Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001OBB7
Model Year Start: 2020 Model: RAV4 HV Prod Date Range: [06/2020 -           ]
Title: HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY): P1C8679; Transmission (Input) Mechanical Linkage Failure; 2020 - 2024 MY RAV4 HV [06/2020 -        ]

DTC

P1C8679

Transmission (Input) Mechanical Linkage Failure

DTC SUMMARY

Refer to the DTC summary for DTC P1C7779.

Click here 2020 - 2024 MY RAV4 HV [06/2020 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY): P1C7779; Engine Failed to Start Mechanical Linkage Failure+

DESCRIPTION

Refer to the description for DTC P1C7779.

Click here 2020 - 2024 MY RAV4 HV [06/2020 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY): P1C7779; Engine Failed to Start Mechanical Linkage Failure+

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P1C8679

Transmission (Input) Mechanical Linkage Failure

Hybrid vehicle transaxle malfunction (input system lock):

When the vehicle is stopped, an engine cranking signal is sent but the generator (MG1) does not rotate.

The generator (MG1) or the engine does not rotate, or the planetary gear unit is malfunctioning.

(1 trip detection logic)

  • Hybrid vehicle transaxle assembly
  • Transmission input damper assembly
  • Engine

Does not come on

Master Warning:

Comes on

Related Data List

DTC No.

Data List

P1C8679

  • Generator Revolution
  • Motor Revolution
  • Engine Speed

CONFIRMATION DRIVING PATTERN

HINT:

After repair has 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 2020 - 2024 MY RAV4 HV [06/2020 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY): UTILITY

  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON and turn the Techstream 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 Techstream on.
  6. With the vehicle stopped and the shift lever in P, turn the ignition switch to ON (READY) and gradually depress the accelerator pedal so that the engine starts.
  7. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
  8. 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:

  • Engine lock or a mechanical malfunction has occurred inside the hybrid vehicle transaxle assembly.
  • 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.

CHECK DTC OUTPUT (HYBRID CONTROL)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

Powertrain > Hybrid Control > Trouble Codes

(d) Check for DTCs.

Result

Proceed to

P1C8679 only is output, or DTCs except the ones in the table below are also output.

A

Any of the following DTCs including pending DTCs are also output.

B

Malfunction Content

Relevant DTC

Sensor and actuator circuit malfunction

P1C8779

Generator Mechanical Linkage Failure

P1C8879

Planetary Gear Mechanical Linkage Failure

HINT:

P1C8679 may be output as a result of the malfunction indicated by the DTCs above.

(e) Turn the ignition switch off.

B

GO TO DTC CHART (HYBRID CONTROL SYSTEM) 2020 - 2021 MY RAV4 HV [06/2020 - 12/2021]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY): DIAGNOSTIC TROUBLE CODE CHART 2022 - 2024 MY RAV4 HV [12/2021 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY): DIAGNOSTIC TROUBLE CODE CHART

A

2.

CHECK CRANKSHAFT PULLEY REVOLUTION (P POSITION)

Click here 2020 - 2024 MY RAV4 HV [06/2020 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY): P1C7779; Engine Failed to Start Mechanical Linkage Failure+

NG

GO TO STEP 7

OK

3.

CLEAR DTC

Click here 2020 - 2024 MY RAV4 HV [06/2020 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY): P1C7779; Engine Failed to Start Mechanical Linkage Failure+

NEXT

4.

CHECK ENGINE RACING

Click here 2020 - 2024 MY RAV4 HV [06/2020 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY): P1C7779; Engine Failed to Start Mechanical Linkage Failure+

NG

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY 2020 MY RAV4 HV [06/2020 - 08/2020]; P710 (HYBRID TRANSMISSION / TRANSAXLE): HYBRID VEHICLE TRANSAXLE: REMOVAL 2021 MY RAV4 HV [08/2020 - 12/2021]; P710 (HYBRID TRANSMISSION / TRANSAXLE): HYBRID VEHICLE TRANSAXLE: REMOVAL 2022 MY RAV4 HV [12/2021 - 10/2022]; P710 (HYBRID TRANSMISSION / TRANSAXLE): HYBRID VEHICLE TRANSAXLE: REMOVAL 2023 MY RAV4 HV [10/2022 - 10/2023]; P710 (HYBRID TRANSMISSION / TRANSAXLE): HYBRID VEHICLE TRANSAXLE: REMOVAL 2024 MY RAV4 HV [10/2023 -        ]; P710 (HYBRID TRANSMISSION / TRANSAXLE): HYBRID VEHICLE TRANSAXLE: REMOVAL

OK

5.

