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Description: Speaker Circuit

The document describes a procedure for diagnosing issues with speakers in certain Toyota models not producing sound due to a short circuit. It involves using system check mode to identify the affected speaker, then checking the wiring harness and connectors between components like the amplifier and speaker for opens or shorts. If the harness checks out, the speaker or telematics control unit may need replacement if resistance measurements are outside specifications. The goal is to locate the cause of the short circuit preventing sound from the affected speaker.

Uploaded by

Jack Cardiag
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© © All Rights Reserved
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Download as PDF, TXT or read online on Scribd
0% found this document useful (0 votes)
121 views14 pages

Description: Speaker Circuit

The document describes a procedure for diagnosing issues with speakers in certain Toyota models not producing sound due to a short circuit. It involves using system check mode to identify the affected speaker, then checking the wiring harness and connectors between components like the amplifier and speaker for opens or shorts. If the harness checks out, the speaker or telematics control unit may need replacement if resistance measurements are outside specifications. The goal is to locate the cause of the short circuit preventing sound from the affected speaker.

Uploaded by

Jack Cardiag
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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3/6/2017 AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Speaker Circuit; 2014 ­ 2016 MY IS200T IS250 IS300 IS350 [04/2013 ­        ]

Last Modified: 03­03­2017 6.7:8.0.40 Doc ID: RM1000000005VNE


Model Year Start: 2014 Model: IS200T Prod Date Range: [04/2013 ­           ]

Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Speaker Circuit; 2014 ­ 2016 MY IS200T IS250 IS300 IS350
[04/2013 ­        ]

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)*1 or speakers.

*1: w/ Manual (SOS) Switch

WIRING DIAGRAM

https://techinfo.toyota.com/t3Portal/resources/jsp/siviewer/index.jsp?dir=rm/RM30G0U&locale=en&User=false&publicationNumber=RM30G0U&objType=toc… 1/14
3/6/2017 AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Speaker Circuit; 2014 ­ 2016 MY IS200T IS250 IS300 IS350 [04/2013 ­        ]

https://techinfo.toyota.com/t3Portal/resources/jsp/siviewer/index.jsp?dir=rm/RM30G0U&locale=en&User=false&publicationNumber=RM30G0U&objType=toc… 2/14
3/6/2017 AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Speaker Circuit; 2014 ­ 2016 MY IS200T IS250 IS300 IS350 [04/2013 ­        ]

CAUTION / NOTICE / HINT
NOTICE:
If the DCM (telematics transceiver) has been replaced, perform the DCM Activation procedure using the
Techstream (w/ Manual (SOS) Switch).

Click here 

PROCEDURE

1. 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

https://techinfo.toyota.com/t3Portal/resources/jsp/siviewer/index.jsp?dir=rm/RM30G0U&locale=en&User=false&publicationNumber=RM30G0U&objType=toc… 3/14
3/6/2017 AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Speaker Circuit; 2014 ­ 2016 MY IS200T IS250 IS300 IS350 [04/2013 ­        ]

Front No. 2 speaker assembly
A
(w/ Manual (SOS) Switch)

Front No. 2 speaker assembly
B
(w/o Manual (SOS) Switch)

Front No. 1 speaker assembly C

Rear speaker assembly D

Rear No. 3 speaker assembly E

Front No. 3 speaker assembly F

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

B GO TO STEP 5

C GO TO STEP 7

D GO TO STEP 9

E GO TO STEP 11

F GO TO STEP 13

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY ­ DCM
2.
(TELEMATICS TRANSCEIVER) ­ FRONT NO. 2 SPEAKER ASSEMBLY)

(a) Disconnect the P23 stereo component amplifier assembly connector.

(b) Disconnect the K66 DCM (telematics transceiver) connector.

(c) Disconnect the K55 and K56 front No. 2 speaker assembly connectors.

