Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Speaker Output Short (B15C3)

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual / Audio & Visual & Telematics / Audio / Video / Audio And Visual System (for 8 Inch Display) / 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
  • Stereo component amplifier assembly
  • DCM (telematics transceiver)*
  • *: w/ Manual (SOS) Switch

WIRING DIAGRAM

for 9 Speakers for 12 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

  • 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 9 Speakers (w/ Manual (SOS) Switch)

A

for 9 Speakers (w/o Manual (SOS) Switch)

B

for 12 Speakers (w/ Manual (SOS) Switch)

C

for 12 Speakers (w/o Manual (SOS) Switch)

D
B

GO TO STEP 5

C

GO TO STEP 12

D

GO TO STEP 15

A

2.

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

(a) Disconnect the J66 stereo component amplifier assembly connector.

(b) Disconnect the J155 DCM (telematics transceiver) connector.

(c) Disconnect the K6 and K8 front No. 2 speaker assembly connectors.

(d) Disconnect the M3 and N3 front No. 1 speaker assembly connectors.

(e) Disconnect the O5 and P5 rear No. 2 speaker assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J66-7 (CTR+) or J155-1 (SPI+) - Body ground

Always

10 kΩ or higher

J66-22 (CTR-) or J155-2 (SPI-) - Body ground

Always

10 kΩ or higher

J66-13 (FR+) or K6-4 - Body ground

Always

10 kΩ or higher

J66-28 (FR-) or K6-2 - Body ground

Always

10 kΩ or higher

J66-12 (FL+) or K8-4 - Body ground

Always

10 kΩ or higher

J66-27 (FL-) or K8-2 - Body ground

Always

10 kΩ or higher

J66-5 (WFR+) or M3-1 - Body ground

Always

10 kΩ or higher

J66-20 (WFR-) or M3-2 - Body ground

Always

10 kΩ or higher

J66-4 (WFL+) or N3-1 - Body ground

Always

10 kΩ or higher

J66-19 (WFL-) or N3-2 - Body ground

Always

10 kΩ or higher

J66-9 (RR+) or O5-4 (+TW) - Body ground

Always

10 kΩ or higher

J66-24 (RR-) or O5-2 (-TW) - Body ground

Always

10 kΩ or higher

J66-8 (RL+) or P5-4 (+TW) - Body ground

Always

10 kΩ or higher

J66-23 (RL-) or P5-2 (-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 NO. 3 FRONT SPEAKER ASSEMBLY- BODY GROUND)

(a) Disconnect the J155 DCM (telematics transceiver) connector.

(b) Disconnect the K2 front 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

K2-2 or J155-3 (SPO+) - Body ground

Always

10 kΩ or higher

K2-1 or J155-4 (SPO-) - 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

1 (SPI+) - 3 (SPO+)

Always

Below 1 Ω

2 (SPI-) - 4 (SPO-)

Always

Below 1 Ω

1 (SPI+) - 2 (SPI-)

Always

10 kΩ or higher

3 (SPO+) - 4 (SPO-)

Always

10 kΩ or higher

1 (SPI+) or 3 (SPO+) - Body ground

Always

10 kΩ or higher

2 (SPI-) or 4 (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 J66 stereo component amplifier assembly connector.

(b) Disconnect the K2 front No. 3 speaker assembly connector.

(c) Disconnect the K6 and K8 front No. 2 speaker assembly connectors.

(d) Disconnect the M3 and N3 front No. 1 speaker assembly connectors.

(e) Disconnect the O5 and P5 rear No. 2 speaker assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J66-7 (CTR+) or K2-2 - Body ground

Always

10 kΩ or higher

J66-22 (CTR-) or K2-1 - Body ground

Always

10 kΩ or higher

J66-13 (FR+) or K6-4 - Body ground

Always

10 kΩ or higher

J66-28 (FR-) or K6-2 - Body ground

Always

10 kΩ or higher

J66-12 (FL+) or K8-4 - Body ground

Always

10 kΩ or higher

J66-27 (FL-) or K8-2 - Body ground

Always

10 kΩ or higher

J66-5 (WFR+) or M3-1 - Body ground

Always

10 kΩ or higher

J66-20 (WFR-) or M3-2 - Body ground

Always

10 kΩ or higher

J66-4 (WFL+) or N3-1 - Body ground

Always

10 kΩ or higher

J66-19 (WFL-) or N3-2 - Body ground

Always

10 kΩ or higher

J66-9 (RR+) or O5-4 (+TW) - Body ground

Always

10 kΩ or higher

J66-24 (RR-) or O5-2 (-TW) - Body ground

Always

10 kΩ or higher

J66-8 (RL+) or P5-4 (+TW) - Body ground

Always

10 kΩ or higher

J66-23 (RL-) or P5-2 (-TW) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

6.

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

(a) Disconnect the O2 and P2 rear speaker assembly connectors.

(b) Disconnect the O5 and P5 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

O2-1 or O5-3 (+) - Body ground

Always

10 kΩ or higher

O2-2 or O5-1 (-) - Body ground

Always

10 kΩ or higher

P2-1 or P5-3 (+) - Body ground

Always

10 kΩ or higher

P2-2 or P5-1 (-) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

7.

INSPECT 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

NG

REPLACE FRONT NO. 3 SPEAKER ASSEMBLY

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.

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

(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 STEREO COMPONENT AMPLIFIER ASSEMBLY

12.

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

(a) Disconnect the J66 stereo component amplifier assembly connector.

(b) Disconnect the J155 DCM (telematics transceiver) connector.

