DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 95 (Motor Generator Control System (2WD) - Diagnostic Codes (4 Of 4)) >> MOTOR GENERATOR CONTROL SYSTEM (for 2WD) >> DTC P314F-1F: DC/DC Converter Voltage Sensor "A" (VL) Circuit Intermittent [12/2019 - 11/2023] >> Procedure

DTC P314F-1F: DC/DC Converter Voltage Sensor "A" (VL) Circuit Intermittent [12/2019 - 11/2023]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK DTC OUTPUT 
    1. Check for DTCs.

      Powertrain > Hybrid Control > Trouble Codes 

      Powertrain > Motor Generator > Trouble Codes 

      Result

      Result Proceed to
      P314F-1F only is output, or DTCs except the ones in the tables below are also output. A
      DTCs of hybrid control system in the tables below are output. B
      DTCs of motor generator control system in the tables below are output. C

      Table 1

      Malfunction Content System Relevant DTC
      Insulation Malfunction Hybrid control system P1C7C-49 Hybrid/EV Battery Voltage System Isolation (A/C Area) Internal Electronic Failure
      P1C7D-49 Hybrid/EV Battery Voltage System Isolation (Hybrid/EV Battery Area) Internal Electronic Failure
      P1C7E-49 Hybrid/EV Battery Voltage System Isolation (Transaxle Area) Internal Electronic Failure
      P1C7F-49 Hybrid/EV Battery Voltage System Isolation (Direct Current Area) Internal Electronic Failure
      System Main Relay or High Voltage Circuit Malfunction Hybrid control system P0AD9-11 Hybrid/EV Battery Positive Contactor Circuit Short to Ground
      P0AD9-15 Hybrid/EV Battery Positive Contactor Circuit Short to Auxiliary Battery or Open
      P0ADD-11 Hybrid/EV Battery Negative Contactor Circuit Short to Ground
      P0ADD-15 Hybrid/EV Battery Negative Contactor Circuit Short to Auxiliary Battery or Open
      P1C84-49 High Voltage Power Resource Circuit Short during Ready ON
      HV Battery Malfunction Hybrid control system P0AFC-16 Hybrid/EV Battery Sensor Module Circuit Voltage Below Threshold
      P0AFC-96 Hybrid/EV Battery Sensor Module Component Internal Failure
      P1AC0-00 Hybrid/EV Battery Cell Low Voltage
      P1AD0-1B Hybrid/EV Battery Block Circuit Resistance Above Threshold
      P1CBE-1E Hybrid/EV Battery Block 1 Voltage Difference Out of Range
      P1CBF-1E Hybrid/EV Battery Block 2 Voltage Difference Out of Range
      P1CC0-1E Hybrid/EV Battery Block 3 Voltage Difference Out of Range
      P1CC1-1E Hybrid/EV Battery Block 4 Voltage Difference Out of Range
      P1CC2-1E Hybrid/EV Battery Block 5 Voltage Difference Out of Range
      P1CC3-1E Hybrid/EV Battery Block 6 Voltage Difference Out of Range
      P1CC4-1E Hybrid/EV Battery Block 7 Voltage Difference Out of Range
      P1CC5-1E Hybrid/EV Battery Block 8 Voltage Difference Out of Range
      P1CC6-1E Hybrid/EV Battery Block 9 Voltage Difference Out of Range
      P1CC7-1E Hybrid/EV Battery Block 10 Voltage Difference Out of Range
      P1CFD-1E Hybrid/EV Battery Block 11 Voltage Difference Out of Range
      P1BF0-1E Hybrid/EV Battery Block 12 Voltage Difference Out of Range
      P3011-00 Hybrid/EV Battery Block 1 Circuit Resistance Out of Range (Extreme)
      P3012-00 Hybrid/EV Battery Block 2 Circuit Resistance Out of Range (Extreme)
      P3013-00 Hybrid/EV Battery Block 3 Circuit Resistance Out of Range (Extreme)
      P3014-00 Hybrid/EV Battery Block 4 Circuit Resistance Out of Range (Extreme)
      P3015-00 Hybrid/EV Battery Block 5 Circuit Resistance Out of Range (Extreme)
      P3016-00 Hybrid/EV Battery Block 6 Circuit Resistance Out of Range (Extreme)
      P3017-00 Hybrid/EV Battery Block 7 Circuit Resistance Out of Range (Extreme)
      P3018-00 Hybrid/EV Battery Block 8 Circuit Resistance Out of Range (Extreme)
      P3019-00 Hybrid/EV Battery Block 9 Circuit Resistance Out of Range (Extreme)
      P3020-00 Hybrid/EV Battery Block 10 Circuit Resistance Out of Range (Extreme)
      P3021-00 Hybrid/EV Battery Block 11 Circuit Resistance Out of Range (Extreme)
      P3022-00 Hybrid/EV Battery Block 12 Circuit Resistance Out of Range (Extreme)
      U029A-87 Lost Communication with Hybrid/EV Battery Sensor Module Missing Message
      TABLE 2

