Toyota Avalon (XX50): Transmission (Shaft) Mechanical Linkage Failure (P314779). Parts Location. Pattern Select Switch Eco Mode Circuit

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Engine / Hybrid / Battery Control / Hybrid Control System / Transmission (Shaft) Mechanical Linkage Failure (P314779). Parts Location. Pattern Select Switch Eco Mode Circuit

Transmission (Shaft) Mechanical Linkage Failure (P314779)

DTC SUMMARY

Refer to the DTC summary for DTC P1C7779.

Click here

DESCRIPTION

Refer to the description for DTC P1C7779.

Click here

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

  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)

A

2.

CHECK CRANKSHAFT PULLEY REVOLUTION (P POSITION)

Click here

NG

GO TO STEP 7

OK

3.

CLEAR DTC

Click here

NEXT

4.

CHECK ENGINE RACING

Click here

NG

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY

OK

5.

CHECK CREEP MOVEMENT

Click here

NG

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY

OK

6.

INSPECT ENGINE SPEED

Click here

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

OK

REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY

NG

REPAIR OR REPLACE ENGINE

Parts Location

PARTS LOCATION

ILLUSTRATION

*1

ACCELERATOR PEDAL SENSOR ASSEMBLY

*2

COMBINATION METER ASSEMBLY

*3

AIR CONDITIONING AMPLIFIER ASSEMBLY

*4

SHIFT PADDLE SWITCH (TRANSMISSION SHIFT SWITCH ASSEMBLY)

*5

NO. 3 RELAY BLOCK

- IGCT RELAY

*6

SHIFT POSITION INDICATOR

*7

ELECTRIC PARKING BRAKE SWITCH ASSEMBLY

- EV DRIVE MODE SWITCH

- ECO MODE SWITCH

- NORMAL MODE SWITCH

- SPORT MODE SWITCH

*8

SHIFT LOCK CONTROL UNIT ASSEMBLY

*9

AIRBAG ECU ASSEMBLY

*10

HYBRID VEHICLE CONTROL ECU

*11

NO. 4 RELAY BLOCK

- PCU FUSE

- IGCT NO. 2 FUSE

- PM-IGCT FUSE

- BATT FAN FUSE

- INV W/PMP FUSE

*12

INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

- ECU-B NO. 2 FUSE

- BKUP LP FUSE

- ECU-IG1 NO. 1 FUSE

- ECU-ACC FUSE

- ECU-IG1 NO. 3 FUSE

*13

SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY

*14

DLC3

ILLUSTRATION

*1

ECM

*2

INVERTER WITH CONVERTER ASSEMBLY

*3

COMPRESSOR WITH MOTOR ASSEMBLY

*4

INVERTER WATER PUMP ASSEMBLY

*5

HYBRID VEHICLE TRANSAXLE ASSEMBLY

*6

HV FLOOR UNDER WIRE

*7

HV BATTERY

*8

AUXILIARY BATTERY

*9

FUSIBLE LINK BLOCK ASSEMBLY

- IGCT FUSE

- ECU-B NO. 4 FUSE

*10

NO. 1 ENGINE ROOM RELAY BLOCK AND NO. 1 JUNCTION BLOCK ASSEMBLY

- ECU-IG2 NO. 1 FUSE

- IG2 NO. 1 RELAY

- DC/DC FUSE

- IG2-MAIN FUSE

ILLUSTRATION

*1

INVERTER WITH CONVERTER ASSEMBLY

*2

LOW VOLTAGE CONNECTOR

*3

AIR CONDITIONING WIRE CONNECTION

*4

HV FLOOR UNDER WIRE CONNECTION

*5

MOTOR CABLE CONNECTION

*6

INVERTER COVER

- INTERLOCK

*7

AMD TERMINAL

*8

MOTOR CABLE

*9

HYBRID VEHICLE TRANSAXLE ASSEMBLY

*10

SHIFT LEVER POSITION SENSOR

*11

MOTOR TEMPERATURE SENSOR

- GENERATOR TEMPERATURE SENSOR

*12

MOTOR RESOLVER

- GENERATOR RESOLVER

- TRANSMISSION FLUID TEMPERATURE SENSOR

ILLUSTRATION

*1

SERVICE PLUG GRIP

*2

BATTERY COOLING BLOWER ASSEMBLY

*3

BATTERY VOLTAGE SENSOR

*4

HYBRID BATTERY TERMINAL BLOCK

*5

HV BATTERY JUNCTION BLOCK ASSEMBLY

*6

BATTERY CURRENT SENSOR

*7

SMRB

*8

SMRP

*9

SMRG

*10

SYSTEM MAIN RESISTOR

Pattern Select Switch Eco Mode Circuit

DESCRIPTION

When selecting ECO drive mode, the ECO drive mode switch (electric parking brake switch assembly) operation signal is sent to the air conditioning amplifier assembly. Following this, ECO drive mode control is activated for the heater and air conditioning system and the hybrid vehicle control system.

