Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Speaker Output Short (B15C3)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Audio, Visual, Telematics / Audio / Video / Audio And Visual System(for Gasoline Model) / 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
  • Radio and display receiver assembly*1
  • Stereo Component Amplifier*2
  • DCM (telematics transceiver)*3
  • *1: for 8 Speakers
  • *2: for 14 Speakers
  • *3: w/ Manual (SOS) Switch

WIRING DIAGRAM

for 8 Speakers for 14 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. Refer to Precaution for Audio and Visual 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 is 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

for 8 Speakers (w/ Manual (SOS) Switch)

A

for 8 Speakers (w/o Manual (SOS) Switch)

B

for 14 Speakers

C
B

GO TO STEP 5

C

GO TO STEP 12

A

2.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY, DCM (TELEMATICS TRANSCEIVER) OR SPEAKERS - BODY GROUND)

(a) Disconnect the G14 radio and display receiver assembly connector.

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

(c) Disconnect the G7 front No. 2 speaker assembly LH connector.

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G14-1 (FR+) or G9-2 (SPI+) - Body ground

Always

10 kΩ or higher

G14-6 (FR-) or G9-3 (SPI-) - Body ground

Always

10 kΩ or higher

G14-2 (FL+) or G7-4 (+TW) - Body ground

Always

10 kΩ or higher

G14-7 (FL-) or G7-2 (-TW) - Body ground

Always

10 kΩ or higher

G14-4 (RR+) or J3-4 (+TW) - Body ground

Always

10 kΩ or higher

G14-9 (RR-) or J3-2 (-TW) - Body ground

Always

10 kΩ or higher

G14-3 (RL+) or J4-4 (+TW) - Body ground

Always

10 kΩ or higher

G14-8 (RL-) or J4-2 (-TW) - 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 G6 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

G9-5 (SPO+) or G6-4 (+TW) - Body ground

Always

10 kΩ or higher

G9-6 (SPO-) or G6-2 (-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 (RADIO AND DISPLAY RECEIVER ASSEMBLY OR SPEAKERS - BODY GROUND)

(a) Disconnect the G14 radio and display receiver assembly connector.

(b) Disconnect the G6 and G7 front No. 2 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

G14-1 (FR+) or G6-4 (+TW) - Body ground

Always

10 kΩ or higher

G14-6 (FR-) or G6-2 (-TW) - Body ground

Always

10 kΩ or higher

G14-2 (FL+) or G7-4 (+TW) - Body ground

Always

10 kΩ or higher

G14-7 (FL-) or G7-2 (-TW) - Body ground

Always

10 kΩ or higher

G14-4 (RR+) or J3-4 (+TW) - Body ground

Always

10 kΩ or higher

G14-9 (RR-) or J3-2 (-TW) - Body ground

Always

10 kΩ or higher

G14-3 (RL+) or J4-4 (+TW) - Body ground

Always

10 kΩ or higher

G14-8 (RL-) or J4-2 (-TW) - 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. 2 SPEAKER ASSEMBLY - BODY GROUND)

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

(b) Disconnect the G6 and G7 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

I1-2 or G6-3 (+) - Body ground

Always

10 kΩ or higher

I1-1 or G6-1 (-) - Body ground

Always

10 kΩ or higher

I15-2 or G7-3 (+) - Body ground

Always

10 kΩ or higher

I15-1 or G7-1 (-) - 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 J1 and J2 rear speaker assembly connectors.

(b) Disconnect the J3 and J4 rear 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

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 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

10.

REPLACE 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

(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

11.

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 RADIO AND DISPLAY RECEIVER ASSEMBLY

12.

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

13.

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

14.

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

15.

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

16.

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

(a) Disconnect the J1 and J2 rear speaker assembly connectors.

(b) Disconnect the J3 and J4 rear 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

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

17.

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

18.

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

19.

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

20.

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

21.

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

22.

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

23.

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

24.

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

    GPS Antenna Connection Malfunction(short) (B15C0,B15C1)

    Stereo Component Amplifier Disconnected (B15D3)

    See More:

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