Lexus RX (RX 350L, RX450h) 2016-2022 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.

  • *: 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.

CONFIRM MODEL

(a) Choose the model to be inspected.

Result

Proceed to

for 9 Speakers

A

for 12 Speakers

B

B

GO TO STEP 16

A

2.

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 (w/ Manual (SOS) Switch)

A

Front No. 3 speaker assembly (w/o Manual (SOS) Switch)

B

Front No. 2 speaker assembly

C

Front No. 1 speaker assembly

D

Rear speaker assembly or rear No. 2 speaker assembly

E

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

E

GO TO STEP 12

A

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

OK

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

OK

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:

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

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. 3 SPEAKER ASSEMBLY)

(a) Disconnect the J66 stereo component amplifier assembly 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

J66-7 (CTR+) - K2-2

Always

Below 1 Ω

J66-22 (CTR-) - K2-1

Always

Below 1 Ω

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

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

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPLACE FRONT NO. 3 SPEAKER ASSEMBLY

8.

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

OK

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

OK:

Malfunction disappears.

OK

END

NG

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

10.

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

OK

11.

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

12.

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

OK

13.

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

OK

14.

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

15.

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

16.

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 (w/ Manual (SOS) Switch)

A

Front No. 3 speaker assembly (w/o Manual (SOS) Switch)

B

Front No. 2 speaker assembly

C

Front No. 1 speaker assembly

D

Rear speaker assembly or rear No. 2 speaker assembly

E

Rear No. 3 speaker assembly

F

HINT:

If sound cannot be heard from any speaker, inspect all of them.

B

GO TO STEP 20

C

GO TO STEP 22

D

GO TO STEP 24

E

GO TO STEP 26

F

GO TO STEP 30

A

17.

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

OK

18.

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

19.

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

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPLACE DCM (TELEMATICS TRANSCEIVER)

20.

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - FRONT NO. 3 SPEAKER ASSEMBLY)

(a) Disconnect the J66 stereo component amplifier assembly 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

J66-7 (CTR+) - K2-2

Always

Below 1 Ω

J66-22 (CTR-) - K2-1

Always

Below 1 Ω

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

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

21.

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

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPLACE FRONT NO. 3 SPEAKER ASSEMBLY

22.

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

OK

23.

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

24.

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

OK

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

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPLACE FRONT NO. 1 SPEAKER ASSEMBLY

26.

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

OK

27.

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

OK

28.

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

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

OK:

Malfunction disappears.

OK

END

NG

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

30.

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

OK

31.

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

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPLACE REAR NO. 3 SPEAKER ASSEMBLY

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