Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Motor/Generator Shutdown Signal (Hybrid/EV Side) Stuck Off (P33B99F)

Toyota Corolla Cross (2022-2025) Service Manual / Engine & Hybrid System / Hybrid / Battery Control / Hybrid Control System / Motor/Generator Shutdown Signal (Hybrid/EV Side) Stuck Off (P33B99F)

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 ignition switch is turned to ON and during the shutdown sequence when the ignition switch is turned off. If the following condition is detected, this DTC will be stored. If the following condition is not detected, DTC P321E9F will be stored.

  • Hybrid vehicle control ECU 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

Note

P33B99F

Motor/Generator Shutdown Signal (Hybrid/EV Side) Stuck Off

When the HV gate shutdown function check is performed (when the ignition switch is turned from ON (READY) to off) and checked at the motor generator control ECU (MG ECU), the shutdown signals sent by the main CPU and sub CPU of the hybrid vehicle control ECU do not match.

(1 trip detection logic)

Hybrid vehicle control ECU

Does not come on

Master Warning:

Comes on

SAE Code:

P33B9

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 GTS to the DLC3.
  2. Turn the ignition switch to ON and turn the GTS on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  4. Turn the ignition switch off and wait for 2 minutes or more.
  5. Turn the ignition switch to ON (READY) and wait for 30 seconds or more.
  6. Turn the ignition switch off and wait for 2 minutes or more.
  7. Turn the ignition switch to ON (READY) and wait for 30 seconds or more.
  8. Turn the ignition switch off and wait for 2 minutes or more.
  9. Turn the ignition switch to ON and turn the GTS 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, perform driving pattern again.

PROCEDURE

1.

REPLACE HYBRID VEHICLE CONTROL ECU

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NEXT

END

    READ NEXT:

     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 hybr

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