DTC B1593: No Response from Stereo Component Amplifier; DTC B15D3: Stereo Component Amplifier Disconnected: Procedure

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: 

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

B → See step   3 

A: Go to next step 

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

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

NEXT: Go to next step 

1. Clear the DTCs. Refer to DTC CHECK / CLEAR .
2. Recheck for DTCs and check if the same DTC is output again.

   OK

   No DTCs are output.

NG → See step   4 

OK → END 

1. Disconnect the stereo component amplifier assembly connector.
2. Measure the resistance according to the value(s) in the table below.
   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   P27-2 (GND) - Body ground	Always	Below 1 Ω
   P27-6 (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
   P27-1 (+B) - P27-2 (GND)*1	Always	11 to 14 V
   P27-3 (+B2) - P27-2 (GND)	Always	11 to 14 V

   • *1: w/ Front Center Speaker

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the display and navigation module display connector.
2. Disconnect the stereo component amplifier assembly connector.
3. Disconnect the radio receiver assembly connector.
4. Measure the resistance between the display and navigation module display and the stereo component amplifier assembly according to the value(s) in the table below.
   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   J51-1 (MI+) - P29-6 (MO+)	Always	Below 1 Ω
   J51-5 (MI-) - P29-12 (MO-)	Always	Below 1 Ω
   J51-2 (SLDI) - P29-11 (SLDO)	Always	Below 1 Ω
   J51-1 (MI+) - Body ground	Always	10 kΩ or higher
   J51-5 (MI-) - Body ground	Always	10 kΩ or higher
   J51-2 (SLDI) - Body ground	Always	10 kΩ or higher

5. Measure the resistance between the radio receiver assembly and the stereo component amplifier assembly according to the value(s) in the table below.
   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   J65-11 (MO+) - P29-4 (MI+)	Always	Below 1 Ω
   J65-25 (MO-) - P29-10 (MI-)	Always	Below 1 Ω
   J65-24 (SLDI) - P29-5 (SLDI)	Always	Below 1 Ω
   J65-11 (MO+) - Body ground	Always	10 kΩ or higher
   J65-25 (MO-) - Body ground	Always	10 kΩ or higher
   J65-24 (SLDI) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the stereo component amplifier assembly. Refer to REMOVAL .
2. Clear the DTCs. Refer to DTC CHECK / CLEAR .
3. Recheck for DTCs and check if the same DTC is output again.

   OK

   No DTCs are output.

NG → See step   7 

OK → END