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Hybrid Vehicle Control ECU Communication Stop Mode (2016 - 2017): Procedure

  1. CHECK FOR OPEN IN CAN BUS LINES (HYBRID VEHICLE CONTROL ECU ASSEMBLY BRANCH LINE) 
    1. Disconnect the cable from the negative (-) auxiliary battery terminal.
    2. Disconnect the H2 hybrid vehicle control ECU assembly connector.
      GTY641837Courtesy 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
      H2-25 (CA1H) - H2-24 (CA1L) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to Hybrid Vehicle Control ECU Assembly)

    Result:  NG

    NG 

    REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY) 

    Result:  OK

    OK 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (GROUND TERMINAL) 
    1. Reconnect the H2 hybrid vehicle control ECU assembly connector.
    2. Disconnect the H1 hybrid vehicle control ECU assembly connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY623293Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      H1-6 (E1) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω
      H2-4 (E12) - Body ground Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω
      TEXT IN ILLUSTRATION

      *a Rear view of wire harness connector
      (to Hybrid Vehicle Control ECU Assembly)

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND TERMINAL) 

    Result:  OK

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL) 
    1. Reconnect the H1 hybrid vehicle control ECU assembly connector.
    2. Connect the cable to the negative (-) auxiliary battery terminal.
    3. Measure the voltage according to the value(s) in the table below.
      GTY646609Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage

      Tester Connection Condition Specified Condition
      A33-4 (+B1) - Body ground Power switch on (IG) 11 to 14 V
      A31-1 (+B2) - Body ground Power switch on (IG) 11 to 14 V
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Hybrid Vehicle Control ECU Assembly)

    Result:  OK

    OK 

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY 

    (efer to REMOVAL (2016 - 2017) )

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE TERMINAL) 

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