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Home >> Toyota >> 2020 >> RAV4 LE, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 65 (Hybrid Control System (AWD, W/ Nickel Metal Hydride Battery) - Diagnostic Codes (2 Of 8)) >> HYBRID CONTROL SYSTEM (for AWD with NICKEL METAL HYDRIDE BATTERY) >> DTC P0A81-96: Hybrid/EV Battery Cooling Fan 1 Component Internal Failure; DTC P0A81-98: Hybrid/EV Battery Cooling Fan 1 Component or System Over Temperature [02/2019 - ] >> Procedure

DTC P0A81-96: Hybrid/EV Battery Cooling Fan 1 Component Internal Failure; DTC P0A81-98: Hybrid/EV Battery Cooling Fan 1 Component or System Over Temperature [02/2019 - ]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK DTC OUTPUT (HYBRID CONTROL) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
    4. Check for DTCs.

      Powertrain > Hybrid Control > Trouble Codes 

      Result

      Result Proceed to
      P0AFC-00 or P0AFC-96 is not output. A
      P0AFC-00 or P0AFC-96 is output. B
    5. Turn the ignition switch off.

    Result: 

    B 

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) 

    Refer to DIAGNOSTIC TROUBLE CODE CHART [02/2019 - 06/2020] , or refer to DIAGNOSTIC TROUBLE CODE CHART [06/2020 - 12/2021] , or refer to DIAGNOSTIC TROUBLE CODE CHART [12/2021 - 11/2024] , or refer to DIAGNOSTIC TROUBLE CODE CHART [11/2024 - ]

    Result: 

    A 

    See step  2

  2. CHECK DUCT AND BLOWER 
    WARNING:

    Be sure to wear insulated gloves.

    1. Check that the service plug grip is not installed.
      NOTE:

      After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the appropriate service information because this may cause a malfunction.

    2. Remove the rear seat cushion leg sub-assembly.

      Refer to PROCEDURE - Step 8

    3. Check that the No. 1 HV battery intake filter, battery cooling blower assembly, No. 1 hybrid battery intake duct and No. 1 hybrid battery intake duct LH are not disconnected, damaged, or clogged with foreign matter.
      GTY917013Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 No. 1 HV Battery Intake Filter *2 Battery Cooling Blower Assembly
      *3 No. 1 Hybrid Battery Intake Duct *4 No. 1 Hybrid Battery Intake Duct LH

      OK

      The No. 1 HV battery intake filter, No. 1 hybrid battery intake duct, No. 1 hybrid battery intake duct LH and battery cooling blower assembly blower are not disconnected, damaged, or clogged with foreign matter.

    4. Install the rear seat cushion leg sub-assembly.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    CORRECT THE PROBLEM 

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (BATTERY VOLTAGE SENSOR - BATTERY COOLING BLOWER ASSEMBLY) 

    See step  3 [02/2019 - 06/2020], or see step  9 [06/2020 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - BATTERY COOLING BLOWER ASSEMBLY) 

    See step  9 [02/2019 - 06/2020], or see step  9 [06/2020 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  5

  5. CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY (GROUND SHORT CHECK) 
    1. Remove the hybrid vehicle control ECU assembly.

      Refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021] , or refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

    2. Measure the resistance according to the value(s) in the table below.
      GTY888718Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Hybrid Vehicle Control ECU Assembly)      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      A31-38 (SI0) - A31-12 (E01) Ignition switch off 10 kΩ or higher
      A31-38 (SI0) - A31-11 (E02) Ignition switch off 10 kΩ or higher
    3. Install the hybrid vehicle control ECU assembly.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY 

    Refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021] , or refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

    Result: 

    OK 

    See step  6

  6. READ VALUE USING TECHSTREAM (COOLING FAN FREQUENCY) 

    See step  4 [02/2019 - 06/2020], or see step  4 [06/2020 - ]

    Result

    Result Proceed to
    Both of the values in the Data List (Hybrid Battery Cooling Fan 1 Frequency) and the actual measured value at the battery voltage sensor connector are 0 Hz. A
    Other than above B

    Result: 

    B 

    See step  8

    Result: 

    A 

    See step  7

  7. CHECK BATTERY VOLTAGE SENSOR 

    See step  5 [02/2019 - 06/2020], or see step  6 [06/2020 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

    REPLACE BATTERY COOLING BLOWER ASSEMBLY 

    Refer to REMOVAL [11/2018 - ]

    Result: 

    NG 

    REPLACE BATTERY VOLTAGE SENSOR 

    Refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021] , or refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

  8. CHECK BATTERY VOLTAGE SENSOR (FREQUENCY) 

    See step  6 [02/2019 - 06/2020], or see step  6 [06/2020 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

    REPLACE BATTERY COOLING BLOWER ASSEMBLY 

    Refer to REMOVAL [11/2018 - ]

    Result: 

    NG 

    REPLACE BATTERY VOLTAGE SENSOR 

    Refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021] , or refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

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