Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Speaker Circuit
DESCRIPTION
If there is a short in a speaker circuit, the stereo component amplifier assembly detects it and stops output to the speakers.
Thus sound cannot be heard from the speakers even if there is no malfunction in the stereo component amplifier assembly, DCM (telematics transceiver) or speakers.
WIRING DIAGRAM
for 9 Speakers.png)
for 9 Speakers .png)
for 12 Speakers .png)
for 12 Speakers .png)
for 15 Speakers .png)
for 15 Speakers .png)
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 14 |
| C | | GO TO STEP 28 |
|
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| 2. | CHECK SPEAKER (OPERATION CHECK) |
| (a) Enter the "System Check Mode" screen. Refer to Check SP Check On in Operation Check. Click here |
|
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(b) Perform the operation check above and determine the speaker that is not operating.
| Not Operating Speaker | Proceed to |
|---|---|
| Front No. 3 speaker assembly | A |
| Front No. 2 speaker assembly | B |
| Front No. 1 speaker assembly | C |
| Rear speaker assembly or rear No. 2 speaker assembly | D |
HINT:
If sound cannot be heard from any speaker, inspect all of them.
| B | | GO TO STEP 6 |
| C | | GO TO STEP 8 |
| D | | GO TO STEP 10 |
|
| 3. | CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER) - FRONT NO. 3 SPEAKER ASSEMBLY) |
(a) Disconnect the J66 stereo component amplifier assembly connector.
(b) Disconnect the J155 DCM (telematics transceiver) connector.
(c) Disconnect the K2 front No. 3 speaker assembly connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| J66-7 (CTR+) - J155-1 (SPI+) | Always | Below 1 Ω |
| J66-22 (CTR-) - J155-2 (SPI-) | Always | Below 1 Ω |
| K2-2 - J155-3 (SPO+) | Always | Below 1 Ω |
| K2-1 - J155-4 (SPO-) | Always | Below 1 Ω |
| 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 |
| 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 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 |
|
| 5. | 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:
|
|
.png)
| OK | | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | | REPLACE DCM (TELEMATICS TRANSCEIVER) |
| 6. | CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - FRONT NO. 2 SPEAKER ASSEMBLY) |
(a) Disconnect the J66 stereo component amplifier assembly connector.
(b) Disconnect the K6 and K8 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 |
|---|---|---|
| J66-13 (FR+) - K6-4 | Always | Below 1 Ω |
| J66-28 (FR-) - K6-2 | Always | Below 1 Ω |
| J66-12 (FL+) - K8-4 | Always | Below 1 Ω |
| J66-27 (FL-) - K8-2 | Always | Below 1 Ω |
| 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 |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 7. | 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
OK:
Malfunction disappears.
| OK | | END |
| NG | | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| 8. | CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - FRONT NO. 1 SPEAKER ASSEMBLY) |
(a) Disconnect the J66 stereo component amplifier assembly connector.
(b) Disconnect the M3 and N3 front No. 1 speaker assembly connectors.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| J66-5 (WFR+) - M3-1 | Always | Below 1 Ω |
| J66-20 (WFR-) - M3-2 | Always | Below 1 Ω |
| J66-4 (WFL+) - N3-1 | Always | Below 1 Ω |
| J66-19 (WFL-) - N3-2 | Always | Below 1 Ω |
| 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 |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 9. | 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
| OK | | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | | REPLACE FRONT NO. 1 SPEAKER ASSEMBLY |
| 10. | CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - REAR NO. 2 SPEAKER ASSEMBLY) |
(a) Disconnect the J66 stereo component amplifier assembly connector.
