HYBRID CONTROL SYSTEM, Diagnostic DTC:P0A94-585

DTC Code DTC Name
P0A94-585 DC / DC Converter Performance

DTC SUMMARY

MALFUNCTION DESCRIPTION

The power management control ECU detects a VL sensor malfunction.

The cause of this malfunction may be one of the following:


  1. A VH sensor, VL sensor or VB sensor circuit malfunction


    • Voltage sensor malfunction

    • Motor generator control ECU malfunction

    • Communication (wire harness) malfunction

  2. High voltage system malfunction


    • Inverter with converter assembly malfunction

DESCRIPTION

Refer to the description for DTC P0A94-589 Click here.

DTC No. INF Code DTC Detection Condition Trouble Area
P0A94 585

Boost converter voltage (VL) sensor performance malfunction:

When not boosting, differences between "VL-Voltage before Boosting" and "Power Resource VB", and "VL-Voltage before Boosting" and "VH-Voltage after Boosting" are large.

(1 trip detection logic)

 Inverter with converter assembly
Related Data List
DTC No. Data List
P0A94-585

  • VL-Voltage before Boosting

  • Power Resource VB

  • VH-Voltage after Boosting

  • Boost Ratio

MONITOR DESCRIPTION

The power management control ECU monitors the boost converter voltage sensor signal. If the power management control ECU detects an abnormality in the sensor signal, the power management control ECU will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs P0A94 (INF 585): Voltage (VL) sensor deviation
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 585) is not detected

CONFIRMATION DRIVING PATTERN


  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 turn the Techstream on.

  6. Turn the power switch on (READY).

  7. With the shift lever in D, depress both the accelerator pedal and brake pedal at the same time to raise the SOC to a sufficient level.

  8. Move the shift lever to P, check that the engine is stopped and move the shift lever to N.

  9. Set the A/C for maximum cooling.

  10. Leave the vehicle for a few minutes.

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

  12. 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.

  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.

INSPECTION PROCEDURE

Tech Tips

When the accelerator pedal is not depressed with the power switch on (READY) and the shift lever in P, if "VH-Voltage after Boosting" and the "Power Resource VB" is approximately same after repair, the condition is judged as normal.

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 if DTCs are output.

      Result
      Result Proceed to
      P0A94-585 only is output, or DTCs except the ones in the tables below are also output. A
      DTCs shown in Table 1 are output simultaneously. B
      DTCs shown in Table 2 are output simultaneously. C
      Table 1
      Malfunction Content Relevant DTC
      Microcomputer malfunction P0A1A-151, 155, 156, 658, 659 Generator Control Module
      P0A1B-164, 193, 512, 661, 786 Drive Motor "A" Control Module
      P0A1D-148 Hybrid Powertrain Control Module
      P324E-788 MG-ECU Power Relay Intermittent Circuit
      Power source circuit malfunction P2511-149 ECM/PCM Power Relay Sensor Circuit Intermittent
      Communication system malfunction U0110 (all INF codes)*1 Lost Communication with Drive Motor Control Module "A"
      Sensor and actuator circuit malfunction P0A78-266, 267 Drive Motor "A" Inverter Performance
      P0A94-589, 590 DC/DC Converter Performance
      Table 2
      Malfunction Content Relevant DTC
      Microcomputer malfunction P0AFC-123 Hybrid Battery Pack Sensor Module
      Sensor and actuator malfunction P0B3D-123 Hybrid Battery Voltage Sensor "A" Circuit Low
      P0B42-123 Hybrid Battery Voltage Sensor "B" Circuit Low
      P0B47-123 Hybrid Battery Voltage Sensor "C" Circuit Low
      P0B4C-123 Hybrid Battery Voltage Sensor "D" Circuit Low
      P0B51-123 Hybrid Battery Voltage Sensor "E" Circuit Low
      P0B56-123 Hybrid Battery Voltage Sensor "F" Circuit Low
      P0B5B-123 Hybrid Battery Voltage Sensor "G" Circuit Low
      P0B60-123 Hybrid Battery Voltage Sensor "H" Circuit Low
      P0B65-123 Hybrid Battery Voltage Sensor "I" Circuit Low
      P0B6A-123 Hybrid Battery Voltage Sensor "J" Circuit Low
      P0B6F-123 Hybrid Battery Voltage Sensor "K" Circuit Low
      P0B74-123 Hybrid Battery Voltage Sensor "L" Circuit Low
      P0B79-123 Hybrid Battery Voltage Sensor "M" Circuit Low
      P0B7E-123 Hybrid Battery Voltage Sensor "N" Circuit Low
      P0B83-123 Hybrid Battery Voltage Sensor "O" Circuit Low
      P0B88-123 Hybrid Battery Voltage Sensor "P" Circuit Low
      P0B8D-123 Hybrid Battery Voltage Sensor "Q" Circuit Low
      P0B92-123 Hybrid Battery Voltage Sensor "R" Circuit Low
      P308A-123 Hybrid Battery Voltage Sensor ALL Circuit Low

      Tech Tips


      • *1: If any INF codes are output for this DTC, refer to the corresponding diagnostic procedure.

      • P0A94-585 may be output as a result of the malfunction 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 (HYBRID BATTERY SYSTEM) Click here

    A

    REPLACE INVERTER WITH CONVERTER ASSEMBLY Click here