MOTOR GENERATOR CONTROL SYSTEM, Diagnostic DTC:P0A4B16, P0A4B1F

Info Added 2017-10-06

DTC Code DTC Name
P0A4B16 Generator Position Sensor Circuit Voltage Below Threshold
P0A4B1F Generator Position Sensor Circuit Intermittent

DTC SUMMARY


  1. MALFUNCTION DESCRIPTION

    These DTCs indicate that the resolver output signal is abnormal. The cause of this malfunction may be one of the following:

    Area Main Malfunction Description
    Inverter low-voltage circuit The connectors are not connected properly
    Hybrid Vehicle Transaxle Assembly

    • Short circuit in the generator control resolver circuit

    • Generator (MG1) internal malfunction (entry of foreign matter, etc.)
    Wire harness between the resolver and inverter with converter assembly

    • Open or short circuit in the wire harness

    • The connectors are not connected properly
    Inside of inverter Inverter with converter assembly internal circuit malfunction

DESCRIPTION

Refer to the system description for the Generator Resolver Circuit.

Click here

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P0A4B16 Generator Position Sensor Circuit Voltage Below Threshold

Interphase short in the generator resolver circuit:

A short circuit between signal lines of generator resolver phases is electrically detected.

(1 trip detection logic)

  • Inverter with converter assembly

  • Hybrid vehicle transaxle assembly

  • Wire harness or connector

 Comes on

Master Warning Light:

Comes on
P0A4B1F Generator Position Sensor Circuit Intermittent

A short circuit between signal lines of generator resolver phases is electrically detected when DTC P0C7917, P0D3319, P1C5D19 or P1C5F19 is stored.

(1 trip detection logic)

  • Inverter with converter assembly

  • Hybrid vehicle transaxle assembly

  • Wire harness or connector

 Does not come on

Master Warning Light:

Does not come on

CONFIRMATION DRIVING PATTERN

Tech Tips

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

Click here


  1. Connect the to the DLC3.

  2. Turn the power switch on (IG) and turn the on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the power switch off and wait for 2 minutes or more.

  5. Turn the power switch on (IG) and turn the on.

  6. With power switch on (IG) and wait for 5 seconds or more.

  7. Turn the power switch on (READY) with the shift lever in P and wait for 5 seconds or more.

  8. Depress the accelerator pedal of the vehicle with the engine stopped and the shift lever in P to start the engine.

  9. Keep the engine running for 5 seconds or more.

  10. Drive the vehicle forward with the shift lever in D for 5 m (16 ft.) or more.

  11. Drive the vehicle backward with the shift lever in R for 5 m (16 ft.) or more.

  12. Enter the following menus: Powertrain / Motor Generator / Utility / All Readiness.

  13. Check the DTC judgment result.

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform driving pattern again.

WIRING DIAGRAM

Refer to the wiring diagram for the Generator Resolver Circuit.

Click here

CAUTION / NOTICE / HINT

CAUTION:


  • B0048QQ

    Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grip from HV battery.


    • Inspecting the high-voltage system

    • Disconnecting the low voltage connector of the inverter with converter assembly

    • Disconnecting the low voltage connector of the HV battery

  • A005NJP

    To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.

  • A005NAH

    After removing the service plug grip from the HV battery, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.

  • B0048M5C01
    *a Without waiting for 10 minutes

    After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.

    Click here

    Tech Tips

    Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

Note

After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work. Click here

Tech Tips


  • If the problem symptom cannot be reproduced, performing a road test on a road on which the vehicle tends to vibrate will make it easier to reproduce the symptom.

  • If the resolver is malfunctioning, the vehicle may not drive smoothly.

  • When inspecting the connectors, if it is difficult to judge if a connector was disconnected, deformed or improperly secured, disconnect and reconnect the connector and then check for DTCs again. Check if the same DTC is output. If the same DTC is not output, improper connection of connectors is suspected.

  • As a malfunction detection threshold may be exceeded when performing the vibration or heat connector inspections, make sure to perform the following inspection to check that the DTC was not stored due to the malfunction of a part.

PROCEDURE


  1. CHECK DTC OUTPUT


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control and Motor Generator / Trouble Codes.

    4. Check for DTCs.


      Powertrain > Hybrid Control > Trouble Codes
      Powertrain > Motor Generator > Trouble Codes
      Result
      Result Proceed to
      P0A4B16 or P0A4B1F only is output, or DTCs except the ones in the table 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 P1C7C49 Hybrid/EV Battery Voltage System (A/C Area) Insulation Resistance Decreased
      P1C7D49 Hybrid/EV Battery Voltage System (Hybrid/EV Battery Area) Insulation Resistance Decreased
      P1C7E49 Hybrid/EV Battery Voltage System (Transaxle Area) Insulation Resistance Decreased
      P1C7F49 Hybrid/EV Battery Voltage System (Direct Current Area) Insulation Resistance Decreased
      Table 2
      Malfunction Content System Relevant DTC
      Power source circuit malfunction Motor generator control system P06B01C Generator Control Module Position Sensor REF Power Source Circuit Voltage Out of Range
      P06D61C Generator Control Module Offset Power Circuit Voltage Out of Range

      Tech Tips


      • P0A4B16 or P0A4B1F may be output as a result of the malfunctions 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.)

    5. Turn the power switch off.


    B

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here

    C

    GO TO DTC CHART (MOTOR GENERATOR CONTROL SYSTEM) Click here

    A

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

    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

    CAUTION:

    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 repair manual because this may cause a malfunction.

    2. A005MZX

      Check the connection condition of the low voltage connectors of the inverter with converter assembly and the contact pressure of each terminal. Check the terminals for deformation, and the connector for water and foreign matter.

      Click here

      Note

      Before disconnecting the connector, confirm that it is properly connected by checking that the claws of the lock levers are engaged and that the connector cannot be pulled off.

      OK
      - The connector is connected securely.
      - The terminals are not deformed and are connected securely.
      - No water or foreign matter in the connector.
      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

      Tech Tips

      When connecting the connector, connect it with the lock levers raised. Rotate each lock lever downward and make sure that the connector is securely connected. When a lock lever is fully lowered, a click will be heard as its claw engages. After the click is heard, pull up on the connector to confirm that it is securely connected.


    B

    CONNECT SECURELY

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

  3. CHECK GENERATOR RESOLVER CIRCUIT

    Click here

    Tech Tips

    If the "Generator Resolver Circuit" inspection results are normal, perform the next step.

    Result
    Proceed to
    NEXT

    NEXT

    REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS Click here