NAVIGATION SYSTEM, Diagnostic DTC:B15D0

DESCRIPTION

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

WIRING DIAGRAM

*a	Shielded
*b	Stereo Component Amplifier Assembly
*c	Radio Receiver Assembly
*d	MOST Communication Line

CAUTION / NOTICE / HINT

PROCEDURE

1. CHECK OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING)

   
   

   1. Check that optional components (including associated wiring) which generate radio waves are not installed.

      Result
      Result Proceed to Optional components (including associated wiring) are installed. A Optional components (including associated wiring) are not installed. B

      Tech Tips

      
      

      • Electrical noise from radio waves generated by optional components or the wiring for those components may affect AVC-LAN communication.

      • These DTCs may be stored when an AVC-LAN communication error occurs due to electrical noise.

   
   

   B

   GO TO STEP 3 Click here

   A

2. CONFIRM SYMPTOMS

   
   

   1. Turn the power switch off.

   2. Turn the power switch on (ACC) and check if the audio system activates and if the speakers operate.

      Tech Tips

      
      

      • Choose a source such as the radio so that sound can be output from the speakers.

      • If sound from the speakers is low, turn up the volume.

      Result
      Result Proceed to Even after the power switch is turned on (ACC), the navigation system does not activate and sound is not output from the speakers. A The audio system activates when the power switch is turned on (ACC) but the sound stops being output when the amplifier output exceeds a certain level. B

      Tech Tips

      
      

      • If a short occurs in a speaker circuit, the sound from the corresponding speaker will be low or almost impossible to hear. If the volume is turned up in this situation, to prevent excessive current flow due to the short circuit, the stereo component amplifier assembly stops operating when its output exceeds a certain level. When the operation of the stereo component amplifier assembly stops, the navigation system will not function normally. This is because MOST communication will stop due to the shut down of the amplifier causing an error in the MOST network. The stereo component amplifier assembly will start operating again when the power switch is turned off and back on (ACC) again. However, the amplifier will stop operating again if its output exceeds a certain level.

      • When the stereo component amplifier assembly stops operating and a malfunction occurs in the navigation system due to a short in a speaker circuit, this DTC will be stored. In this case, check each speaker circuit and repair or replace malfunctioning parts, and then recheck for DTCs.

   
   

   B

   GO TO AUDIO AND VISUAL SYSTEM Click here

   A

3. CHECK MOST COMMUNICATION CONNECTORS

   
   
   1. 

      *a	Node position number for devices that use MOST communication
      *b	Device name
      *c	Result

      Display the "MOST Line Check" screen.

      Click here

   2. Check the result on the "MOST Line Check" screen.

      Result
      Result Proceed to "NCON" is displayed for "AMP". A "OK" is displayed for all items. B

      
      

      • When "NCON" is displayed for more than 1 item, proceed to the step for the device that has the smallest node position number.

      • The "MOST Line Check" screen can be displayed only when DTC B15D0 is stored.

   
   

   B

   GO TO STEP 6 Click here

   A

4. CONFIRM SYMPTOMS

   
   

   1. Check the MOST communication line connectors.

      
      

      1. Check if the MOST communication line connector between the radio receiver assembly and stereo component amplifier assembly has any connection problems.

         Click here

   2. Display the "MOST Line Check" screen and check the result.

      Click here

      Result
      Result Proceed to "NCON" is displayed for "AMP". A The screen cannot be changed to the "MOST Line Check" screen. B

      Tech Tips

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

   
   

   B

   USE SIMULATION METHOD TO CHECK Click here

   A

5. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY WAKE UP LINE)

   
   
   1. 

      *a	Front view of wire harness connector (to Stereo Component Amplifier Assembly)

      Disconnect the stereo component amplifier assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition P29-8 (WUI) - Body ground Power switch on (ACC) 4.5 V or higher

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY Click here

   NG

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

   
   

   1. Disconnect the I102 radio receiver assembly connector.

   2. Disconnect the P29 stereo component amplifier assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition I102-1 (WUO) - P29-8 (WUI) Always Below 1 Ω I102-1 (WUO) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

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

   
   

   1. Disconnect the I102 radio receiver assembly connector.

   2. Disconnect the P29 stereo component amplifier assembly connector.

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

      Standard Resistance

      Tester Connection Condition Specified Condition I102-2 (MI+) - P29-5 (MO+) Always Below 1 Ω I102-3 (MI-) - P29-6 (MO-) Always Below 1 Ω I102-4 (SLDI) - P29-7 (SLDO) Always Below 1 Ω I102-5 (MO+) - P29-2 (MI+) Always Below 1 Ω I102-6 (MO-) - P29-3 (MI-) Always Below 1 Ω I102-7 (SLDO) - P29-4 (SLDI) Always Below 1 Ω I102-2 (MI+) - Body ground Always 10 kΩ or higher I102-3 (MI-) - Body ground Always 10 kΩ or higher I102-4 (SLDI) - Body ground Always 10 kΩ or higher I102-5 (MO+) - Body ground Always 10 kΩ or higher I102-6 (MO-) - Body ground Always 10 kΩ or higher I102-7 (SLDO) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

8. REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY

   
   

   1. Replace the stereo component amplifier assembly.

      Click here

      Result
      Proceed to NEXT

   
   

   NEXT

9. CLEAR DTC

   
   

   1. Clear the DTCs.

      Click here

      
      Body Electrical > Navigation System > Clear DTCs

      Result
      Proceed to NEXT

   
   

   NEXT

10. CHECK DTC

    
    

    1. Recheck for DTCs and check if the same DTC is output again.

       Click here

       
       Body Electrical > Navigation System > Trouble Codes

       OK
       No DTCs are output.

       Result
       Proceed to OK NG

    
    

    OK

    END (STEREO COMPONENT AMPLIFIER ASSEMBLY IS DEFECTIVE)

    NG

    REPLACE RADIO RECEIVER ASSEMBLY Click here