      Malfunction Content System Relevant DTC
      Microcomputer malfunction Motor generator control system P0A1A-47 Generator Control Module Watchdog / Safety MC Failure
      P0A1A-49 Generator Control Module Internal Electronic Failure
      P0A1B-1F Generator Control Module Circuit Intermittent
      P1C2A-1C Generator A/D Converter Circuit Circuit Voltage Out of Range
      P1C2A-49 Generator A/D Converter Circuit Internal Electronic Failure
      P1C2B-1C Drive Motor "A" Control Module A/D Converter Circuit Voltage Out of Range
      P1C2B-49 Drive Motor "A" Control Module A/D Converter Circuit Internal Electronic Failure
      P3133-83 Communication Error from Generator to Drive Motor "A" Value of Signal Protection Calculation Incorrect
      P3133-86 Communication Error from Generator to Drive Motor "A" Signal Invalid
      P3133-87 Communication Error from Generator to Drive Motor "A" Missing Message
      P3134-83 Communication Error from Drive Motor "A" to Generator Value of Signal Protection Calculation Incorrect
      P3134-86 Communication Error from Drive Motor "A" to Generator Signal Invalid
      P3134-87 Communication Error from Drive Motor "A" to Generator Missing Message
      Hybrid control system P0A1B-49 Drive Motor "A" Control Module Internal Electronic Failure
      Power source circuit malfunction Motor generator control system P06B0-1C Generator Control Module Position Sensor REF Power Source Circuit Voltage Out of Range
      P06D6-1C Generator Control Module Offset Power Circuit Voltage Out of Range
      Communication malfunction Motor generator control system P3124-87 Lost Communication between Drive Motor "A" and HV ECU Missing Message
      Hybrid control system P3123-87 Lost Communication with Drive Motor Control Module "A" from Hybrid/EV Control Module Missing Message
      Sensor and actuator circuit malfunction Motor generator control system P0A3F-16 Drive Motor "A" Position Sensor Circuit Voltage Below Threshold
      P0A3F-21 Drive Motor "A" Position Sensor Signal Amplitude < Minimum
      P0A3F-22 Drive Motor "A" Position Sensor Signal Amplitude > Maximum
      P0A4B-16 Generator Position Sensor Circuit Voltage Below Threshold
      P0A4B-21 Generator Position Sensor Signal Amplitude < Minimum
      P0A4B-22 Generator Position Sensor Signal Amplitude > Maximum
      P0A60-12 Drive Motor "A" Phase V Current (High Resolution) Circuit Short to Battery
      P0A60-14 Drive Motor "A" Phase V Current (High Resolution) Circuit Short to Ground or Open
      P0A60-1C Drive Motor "A" Phase V Current (High Resolution) Circuit Voltage Out of Range
      P0A63-12 Drive Motor "A" Phase W Current (High Resolution) Circuit Short to Battery
      P0A63-14 Drive Motor "A" Phase W Current (High Resolution) Circuit Short to Ground or Open
      P0A63-1C Drive Motor "A" Phase W Current (High Resolution) Circuit Voltage Out of Range
      P0BE5-12 Drive Motor "A" Phase U Current Sensor Circuit Short to Battery
      P0BE5-14 Drive Motor "A" Phase U Current Sensor Circuit Short to Ground or Open
      P0BE5-28 Drive Motor "A" Phase U Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0BE9-12 Drive Motor "A" Phase V Current Sensor Circuit Short to Battery
      P0BE9-14 Drive Motor "A" Phase V Current Sensor Circuit Short to Ground or Open
      P0BE9-28 Drive Motor "A" Phase V Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0BED-12 Drive Motor "A" Phase W Current Sensor Circuit Short to Battery
      P0BED-14 Drive Motor "A" Phase W Current Sensor Circuit Short to Ground or Open
      P0BED-28 Drive Motor "A" Phase W Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0BFD-62 Drive Motor "A" Phase U-V-W Current Sensor Signal Compare Failure
      P0C50-13 Drive Motor "A" Position Sensor Circuit "A" Circuit Open
      P0C50-16 Drive Motor "A" Position Sensor Circuit "A" Circuit Voltage Below Threshold
      P0C50-17 Drive Motor "A" Position Sensor Circuit "A" Circuit Voltage Above Threshold
      P0C5A-13 Drive Motor "A" Position Sensor Circuit "B" Circuit Open
      P0C5A-16 Drive Motor "A" Position Sensor Circuit "B" Circuit Voltage Below Threshold
      P0C5A-17 Drive Motor "A" Position Sensor Circuit "B" Circuit Voltage Above Threshold
      P0C64-13 Generator Position Sensor Circuit "A" Circuit Open
      P0C64-16 Generator Position Sensor Circuit "A" Circuit Voltage Below Threshold
      P0C64-17 Generator Position Sensor Circuit "A" Circuit Voltage Above Threshold
      P0C69-13 Generator Position Sensor Circuit "B" Circuit Open
      P0C69-16 Generator Position Sensor Circuit "B" Circuit Voltage Below Threshold
      P0C69-17 Generator Position Sensor Circuit "B" Circuit Voltage Above Threshold
      P0D2D-16 Drive Motor "A" Inverter Voltage Sensor (VH) Circuit Voltage Below Threshold
      P0D2D-17 Drive Motor "A" Inverter Voltage Sensor (VH) Circuit Voltage Above Threshold
      P0DFA-62 Generator Phase U-V-W Current Sensor Signal Compare Failure
      P0E00-12 Generator Phase U Current Sensor Circuit Short to Battery
      P0E00-14 Generator Phase U Current Sensor Circuit Short to Ground or Open
      P0E00-28 Generator Phase U Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0E04-12 Generator Phase V Current Sensor Circuit Short to Battery
      P0E04-14 Generator Phase V Current Sensor Circuit Short to Ground or Open
      P0E04-28 Generator Phase V Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0E08-12 Generator Phase W Current Sensor Circuit Short to Battery
      P0E08-14 Generator Phase W Current Sensor Circuit Short to Ground or Open
      P0E08-28 Generator Phase W Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P0E31-16 DC/DC Converter Voltage Sensor "A" (VL) Circuit Voltage Below Threshold
      P0E31-17 DC/DC Converter Voltage Sensor "A" (VL) Circuit Voltage Above Threshold
      P0E51-11 DC/DC Converter Current Sensor Circuit Short to Ground
      P0E51-15 DC/DC Converter Current Sensor Circuit Short to Battery or Open
      P0E51-28 DC/DC Converter Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure
      P1CAC-49 Generator Position Sensor Internal Electronic Failure
      P1CAD-49 Drive Motor "A" Position Sensor Internal Electronic Failure
      P1CAF-38 Generator Position Sensor REF Signal Cycle Malfunction Signal Frequency Incorrect
      P1CB0-38 Drive Motor "A" Position Sensor REF Signal Frequency Incorrect
      P1CFF-62 Hybrid/EV Battery Current/DC/DC Converter Current Signal Compare Failure
      Hybrid control system P0C76-00 Hybrid/EV Battery System Discharge Time Too Long
      P0D2D-1C Drive Motor "A" Inverter Voltage Sensor Voltage Out of Range
      P0E31-1C Boosting Converter Voltage Sensor "A" Voltage Out of Range
      System Malfunction Motor generator control system P0A90-00 Drive Motor "A" Performance
      P0A92-00 Hybrid Generator Performance
      P0BFF-1D Drive Motor "A" Circuit Current Out of Range
      P0C19-00 Drive Motor "A" Execution Torque Performance
      P0CA3-00 DC/DC Converter Step Up Voltage Performance
      P0E71-00 Generator Execution Torque Performance
      P1CA5-1D Hybrid Generator Circuit Current Out of Range
      P3153-1D DC/DC Converter Current Sensor Circuit Current Out of Range
      Hybrid control system P0AA6-49 Hybrid/EV Battery Voltage System Isolation Internal Electronic Failure