(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 |
|---|---|---|
| J66-9 (RR+) - O5-4 (+TW) | Always | Below 1 Ω |
| J66-24 (RR-) - O5-2 (-TW) | Always | Below 1 Ω |
| J66-8 (RL+) - P5-4 (+TW) | Always | Below 1 Ω |
| J66-23 (RL-) - P5-2 (-TW) | Always | Below 1 Ω |
| 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 |
|
| 11. | CHECK HARNESS AND CONNECTOR (REAR SPEAKER ASSEMBLY - REAR NO. 2 SPEAKER ASSEMBLY) |
(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 - O5-3 (+) | Always | Below 1 Ω |
| O2-2 - O5-1 (-) | Always | Below 1 Ω |
| P2-1 - P5-3 (+) | Always | Below 1 Ω |
| P2-2 - P5-1 (-) | Always | Below 1 Ω |
| 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 |
|
| 12. | 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 |
|
| 13. | 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
OK:
Malfunction disappears.
| OK | | END |
| NG | | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| 14. | CHECK SPEAKER (OPERATION CHECK) |
| (a) Enter the "System Check Mode" screen. Refer to Check SP Check On in Operation Check. Click here |
|
(b) Perform the operation check above and determine the speaker that is not operating.
| Not Operating Speaker | Proceed to |
|---|---|
| Front No. 3 speaker assembly | A |
| Front No. 2 speaker assembly | B |
| Front No. 1 speaker assembly | C |
| Rear speaker assembly or rear No. 2 speaker assembly | D |
| Rear No. 3 speaker assembly | E |
HINT:
If sound cannot be heard from any speaker, inspect all of them.
| B | | GO TO STEP 18 |
| C | | GO TO STEP 20 |
| D | | GO TO STEP 22 |
| E | | GO TO STEP 26 |
|
| 15. | CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER) - FRONT NO. 3 SPEAKER ASSEMBLY) |
(a) Disconnect the J66 stereo component amplifier assembly connector.
(b) Disconnect the J155 DCM (telematics transceiver) connector.
(c) Disconnect the K2 front No. 3 speaker assembly connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| J66-7 (CTR+) - J155-1 (SPI+) | Always | Below 1 Ω |
| J66-22 (CTR-) - J155-2 (SPI-) | Always | Below 1 Ω |
| K2-2 - J155-3 (SPO+) | Always | Below 1 Ω |
| K2-1 - J155-4 (SPO-) | Always | Below 1 Ω |
| 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 |
| 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 |
|
| 16. | 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 |
|
| 17. | 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:
|
|
| OK | | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | | REPLACE DCM (TELEMATICS TRANSCEIVER) |
| 18. | CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - FRONT NO. 2 SPEAKER ASSEMBLY) |
(a) Disconnect the J66 stereo component amplifier assembly connector.
(b) Disconnect the K5 and K7 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 |
|---|---|---|
| J66-13 (FR+) - K5-2 | Always | Below 1 Ω |
| J66-28 (FR-) - K5-1 | Always | Below 1 Ω |
| J66-12 (FL+) - K7-2 | Always | Below 1 Ω |
| J66-27 (FL-) - K7-1 | Always | Below 1 Ω |
| 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 |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 19. | 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
OK:
Malfunction disappears.
| OK | | END |
| NG | | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| 20. | CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - FRONT NO. 1 SPEAKER ASSEMBLY) |
(a) Disconnect the J66 stereo component amplifier assembly connector.
(b) Disconnect the M3 and N3 front No. 1 speaker assembly connectors.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| J66-5 (WFR+) - M3-1 | Always | Below 1 Ω |
| J66-20 (WFR-) - M3-2 | Always | Below 1 Ω |
| J66-4 (WFL+) - N3-1 | Always | Below 1 Ω |
| J66-19 (WFL-) - N3-2 | Always | Below 1 Ω |
| 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 |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 21. | 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
| OK | | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | | REPLACE FRONT NO. 1 SPEAKER ASSEMBLY |
| 22. | CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - REAR NO. 2 SPEAKER ASSEMBLY) |
(a) Disconnect the J66 stereo component amplifier assembly connector.
(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 |
|---|---|---|
| J66-9 (RR+) - O5-4 (+TW) | Always | Below 1 Ω |
| J66-24 (RR-) - O5-2 (-TW) | Always | Below 1 Ω |
| J66-8 (RL+) - P5-4 (+TW) | Always | Below 1 Ω |
| J66-23 (RL-) - P5-2 (-TW) | Always | Below 1 Ω |
| 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 |
|
| 23. | CHECK HARNESS AND CONNECTOR (REAR SPEAKER ASSEMBLY - REAR NO. 2 SPEAKER ASSEMBLY) |
(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 - O5-3 (+) | Always | Below 1 Ω |
| O2-2 - O5-1 (-) | Always | Below 1 Ω |
| P2-1 - P5-3 (+) | Always | Below 1 Ω |
| P2-2 - P5-1 (-) | Always | Below 1 Ω |
| 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 |
|
| 24. | 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 |
|
| 25. | 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
OK:
Malfunction disappears.
| OK | | END |
| NG | | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| 26. | CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - REAR NO. 3 SPEAKER ASSEMBLY) |
(a) Disconnect the J66 stereo component amplifier assembly connector.
