Toyota Avalon Service & Repair Manual: Removal

REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed, installed, or replaced during automatic transaxle assembly removal/installation are shown below.

Necessary Procedures After Parts Removed/Installed/Replaced

Replaced Part or Performed Procedure

Necessary Procedure

Effect/Inoperative Function when Necessary Procedure not Performed

Link

Battery terminal is disconnected/reconnected

Perform steering sensor zero point calibration

Lane Departure Alert System (w/ Steering Control)

Pre-collision System

Intelligent Clearance Sonar System*1

Lighting System (for Gasoline Model with Cornering Light)

Memorize steering angle neutral point

Parking Assist Monitor System

Panoramic View Monitor System

Replacement of ECM

Vehicle Identification Number (VIN) registration

MIL comes on

ECU communication ID registration (Immobiliser system)

Engine start function

  • Replacement of engine assembly
  • Gas leak from exhaust system is repaired

Inspection After Repair

  • Poor idle, etc.
  • Engine start function, etc.

Replacement of automatic transaxle assembly

  • Perform reset memory
  • Input transaxle compensation code into ECM
  • Perform road test to allow ECM to learn
  • Large shift shock
  • Deterioration of fuel efficiency

for Initialization

for Registration

Replacement of ECM

(If transaxle compensation code read from ECM)

  • Perform reset memory*2
  • Transfer transaxle compensation code
  • Perform road test to allow ECM to learn

Replacement of ECM

(If transaxle compensation code not read from ECM)

  • Perform reset memory*2
  • Reset transaxle compensation code
  • Perform road test to allow ECM to learn

Replacement of ECM

Code registration (Smart Key System (for Start Function))

  • Wireless Door Lock Control System
  • Smart Key System (for Entry Function)
  • Smart Key System (for Start Function)
  • Steering lock function

Replacement of automatic transaxle fluid

ATF thermal degradation estimate reset

The value of the Data List item "ATF Thermal Degradation Estimate" is not estimated correctly

  • Suspension, tires, etc.

    (If the vehicle height has changed due to suspension or tire replacement)

  • Replacement of front bumper assembly
  • Measure ultrasonic sensor detection angle
  • Ultrasonic sensor detection angle registration
  • Intelligent Clearance Sonar System
  • Intuitive Parking Assist System

Suspension, tires, etc.

(If the vehicle height has changed due to suspension or tire replacement)

Rear television camera assembly optical axis adjustment (Back camera position setting)

Parking Assist Monitor System

for Initialization

for Calibration

Replacement of front bumper assembly

Front television camera view adjustment

Panoramic View Monitor System

for Initialization

for Calibration

Suspension, tires, etc.

(If the vehicle height has changed due to suspension or tire replacement)

  • Parking assist ECU initialization
  • Adjust steering angle
  • Television camera assembly optical axis adjustment (Back camera position setting)

Front wheel alignment adjustment

Perform system variant learning and acceleration sensor zero point calibration.

  • VSC is disabled or malfunctions
  • DTCs are output
  • Slip indicator light illuminates
  • ABS warning light illuminates

  • *1: When performing learning using the Techstream.

    Click here

  • *2: Not necessary when ECM replaced with new one

CAUTION:

  • The engine assembly with transaxle is very heavy. Be sure to follow the procedure described in the repair manual, or the engine lifter may suddenly drop or the engine assembly with transaxle may fall off the engine lifter.

    *a

    An Object Exceeding Weight Limit of Engine Lifter

  • To prevent burns, do not touch the engine, exhaust manifold or other high temperature components while the engine is hot.
  • The automatic transaxle assembly is very heavy. Be sure to follow the procedure described in the repair manual, or the transmission jack may suddenly drop.

    *a

    An Object Exceeding Weight Limit of Transmission Jack

PROCEDURE

1. REMOVE FLYWHEEL HOUSING UNDER COVER

Click here

2. REMOVE DRIVE PLATE AND TORQUE CONVERTER ASSEMBLY SETTING BOLT

(a) Turn the crankshaft to gain access to the 6 drive plate and torque converter assembly setting bolts and remove each drive plate and torque converter assembly setting bolt while holding the crankshaft pulley bolt with a wrench.

HINT:

There will be one black colored drive plate and torque converter assembly setting bolt.

3. REMOVE ENGINE ASSEMBLY WITH TRANSAXLE

Click here

4. DISCONNECT VACUUM HOSE

(a) Disconnect the vacuum hose from the rear engine mounting insulator.

(b) Disconnect the vacuum hose from the intake air surge tank assembly.

(c) Disengage the clamp to disconnect the vacuum hose from the hose clamp.

(d) Disengage the 9 clamps to disconnect the vacuum hose from the automatic transaxle assembly.

