FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM: Car repair manuals for everyone.
Home >> Lexus >> 2012 >> LS 460 AWD V8-4.6L (1UR-FSE) >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> B Code Charts >> B15D0 >> Electro Multi Vision System

Electro Multi Vision System





AUDIO / VISUAL: ELECTRO MULTI VISION SYSTEM: B15D0: MOST Communication Malfunction
B15D0 - MOST Communication Malfunction

DESCRIPTION

* This DTC is stored when the MOST network cannot be established after the master unit is activated.





* *1: w/ Rear Seat Entertainment System

* *2: w/ Disc Player Assembly

* *3: for 4-Passenger with Ottoman

HINT
* MOST network cannot be established.
* Errors may occur in MOST communication between devices due to problems such as electrical noise.

WIRING DIAGRAM













INSPECTION PROCEDURE

PROCEDURE

1. CHECK MOST LINE

(a) Enter the "System Check" Operation Check.





(b) Check the result on the "System Check Mode" screen.

Result





*1: w/ Rear Seat Entertainment System

*2: w/ Disc Player Assembly

HINT
* When "NCON" is displayed for more than 1 item, proceed to the step for the device that has the smallest node position number.
* The "System Check Mode" screen can be displayed only when DTC B15D0 is stored.

Text in Illustration





B -- CHECK MOST COMMUNICATION CONNECTOR

C -- CHECK MOST COMMUNICATION CONNECTOR

D -- CHECK MOST COMMUNICATION CONNECTOR

E -- CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO COMPONENT AMPLIFIER)
A -- Continue to next step.

2. CHECK MOST COMMUNICATION CONNECTOR

(a) Check the MOST communication line connectors of the display and navigation module display and stereo component amplifier assembly Electronic Circuit Inspection Procedure.

(b) Display the "System Check Mode" screen and check the result Operation Check.

Result





HINT
When the malfunction in the MOST network is repaired, the screen cannot be changed to the "MOST Line Check" screen.

B -- END
A -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (WAKE UP SIGNAL)

(a) Disconnect the R60 stereo component amplifier assembly connector.





(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





Text in Illustration





NG -- CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO COMPONENT AMPLIFIER)

OK -- REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY Removal

4. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO COMPONENT AMPLIFIER)

(a) Disconnect the L113 radio receiver assembly connector.

(b) Disconnect the R60 stereo component amplifier assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE RADIO RECEIVER ASSEMBLY Removal

5. CHECK MOST COMMUNICATION CONNECTOR

(a) Check the MOST communication line connectors of the display and navigation module display and radio receiver assembly Electronic Circuit Inspection Procedure.

(b) Display the "System Check Mode" screen and check the result Operation Check.

Result





HINT
When the malfunction in the MOST network is repaired, the screen cannot be changed to the "MOST Line Check" screen.

B -- END
A -- Continue to next step.

6. CHECK HARNESS AND CONNECTOR (WAKE UP SIGNAL)

(a) Disconnect the L113 radio receiver assembly connector.





(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





Text in Illustration





NG -- CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - RADIO RECEIVER)

OK -- REPLACE RADIO RECEIVER ASSEMBLY Removal

7. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - RADIO RECEIVER)

(a) Disconnect the L115 display and navigation module display connector.

(b) Disconnect the L113 radio receiver assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Removal

8. CHECK MOST COMMUNICATION CONNECTOR

(a) Check the MOST communication line connectors of the stereo component amplifier assembly and television display assembly Electronic Circuit Inspection Procedure.

(b) Display the "System Check Mode" screen and check the result Operation Check.

Result





HINT
When the malfunction in the MOST network is repaired, the screen cannot be changed to the "MOST Line Check" screen.

B -- END
A -- Continue to next step.

9. CHECK HARNESS AND CONNECTOR (WAKE UP SIGNAL)

(a) Disconnect the R59*1 or R62*2 television display assembly connector.





*1: for 4-Passenger with Ottoman

*2: except 4-Passenger with Ottoman

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

for 4-Passenger with Ottoman
except 4-Passenger with Ottoman










Text in Illustration





Result





B -- REPLACE TELEVISION DISPLAY ASSEMBLY Removal

C -- CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - TELEVISION DISPLAY)

A -- REPLACE TELEVISION DISPLAY ASSEMBLY Removal

10. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - TELEVISION DISPLAY)

(a) Disconnect the R60 stereo component amplifier assembly connector.

(b) Disconnect the R59*1 or R62*2 television display assembly connector.

*1: for 4-Passenger with Ottoman

*2: except 4-Passenger with Ottoman

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

for 4-Passenger with Ottoman
except 4-Passenger with Ottoman










NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY Removal

11. CHECK MOST COMMUNICATION CONNECTOR

(a) Check the MOST communication line connectors of the disc player assembly and television display assembly Electronic Circuit Inspection Procedure.

(b) Display the "System Check Mode" screen and check the result Operation Check.

