Lexus ES manuals

Lexus ES: Generator Mechanical Linkage Failure (P1C8779,P1C8879)

Lexus ES (XZ10) Service Manual / Engine & Hybrid System / Hybrid / Battery Control / Hybrid Control System (for Lithium-ion Battery) / 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

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 Light:

Comes on

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 Light:

Comes on
Related Data List

DTC No.

Data List

P1C8779
  • Generator Revolution
  • Motor Revolution
  • Engine Speed

P1C8879

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 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 (IG) and turn the Techstream on.
  6. Turn the power switch 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 or N/A, perform driving pattern again.
DTC P1C8879
  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 (IG) and turn the Techstream on.
  6. When the vehicle is stopped, turn the power switch 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 or N/A, 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

Click here

NEXT

END

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