Toyota Avalon Service & Repair Manual: Speaker Output Short (B15C3)

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

  • 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

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

(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 J1 and J2 rear speaker assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

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

8.

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

9.

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

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

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

Click here

NG

REPLACE FRONT NO. 4 SPEAKER ASSEMBLY

OK

11.

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

12.

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

NG

REPLACE REAR NO. 3 SPEAKER ASSEMBLY

OK

13.

INSPECT SPEAKER ASSEMBLY WITH BRACKET

(a) Remove the speaker assembly with bracket.

Click here

(b) Inspect the speaker assembly with bracket.

Click here

NG

REPLACE SPEAKER ASSEMBLY WITH BRACKET

OK

14.

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

(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

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

Click here

(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

    Speed Signal Malfunction (B15C2)

    Stereo Component Amplifier Disconnected (B15D3)

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