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Home >> Toyota >> 2021 >> Avalon TRD >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Can Communication System - Diagnostic Codes & Circuit Tests (Except Hybrid) (1 Of 2) >> CAN COMMUNICATION SYSTEM (for Gasoline Model) >> Symptom Tests >> Headup Display Communication Stop Mode [04/2018 -] >> Procedure

Headup Display Communication Stop Mode [04/2018 -]: Procedure

  1. CHECK FOR OPEN IN CAN BUS LINES (METER MIRROR SUB-ASSEMBLY BRANCH LINE) 
    1. Disconnect the cable from the negative (-) battery terminal.
    2. Disconnect the H1 meter mirror sub-assembly connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY926265Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Meter Mirror Sub-assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition
      H1-12 (MPX1) - H1-13 (MPX2) Cable disconnected from negative (-) battery terminal 54 to 69 Ω

      Result

      Result 
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (METER MIRROR SUB-ASSEMBLY) 

    Result: 

    OK 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H1-4 (ES) - Body ground Cable disconnected from negative (-) battery terminal Below 1 Ω
      GTY926264Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Meter Mirror Sub-assembly)
    2. Reconnect the cable to the negative (-) battery terminal.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      H1-2 (B) - Body ground Always 11 to 14 V
      H1-1 (IG) - Body ground Engine switch on (IG) 11 to 14 V

      Result

      Result 
      OK
      NG

    Result: 

    OK 

    REPLACE METER MIRROR SUB-ASSEMBLY. Refer to  REMOVAL [04/2018 - 08/2021]  , or refer to  REMOVAL [08/2021 -] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)