(d) Measure the resistance between the stereo component amplifier assembly and the DCM (telematics
transceiver) to check for an open circuit in the wire harness.
Standard Resistance:

TESTER CONNECTION CONDITION SPECIFIED CONDITION

https://techinfo.toyota.com/t3Portal/resources/jsp/siviewer/index.jsp?dir=rm/RM30G0U&locale=en&User=false&publicationNumber=RM30G0U&objType=toc… 4/14
3/6/2017 AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Speaker Circuit; 2014 ­ 2016 MY IS200T IS250 IS300 IS350 [04/2013 ­        ]

P23­13 (FR+) ­ K66­2 (SPI+) Always Below 1 Ω

P23­28 (FR­) ­ K66­3 (SPI­) Always Below 1 Ω

(e) Measure the resistance between the front No. 2 speaker assembly RH and the DCM (telematics
transceiver) to check for an open circuit in the wire harness.
Standard Resistance:

TESTER CONNECTION CONDITION SPECIFIED CONDITION

K66­5 (SPO+) ­ K55­2 (+) Always Below 1 Ω

K66­6 (SPO­) ­ K55­1 (­) Always Below 1 Ω

(f) Measure the resistance between the front No. 2 speaker assembly LH and the stereo component
amplifier assembly to check for an open circuit in the wire harness.
Standard Resistance:

TESTER CONNECTION CONDITION SPECIFIED CONDITION

P23­12 (FL+) ­ K56­2 (+) Always Below 1 Ω

P23­27 (FL­) ­ K56­1 (­) Always Below 1 Ω

(g) Measure the resistance between the stereo component amplifier assembly and body ground to check
for a short circuit in the wire harness.
Standard Resistance:

TESTER CONNECTION CONDITION SPECIFIED CONDITION

P23­13 (FR+) ­ Body ground Always 10 kΩ or higher

P23­28 (FR­) ­ Body ground Always 10 kΩ or higher

P23­12 (FL+) ­ Body ground Always 10 kΩ or higher

P23­27 (FL­) ­ Body ground Always 10 kΩ or higher

(h) Measure the resistance between the front No. 2 speaker assembly RH and body ground to check for a
short circuit in the wire harness.
Standard Resistance:

TESTER CONNECTION CONDITION SPECIFIED CONDITION

K55­1 (­) ­ Body ground Always 10 kΩ or higher

K55­2 (+) ­ Body ground Always 10 kΩ or higher

NG REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

https://techinfo.toyota.com/t3Portal/resources/jsp/siviewer/index.jsp?dir=rm/RM30G0U&locale=en&User=false&publicationNumber=RM30G0U&objType=toc… 5/14
3/6/2017 AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Speaker Circuit; 2014 ­ 2016 MY IS200T IS250 IS300 IS350 [04/2013 ­        ]

3. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY

(a) Remove the front No. 2 speaker assembly.

Click here 

(b) Measure the resistance according to the value(s)
in the table below.
Standard Resistance:

TESTER CONDITION SPECIFIED


CONNECTION CONDITION

1 (­) ­ 2 (+) Always 3.2 to 4.8 Ω

Component without harness connected
*a
(Front No. 2 Speaker Assembly)

NG REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

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:

https://techinfo.toyota.com/t3Portal/resources/jsp/siviewer/index.jsp?dir=rm/RM30G0U&locale=en&User=false&publicationNumber=RM30G0U&objType=toc… 6/14
3/6/2017 AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Speaker Circuit; 2014 ­ 2016 MY IS200T IS250 IS300 IS350 [04/2013 ­        ]

TESTER CONDITION SPECIFIED


CONNECTION CONDITION

2 (SPI+) ­ 5 (SPO+) Always Below 1 Ω

3 (SPI­) ­ 6 (SPO­) Always Below 1 Ω

2 (SPI+) ­ 3 (SPI­) Always 10 kΩ or higher

5 (SPO+) ­ 6 (SPO­) Always 10 kΩ or higher

2 (SPI+) ­ Body
Always 10 kΩ or higher
ground

3 (SPI­) ­ Body
Always 10 kΩ or higher
ground

Component without harness connected
*a
(DCM (Telematics Transceiver))

PROCEED TO NEXT SUSPECTED AREA SHOWN IN
OK PROBLEM SYMPTOMS TABLE   

NG REPLACE DCM (TELEMATICS TRANSCEIVER)

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY ­ FRONT
5.
NO. 2 SPEAKER ASSEMBLY)

(a) Disconnect the P23 stereo component amplifier assembly connector.

