Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Rear Motor Shutdown Stuck Off (P1C6B9F)

Toyota Corolla Cross (2022-2024) Service Manual / Engine & Hybrid System / Hybrid / Battery Control / Hybrid Control System / Rear Motor Shutdown Stuck Off (P1C6B9F)

DTC SUMMARY

MALFUNCTION DESCRIPTION

The hybrid vehicle control ECU detects malfunctions which prevent the rear motor (MGR) inverter shutdown circuit shutting down the hybrid vehicle control system. Detection is performed during the shutdown sequence when the ignition switch is turned off. If rear motor (MGR) inverter operation is detected after a shutdown signal was sent to the rear motor (MGR) inverter, the hybrid vehicle control ECU will determine that there is a malfunction and store this DTC.

The cause of this malfunction may be the following:

Inverter with converter assembly SDWN (MGR) internal circuit malfunction
  • Inverter with converter assembly malfunction

DESCRIPTION

The motor generator control ECU (MG ECU) sends shutdown signals to the inverter to cut the power supply to the generator (MG1), motor (MG2) and rear motor (MGR). If the ignition switch is turned off, the motor generator control ECU (MG ECU) will send a GSDN (MG1 shutdown signal) signal, MSDN (MG2 shutdown signal) signal and SDNR (MGR shutdown signal) signal to check the function of the HV gate block. If a shutdown malfunction is detected, this DTC will be stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

Note

P1C6B9F

Rear Motor Shutdown Stuck Off

When the HV gate block function check is performed (when the ignition switch is turned from ON (READY) to off), the SDNR (MGR shutdown signal) signal is sent but the motor (MGR) inverter current and voltage (VH) do not decrease.

(1 trip detection logic)

Inverter with converter assembly

Does not come on

Master Warning: Comes on

SAE Code:

P1C6B

CONFIRMATION DRIVING PATTERN

HINT:

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

Click here

  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 and turn the GTS on.
  8. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
  9. 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 INVERTER WITH CONVERTER ASSEMBLY

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NEXT

END

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