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, which is built into the inverter with converter assembly, detects pre-boosting high voltage (VL) using the voltage sensor in the boost converter to control boosting. The MG ECU also monitors the boost converter voltage sensor signal line and detects malfunctions.

DTC No. INF Code DTC Detection Condition Trouble Area
P0A94 589

Boost converter voltage (VL) signal is stuck (Low)

(1 trip detection logic)

 Inverter with converter assembly
590

Boost converter voltage (VL) signal is stuck (High)

(1 trip detection logic)
Result
Result Proceed to
P0A94-589 VL-Voltage before Boosting
P0A94-590

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 store 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

A01I2HFE20

  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 after 5 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. Read the current DTCs.

    Tech Tips


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

    • If current DTCs are not output, perform the following steps to check for permanent DTCs.

  10. Check that the permanent DTCs are cleared.

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

INSPECTION PROCEDURE

Tech Tips

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.

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