(b) Disconnect the K55 and K56 front No. 2 speaker assembly connectors.

(c) Measure the resistance between each of the front No. 2 speaker assemblies and the stereo
component amplifier assembly to check for an open circuit in the wire harness.
Standard Resistance:

TESTER CONNECTION CONDITION SPECIFIED CONDITION

P23­13 (FR+) ­ K55­2 (+) Always Below 1 Ω

P23­28 (FR­) ­ K55­1 (­) Always Below 1 Ω

P23­12 (FL+) ­ K56­2 (+) Always Below 1 Ω

P23­27 (FL­) ­ K56­1 (­) Always Below 1 Ω

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

https://techinfo.toyota.com/t3Portal/resources/jsp/siviewer/index.jsp?dir=rm/RM30G0U&locale=en&User=false&publicationNumber=RM30G0U&objType=toc… 7/14
3/6/2017 AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Speaker Circuit; 2014 ­ 2016 MY IS200T IS250 IS300 IS350 [04/2013 ­        ]

Standard Resistance:

TESTER CONNECTION CONDITION SPECIFIED CONDITION

P23­13 (FR+) ­ Body ground Always 10 kΩ or higher

P23­28 (FR­) ­ Body ground Always 10 kΩ or higher

P23­12 (FL+) ­ Body ground Always 10 kΩ or higher

P23­27 (FL­) ­ Body ground Always 10 kΩ or higher

NG REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

6. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY

(a) Remove the front No. 2 speaker assembly.

Click here 

(b) Measure the resistance according to the value(s)
in the table below.
Standard Resistance:

TESTER CONDITION SPECIFIED


CONNECTION CONDITION

1 (­) ­ 2 (+) Always 3.2 to 4.8 Ω

Component without harness connected
*a
(Front No. 2 Speaker Assembly)

PROCEED TO NEXT SUSPECTED AREA SHOWN IN
OK PROBLEM SYMPTOMS TABLE   

https://techinfo.toyota.com/t3Portal/resources/jsp/siviewer/index.jsp?dir=rm/RM30G0U&locale=en&User=false&publicationNumber=RM30G0U&objType=toc… 8/14
3/6/2017 AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Speaker Circuit; 2014 ­ 2016 MY IS200T IS250 IS300 IS350 [04/2013 ­        ]

NG REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY ­ FRONT
7.
NO. 1 SPEAKER ASSEMBLY)

(a) Disconnect the P23 stereo component amplifier assembly connector.

(b) Disconnect the N14 and N29 front No. 1 speaker assembly connectors.

(c) Measure the resistance between each of the front No. 1 speaker assemblies and the stereo
component amplifier assembly to check for an open circuit in the wire harness.
Standard Resistance:

TESTER CONNECTION CONDITION SPECIFIED CONDITION

P23­5 (WFR+) ­ N14­1 Always Below 1 Ω

P23­20 (WFR­) ­ N14­2 Always Below 1 Ω

P23­4 (WFL+) ­ N29­1 Always Below 1 Ω

P23­19 (WFL­) ­ N29­2 Always Below 1 Ω

(d) Measure the resistance between the stereo component amplifier assembly and body ground to check
for a short circuit in the wire harness.
Standard Resistance:

TESTER CONNECTION CONDITION SPECIFIED CONDITION

P23­5 (WFR+) ­ Body ground Always 10 kΩ or higher

P23­20 (WFR­) ­ Body ground Always 10 kΩ or higher

P23­4 (WFL+) ­ Body ground Always 10 kΩ or higher

P23­19 (WFL­) ­ Body ground Always 10 kΩ or higher

NG REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

8. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

(a) Remove the front No. 1 speaker assembly.