(b) Disconnect the S53 rear 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 |
|---|---|---|
| J66-6 (WF1+) - S53-1 | Always | Below 1 Ω |
| J66-21 (WF1-) - S53-2 | Always | Below 1 Ω |
| 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 |
|
| 27. | INSPECT REAR NO. 3 SPEAKER ASSEMBLY |
(a) Remove the rear No. 3 speaker assembly.
w/ Rear No. 2 Seat: Click here
w/o Rear No. 2 Seat: Click here
(b) Inspect the rear No. 3 speaker assembly.
w/ Rear No. 2 Seat: Click here
w/o Rear No. 2 Seat: Click here
| OK | | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | | REPLACE REAR NO. 3 SPEAKER ASSEMBLY |
| 28. | CHECK SPEAKER (OPERATION CHECK) |
| (a) Enter the "System Check Mode" screen. Refer to Check SP Check On in Operation Check. Click here |
|
(b) Perform the operation check above and determine the speaker that is not operating.
| Not Operating Speaker | Proceed to |
|---|---|
| Front No. 3 speaker assembly | A |
| Front No. 2 speaker assembly | B |
| Front No. 1 speaker assembly | C |
| Rear speaker assembly or rear No. 2 speaker assembly | D |
| Rear No. 3 speaker assembly | E |
| Quarter side speaker assembly | F |
HINT:
If sound cannot be heard from any speaker, inspect all of them.
| B | | GO TO STEP 32 |
| C | | GO TO STEP 34 |
| D | | GO TO STEP 36 |
| E | | GO TO STEP 40 |
| F | | GO TO STEP 42 |
|
| 29. | CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER) - FRONT NO. 3 SPEAKER ASSEMBLY) |
(a) Disconnect the J66 stereo component amplifier assembly connector.
(b) Disconnect the J155 DCM (telematics transceiver) connector.
(c) Disconnect the K2 front No. 3 speaker assembly connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| J66-7 (CTR+) - J155-1 (SPI+) | Always | Below 1 Ω |
| J66-22 (CTR-) - J155-2 (SPI-) | Always | Below 1 Ω |
| K2-2 - J155-3 (SPO+) | Always | Below 1 Ω |
| K2-1 - J155-4 (SPO-) | Always | Below 1 Ω |
| 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 |
| 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 |
|
| 30. | 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:
Malfunction disappears.
| OK | | END |
|
| 31. | 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:
|
|
| OK | | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | | REPLACE DCM (TELEMATICS TRANSCEIVER) |
| 32. | CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - FRONT NO. 2 SPEAKER ASSEMBLY) |
(a) Disconnect the J66 stereo component amplifier assembly connector.
(b) Disconnect the K5 and K7 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 |
|---|---|---|
| J66-13 (FR+) - K5-2 | Always | Below 1 Ω |
| J66-28 (FR-) - K5-1 | Always | Below 1 Ω |
| J66-12 (FL+) - K7-2 | Always | Below 1 Ω |
| J66-27 (FL-) - K7-1 | Always | Below 1 Ω |
| 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 |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 33. | 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
OK:
Malfunction disappears.
| OK | | END |
| NG | | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| 34. | CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - FRONT NO. 1 SPEAKER ASSEMBLY) |
(a) Disconnect the J66 stereo component amplifier assembly connector.
(b) Disconnect the M3 and N3 front No. 1 speaker assembly connectors.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| J66-5 (WFR+) - M3-1 | Always | Below 1 Ω |
| J66-20 (WFR-) - M3-2 | Always | Below 1 Ω |
| J66-4 (WFL+) - N3-1 | Always | Below 1 Ω |
| J66-19 (WFL-) - N3-2 | Always | Below 1 Ω |
| 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 |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 35. | 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
| OK | | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | | REPLACE FRONT NO. 1 SPEAKER ASSEMBLY |
| 36. | CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - REAR NO. 2 SPEAKER ASSEMBLY) |
(a) Disconnect the J66 stereo component amplifier assembly connector.
