DTC B15D3: Stereo Component Amplifier Disconnected [12/2019 - 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 [12/2019 - 10/2022]  

Result: 

A 

See step  2

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

   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

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

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.

   Body Electrical > Navigation System > Clear DTCs 

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

   Body Electrical > Navigation System > Trouble Codes 

   OK

   No DTCs are output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

See step  5

1. Disconnect the M37 and M38 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
   M37-3 (GND) - 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
   M37-1 (+B) - M37-3 (GND)*1	Ignition switch off	11 to 14 V
   M37-1 (+B) - M37-3 (GND)*2	Always	11 to 14 V
   M38-12 (ACC) - M37-3 (GND)	Ignition switch ACC	11 to 14 V

   1. *1: for HV Model
   2. *2: for Gasoline Model

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  6

1. Disconnect the H1 radio and display receiver assembly connector.
2. Disconnect the M38 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
   H1-5 (TX1+) - M38-8 (TX+)	Always	Below 1 Ω
   H1-6 (TX1-) - M38-7 (TX-)	Always	Below 1 Ω
   H1-5 (TX1+) or M38-8 (TX+) - Body ground	Always	10 kΩ or higher
   H1-6 (TX1-) or M38-7 (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 [12/2019 - ]

2. Clear the DTCs.

   Body Electrical > Navigation System > Clear DTCs 

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

   Body Electrical > Navigation System > Trouble Codes 

   OK

   No DTCs are output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [12/2019 - 10/2022]