Click here 

(b) Measure the resistance according to the value(s)

https://techinfo.toyota.com/t3Portal/resources/jsp/siviewer/index.jsp?dir=rm/RM30G0U&locale=en&User=false&publicationNumber=RM30G0U&objType=toc… 9/14
3/6/2017 AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Speaker Circuit; 2014 ­ 2016 MY IS200T IS250 IS300 IS350 [04/2013 ­        ]

in the table below.
Standard Resistance:

TESTER CONDITION SPECIFIED


CONNECTION CONDITION

1 ­ 2 Always 3.2 to 4.8 Ω

Component without harness connected
*a
(Front No. 1 Speaker Assembly)

PROCEED TO NEXT SUSPECTED AREA SHOWN IN
OK PROBLEM SYMPTOMS TABLE   

NG REPLACE FRONT NO. 1 SPEAKER ASSEMBLY

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY ­ REAR
9.
SPEAKER ASSEMBLY)

(a) Disconnect the P23 stereo component amplifier assembly connector.

(b) Disconnect the O4 and O9 rear speaker assembly connectors.

(c) Measure the resistance between each of the rear speaker assemblies and the stereo component
amplifier assembly to check for an open circuit in the wire harness.
Standard Resistance:

TESTER CONNECTION CONDITION SPECIFIED CONDITION

P23­15 (RR+) ­ O4­1 Always Below 1 Ω

P23­30 (RR­) ­ O4­2 Always Below 1 Ω

P23­14 (RL+) ­ O9­1 Always Below 1 Ω

P23­29 (RL­) ­ O9­2 Always Below 1 Ω

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

https://techinfo.toyota.com/t3Portal/resources/jsp/siviewer/index.jsp?dir=rm/RM30G0U&locale=en&User=false&publicationNumber=RM30G0U&objType=to… 10/14
3/6/2017 AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Speaker Circuit; 2014 ­ 2016 MY IS200T IS250 IS300 IS350 [04/2013 ­        ]

Standard Resistance:

TESTER CONNECTION CONDITION SPECIFIED CONDITION

P23­15 (RR+) ­ Body ground Always 10 kΩ or higher

P23­30 (RR­) ­ Body ground Always 10 kΩ or higher

P23­14 (RL+) ­ Body ground Always 10 kΩ or higher

P23­29 (RL­) ­ Body ground Always 10 kΩ or higher

NG REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

10. INSPECT REAR SPEAKER ASSEMBLY

(a) Remove the rear speaker assembly.

Click here 

(b) Measure the resistance according to the value(s)
in the table below.
Standard Resistance:

TESTER CONDITION SPECIFIED


CONNECTION CONDITION

1 ­ 2 Always 3.2 to 4.8 Ω

Component without harness connected
*a
(Rear Speaker Assembly)

PROCEED TO NEXT SUSPECTED AREA SHOWN IN
OK PROBLEM SYMPTOMS TABLE   

https://techinfo.toyota.com/t3Portal/resources/jsp/siviewer/index.jsp?dir=rm/RM30G0U&locale=en&User=false&publicationNumber=RM30G0U&objType=to… 11/14
3/6/2017 AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Speaker Circuit; 2014 ­ 2016 MY IS200T IS250 IS300 IS350 [04/2013 ­        ]

NG REPLACE REAR SPEAKER ASSEMBLY

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY ­ REAR
11.
NO. 3 SPEAKER ASSEMBLY)

(a) Disconnect the P23 stereo component amplifier assembly connector.

(b) Disconnect the P27 rear No. 3 speaker assembly connector.