WIRING DIAGRAM

PROCEDURE

1.

READ VALUE USING TECHSTREAM (CAN BUS CHECK)

Click here

Result

Proceed to

All of the ECUs and sensors that are currently connected to the CAN communication system are displayed

A

None of the ECUs and sensors that are currently connected to the CAN communication system are displayed, or some of them are not displayed

B
B

GO TO CAN COMMUNICATION SYSTEM

A

2.

CHECK DTC OUTPUT (HEALTH CHECK)

Click here

Result

Proceed to

No DTCs are output

A

DTCs are output

B
B

GO TO DTC CHART
A

3.

READ VALUE USING TECHSTREAM (ECO SWITCH)

(a) Connect the Techstream to the DLC3.

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

(c) Enter the following menus: Body Electrical / Air Conditioner / Data List / ECO Switch.

Body Electrical > Air Conditioner > Data List

Tester Display

ECO Switch

(d) Read the value displayed on the Techstream.

Body Electrical > Air Conditioner > Data List

Tester Display

Measurement Item

Range

Normal Condition

ECO Switch

ECO drive mode switch condition

ON or OFF

ECO drive mode switch being pushed and held: ON

ECO drive mode switch not operated: OFF

Result

Proceed to

The Techstream display changes according to the ECO drive mode switch operation

A

The Techstream display does not change according to the ECO drive mode switch operation

B
A

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

B

4.

INSPECT ECO DRIVE MODE SWITCH (ELECTRIC PARKING BRAKE SWITCH ASSEMBLY)

Click here

NG

REPLACE ELECTRIC PARKING BRAKE SWITCH ASSEMBLY

OK

5.

CHECK HARNESS AND CONNECTOR (ECO DRIVE MODE SWITCH (ELECTRIC PARKING BRAKE SWITCH ASSEMBLY) - BODY GROUND)

(a) Disconnect the G24 ECO drive mode switch (electric parking brake switch assembly) connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

G24-16 (GND1) - Body ground

Always

Below 1 Ω

*a

Front view of wire harness connector

(to ECO Drive Mode Switch (Electric Parking Brake Switch Assembly))

(c) Reconnect the G24 ECO drive mode switch (electric parking brake switch assembly) connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

6.

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - ECO DRIVE MODE SWITCH (ELECTRIC PARKING BRAKE SWITCH ASSEMBLY))

(a) Disconnect the G36 air conditioning amplifier assembly connector.

(b) Disconnect the G24 ECO drive mode switch (electric parking brake switch assembly) connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

G36-20 (ECOS) - G24-11 (ECU)

Always

Below 1 Ω

G36-20 (ECOS) or G24-11 (ECU) - Body ground

Always

10 kΩ or higher

*a

Front view of wire harness connector

(to Air Conditioning Amplifier Assembly)

*b

Front view of wire harness connector

(to ECO Drive Mode Switch (Electric Parking Brake Switch Assembly))

(d) Reconnect the G24 ECO drive mode switch (electric parking brake switch assembly) connector.

(e) Reconnect the G36 air conditioning amplifier assembly connector.

OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

Lost Communication with Drive Motor Control Module "A" from Hybrid/EV Control Module Missing Message (P312387)

Pattern Select Switch EV Mode Circuit. Pattern Select Switch Sport Mode Circuit. Precaution

See More:

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Hybrid Control System: Drive Motor "A" Inverter Voltage Sensor Voltage Out of Range (P0D2D1C)
DTC SUMMARY MALFUNCTION DESCRIPTION The hybrid vehicle control ECU detects a VH sensor malfunction. The cause of this malfunction may be one of the following: Inverter voltage sensor internal circuit malfunction Voltage sensor malfunction Motor generator control ECU (MG ECU) malfunction Communicatio ...

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual

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