LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2018 >> Prius Three Touring >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Control System (Nickel Metal Hydride) - Diagnostic Codes (1 Of 9) >> HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY) >> DTC P0A1B-94: Drive Motor "A" Control Module Unexpected Operation [11/2015 - ] >> Procedure

DTC P0A1B-94: Drive Motor "A" Control Module Unexpected Operation [11/2015 - ]: Procedure

  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 reproduction test, turn the power switch on (IG) and shake the wire harnesses vertically and horizontally before checking for DTCs.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  7

    Result: 

    OK 

    See step  2

  2. CHECK GROUND WIRE CONNECTION CONDITION 
    1. Check the installation condition of the ground wires DA and DC.
      GTY694380Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK

      The ground wires DA and DC are securely installed.

      HINT: 

      If performing a reproduction test, turn the power switch on (IG) and shake the wire harnesses vertically and horizontally before checking for DTCs.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  8

    Result: 

    OK 

    See step  3

  3. CHECK FUSIBLE LINK (BATT-MAIN) 
    1. Disconnect the cable from the negative (-) auxiliary battery terminal.
    2. Disconnect the cable from the positive (+) auxiliary battery terminal.
    3. Check the fusible link block assembly (BATT-MAIN) for improper installation.

      OK

      The fusible link block assembly is installed securely and there is no contact problem.

    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      (A59)

      (A59)

      Tester Connection Condition Specified Condition
      A59-1 - A-1 (Positive (+) auxiliary battery terminal) Power switch off Below 1 Ω
      GTY701202Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Fusible Link Block Assembly
    5. Reconnect the cable from the positive (+) auxiliary battery terminal.
    6. Reconnect the cable from the negative (-) auxiliary battery terminal.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  9

    Result: 

    OK 

    See step  4

  4. CHECK FUSE (IGCT-IG) 
    1. Check the IGCT-IG fuse for improper installation.

      OK

      The fuse is installed securely.

      HINT: 

      If performing a reproduction test, turn the power switch on (IG) and gently vibrate the IGCT-IG fuse with a finger before checking for DTCs.

    2. Remove the IGCT-IG fuse from the No. 1 engine room relay block and No. 1 junction block assembly.
      GTY717120Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
      *2 IGCT-IG Fuse
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      IGCT-IG fuse Power switch off Below 1 Ω
    4. Install the IGCT-IG fuse to the No. 1 engine room relay block and No. 1 junction block assembly.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  10

    Result: 

    OK 

    See step  5

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

      OK

      The relay is installed securely.

      HINT: 

      If performing a reproduction test, turn the power switch on (IG) and gently vibrate the IGCT relay with a finger before checking for DTCs.

    2. Remove the IGCT relay from the No. 1 engine room relay block and No. 1 junction block assembly.
      GTY583201Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 No. 1 Engine Room Relay Block and No. 1 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  11

    Result: 

    OK 

    See step  6

  6. 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.

      HINT: 

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

      Powertrain > Hybrid Control > Trouble Codes 

      Result

      Proceed to
      P0A1B-94 only is output.
      DTCs except P0A1B-94 are output.
    5. Turn the power switch off.

    Result: 

    P0A1B-94 only is output. 

    REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS. Refer to  DTC CHECK / CLEAR [11/2015 - 11/2017]  , or refer to  DTC CHECK / CLEAR [11/2017 - 12/2018]  , or refer to  DTC CHECK / CLEAR [12/2018 - ] 

    Result: 

    DTCs except P0A1B-94 are output. 

    GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2015 - 11/2017]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2017 - 12/2018]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2018 - 08/2019]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2019 - 06/2021]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [06/2021 - ] 

  7. CONNECT SECURELY 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  12

  8. CONNECT SECURELY 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  12

  9. REPAIR OR REPLACE MALFUNCTIONING PARTS 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  12

  10. REPAIR OR REPLACE MALFUNCTIONING PARTS 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  12

  11. REPAIR OR REPLACE MALFUNCTIONING PARTS 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  12

  12. CLEAR DTC 

    See step  3

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  13

  13. SIMULATION TEST 
    1. Turn the power switch on (IG) and wait for 2 minutes or more.
    2. Turn the power switch off.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  14

  14. 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

      Proceed to
      No DTCs are output.
      P0A1B-94 only is output.
      DTCs except P0A1B-94 are output.
    5. Turn the power switch off.

    Result: 

    No DTCs are output. 

    END 

    Result: 

    P0A1B-94 only is output. 

    REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS. Refer to  DTC CHECK / CLEAR [11/2015 - 11/2017]  , or refer to  DTC CHECK / CLEAR [11/2017 - 12/2018]  , or refer to  DTC CHECK / CLEAR [12/2018 - ] 

    Result: 

    DTCs except P0A1B-94 are output. 

    GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2015 - 11/2017]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2017 - 12/2018]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2018 - 08/2019]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2019 - 06/2021]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [06/2021 - ] 

scientia non olet · About LEMON Manuals