HYBRID CONTROL SYSTEM, Diagnostic DTC:P0A94-589, P0A94-590

DTC Code DTC Name
P0A94-589 DC / DC Converter Performance
P0A94-590 DC / DC Converter Performance

DESCRIPTION

The MG ECU uses a voltage sensor that is built into the boost converter to detect pre-boost high voltage (VL) to allow boost control. The MG ECU monitors the boost converter voltage sensor signal line and detects the following malfunctions.

DTC No. INF Code DTC Detection Condition Trouble Area
P0A94 589 Open or short to GND in the boost converter voltage (VL) sensor circuit Inverter with converter assembly
590 Short to +B in the boost converter voltage (VL) sensor circuit

MONITOR DESCRIPTION

The MG ECU monitors the boost converter voltage (VL) sensor circuit. If the MG ECU detects an open or short circuit malfunction of the VL sensor circuit, the power management control ECU will illuminate the MIL and set a DTC.

MONITOR STRATEGY

Related DTCs

P0A94 (INF 589): VL malfunction (Disconnection and GND short)

P0A94 (INF 590): VL malfunction (+B short)
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 589/590) is not detected

CONFIRMATION DRIVING PATTERN

A011XPYE01

  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 (READY) and after a few seconds, turn the power switch off. [A]

  6. Repeat [A] 3 times. [B]

  7. Turn the power switch on (IG) and turn the Techstream on.

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

  9. Check that permanent DTCs are cleared.

  10. If the permanent DTCs are not cleared, perform the 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

PROCEDURE

  1. REPLACE INVERTER WITH CONVERTER ASSEMBLY

    Click here

    Tech Tips

    The boost converter voltage (VL) sensor is connected to the MG ECU inside the inverter with converter assembly. If P0A94-589 or P0A94-590 is output, replace the inverter with converter assembly.

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    COMPLETED