Inspection Procedure

1. Measure the voltage according to the value (s) in the table below.

   Standard Voltage 

   STANDARD VOLTAGE
   
   

   Tester Connection	Condition	Specified Condition
   L23-6 (MUT5) - Body ground	Engine switch on (ACC), audio system is playing → changing modes	3.5 V or higher → Below 1 V

NG: Go to step 2 

Fig 1: Identifying L23 Selector Connector Terminals

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

1. Disconnect the F34 navigation module display 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
   F34-8 (MUTE) - L23-6 (MUT5)	Always	Below 1 Ω
   F34-8 (MUTE) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 2: Identifying F34 Navigation Module Display Connector And L23 Selector Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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