Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: Speaker Output Short (B15C3)

Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual / Audio & Visual & Telematics / Audio / Video / Audio And Visual System (for 12.3 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

WIRING DIAGRAM

for 9 Speakers for 12 Speakers for 15 Speakers for 15 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

PROCEDURE

1.

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 (for 9 Speakers).

Disconnect the K5 and K7 front No. 2 speaker assembly connectors (except 9 Speakers).

(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 (except 9 Speakers).

(g) Disconnect the R25 and S38 quarter side speaker assembly connectors (for 15 Speakers).

(h) Measure the resistance between the stereo component amplifier assembly or the speakers and body ground to check for a short in the wire harness.

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*1

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

Always

10 kΩ or higher

J66-28 (FR-) or K6-2 - Body ground*1

J66-28 (FR-) or K5-1 - Body ground*2

Always

10 kΩ or higher

J66-12 (FL+) or K8-4 - Body ground*1

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

Always

10 kΩ or higher

J66-27 (FL-) or K8-2 - Body ground*1

J66-27 (FL-) or K7-1 - Body ground*2

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*2

Always

10 kΩ or higher

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

Always

10 kΩ or higher

J66-11 (SR+) or R25-2 - Body ground*3

Always

10 kΩ or higher

J66-26 (SR-) or R25-1 - Body ground*3

Always

10 kΩ or higher

J66-10 (SL+) or S38-2 - Body ground*3

Always

10 kΩ or higher

J66-25 (SL-) or S38-1 - Body ground*3

Always

10 kΩ or higher
  • *1: for 9 Speakers
  • *2: except 9 Speakers
  • *3: for 15 Speakers
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

2.

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 between the rear speaker assembly or the rear No. 2 speaker assembly and body ground to check for a short in the wire harness.

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

3.

CHECK MODEL

(a) Choose the model to be inspected.

Result

Proceed to

except 15 Speakers

A

for 15 Speakers

B
B

GO TO STEP 5

A

4.

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

OK

GO TO STEP 6

NG

REPLACE FRONT NO. 3 SPEAKER ASSEMBLY

5.

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

(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

6.

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

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.

INSPECT REAR SPEAKER ASSEMBLY

(a) Remove the rear speaker assembly.

Click here

(b) Inspect the rear speaker assembly.

Click here

Result

Proceed to

OK (for 9 Speakers)

A

OK (except 9 Speakers)

B

NG

C
B

GO TO STEP 10

C

REPLACE REAR SPEAKER ASSEMBLY

A

9.

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

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY

10.

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.

Result

Proceed to

OK

A

NG (for 12 Speakers)

B

NG (for 15 Speakers)

C
A

END
C

GO TO STEP 12

B

11.

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

OK

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY

NG

REPLACE REAR NO. 3 SPEAKER ASSEMBLY

12.

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

13.

INSPECT QUARTER SIDE SPEAKER ASSEMBLY

(a) Remove the quarter side speaker assembly.

w/o Rear No. 2 Seat: Click here

w/ Rear No. 2 Seat: Click here

(b) Inspect the quarter side speaker assembly.

w/o Rear No. 2 Seat: Click here

w/ Rear No. 2 Seat: Click here

OK

REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY

NG

REPLACE QUARTER SIDE SPEAKER ASSEMBLY

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