HYBRID CONTROL SYSTEM, Diagnostic DTC:P0A94-550, P0A94-564

DTC Code DTC Name
P0A94-550 DC / DC Converter Performance
P0A94-564 DC / DC Converter Performance

DESCRIPTION

For a description of the boost converter Click here.

If a malfunction occurs in the boost converter, the MG ECU detects it and transmits this information to the power management control ECU.

DTC No. INF Code DTC Detection Condition Trouble Area
P0A94 550 Boost converter overvoltage signal detection (circuit malfunction) Inverter with converter assembly
564 Boost converter overvoltage signal detection (circuit malfunction (VL sensor))

MONITOR DESCRIPTION

If the boost converter detects a circuit malfunction, it will transmit a boost converter overvoltage signal to the MG ECU. Upon receiving this signal, the power management control ECU will illuminate the MIL and set a DTC.

MONITOR STRATEGY

Related DTCs

P0A94 (INF 550): OVL detection (Circuit malfunction)

P0A94 (INF 564): OVL detection (Voltage (VL) sensor malfunction)
Required sensors / components Boost converter
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

Power management control ECU DTC P0A94 (INF 550/564) is not detected

CONFIRMATION DRIVING PATTERN

A01HU7ZE02

  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.

  5. Turn the power switch on (IG) and check that there are no abnormalities (abnormal sounds, coolant leaks, DTC output, etc).

  6. Turn the power switch on (READY) and turn the Techstream on. [A]

  7. With the shift lever in P, wait for several seconds.

  8. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes. [B]

  9. Check that permanent DTCs are cleared.

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

Tech Tips


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

  • If no permanent DTC is output, the system is normal.

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.

PROCEDURE


  1. 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 connector connections and contact pressure of the low voltage connectors of the inverter with converter assembly 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.

      A01HVLPE01
      OK
      The connectors are connected securely and there are no contact pressure problems.

      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.


    NG

    CONNECT SECURELY

    OK

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here