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 AVC-LAN communication.
      • These DTCs may be stored when an AVC-LAN 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 N14, N15 and N16 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
   N15-6 (GND) - Body ground	Always	Below 1 Ω
   N15-7 (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
   N16-1 (+B) - N15-6 (GND)	Always	11 to 14 V
   N16-5 (+B2) - N15-6 (GND)	Always	11 to 14 V
   N14-12 (ACC) - N15-6 (GND)	Ignition switch ACC	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the E2 navigation receiver assembly connector.
2. Disconnect the N14 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
   E2-5 (ATX+) - N14-8 (TX+)	Always	Below 1 Ω
   E2-15 (ATX-) - N14-7 (TX-)	Always	Below 1 Ω
   E2-5 (ATX+) - Body ground	Always	10 kΩ or higher
   E2-15 (ATX-) - 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 (STEREO COMPONENT AMPLIFIER ASSEMBLY IS DEFECTIVE)