Lexus RX (RX 350L, RX450h) 2016-2024 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 |
|
WIRING DIAGRAM
for 9 Speakers
for 9 Speakers 
for 12 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 Navigation System.
Click here .gif)
PROCEDURE
| 1. | CHECK MODEL |
(a) Choose the model to be inspected.
| Result | Proceed to |
|---|---|
| for 9 Speakers | A |
| for 12 Speakers | B |
| for 15 Speakers | C |
| B | .gif) | GO TO STEP 11 |
| C | | GO TO STEP 21 |
|
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| 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 |
|
| 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 |
|
| 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:
|
|
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| NG | | REPLACE DCM (TELEMATICS TRANSCEIVER) |
|
| 5. | 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 |
|
| 6. | 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 |
|
| 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 |
|
| 8. | 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 |
|
| 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
(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 CodesOK:
No DTCs are output.
| OK | | END |
|
| 10. | 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 CodesOK:
No DTCs are output.
| OK | | END |
| NG | | REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY |
| 11. | 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 |
|
| 12. | 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 |
|
| 13. | 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:
|
|
| NG | | REPLACE DCM (TELEMATICS TRANSCEIVER) |
|
| 14. | 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 |
|
| 15. | 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 |
|
| 16. | 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 |
|
| 17. | 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 |
|
| 18. | 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 |
|
| 19. | 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 CodesOK:
No DTCs are output.
| OK | | END |
|
| 20. | 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 CodesOK:
No DTCs are output.
| OK | | END |
| NG | | REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY |
| 21. | 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) Disconnect the R25 and S38 quarter side speaker assembly connectors.
(h) 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 |
| J66-11 (SR+) or R25-2 - Body ground | Always | 10 kΩ or higher |
| J66-26 (SR-) or R25-1 - Body ground | Always | 10 kΩ or higher |
| J66-10 (SL+) or S38-2 - Body ground | Always | 10 kΩ or higher |
| J66-25 (SL-) or S38-1 - Body ground | Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 22. | 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 |
|
| 23. | 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:
|
|
| NG | | REPLACE DCM (TELEMATICS TRANSCEIVER) |
|
| 24. | 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 |
|
| 25. | 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 |
|
| 26. | 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 |
|
| 27. | 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 |
|
| 28. | 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
| NG | | REPLACE QUARTER SIDE SPEAKER ASSEMBLY |
|
| 29. | 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 CodesOK:
No DTCs are output.
| OK | | END |
|
| 30. | 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 CodesOK:
No DTCs are output.
| OK | | END |
|
| 31. | 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 CodesOK:
No DTCs are output.
| OK | | END |
| NG | | REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY |
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
- For your information
- Pictorial index
- For safety and security
- Instrument cluster
- Operation of each component
- Driving
- Lexus Display Audio system
- Interior features
- Maintenance and care
- When trouble arises
- Vehicle specifications
- For owners
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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