(c) Disconnect the K5 and K7 front No. 2 speaker assembly connectors.

(d) Disconnect the M3 and N3 front No. 1 speaker assembly connectors.

(e) Disconnect the O5 and P5 rear No. 2 speaker assembly connectors.

(f) Disconnect the S53 rear No. 3 speaker assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J66-7 (CTR+) or J155-1 (SPI+) - Body ground

Always

10 kΩ or higher

J66-22 (CTR-) or J155-2 (SPI-) - Body ground

Always

10 kΩ or higher

J66-13 (FR+) or K5-2 - Body ground

Always

10 kΩ or higher

J66-28 (FR-) or K5-1 - Body ground

Always

10 kΩ or higher

J66-12 (FL+) or K7-2 - Body ground

Always

10 kΩ or higher

J66-27 (FL-) or K7-1 - Body ground

Always

10 kΩ or higher

J66-5 (WFR+) or M3-1 - Body ground

Always

10 kΩ or higher

J66-20 (WFR-) or M3-2 - Body ground

Always

10 kΩ or higher

J66-4 (WFL+) or N3-1 - Body ground

Always

10 kΩ or higher

J66-19 (WFL-) or N3-2 - Body ground

Always

10 kΩ or higher

J66-9 (RR+) or O5-4 (+TW) - Body ground

Always

10 kΩ or higher

J66-24 (RR-) or O5-2 (-TW) - Body ground

Always

10 kΩ or higher

J66-8 (RL+) or P5-4 (+TW) - Body ground

Always

10 kΩ or higher

J66-23 (RL-) or P5-2 (-TW) - Body ground

Always

10 kΩ or higher

J66-6 (WF1+) or S53-1 - Body ground

Always

10 kΩ or higher

J66-21 (WF1-) or S53-2 - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

13.

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

(a) Disconnect the J155 DCM (telematics transceiver) connector.

(b) Disconnect the K2 front 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

K2-2 or J155-3 (SPO+) - Body ground

Always

10 kΩ or higher

K2-1 or J155-4 (SPO-) - 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

1 (SPI+) - 3 (SPO+)

Always

Below 1 Ω

2 (SPI-) - 4 (SPO-)

Always

Below 1 Ω

1 (SPI+) - 2 (SPI-)

Always

10 kΩ or higher

3 (SPO+) - 4 (SPO-)

Always

10 kΩ or higher

1 (SPI+) or 3 (SPO+) - Body ground

Always

10 kΩ or higher

2 (SPI-) or 4 (SPO-) - Body ground

Always

10 kΩ or higher

*a

Component without harness connected

(DCM (Telematics Transceiver))
OK

GO TO STEP 16

NG

REPLACE DCM (TELEMATICS TRANSCEIVER)

15.

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

(a) Disconnect the J66 stereo component amplifier assembly connector.

(b) Disconnect the K2 front No. 3 speaker assembly connector.

(c) Disconnect the K5 and K7 front No. 2 speaker assembly connectors.

(d) Disconnect the M3 and N3 front No. 1 speaker assembly connectors.

(e) Disconnect the O5 and P5 rear No. 2 speaker assembly connectors.

(f) Disconnect the S53 rear No. 3 speaker assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J66-7 (CTR+) or K2-2 - Body ground

Always

10 kΩ or higher

J66-22 (CTR-) or K2-1 - Body ground

Always

10 kΩ or higher

J66-13 (FR+) or K5-2 - Body ground

Always

10 kΩ or higher

J66-28 (FR-) or K5-1 - Body ground

Always

10 kΩ or higher

J66-12 (FL+) or K7-2 - Body ground

Always

10 kΩ or higher

J66-27 (FL-) or K7-1 - Body ground

Always

10 kΩ or higher

J66-5 (WFR+) or M3-1 - Body ground

Always

10 kΩ or higher

J66-20 (WFR-) or M3-2 - Body ground

Always

10 kΩ or higher

J66-4 (WFL+) or N3-1 - Body ground

Always

10 kΩ or higher

J66-19 (WFL-) or N3-2 - Body ground

Always

10 kΩ or higher

J66-9 (RR+) or O5-4 (+TW) - Body ground

Always

10 kΩ or higher

J66-24 (RR-) or O5-2 (-TW) - Body ground

Always

10 kΩ or higher

J66-8 (RL+) or P5-4 (+TW) - Body ground

Always

10 kΩ or higher

J66-23 (RL-) or P5-2 (-TW) - Body ground

Always

10 kΩ or higher

J66-6 (WF1+) or S53-1 - Body ground

Always

10 kΩ or higher

J66-21 (WF1-) or S53-2 - 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 O2 and P2 rear speaker assembly connectors.

(b) Disconnect the O5 and P5 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

O2-1 or O5-3 (+) - Body ground

Always

10 kΩ or higher

O2-2 or O5-1 (-) - Body ground

Always

10 kΩ or higher

P2-1 or P5-3 (+) - Body ground

Always

10 kΩ or higher

P2-2 or P5-1 (-) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

17.

INSPECT 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

NG

REPLACE FRONT NO. 3 SPEAKER ASSEMBLY

OK

18.

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

19.

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

20.

INSPECT REAR NO. 3 SPEAKER ASSEMBLY

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

w/o Rear No. 2 Seat: Click here

w/ Rear No. 2 Seat: Click here

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

w/o Rear No. 2 Seat: Click here

w/ Rear No. 2 Seat: Click here

NG

REPLACE REAR NO. 3 SPEAKER ASSEMBLY

OK

21.

INSPECT 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

22.

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

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY

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