Navigation ECU Communication Stop Mode: Procedure

1. Turn the engine switch off.
2. Disconnect the display and navigation module display (navigation ECU) connector (J100).
   Fig 1: Identifying J100 Terminal Connector

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3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   J100-21 (CANH) - J100-22 (CANL)	Engine switch off	54 to 69 Ω

NG → REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (NAVIGATION ECU BRANCH WIRE) 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.
   Fig 2: Identifying J100 Terminal Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   J100-10 (GND1) - Body ground	Always	Below 1 Ω

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   J100-1 (+B1) - Body ground	Always	11 to 14 V
   J100-2 (ACC) - Body ground	Engine switch on (ACC)	11 to 14 V
   J100-3 (IG) - Body ground	Engine switch on (IG)	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

OK → REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY (NAVIGATION ECU)