DTC B1561: XM Tuner Disconnected (Command Line); DTC B159F: No Response from XM Tuner: Procedure

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

   Result

   Result	Proceed to
   B1561 or B159F is output.	A
   Either B1561 or B159F and either B156B or B156E are output.	B
   No DTCs are output.	C

   HINT: 

   If either B1561 or B159F and either B156B or B156E are output, troubleshoot for B156B or B156E first.

B → See step   10 

C → See step   11 

A: Go to next step 

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   4 

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   5 

OK → END (STEREO COMPONENT TUNER ASSEMBLY IS DEFECTIVE) 

1. Disconnect the E30 stereo component tuner assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E30-7 (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
   E30-12 (+B) - E30-7 (GND)	Always	11 to 14 V
   E30-11 (ACC) - E30-7 (GND)	Ignition switch ACC	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the E32 multi-media interface ECU connector.
2. Disconnect the E30 stereo component tuner assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E32-4 (TX2+) - E30-9 (TX+)	Always	Below 1 Ω
   E32-5 (TX2-) - E30-10 (TX-)	Always	Below 1 Ω
   E32-4 (TX2+) - Body ground	Always	10 kΩ or higher
   E32-5 (TX2-) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the stereo component tuner 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   8 

OK → END (STEREO COMPONENT TUNER ASSEMBLY IS DEFECTIVE) 

1. Replace the multi-media interface ECU, 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   9 

OK → END (MULTI-MEDIA INTERFACE ECU IS DEFECTIVE)