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Home >> Toyota >> 2020 >> RAV4 XLE, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 28 (Hybrid Control System (Lithium-Ion Battery) - Diagnostic Codes (1 Of 6)) >> HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY) >> DTC P0A1B-94: Drive Motor "A" Control Module Unexpected Operation [06/2020 - ] >> Procedure

DTC P0A1B-94: Drive Motor "A" Control Module Unexpected Operation [06/2020 - ]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK AUXILIARY BATTERY TERMINAL (CONTACT PROBLEM) 
    1. Check the connection of the negative (-) and positive (+) auxiliary battery terminals.

      OK

      The terminals are connected securely and there is no contact problem.

      HINT: 

      If performing a simulation test, turn the ignition switch to ON and shake the wire harnesses vertically and horizontally before checking for DTCs.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  6

    Result: 

    OK 

    See step  2

  2. CHECK GROUND WIRE CONNECTION CONDITION 
    1. Check the installation condition of the ground wires XA and XB.

      OK

      The ground wires XA and XB are securely installed.

      HINT: 

      If performing a simulation test, turn the ignition switch to ON and shake the wire harnesses vertically and horizontally before checking for DTCs.

      GTY882592Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  7

    Result: 

    OK 

    See step  3

  3. CHECK FUSE (IGCT) 
    1. Remove the IGCT fuse from the No. 3 relay block and junction block assembly.
      GTY944312Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 No. 3 Relay Block and Junction Block Assembly
      *2 IGCT Fuse
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      IGCT fuse Always Below 1 Ω
    3. Reinstall the IGCT fuse.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  8

    Result: 

    OK 

    See step  4

  4. CHECK RELAY (IGCT) 
    1. Check the IGCT relay for improper installation.

      OK

      The relay is installed securely.

      HINT: 

      If performing a simulation test, turn the ignition switch to ON and gently vibrate the IGCT relay with a finger before checking for DTCs.

    2. Remove the IGCT relay from the No. 3 relay block and junction block assembly.
      GTY847654Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 No. 3 Relay Block and Junction Block Assembly
      *2 IGCT Relay
    3. Measure the resistance according to the value(s) in the table below.
      GTY434306Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 IGCT Relay

      Standard Resistance

      Tester Connection Condition Specified Condition
      3 - 5 Auxiliary battery voltage not applied between terminals 1 and 2 10 kΩ or higher
      Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω
    4. Install the IGCT relay.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  9

    Result: 

    OK 

    See step  5

  5. 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.

      HINT: 

      Check the DTCs that were output when the vehicle was brought to the workshop.

      Powertrain > Hybrid Control > Trouble Codes 

      Result

      Result Proceed to
      P0A1B-94 only is output. A
      DTCs except P0A1B-94 are output. B
    5. Turn the ignition switch off.

    Result: 

    A 

    REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS 

    Refer to DTC CHECK / CLEAR [06/2020 - 10/2022] , or refer to DTC CHECK / CLEAR [10/2022 - ]

    Result: 

    B 

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) 

    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 - ]

  6. CONNECT SECURELY 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  10

  7. CONNECT SECURELY 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  10

  8. REPAIR OR REPLACE MALFUNCTIONING PARTS 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  10

  9. REPAIR OR REPLACE MALFUNCTIONING PARTS 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  10

  10. CLEAR DTC 

    See step  3

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  11

  11. SIMULATION TEST 
    1. Turn the ignition switch off and wait for 2 minutes or more.
    2. Turn the ignition switch to ON and wait for 2 minutes or more.
    3. Turn the ignition switch off.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  12

  12. 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
      No DTCs are output. A
      P0A1B-94 only is output. B
      DTCs except P0A1B-94 are output. C
    5. Turn the ignition switch off.

    Result: 

    A 

    END 

    Result: 

    B 

    REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS 

    Refer to DTC CHECK / CLEAR [06/2020 - 10/2022] , or refer to DTC CHECK / CLEAR [10/2022 - ]

    Result: 

    C 

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) 

    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 - ]

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