(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 |
|---|---|---|
| J66-9 (RR+) - O5-4 (+TW) | Always | Below 1 Ω |
| J66-24 (RR-) - O5-2 (-TW) | Always | Below 1 Ω |
| J66-8 (RL+) - P5-4 (+TW) | Always | Below 1 Ω |
| J66-23 (RL-) - P5-2 (-TW) | Always | Below 1 Ω |
| 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 |
|
| 37. | CHECK HARNESS AND CONNECTOR (REAR SPEAKER ASSEMBLY - REAR NO. 2 SPEAKER ASSEMBLY) |
(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 - O5-3 (+) | Always | Below 1 Ω |
| O2-2 - O5-1 (-) | Always | Below 1 Ω |
| P2-1 - P5-3 (+) | Always | Below 1 Ω |
| P2-2 - P5-1 (-) | Always | Below 1 Ω |
| 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 |
|
| 38. | 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 |
|
| 39. | 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
OK:
Malfunction disappears.
| OK | | END |
| NG | | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| 40. | CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - REAR NO. 3 SPEAKER ASSEMBLY) |
(a) Disconnect the J66 stereo component amplifier assembly connector.
(b) Disconnect the S53 rear 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 |
|---|---|---|
| J66-6 (WF1+) - S53-1 | Always | Below 1 Ω |
| J66-21 (WF1-) - S53-2 | Always | Below 1 Ω |
| 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 |
|
| 41. | INSPECT REAR NO. 3 SPEAKER ASSEMBLY |
(a) Remove the rear No. 3 speaker assembly.
w/ Rear No. 2 Seat: Click here
w/o Rear No. 2 Seat: Click here
(b) Inspect the rear No. 3 speaker assembly.
w/ Rear No. 2 Seat: Click here
w/o Rear No. 2 Seat: Click here
| OK | | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | | REPLACE REAR NO. 3 SPEAKER ASSEMBLY |
| 42. | CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - QUARTER SIDE SPEAKER ASSEMBLY) |
(a) Disconnect the J66 stereo component amplifier assembly connector.
(b) Disconnect the R25 and S38 quarter side speaker assembly connectors.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| J66-11 (SR+) - R25-2 | Always | Below 1 Ω |
| J66-26 (SR-) - R25-1 | Always | Below 1 Ω |
| J66-10 (SL+) - S38-2 | Always | Below 1 Ω |
| J66-25 (SL-) - S38-1 | Always | Below 1 Ω |
| 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 |
|
| 43. | INSPECT QUARTER SIDE SPEAKER ASSEMBLY |
(a) Remove the quarter side speaker assembly.
w/ Rear No. 2 Seat: Click here
w/o Rear No. 2 Seat: Click here
(b) Inspect the quarter side speaker assembly.
w/ Rear No. 2 Seat: Click here
w/o Rear No. 2 Seat: Click here
| OK | | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | | REPLACE QUARTER SIDE SPEAKER ASSEMBLY |
Sound Signal Circuit between Radio Receiver and Stereo Jack Adapter
DESCRIPTION The No. 1 stereo jack adapter assembly sends the sound signal from an external device to the radio receiver assembly via this circuit. WIRING DIAGRAM PROCEDURE 1. CHECK HARNESS AND ...
Data Signal Circuit between Radio Receiver and Stereo Jack Adapter
DESCRIPTION The No. 1 stereo jack adapter assembly sends the sound data signal or image data signal from a USB device to the radio receiver assembly via this circuit. WIRING DIAGRAM PROCEDURE 1. ...
Other materials:
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Sfi System: Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be dis ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Power Mirror Control System (w/o Memory): Driver Side Power Mirror cannot be Adjusted with Power Mirror Switch
DESCRIPTION The multiplex network master switch assembly sends the mirror adjust switch signals to the main body ECU (multiplex network body ECU) via LIN communication. The main body ECU (multiplex network body ECU) then sends the received mirror adjust switch signals to the outer mirror control ECU ...
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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