5. REMOVE STARTER ASSEMBLY

Click here

6. REMOVE BREATHER PLUG HOSE

(a) Disengage the 3 hose clamps to disconnect the breather plug hose.

(b) Using a screwdriver with its tip wrapped with protective tape, remove the breather plug hose from the No. 1 breather plug (ATM).

NOTICE:

Be careful not to damage the No. 1 breather plug (ATM).

(c) Remove the breather plug sub-assembly from the breather plug hose.

NOTICE:

Be careful not to damage the breather plug sub-assembly.

*1

Breather Plug Sub-assembly

*2

Breather Plug Hose

7. DISCONNECT NO. 1 WATER BY-PASS HOSE

(a) Disengage the 2 clamps to remove the transmission breather clamp.

(b) Slide the clip and disconnect the No. 1 water by-pass hose from the transmission oil cooler.

HINT:

Use a container to catch any coolant which flows out of the No. 1 water by-pass hose and transmission oil cooler.

8. DISCONNECT WATER BY-PASS HOSE ASSEMBLY

(a) Slide the clip and disconnect the water by-pass hose assembly from the transmission oil cooler.

HINT:

Use a container to catch any coolant which flows out of the water by-pass hose assembly and transmission oil cooler.

(b) Disengage the clamp to disconnect the water by-pass hose assembly from the automatic transaxle assembly.

9. DISCONNECT WIRE HARNESS

(a) Disengage the claw, rotate the lever and disconnect the transmission wire connector.

(b) Disconnect the park/neutral position switch assembly connector.

(c) Disengage the wire harness clamp and disconnect the vacuum switching valve (for active control engine mount system) connector.

(d) Remove the 2 bolts.

(e) Remove the bolt.

(f) Disengage the 2 wire harness clamps to disconnect the wire harness.

(g) Remove the 2 bolts.

(h) Disconnect the rack and pinion power steering gear assembly connector.

HINT:

Release the lock before rotating the lock lever.

(i) Remove the 2 bolts to disconnect the wire harness.

(j) Disengage the 3 wire harness clamps to disconnect the wire harness from the automatic transaxle assembly.

10. INSTALL ENGINE HANGERS

Click here

11. REMOVE FRONT FRAME ASSEMBLY

Click here

12. REMOVE FRONT ENGINE MOUNTING BRACKET

(a) Remove the 3 bolts and front engine mounting bracket from the transaxle housing.

13. REMOVE AUTOMATIC TRANSAXLE ASSEMBLY

(a) Support the automatic transaxle assembly with a transmission jack.

NOTICE:

Secure the automatic transaxle assembly to the transmission jack using a suitable adapter, such as a rope or attachment.

(b) Remove the 11 bolts and automatic transaxle assembly.

NOTICE:

To prevent damage to the knock pins, do not pry between the automatic transaxle assembly and engine assembly.

14. REMOVE ENGINE MOUNTING INSULATOR LH

(a) Remove the 5 bolts and engine mounting insulator LH from the automatic transaxle case sub-assembly.

15. REMOVE REAR ENGINE MOUNTING INSULATOR

Click here

16. REMOVE REAR ENGINE MOUNTING BRACKET SUB-ASSEMBLY

(a) Remove the 4 bolts and rear engine mounting bracket sub-assembly from the transaxle housing.

17. DISCONNECT OUTLET NO. 1 OIL COOLER HOSE

Click here

18. DISCONNECT INLET NO. 1 OIL COOLER HOSE

Click here

19. REMOVE NO. 1 OIL COOLER TUBE SUB-ASSEMBLY WITHOUT HOSE

Click here

20. REMOVE TRANSMISSION OIL COOLER

Click here

21. REMOVE AUTOMATIC TRANSMISSION CASE COVER

(a) Remove the 2 clips and automatic transmission case cover from the automatic transaxle case sub-assembly.

22. REMOVE NO. 1 TRANSMISSION CONTROL CABLE BRACKET

(a) Remove the 2 bolts and No. 1 transmission control cable bracket from the automatic transaxle case sub-assembly.

23. REMOVE TRANSMISSION CASE PLUG ASSEMBLY

(a) Remove the transmission case plug assembly from the transaxle housing.

24. REMOVE WIRE HARNESS CLAMP BRACKET

(a) Remove the bolt and wire harness clamp bracket from the automatic transaxle case sub-assembly.

(b) Remove the 2 bolts and 2 wire harness clamp brackets from the automatic transaxle case sub-assembly.

25. REMOVE TORQUE CONVERTER ASSEMBLY

(a) Remove the torque converter assembly from the automatic transaxle assembly.

26. INSPECT TORQUE CONVERTER ASSEMBLY

Click here

27. INSPECT DRIVE PLATE AND RING GEAR SUB-ASSEMBLY

Click here

    Installation

    Automatic Transaxle Fluid

    See More:

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