Inspection Procedure

1. Disconnect the L62 navigation connector.
2. Disconnect the R32 controller connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   RESISTANCE SPECIFICATION CHART
   
   

   Tester Connection	Condition	Specified Condition
   L62-3 (FL+) - R32-3 (L5+)	Always	Below 1 Ω
   L62-4 (FL-) - R32-4 (L5-)	Always	Below 1 Ω
   L62-1 (FR+) - R32-1 (R5+)	Always	Below 1 Ω
   L62-2 (FR-) - R32-2 (R5-)	Always	Below 1 Ω
   L62-5 (SLD1) - R32-5 (SLD5)	Always	Below 1 Ω
   L62-3 (FL+) - Body ground	Always	10 kΩ or higher
   L62-4 (FL-) - Body ground	Always	10 kΩ or higher
   L62-1 (FR+) - Body ground	Always	10 kΩ or higher
   L62-2 (FR-) - Body ground	Always	10 kΩ or higher

   Fig 1: Identifying L62 Navigation And R32 Controller Connectors Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Reconnect the L62 navigation connector.
2. Using an oscilloscope, check the signal waveform between each terminal and body ground according to the conditions, as shown in the chart below.
   Fig 2: Identifying L62 Navigation Connectors Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Signal waveform 

   SIGNAL WAVEFORM
   
   

   Tester Connection	Condition	Specified Condition
   R32-3 (L5+) - Body ground	Audio sound is being produced	A waveform synchronized with sound is output
   R32-4 (LS-) - Body ground	Audio sound is being produced	A waveform synchronized with sound is output
   R32-1 (R5+) - Body ground	Audio sound is being produced	A waveform synchronized with sound is output
   R32-2 (R5-) - Body ground	Audio sound Is being produced	A waveform synchronized with sound Is output

NG: REPLACE DISPLAY AND NAVIGATION ASSEMBLY  (See REMOVAL )

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE  (See PROBLEM SYMPTOMS TABLE )