

1.

CHECK SPEAKER (OPERATION CHECK)

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

Click here

(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

(w/ Manual (SOS) Switch)

A

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

(w/o Manual (SOS) Switch)

B

Front No. 2 speaker assembly

C

Front No. 4 speaker assembly

D

Rear speaker assembly or rear No. 2 speaker assembly

E

Speaker assembly with bracket

F

Rear No. 3 speaker assembly

G

HINT:

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

B

GO TO STEP 6

C

GO TO STEP 9

D

GO TO STEP 11

E

GO TO STEP 13

F

GO TO STEP 16

G

GO TO STEP 18

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

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

Click here

NG

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY

OK

4.

INSPECT DCM (TELEMATICS TRANSCEIVER)

(a) Remove the DCM (telematics transceiver).

Click here

(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

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

Click here

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. 1 SPEAKER ASSEMBLY - FRONT NO. 3 SPEAKER ASSEMBLY)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G10-13 (FR+) - G78-4 (+TW)

Always

Below 1 Ω

G10-28 (FR-) - 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 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

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.

INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

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

Click here

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

Click here

NG

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY

OK

8.

REPLACE FRONT NO. 3 SPEAKER ASSEMBLY

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

Click here

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

Click here

OK:

Malfunction disappears.

OK

END

NG

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

9.

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

10.

INSPECT FRONT NO. 2 SPEAKER ASSEMBLY

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

Click here

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

Click here

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

11.

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

12.

INSPECT FRONT NO. 4 SPEAKER ASSEMBLY

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

Click here

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

Click here

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPLACE FRONT NO. 4 SPEAKER ASSEMBLY

13.

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 J1 and J2 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

J1-1 - J3-3 (+)

Always

Below 1 Ω

J1-2 - J3-1 (-)

Always

Below 1 Ω

J2-1 - J4-3 (+)

Always

Below 1 Ω

J2-2 - 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

J1-1 or J3-3 (+) - Body ground

Always

10 kΩ or higher

J1-2 or J3-1 (-) - Body ground

Always

10 kΩ or higher

J2-1 or J4-3 (+) - Body ground

Always

10 kΩ or higher

J2-2 or J4-1 (-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

14.

INSPECT REAR SPEAKER ASSEMBLY

(a) Remove the rear speaker assembly.

Click here

(b) Inspect the rear speaker assembly.

Click here

NG

REPLACE REAR SPEAKER ASSEMBLY

OK

15.

REPLACE REAR NO. 2 SPEAKER ASSEMBLY

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

Click here

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

Click here

OK:

Malfunction disappears.

OK

END

NG

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

16.

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

17.

INSPECT SPEAKER ASSEMBLY WITH BRACKET

(a) Remove the speaker assembly with bracket.

Click here

(b) Inspect the speaker assembly with bracket.

Click here

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPLACE SPEAKER ASSEMBLY WITH BRACKET

18.

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

19.

INSPECT REAR NO. 3 SPEAKER ASSEMBLY

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

Click here

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

Click here

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPLACE REAR NO. 3 SPEAKER ASSEMBLY

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