CAN COMMUNICATION SYSTEM (for LHD with Entry and Start System) Navigation ECU Communication Stop Mode

DESCRIPTION

Detection Item Symptom Trouble Area
Navigation ECU Communication Stop Mode

Either condition is met:


  • "Display and Navigation (AVN1)" is not displayed on "Bus Check".

  • "Navigation ECU Communication Stop Mode" in "DTC Combination Table" applies.

  • Power source or inside of navigation receiver assembly

  • Navigation receiver assembly CAN branch wire or connector

  • Navigation receiver assembly

WIRING DIAGRAM

A01DRYPE03

INSPECTION PROCEDURE

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Tech Tips

Operating the engine switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

PROCEDURE


  1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL


    1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the CAN main wire and the CAN branch wire.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the airbag system.

      Note


      • After turning the engine switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work Click here.

      • When disconnecting the cable, some systems need to be initialized after the cable is reconnected Click here.


    NEXT

  2. CHECK FOR OPEN IN CAN BUS WIRE (NAVIGATION RECEIVER ASSEMBLY CAN BRANCH WIRE)


    1. A01DM2OE11
      Text in Illustration
      *A w/o DRL OFF Switch
      *B w/ DRL OFF Switch
      *a

      Front view of wire harness connector

      (to Navigation Receiver Assembly)

      Disconnect the H56*1 or H61*2 navigation receiver assembly connector.


      • *1: w/o DRL OFF Switch

      • *2: w/ DRL OFF Switch

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

      Standard Resistance
      w/o DRL OFF Switch
      Tester Connection Switch Condition Specified Condition
      H56-9 (CANH) - H56-10 (CANL) Engine switch off 54 to 69 Ω
      w/ DRL OFF Switch
      Tester Connection Switch Condition Specified Condition
      H61-9 (CANH) - H61-10 (CANL) Engine switch off 54 to 69 Ω

    NG

    REPAIR OR REPLACE NAVIGATION RECEIVER ASSEMBLY CAN BRANCH WIRE OR CONNECTOR (CANH, CANL)

    OK

  3. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - BATTERY AND BODY GROUND)


    1. A01DN85E03
      Text in Illustration
      *A w/o DRL OFF Switch
      *B w/ DRL OFF Switch
      *a

      Front view of wire harness connector

      (to Navigation Receiver Assembly)

      Connect the cable to the negative (-) battery terminal.

      Note

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected Click here.

    2. Disconnect the H54*1 or H60*2 navigation receiver assembly connector.


      • *1: w/o DRL OFF Switch

      • *2: w/ DRL OFF Switch

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

      Standard Resistance
      w/o DRL OFF Switch
      Tester Connection Condition Specified Condition
      H54-7 (GND1) - Body ground Always Below 1 Ω
      w/ DRL OFF Switch
      Tester Connection Condition Specified Condition
      H60-7 (GND1) - Body ground Always Below 1 Ω

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

      Standard Voltage
      w/o DRL OFF Switch
      Tester Connection Condition Specified Condition
      H54-4 (+B1) - Body ground Always 11 to 14 V
      H54-3 (ACC1) - Body ground Engine switch on (ACC) 11 to 14 V
      H56-1 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      w/ DRL OFF Switch
      Tester Connection Condition Specified Condition
      H60-4 (+B1) - Body ground Always 11 to 14 V
      H60-3 (ACC1) - Body ground Engine switch on (ACC) 11 to 14 V
      H61-1 (IG) - Body ground Engine switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here