Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001A0FV
Model Year Start: 2019 Model: Avalon HV Prod Date Range: [04/2018 - 08/2020]
Title: HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P314779; Transmission (Shaft) Mechanical Linkage Failure; 2019 - 2020 MY Avalon HV [04/2018 - 08/2020]

DTC

P314779

Transmission (Shaft) Mechanical Linkage Failure

DTC SUMMARY

Refer to the DTC summary for DTC P1C7779.

Click here 2019 - 2020 MY Avalon HV [04/2018 - 08/2020]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P1C7779; Engine Failed to Start Mechanical Linkage Failure+

DESCRIPTION

Refer to the description for DTC P1C7779.

Click here 2019 - 2020 MY Avalon HV [04/2018 - 08/2020]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P1C7779; Engine Failed to Start Mechanical Linkage Failure+

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P314779

Transmission (Shaft) Mechanical Linkage Failure

Drive force from motor (MG2) or the engine cannot be transmitted to the wheels.

The engine, generator (MG1), motor (MG2) or hybrid vehicle transaxle assembly does not run smoothly due to a mechanical malfunction.

(1 trip detection logic)
  • Hybrid vehicle transaxle assembly
  • Transmission input damper assembly
  • Engine

Does not come on

Master Warning Light:

Comes on

Related Data List

DTC No.

Data List

P314779
  • 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 2019 - 2020 MY Avalon HV [04/2018 - 08/2020]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): UTILITY

  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 5 seconds or more using the engine.
  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:

  • A seized engine, mechanical malfunction of the hybrid vehicle transaxle can be suspected.
  • If this DTC is output, the engine or gears in the transaxle may have seized or foreign matter have been caught in either of them. Therefore, check the engine oil, hybrid transaxle fluid, coolant (for Engine) and coolant (for Inverter) levels.

PROCEDURE

1.

CHECK DTC OUTPUT (ENGINE)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

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

Powertrain > Engine > Trouble Codes

(d) Check for DTCs.

Result

Proceed to

No DTCs are output, or DTCs except the ones in the table below are also output

A

Any of the following DTCs are also output

B

Relevant DTC

P033511

Crankshaft Position Sensor "A" Circuit Short to Ground

P033515

Crankshaft Position Sensor "A" Circuit Short to Battery or Open

P03352A

Crankshaft Position Sensor "A" Signal Stuck in Range

P033531

Crankshaft Position Sensor "A" No Signal

(e) Turn the power switch off.

B

GO TO DTC CHART (SFI SYSTEM) 2019 MY Avalon HV [04/2018 - 08/2019]; A25A-FXS (ENGINE CONTROL): SFI SYSTEM: DIAGNOSTIC TROUBLE CODE CHART 2020 MY Avalon HV [08/2019 - 08/2020]; A25A-FXS (ENGINE CONTROL): SFI SYSTEM: DIAGNOSTIC TROUBLE CODE CHART

A

2.

CHECK CRANKSHAFT PULLEY REVOLUTION (P POSITION)

Click here 2019 - 2020 MY Avalon HV [04/2018 - 08/2020]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P1C7779; Engine Failed to Start Mechanical Linkage Failure+

NG

GO TO STEP 7

OK

3.

CLEAR DTC

Click here 2019 - 2020 MY Avalon HV [04/2018 - 08/2020]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P1C7779; Engine Failed to Start Mechanical Linkage Failure+

NEXT

4.

CHECK ENGINE RACING

Click here 2019 - 2020 MY Avalon HV [04/2018 - 08/2020]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P1C7779; Engine Failed to Start Mechanical Linkage Failure+

NG

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY

OK

5.

CHECK CREEP MOVEMENT

Click here 2019 - 2020 MY Avalon HV [04/2018 - 08/2020]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P1C7779; Engine Failed to Start Mechanical Linkage Failure+

NG

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY

OK

6.

INSPECT ENGINE SPEED

Click here 2019 - 2020 MY Avalon HV [04/2018 - 08/2020]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE 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

B

REPLACE TRANSMISSION INPUT DAMPER ASSEMBLY

7.

CHECK CRANKSHAFT PULLEY REVOLUTION (N POSITION)

Click here 2019 - 2020 MY Avalon HV [04/2018 - 08/2020]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for NICKEL METAL HYDRIDE BATTERY): P1C7779; Engine Failed to Start Mechanical Linkage Failure+

OK

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY

NG

REPAIR OR REPLACE ENGINE