Sound Signal Circuit between Navigation Receiver Assembly and Multi-media Interface ECU: Procedure

1. Using an oscilloscope, check the signal waveform between each terminal and the body ground according to the conditions, as shown in the chart below.
   Fig 1: Checking Navigation Receiver Assembly

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   OK

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

   TEXT IN ILLUSTRATION
   
   

   *1	Component with harness connected (Navigation Receiver Assembly)

NG → See step   2 

OK → See step   3 

1. Disconnect the D59 navigation receiver assembly connector.
2. Disconnect the D66 multi-media interface ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D66-2 (URO+) - D59-2 (CDR+)	Always	Below 1 Ω
   D66-3 (URO-) - D59-3 (CDR-)	Always	Below 1 Ω
   D66-4 (ULO+) - D59-4 (CDL+)	Always	Below 1 Ω
   D66-5 (ULO-) - D59-5 (CDL-)	Always	Below 1 Ω
   D66-1 (USD1) - Body ground	Always	10 kΩ or higher
   D66-2 (URO+) - Body ground	Always	10 kΩ or higher
   D66-3 (URO-) - Body ground	Always	10 kΩ or higher
   D66-4 (ULO+) - Body ground	Always	10 kΩ or higher
   D66-5 (ULO-) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   4