Navigation Receiver Assembly Power Source Circuit: Procedure

1. Disconnect the L40 navigation receiver assembly connector (w/ "Bluetooth" Audio System).
   Fig 1: Identifying L40 Navigation Receiver Assembly Connector (W/ "Bluetooth" Audio System)

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2. Disconnect the L34 navigation receiver assembly connector (w/o "Bluetooth" Audio System).
   Fig 2: Identifying L34 Navigation Receiver Assembly Connector (W/O "Bluetooth" Audio System)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Disconnect the L42 navigation receiver assembly connector.
   Fig 3: Identifying L42 Navigation Receiver Assembly Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L40-20 (GND) - Body ground*4	Always	Below 1 Ω
   L34-7 (GND) - Body ground*5	Always	Below 1 Ω

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   L40-1 (B) - L40-20 (GND)*4	Power switch off	11 to 14 V
   L40-11 (ACC) - L40-20 (GND)*4	Power switch on (ACC)	11 to 14 V
   L42-2 (IG) - L40-20 (GND)*4	Power switch on (IG)	11 to 14 V
   L34-4 (B) - L34-7 (GND)*5	Power switch off	11 to 14 V
   L34-3 (ACC) - L34-7 (GND)*5	Power switch on (ACC)	11 to 14 V
   L42-2 (IG) - L34-7 (GND)*5	Power switch on (IG)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Navigation Receiver Assembly)*4
   *2	Front view of wire harness connector (to Navigation Receiver Assembly)*5
   *3	Front view of wire harness connector (to Navigation Receiver Assembly)

   • *4: w/ "Bluetooth" Audio System
   • *5: w/o "Bluetooth" Audio System

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   2