Dtc B15D3 Stereo Component Amplifier Disconnected

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING)

REMOVE OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING)

CHECK FOR DTC

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - BATTERY AND BODY GROUND)

INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY

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

CHECK STEREO COMPONENT AMPLIFIER ASSEMBLY

DESCRIPTION

HINT:

For the AVC-LAN communication line, the radio and display receiver assembly is the master unit.

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

1. If DTC B15C3 is output, perform troubleshooting for DTC B15C3 first (Click here).
   
2. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
   

HINT:

When replacing the radio and display receiver assembly, it is necessary to perform the vehicle contract setting for Connected Services (w/ Connected Services Function).

1. Check for optional components.
   

   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

      HINT:

      1. Electrical noise from radio waves generated by optional components or the wiring for those components may affect AVC-LAN communication.
         
      2. This DTC may be stored when an AVC-LAN communication error occurs due to electrical noise.
         

1. Remove optional components (including associated wiring).
   

   NOTICE:

   Do not remove optional components or associated wiring without the permission of the customer.

1. Clear the DTCs (Click here).
   

2. Check for DTCs (Click here).
   

   OK:

   No DTCs are output.
   

1. Disconnect the stereo F18 and F74 stereo component amplifier assembly connectors.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   F74-3 (GND) - Body ground	Always	Below 1 Ω
   F74-18 (GND2) - Body ground	Always	Below 1 Ω

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

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   F74-1 (+B) - F74-3 (GND)	Always	11 to 14 V
   F74-16 (+B2) - F74-3 (GND)	Always	11 to 14 V
   F18-12 (ACC) - F74-3 (GND)	Engine switch on (ACC)	11 to 14 V

1. Remove the radio and display receiver assembly (Click here).
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   8 (TX1-) - 7 (TX1+)	Always	60 to 80 Ω

1. Disconnect the F124 radio and display receiver assembly connector.
   

2. Disconnect the F18 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
   F124-7 (TX1+) - F18-8 (TX+)	Always	Below 1 Ω
   F124-8 (TX1-) - F18-7 (TX-)	Always	Below 1 Ω
   F124-7 (TX1+) - Body ground	Always	10 kΩ or higher
   F124-8 (TX1-) - Body ground	Always	10 kΩ or higher

1. Replace the stereo component amplifier assembly with a known good one (Click here).
   

2. Clear the DTCs (Click here).
   

3. Check for DTCs (Click here).
   

   OK:

   No DTCs are output.