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Home >> Toyota >> 2023 >> RAV4 XLE, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 74 (Hybrid Control System (2WD, W/ Nickel Metal Hydride Battery) - Diagnostic Codes (2 Of 6)) >> HYBRID CONTROL SYSTEM (for 2WD 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 [11/2018 - 08/2020] >> 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 [11/2018 - 08/2020]: Procedure

WARNING: This page is about a different car, the 2020 Toyota RAV4 and 2019 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC OUTPUT (HYBRID CONTROL) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    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 power switch off.

    Result: 

    B 

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) 

    Refer to DIAGNOSTIC TROUBLE CODE CHART [11/2018 - 06/2020] , or refer to DIAGNOSTIC TROUBLE CODE CHART [06/2020 - 08/2020]

    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 power switch 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) 

    Refer to PROCEDURE - Step 3 [11/2018 - 06/2020], or see step  9 [06/2020 - 08/2020]

    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) 

    Refer to PROCEDURE - Step 9 [11/2018 - 06/2020] , or see step  9 [06/2020 - 08/2020]

    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 [11/2018 - 02/2019] , or refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020]

    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) Power switch off 10 kΩ or higher
      A31-38 (SI0) - A31-11 (E02) Power 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 [11/2018 - 02/2019] , or refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020]

    Result: 

    OK 

    See step  6

  6. READ VALUE USING TECHSTREAM (COOLING FAN FREQUENCY) 

    Refer to PROCEDURE - Step 4 [11/2018 - 06/2020] , or see step  4 [06/2020 - 08/2020]

    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 

    Refer to PROCEDURE - Step 5 [11/2018 - 06/2020] , or see step  6 [06/2020 - 08/2020]

    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 [11/2018 - 02/2019] , or refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020]

  8. CHECK BATTERY VOLTAGE SENSOR (FREQUENCY) 

    Refer to PROCEDURE - Step 6 [11/2018 - 06/2020] , or see step  6 [06/2020 - 08/2020]

    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 [11/2018 - 02/2019] , or refer to REMOVAL [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020]

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