Sound Signal Circuit Between Navigation Receiver Assembly And Stereo Component Tuner Assembly: Procedure

1. Disconnect the D59 navigation receiver assembly connector.
   Fig 1: Checking Stereo Component Tuner Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Using an oscilloscope, check the signal waveform between each terminal and the body ground according to the conditions, as shown in the chart below.

   OK

   Tester Connection	Condition	Specified Condition
   D59-2 (CDR+) - Body ground	Satellite radio playing	A waveform synchronized with sound is output
   D59-3 (CDR-) - Body ground
   D59-4 (CDL+) - Body ground
   D59-5 (CDL-) - Body ground

   *a	Front view of wire harness connector (to Navigation receiver Assembly)

NG → See step   2 

OK → See step   4 

1. Disconnect the L20 stereo component tuner assembly connector.
2. Disconnect the D59 navigation receiver assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   L20-2 (FRO+) - D59-2 (CDR+)	Always	Below 1 Ω
   L20-3 (FRO-) - D59-3 (CDR-)	Always	Below 1 Ω
   L20-4 (FLO+) - D59-4 (CDL+)	Always	Below 1 Ω
   L20-5 (FLO-) - D59-5 (CDL-)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   L20-2 (FRO+) - Body ground	Always	10 kΩ or higher
   L20-3 (FRO-) - Body ground	Always	10 kΩ or higher
   L20-4 (FLO+) - Body ground	Always	10 kΩ or higher
   L20-5 (FLO-) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   3