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Navigation ECU Communication Stop Mode: Procedure

  1. CHECK OPEN IN CAN NO. 1 BUS WIRE (NAVIGATION ECU BRANCH WIRE) 
    1. Turn the engine switch off.
    2. Disconnect the display and navigation module display (navigation ECU) connector.
      Fig 1: Identifying E62 Display And Navigation Module Display Connector Terminals
      GTY283555Courtesy 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
      E62-21 (CANH) - E62-22 (CANL) Engine switch off 54 to 69 Ω

    NG → REPAIR OR REPLACE CAN NO. 1 BUS BRANCH WIRE OR CONNECTOR (MULTI-DISPLAY) 

    OK: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (+B, IG, ACC, GND) 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 2: Identifying E62 Display And Navigation Module Display Connector Terminals
      GTY262930Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      E62-10 (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
      E62-1 (+B1) - Body ground Always 11 to 14 V
      E62-2 (ACC) - Body ground Engine switch on (ACC) 11 to 14 V
      E62-3 (IG) - Body ground Engine switch on (IG) 11 to 14 V

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   3 

  3. REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY. Refer to  REMOVAL 
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