HYBRID CONTROL SYSTEM, Diagnostic DTC:P0A4B-253, P0A4C-513, P0A4D-255

DTC Code DTC Name
P0A4B-253 Generator Position Sensor Circuit
P0A4C-513 Generator Position Sensor Circuit Range / Performance
P0A4D-255 Generator Position Sensor Circuit Low

DTC SUMMARY

MALFUNCTION DESCRIPTION

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

Area Main Malfunction Description Step
Inverter low-voltage circuit The connectors are not connected properly 2
Generator resolver

  • Open or short circuit in the resolver for generator control

  • Internal generator malfunction (entry of foreign matter, etc.)

 3
Wire harness between the resolver and inverter with converter assembly

  • Open or short circuit in the wire harness

  • The connectors are not connected properly

 3
Inside of inverter Inverter with converter assembly internal circuit malfunction 3

DESCRIPTION

Refer to the system description for the generator resolver circuit Click here.

DTC No. INF Code DTC Detection Condition Trouble Area
P0A4B 253

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
P0A4C 513

Generator resolver signal is out of the normal range (amplitude is too large or too small).

(1 trip detection logic)
P0A4D 255

Open or short in the generator resolver circuit:

Generator resolver signal is out of the normal range (amplitude is extremely small).

(1 trip detection logic)

MONITOR DESCRIPTION

The MG ECU monitors the generator resolver output signal. If the MG ECU detects output signals that are out of the normal range or specification, it will conclude that there is a malfunction of the generator resolver. If a malfunction is detected, the power management control ECU will illuminate the MIL and set a DTC.

MONITOR STRATEGY

Related DTCs

P0A4B (INF 253): Short circuit between phases

P0A4C (INF 513): Range check

P0A4D (INF 255): Circuit discontinuity / short circuit
Required sensors / components Generator resolver
Frequency of operation Continuous
Duration TMC's intellectual property
MIL operation 1 driving cycle
Sequence of operation None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not present TMC's intellectual property
Other conditions belong to TMC's intellectual property -

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property -

COMPONENT OPERATING RANGE

Generator resolver

DTC P0A4B (INF 253) is not detected

DTC P0A4C (INF 513) is not detected

DTC P0A4D (INF 255) is not detected

CONFIRMATION DRIVING PATTERN

A01I3JNE02

  1. Connect the Techstream to the DLC3.

  2. Turn the power switch on (IG) and turn the Techstream 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 30 seconds or more.

  5. Turn the power switch on (IG) and wait for 5 seconds or more.

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

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

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

  9. Drive the vehicle forward with the shift lever in D for 5 m (16 ft.) or more. [A]

  10. Drive the vehicle backward with the shift lever in R for 5 m (16 ft.) or more. [B]

  11. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes. [C]

  12. Read the current DTCs.

    Tech Tips


    • If a current DTC is output, the system is malfunctioning.

    • If current DTCs are not output, check for permanent DTCs.

  13. Check that the permanent DTCs are cleared.

  14. If the permanent DTCs are not cleared, perform the universal trip, and then check for permanent DTCs again.

WIRING DIAGRAM

Refer to the wiring diagram for the generator resolver circuit Click here.

INSPECTION PROCEDURE

CAUTION:


  • Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.

  • 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.

  • After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


    1. Turn the power switch on (IG) and wait for 5 seconds or more.

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

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

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

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

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

  • If DTCs are still output after replacing components of the inverter with converter assembly, replace the inverter with converter assembly.

PROCEDURE


  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.

      Result
      Result Proceed to
      Only P0A4B-253, P0A4C-513 or P0A4D-255 is output, or DTCs other than P0A1B-163, 164, 511 or 512 are output simultaneously A
      P0A1B-163, 164, 511 or 512 is output simultaneously B

    5. Turn the power switch off.


    B

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here

    A

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

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

      Note

      Before disconnecting the connector, confirm that it is properly connected by checking that the locking claws are engaged and that the connector does not pull out.

      A01I3MYE01
      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, insert it with the locking lever in the raised position. Rotate the lever downward and make sure that the connector is pulled into its socket. When the locking lever is in its fully closed position, a click will be heard as its locking claws engage. After the click is heard, pull up on the connector to confirm that it is properly 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.


    NEXT

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here