Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Generator Mechanical Linkage Failure (P1C8779,P1C8879)

Toyota Corolla Cross (2022-2025) Service Manual / Engine & Hybrid System / Hybrid / Battery Control / Hybrid Control System / Generator Mechanical Linkage Failure (P1C8779,P1C8879)

DTC SUMMARY

Refer to the DTC summary for DTC P1C7779.

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DESCRIPTION

Refer to the description for DTC P1C7779.

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DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

Note

P1C8779

Generator Mechanical Linkage Failure

Generator (MG1) locked:

The generator (MG1) does not rotate when the vehicle is being driven in EV drive mode.

(1 trip detection logic)

Hybrid vehicle transaxle assembly

Does not come on

Master Warning:

Comes on

SAE Code:

P3147

P1C8879

Planetary Gear Mechanical Linkage Failure

Planetary gear locked:

The 3 planetary gears rotate all together, not individually.

The planetary gear carrier is seized.

(1 trip detection logic)

Hybrid vehicle transaxle assembly

Does not come on

Master Warning:

Comes on

SAE Code:

P3147

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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DTC P1C8779
  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 and turn the GTS on.
  6. Turn the ignition switch to ON (READY).
  7. Drive the vehicle at approximately 30 km/h (19 mph) or more for approximately 10 seconds or more while maintaining a stable vehicle speed.

    (If generator (MG1) does not rotate in this condition, DTC P1C8779 will be stored.)

  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.
DTC P1C8879
  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 and turn the GTS on.
  6. When the vehicle is stopped, turn the ignition switch to ON (READY) and gradually depress the accelerator pedal so that the engine starts.
  7. Drive the vehicle at approximately 30 km/h (19 mph) or more for approximately 10 seconds or more while maintaining the vehicle speed.
  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.

CAUTION / NOTICE / HINT

HINT:

If this DTC is output, the engine or gears in the transaxle may have seized. Before performing this inspection, check the engine oil, hybrid transaxle fluid, coolant (for Engine) and coolant (for Inverter) levels.

PROCEDURE

1.

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY

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NEXT

END

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