Result





HINT
When the malfunction in the MOST network is repaired, the screen cannot be changed to the "MOST Line Check" screen.

B -- END
A -- Continue to next step.

12. CHECK HARNESS AND CONNECTOR (WAKE UP SIGNAL)

(a) Disconnect the D*1 or R64*2 disc player assembly connector.

*1: for 4-Passenger with Ottoman

*2: except 4-Passenger with Ottoman





(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

for 4-Passenger with Ottoman
except 4-Passenger with Ottoman










Text in Illustration





Result





B -- REPLACE DISC PLAYER ASSEMBLY Removal

C -- CHECK HARNESS AND CONNECTOR (REAR SEAT CONSOLE BOX ASSEMBLY - TELEVISION DISPLAY AND DISC PLAYER)

D -- CHECK HARNESS AND CONNECTOR (TELEVISION DISPLAY - DISC PLAYER)

A -- REPLACE DISC PLAYER ASSEMBLY Removal

13. CHECK HARNESS AND CONNECTOR (REAR SEAT CONSOLE BOX ASSEMBLY - TELEVISION DISPLAY AND DISC PLAYER)

(a) Disconnect the R16 rear seat console box assembly connector.

(b) Disconnect the R59 television display assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

14. INSPECT REAR SEAT CONSOLE BOX ASSEMBLY

(a) Remove the rear seat console box assembly Removal.





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

Standard Resistance:





NG -- REPLACE REAR SEAT CONSOLE BOX ASSEMBLY Removal

OK -- REPLACE TELEVISION DISPLAY ASSEMBLY Removal

15. CHECK HARNESS AND CONNECTOR (TELEVISION DISPLAY - DISC PLAYER)

(a) Disconnect the R62 television display assembly connector.

(b) Disconnect the R64 disc player assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE TELEVISION DISPLAY ASSEMBLY Removal

16. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - STEREO COMPONENT AMPLIFIER)

(a) Disconnect the L113 radio receiver assembly connector.

(b) Disconnect the R60 stereo component amplifier assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

17. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - RADIO RECEIVER)

(a) Disconnect the L115 display and navigation module display connector.

(b) Disconnect the L113 radio receiver assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





Result





B -- CHECK HARNESS AND CONNECTOR (DISC PLAYER - TELEVISION DISPLAY AND DISPLAY AND NAVIGATION MODULE DISPLAY)

C -- CHECK HARNESS OR CONNECTOR (STEREO COMPONENT AMPLIFIER - DISPLAY AND NAVIGATION MODULE DISPLAY)

D -- REPAIR OR REPLACE HARNESS OR CONNECTOR
A -- Continue to next step.

18. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - TELEVISION DISPLAY)

(a) Disconnect the R60 stereo component amplifier assembly connector.

(b) Disconnect the R59 television display assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





Result





B -- CHECK FOR DTC

C -- REPAIR OR REPLACE HARNESS OR CONNECTOR
A -- Continue to next step.

19. INSPECT REAR SEAT CONSOLE BOX ASSEMBLY

(a) Remove the rear seat console box assembly Removal.





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

Standard Resistance:





NG -- REPLACE REAR SEAT CONSOLE BOX ASSEMBLY Removal
OK -- Continue to next step.

20. CHECK HARNESS AND CONNECTOR (REAR SEAT CONSOLE BOX - TELEVISION DISPLAY)

(a) Disconnect the R16 rear seat console box assembly connector.

(b) Disconnect the R59 television display assembly connector.

(c) Disconnect the L115 display and navigation module display connector.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

21. CHECK FOR DTC

(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(b) Check for DTCs and check if the same trouble occurs again.

OK:

No DTCs are output.

NG -- REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Removal

OK -- USE SIMULATION METHOD TO CHECK Electronic Circuit Inspection Procedure

22. CHECK HARNESS AND CONNECTOR (DISC PLAYER - TELEVISION DISPLAY AND DISPLAY AND NAVIGATION MODULE DISPLAY)

(a) Disconnect the R64 disc player assembly connector.

(b) Disconnect the R62 television display assembly connector.

(c) Disconnect the L115 display and navigation module display connector.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

23. CHECK FOR DTC

(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(b) Check for DTCs and check if the same trouble occurs again.

OK:

No DTCs are output.

NG -- REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Removal

OK -- USE SIMULATION METHOD TO CHECK Electronic Circuit Inspection Procedure

24. CHECK HARNESS OR CONNECTOR (STEREO COMPONENT AMPLIFIER - DISPLAY AND NAVIGATION MODULE DISPLAY)

(a) Disconnect the R60 stereo component amplifier assembly connector.

(b) Disconnect the L115 display and navigation module display connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

25. CHECK FOR DTC

(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(b) Check for DTCs and check if the same trouble occurs again.

OK:

No DTCs are output.

NG -- REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Removal

OK -- USE SIMULATION METHOD TO CHECK Electronic Circuit Inspection Procedure
pro multis Credits:Operation CHARM About Operation CHARM