      HINT: 

      • P314F-1F may be output as a result of the malfunction indicated by the DTCs above.
        1. The chart above is listed in inspection order of priority.
        2. Check DTCs that are output at the same time by following the listed order. (The main cause of the malfunction can be determined without performing unnecessary inspections.)
    2. Turn the ignition switch off.

    Result: 

    B 

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) 

    Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2019 - 09/2020] , or refer to DIAGNOSTIC TROUBLE CODE CHART [09/2020 - 10/2021] , or refer to DIAGNOSTIC TROUBLE CODE CHART [10/2021 - 11/2023]

    Result: 

    C 

    GO TO DTC CHART (MOTOR GENERATOR CONTROL SYSTEM)  . Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2019 - 10/2021] , or refer to DIAGNOSTIC TROUBLE CODE CHART [10/2021 - 11/2023]

    Result: 

    A 

    See step  2

  2. CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR) 

    Refer to PROCEDURE - Step 3

    Result

    Result Proceed to
    OK A
    NG (The connector is not connected securely.) B
    NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C

    Result: 

    B 

    CONNECT SECURELY 

    Result: 

    C 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    A 

    See step  3

  3. CHECK GENERATOR RESOLVER CIRCUIT 

    Refer to Generator Resolver Circuit [12/2019 - 11/2023]

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  4

  4. CHECK MOTOR RESOLVER CIRCUIT 

    Refer to Motor Resolver Circuit [12/2019 - 11/2023]

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  5

  5. CHECK GENERATOR HIGH-VOLTAGE CIRCUIT 

    Refer to Generator High-voltage Circuit [12/2019 - 11/2023]

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  6

  6. CHECK MOTOR HIGH-VOLTAGE CIRCUIT 

    Refer to Motor High-voltage Circuit [12/2019 - 11/2023]

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  7

  7. CHECK HV BATTERY HIGH-VOLTAGE LINE CIRCUIT 

    Refer to HV Battery High-voltage Line Circuit [12/2019 - 11/2023]

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  8

  8. CHECK INVERTER LOW-VOLTAGE CIRCUIT 

    Refer to Inverter Low-voltage Circuit [12/2019 - 11/2023]

    HINT: 

    If the "Inverter Low-voltage Circuit" inspection results are normal, perform the next step.

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    REPLACE INVERTER WITH CONVERTER ASSEMBLY 

    Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023]

Diesel-Data.com