Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001PSCU
Model Year Start: 2021 Model: Avalon Prod Date Range: [08/2020 -           ]
Title: UB80F (AUTOMATIC TRANSMISSION / TRANSAXLE): OIL COOLER: REMOVAL; 2021 - 2022 MY Avalon [08/2020 -        ]

REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during transmission oil cooler 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
*1: When performing learning using the Techstream.

Click here 2019 - 2022 MY Avalon [04/2018 -        ]; PARK ASSIST / MONITORING: INTELLIGENT CLEARANCE SONAR SYSTEM (for Gasoline Model): CALIBRATION

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

Battery terminal is disconnected/reconnected

Perform steering sensor zero point calibration

Lane Departure Alert System (w/ Steering Control)

2019 - 2021 MY Avalon [04/2018 - 08/2021]; PRE-COLLISION: PRE-COLLISION SYSTEM (for Gasoline Model): INITIALIZATION 2022 MY Avalon Avalon HV [08/2021 -        ]; PRE-COLLISION: PRE-COLLISION SYSTEM: INITIALIZATION

Pre-collision System

Intelligent Clearance Sonar System*1

Lighting System (for HV Model with Cornering Light)

Memorize steering angle neutral point

Parking Assist Monitor System

2019 - 2022 MY Avalon [04/2018 -        ]; PARK ASSIST / MONITORING: PARKING ASSIST MONITOR SYSTEM (for Gasoline Model): INITIALIZATION

Panoramic View Monitor System

2019 - 2022 MY Avalon [04/2018 -        ]; PARK ASSIST / MONITORING: PANORAMIC VIEW MONITOR SYSTEM (for Gasoline Model): INITIALIZATION

Replacement of ECM

Vehicle Identification Number (VIN) registration

MIL comes on

2021 - 2022 MY Avalon [08/2020 -        ]; A25A-FKS (ENGINE CONTROL): SFI SYSTEM: REGISTRATION

ECU communication ID registration (Immobiliser system)

Engine start function

2021 - 2022 MY Avalon [08/2020 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION

Code registration (Smart Key System (for Start Function, Gasoline Model))
  • Wireless Door Lock Control System
  • Smart Key System (for Entry Function, Gasoline Model)
  • Smart Key System (for Start Function, Gasoline Model)
  • Steering lock function

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
  • Large shift shock
  • Deterioration of fuel efficiency

2021 - 2022 MY Avalon [08/2020 -        ]; UB80F (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: INITIALIZATION for UB80F Initialization

2021 - 2022 MY Avalon [08/2020 -        ]; UB80F (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: REGISTRATION for UB80F Registration

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 automatic transaxle fluid

ATF thermal degradation estimate reset

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

2021 - 2022 MY Avalon [08/2020 -        ]; UB80F (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: INITIALIZATION

PROCEDURE

1. REMOVE BATTERY

Click here 2021 - 2022 MY Avalon [08/2020 -        ]; MAINTENANCE: A25A-FKS BATTERY: REMOVAL

2. REMOVE ECM

Click here 2021 - 2022 MY Avalon [08/2020 -        ]; A25A-FKS (ENGINE CONTROL): ECM: REMOVAL

3. REMOVE BATTERY CLAMP SUB-ASSEMBLY

Click here 2021 - 2022 MY Avalon [08/2020 -        ]; A25A-FKS (ENGINE MECHANICAL): ENGINE ASSEMBLY: REMOVAL+

4. REMOVE FRONT WHEEL LH

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; MAINTENANCE: TIRE AND WHEEL: REMOVAL

5. REMOVE FRONT WHEEL OPENING EXTENSION PAD LH

Click here 2021 - 2022 MY Avalon [08/2020 -        ]; A25A-FKS (ENGINE MECHANICAL): ENGINE ASSEMBLY: REMOVAL+

6. REMOVE FRONT WHEEL OPENING EXTENSION PAD RH

Click here 2021 - 2022 MY Avalon [08/2020 -        ]; A25A-FKS (ENGINE MECHANICAL): ENGINE ASSEMBLY: REMOVAL+

7. REMOVE NO. 1 ENGINE UNDER COVER

Click here 2021 - 2022 MY Avalon [08/2020 -        ]; A25A-FKS (ENGINE MECHANICAL): ENGINE ASSEMBLY: REMOVAL+

8. REMOVE NO. 2 ENGINE UNDER COVER ASSEMBLY

Click here 2021 - 2022 MY Avalon [08/2020 -        ]; A25A-FKS (ENGINE MECHANICAL): ENGINE ASSEMBLY: REMOVAL+

9. REMOVE FRONT FENDER APRON SEAL LH

Click here 2021 - 2022 MY Avalon [08/2020 -        ]; A25A-FKS (ENGINE MECHANICAL): ENGINE ASSEMBLY: REMOVAL+

10. DRAIN ENGINE COOLANT

Click here 2021 - 2022 MY Avalon [08/2020 -        ]; MAINTENANCE: A25A-FKS COOLANT: REPLACEMENT+

11. DRAIN AUTOMATIC TRANSAXLE FLUID

Click here 2021 - 2022 MY Avalon [08/2020 -        ]; UB80F (AUTOMATIC TRANSMISSION / TRANSAXLE): TRANSMISSION WIRE: REMOVAL+

12. DISCONNECT OUTLET NO. 1 OIL COOLER HOSE

(a) Slide the clip and disconnect the outlet No. 1 oil cooler hose from the oil cooler union sub-assembly.

HINT:

Use a container to catch any automatic transaxle fluid which flows out of the outlet No. 1 oil cooler hose and oil cooler union sub-assembly.

13. DISCONNECT INLET NO. 1 OIL COOLER HOSE

(a) Slide the clip and disconnect the inlet No. 1 oil cooler hose from the No. 1 oil cooler outlet tube sub-assembly.

HINT:

Use a container to catch any automatic transaxle fluid which flows out of the inlet No. 1 oil cooler hose and No. 1 oil cooler outlet tube sub-assembly.

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

(a) Remove the 2 bolts to disconnect the No. 1 oil cooler tube sub-assembly without hose from the automatic transaxle case sub-assembly.

(b) Slide the clip and disconnect the inlet No. 2 oil cooler hose from the transmission oil cooler.

HINT:

Use a container to catch any automatic transaxle fluid which flows out of the inlet No. 2 oil cooler hose and transmission oil cooler.

(c) Slide the clip and disconnect the outlet No. 2 oil cooler hose to remove the No. 1 oil cooler tube sub-assembly without hose from the transmission oil cooler.

HINT:

Use a container to catch any automatic transaxle fluid which flows out of the outlet No. 2 oil cooler hose and transmission oil cooler.

(d) Slide the 4 clips and remove the inlet No. 1 oil cooler hose, inlet No. 2 oil cooler hose, outlet No. 1 oil cooler hose and outlet No. 2 oil cooler hose from the No. 1 oil cooler tube sub-assembly without hose.

*1

No. 1 Oil Cooler Tube Sub-assembly without Hose

*2

Inlet No. 1 Oil Cooler Hose

*3

Inlet No. 2 Oil Cooler Hose

*4

Outlet No. 1 Oil Cooler Hose

*5

Outlet No. 2 Oil Cooler Hose

15. DISCONNECT NO. 1 WATER BY-PASS HOSE

(a) Disengage the 3 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.

16. 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.

17. REMOVE TRANSMISSION OIL COOLER

(a) Remove the 3 bolts and transmission oil cooler from the automatic transaxle case sub-assembly.

HINT:

Use a container to catch any coolant and automatic transaxle fluid which flow out of the transmission oil cooler.