CHECK CREEP MOVEMENT

Click here 2020 - 2024 MY RAV4 HV [06/2020 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY): P1C7779; Engine Failed to Start Mechanical Linkage Failure+

NG

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY 2020 MY RAV4 HV [06/2020 - 08/2020]; P710 (HYBRID TRANSMISSION / TRANSAXLE): HYBRID VEHICLE TRANSAXLE: REMOVAL 2021 MY RAV4 HV [08/2020 - 12/2021]; P710 (HYBRID TRANSMISSION / TRANSAXLE): HYBRID VEHICLE TRANSAXLE: REMOVAL 2022 MY RAV4 HV [12/2021 - 10/2022]; P710 (HYBRID TRANSMISSION / TRANSAXLE): HYBRID VEHICLE TRANSAXLE: REMOVAL 2023 MY RAV4 HV [10/2022 - 10/2023]; P710 (HYBRID TRANSMISSION / TRANSAXLE): HYBRID VEHICLE TRANSAXLE: REMOVAL 2024 MY RAV4 HV [10/2023 -        ]; P710 (HYBRID TRANSMISSION / TRANSAXLE): HYBRID VEHICLE TRANSAXLE: REMOVAL

OK

6.

INSPECT ENGINE SPEED

Click here 2020 - 2024 MY RAV4 HV [06/2020 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY): P1C7779; Engine Failed to Start Mechanical Linkage Failure+

Result

Proceed to

The absolute value of the difference is less than 500 rpm.

A

The absolute value of the difference is 500 rpm or more continuously for 1 second.

B

A

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY 2020 MY RAV4 HV [06/2020 - 08/2020]; P710 (HYBRID TRANSMISSION / TRANSAXLE): HYBRID VEHICLE TRANSAXLE: REMOVAL 2021 MY RAV4 HV [08/2020 - 12/2021]; P710 (HYBRID TRANSMISSION / TRANSAXLE): HYBRID VEHICLE TRANSAXLE: REMOVAL 2022 MY RAV4 HV [12/2021 - 10/2022]; P710 (HYBRID TRANSMISSION / TRANSAXLE): HYBRID VEHICLE TRANSAXLE: REMOVAL 2023 MY RAV4 HV [10/2022 - 10/2023]; P710 (HYBRID TRANSMISSION / TRANSAXLE): HYBRID VEHICLE TRANSAXLE: REMOVAL 2024 MY RAV4 HV [10/2023 -        ]; P710 (HYBRID TRANSMISSION / TRANSAXLE): HYBRID VEHICLE TRANSAXLE: REMOVAL

B

REPLACE TRANSMISSION INPUT DAMPER ASSEMBLY 2020 MY RAV4 HV [10/2019 - 08/2020]; A25A-FXS (ENGINE MECHANICAL): REAR CRANKSHAFT OIL SEAL: REMOVAL 2021 MY RAV4 HV [08/2020 - 12/2021]; A25A-FXS (ENGINE MECHANICAL): REAR CRANKSHAFT OIL SEAL: REMOVAL 2022 MY RAV4 HV [12/2021 - 10/2022]; A25A-FXS (ENGINE MECHANICAL): REAR CRANKSHAFT OIL SEAL: REMOVAL 2023 MY RAV4 HV [10/2022 - 10/2023]; A25A-FXS (ENGINE MECHANICAL): REAR CRANKSHAFT OIL SEAL: REMOVAL 2024 MY RAV4 HV [10/2023 -        ]; A25A-FXS (ENGINE MECHANICAL): REAR CRANKSHAFT OIL SEAL: REMOVAL

7.

CHECK CRANKSHAFT PULLEY REVOLUTION (N POSITION)

Click here 2020 - 2024 MY RAV4 HV [06/2020 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY): P1C7779; Engine Failed to Start Mechanical Linkage Failure+

OK

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY 2020 MY RAV4 HV [06/2020 - 08/2020]; P710 (HYBRID TRANSMISSION / TRANSAXLE): HYBRID VEHICLE TRANSAXLE: REMOVAL 2021 MY RAV4 HV [08/2020 - 12/2021]; P710 (HYBRID TRANSMISSION / TRANSAXLE): HYBRID VEHICLE TRANSAXLE: REMOVAL 2022 MY RAV4 HV [12/2021 - 10/2022]; P710 (HYBRID TRANSMISSION / TRANSAXLE): HYBRID VEHICLE TRANSAXLE: REMOVAL 2023 MY RAV4 HV [10/2022 - 10/2023]; P710 (HYBRID TRANSMISSION / TRANSAXLE): HYBRID VEHICLE TRANSAXLE: REMOVAL 2024 MY RAV4 HV [10/2023 -        ]; P710 (HYBRID TRANSMISSION / TRANSAXLE): HYBRID VEHICLE TRANSAXLE: REMOVAL

NG

REPAIR OR REPLACE ENGINE