Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001PSCS
Model Year Start: 2021 Model: Avalon Prod Date Range: [08/2020 -           ]
Title: UB80F (AUTOMATIC TRANSMISSION / TRANSAXLE): PARK / NEUTRAL POSITION SWITCH: 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 park/neutral position switch 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
*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

NOTICE:

Before removing the park/neutral position switch assembly, check that the shift lever is in N.

PROCEDURE

1. SECURE VEHICLE

(a) Fully apply the parking brake and chock a wheel.

CAUTION:

  • Make sure to apply the parking brake and chock a wheel before performing this procedure.
  • If the vehicle is not secure and the shift lever is moved to N, the vehicle may suddenly move, possibly resulting in an accident or serious injury.

2. REMOVE BATTERY

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

3. REMOVE ECM

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

4. REMOVE BATTERY CLAMP SUB-ASSEMBLY

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

5. DISCONNECT TRANSMISSION CONTROL CABLE ASSEMBLY

(a) While disengaging the clip as shown in the illustration, disconnect the transmission control cable assembly from the transmission control shaft lever together with the clip.

*a

Clip

*b

45° to 60°

6. REMOVE PARK/NEUTRAL POSITION SWITCH ASSEMBLY

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

(b) Remove the nut, washer and transmission control shaft lever from the manual valve lever shaft sub-assembly.

(c) Remove the 2 bolts and park/neutral position switch assembly from the automatic transaxle case sub-assembly.

NOTICE:

Before removing the park/neutral position switch assembly, remove any dirt or rust on the installation portion of the manual valve lever shaft sub-assembly. Be sure to remove the park/neutral position switch assembly straight along the manual valve lever shaft sub-assembly while being careful not to deform the plate spring that supports the manual valve lever shaft sub-assembly. If the plate spring is deformed, the park/neutral position switch assembly cannot be reinstalled correctly.