(c) Measure the resistance between the rear No. 3 speaker assembly and the stereo component amplifier
assembly to check for an open circuit in the wire harness.
Standard Resistance:

TESTER CONNECTION CONDITION SPECIFIED CONDITION

P23­6 (WF1+) ­ P27­1 Always Below 1 Ω

P23­21 (WF1­) ­ P27­2 Always Below 1 Ω

(d) Measure the resistance between the stereo component amplifier assembly and body ground to check
for a short circuit in the wire harness.
Standard Resistance:

TESTER CONNECTION CONDITION SPECIFIED CONDITION

P23­6 (WF1+) ­ Body ground Always 10 kΩ or higher

P23­21 (WF1­) ­ Body ground Always 10 kΩ or higher

NG REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

12. INSPECT REAR NO. 3 SPEAKER ASSEMBLY

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

Click here 

(b) Measure the resistance according to the value(s)
in the table below.
Standard Resistance:

TESTER CONDITION SPECIFIED


CONNECTION CONDITION

https://techinfo.toyota.com/t3Portal/resources/jsp/siviewer/index.jsp?dir=rm/RM30G0U&locale=en&User=false&publicationNumber=RM30G0U&objType=to… 12/14
3/6/2017 AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Speaker Circuit; 2014 ­ 2016 MY IS200T IS250 IS300 IS350 [04/2013 ­        ]

1 ­ 2 Always 2.0 to 3.0 Ω

Component without harness connected
*a
(Rear No. 3 Speaker Assembly)

PROCEED TO NEXT SUSPECTED AREA SHOWN IN
OK
PROBLEM SYMPTOMS TABLE   

NG REPLACE REAR NO. 3 SPEAKER ASSEMBLY   

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY ­ FRONT
13.
NO. 3 SPEAKER ASSEMBLY)

(a) Disconnect the P23 stereo component amplifier assembly connector.

(b) Disconnect the K57 front No. 3 speaker assembly connector.

(c) Measure the resistance between the front No. 3 speaker assembly and the stereo component
amplifier assembly to check for an open circuit in the wire harness.
Standard Resistance:

TESTER CONNECTION CONDITION SPECIFIED CONDITION

P23­7 (CTR+) ­ K57­2 (+) Always Below 1 Ω

P23­22 (CTR­) ­ K57­1 (­) Always Below 1 Ω

(d) Measure the resistance between the stereo component amplifier assembly and body ground to check
for a short circuit in the wire harness.
Standard Resistance:

TESTER CONNECTION CONDITION SPECIFIED CONDITION


https://techinfo.toyota.com/t3Portal/resources/jsp/siviewer/index.jsp?dir=rm/RM30G0U&locale=en&User=false&publicationNumber=RM30G0U&objType=to… 13/14
3/6/2017 AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Speaker Circuit; 2014 ­ 2016 MY IS200T IS250 IS300 IS350 [04/2013 ­        ]

TESTER CONNECTION
P23­7 (CTR+) ­ Body ground CONDITION
Always SPECIFIED CONDITION
10 kΩ or higher

P23­22 (CTR­) ­ Body ground Always 10 kΩ or higher

NG REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

14. INSPECT FRONT NO. 3 SPEAKER ASSEMBLY

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

Click here 

(b) Measure the resistance according to the value(s)
in the table below.
Standard Resistance:

TESTER CONDITION SPECIFIED


CONNECTION CONDITION

1 (­) ­ 2 (+) Always 4.0 to 6.0 Ω

Component without harness connected
*a
(Front No. 3 Speaker Assembly)

PROCEED TO NEXT SUSPECTED AREA SHOWN IN
OK
PROBLEM SYMPTOMS TABLE   

NG REPLACE FRONT NO. 3 SPEAKER ASSEMBLY

https://techinfo.toyota.com/t3Portal/resources/jsp/siviewer/index.jsp?dir=rm/RM30G0U&locale=en&User=false&publicationNumber=RM30G0U&objType=to… 14/14

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