Lexus ES manuals

Lexus ES: Motor/Generator Shutdown Signal (MG Side) Stuck Off (P33BF9F)

Lexus ES (XZ10) Service Manual / Engine & Hybrid System / Hybrid / Battery Control / Hybrid Control System (for Nickel Metal Hydride Battery) / Motor/Generator Shutdown Signal (MG Side) Stuck Off (P33BF9F)

DTC SUMMARY

MALFUNCTION DESCRIPTION

The hybrid vehicle control ECU detects malfunctions which prevent the inverter with converter assembly emergency shutdown circuit (HSDN) from shutting down the hybrid control system. Detection is performed when the power switch is turned on (IG) and during the shutdown sequence when the power switch is turned off. If any of the following condition is detected, this DTC will be stored. If the following conditions are not detected, DTC P321E9F will be stored.

  • Inverter with converter assembly malfunction

DESCRIPTION

Refer to the description for DTC P321E9F.

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DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P33BF9F

Motor/Generator Shutdown Signal (MG Side) Stuck Off

When the HV gate block function check is performed (when the power switch is turned from on (READY) to off), the HSDN (MG shutdown) signal sent from the hybrid vehicle control ECU is received by the motor generator control ECU (MG ECU) but the inverter current and voltage (VH) do not decrease.

(1 trip detection logic)

Inverter with converter assembly

Does not come on

Master Warning Light:

Comes on
Related Data List

DTC No.

Data List

P33BF9F
  • Ready Signal
  • Inverter Emergency Shutdown (Main CPU)
  • Inverter Emergency Shutdown (Sub CPU)

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

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  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 2 minutes or more.
  5. Turn the power switch on (READY) and wait for 30 seconds or more.
  6. Turn the power switch off and wait for 2 minutes or more.
  7. Turn the power switch on (READY) and wait for 30 seconds or more.
  8. Turn the power switch off and wait for 2 minutes or more.
  9. Turn the power switch on (IG) and turn the Techstream on.
  10. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
  11. Check the DTC judgment result.

    HINT:

    • If the judgment result shows NORMAL, the system is normal.
    • If the judgment result shows ABNORMAL, the system has a malfunction.
    • If the judgment result shows INCOMPLETE or N/A, perform driving pattern again.

PROCEDURE

1.

REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS

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NEXT

END

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