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Navigation ECU Communication Stop Mode: Procedure

  1. CHECK FOR OPEN IN CAN BUS WIRE (DISPLAY AND NAVIGATION MODULE DISPLAY BRANCH WIRE) 
    1. Turn the engine switch off.
    2. Disconnect the display and navigation module display connector (J100).
      Fig 1: Identifying J100 Connector End View
      GTY393738Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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 (DISPLAY AND NAVIGATION MODULE DISPLAY BRANCH WIRE) 

    OK: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 2: Identifying J100 Connector End View
      GTY393737Courtesy 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 

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