Inspection Procedure

1. Disconnect the F34 navigation connector.
2. Disconnect the L23 selector connector.
3. Measure the resistance according to the value (s) in the table below.

   Standard Resistance 

   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   F34-3 (FL+) - L23-3 (L5+)	Always	Below 1 Ω
   F34-4 (FL-) - L23-4 (L5-)
   F34-1 (FR+) - L23-1 (R5+)
   F34-2 (FR-) - L23-2 (R5-)
   F34-3 (FL+) - Body ground	Always	10 kΩ or higher
   F34-4 (FL-) - Body ground
   F34-1 (FR+) - Body ground
   F34-2 (FR-) - Body ground
   F34-5 (SLD1) - Body ground

Fig 1: Identifying F34 Navigation Connector And L23 Selector Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next Step 

1. Reconnect the F34 navigation connector.
2. Using an oscilloscope, check the signal waveform between each terminal and body ground according to the conditions shown in the chart below.
   Fig 2: Identifying F34 Navigation Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Signal Waveform 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   L23-3 (L5+) - Body ground	Audio sound is being produced	A waveform synchronized with sound is output
   L23-4 (L5-) - Body ground
   L23-1 (R5+) - Body ground
   L23-2 (R5-) - Body ground

NG: REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY  (See REMOVAL )

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