DTC B15D3: Stereo Component Amplifier Disconnected [08/2020 - 10/2022]: Procedure

1. If DTC B15C3 is output, perform troubleshooting for DTC B15C3 first.

   Result

   Result	Proceed to
   DTC B15C3 is not output.	A
   DTC B15C3 is output.	B

Result: 

B 

GO TO DTC B15C3. Refer to  DTC B15C3: Speaker Output Short [10/2019 - 10/2022]  

Result: 

A 

See step  2

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: 

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

Result: 

B 

See step  4

Result: 

A 

See step  3

1. Remove optional components (including associated wiring).
   NOTE:

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

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  4

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [10/2019 - 10/2022]

   Body Electrical > Navigation System > Clear DTCs 

2. Recheck for DTCs and check that no DTCs are output.

   Refer to DTC CHECK / CLEAR [10/2019 - 10/2022]

   Body Electrical > Navigation System > Trouble Codes 

   OK

   No DTCs are output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ] 

Result: 

NG 

See step  5

1. Disconnect the stereo component amplifier assembly connectors.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   M2-3 (GND) - Body ground	Always	Below 1 Ω
   M2-18 (GND2) - Body ground	Always	Below 1 Ω

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

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   M2-1 (+B) - M2-3 (GND)	Ignition switch off	10.5 to 16 V*1 11 to 14 V*2
   M2-16 (+B2) - M2-3 (GND)	Ignition switch off	10.5 to 16 V*1 11 to 14 V*2
   M3-12 (ACC) - M2-3 (GND)	Ignition switch ACC	10.5 to 16 V*1 11 to 14 V*2

   1. *1: w/ Stop and Start System
   2. *2: w/o Stop and Start System

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  6

1. Disconnect the G3 radio and display receiver assembly connector.
2. Disconnect the M3 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
   G3-5 (TX1+) - M3-8 (TX+)	Always	Below 1 Ω
   G3-6 (TX1-) - M3-7 (TX-)	Always	Below 1 Ω
   G3-5 (TX1+) or M3-8 (TX+) - Body ground	Always	10 kΩ or higher
   G3-6 (TX1-) or M3-7 (TX-) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  7

1. Replace the stereo component amplifier assembly with a new or known good one.

   Refer to REMOVAL [11/2018 - 10/2022]

2. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [10/2019 - 10/2022]

   Body Electrical > Navigation System > Clear DTCs 

3. Recheck for DTCs and check that no DTCs are output.

   Refer to DTC CHECK / CLEAR [10/2019 - 10/2022]

   Body Electrical > Navigation System > Trouble Codes 

   OK

   No DTCs are output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (STEREO COMPONENT AMPLIFIER ASSEMBLY IS DEFECTIVE) 

Result: 

NG 

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [11/2018 - 10/2022]