Inspection Procedure

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

   Standard voltage 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester connection	Condition	Specified condition
   MUTE - Body ground	Turn ignition switch to ACC, RSE system is playing → Changing mode	Above 3.5 V → Below 1 V

Fig 1: Inspecting Television Display Assembly Wire Harness Connecting
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

NG: Go to next step. 

1. Disconnect the navigation receiver assembly R14 connector and television display assembly T14 connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester connection	Condition	Specified condition
   R14-6 (MUTE) - T14-26 (MUTE)	Always	Below 1 Ω
   MUTE - Body ground	Always	10 kΩ or higher

Fig 2: Checking Navigation Receiver Assembly - Television Display Assembly Harness And Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step. 

1. Replace the television display assembly and check if it operates normally.

   OK: The navigation system operates normally. 

OK: NORMAL OPERATION 

NG: REPLACE NAVIGATION RECEIVER ASSEMBLY