Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM1000000018CTT
Model Year Start: 2018 Model: Sienna Prod Date Range: [11/2017 -           ]
Title: THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL; 2018 - 2020 MY Sienna [11/2017 -        ]

REMOVAL

PROCEDURE

1. PRECAUTION

NOTICE:

After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

Click here 2017 - 2020 MY Sienna [08/2016 -        ]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION

2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

NOTICE:

When disconnecting the cable, some systems need to be initialized after the cable is reconnected (See page 2018 - 2020 MY Sienna [11/2017 -        ]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION ).

3. REMOVE FRONT DOOR SCUFF PLATE RH

(See page 2018 - 2020 MY Sienna [11/2017 -        ]; INTERIOR PANELS / TRIM: ROOF HEADLINING: REMOVAL+ )

4. REMOVE COWL SIDE TRIM BOARD RH

(See page 2018 - 2020 MY Sienna [11/2017 -        ]; INTERIOR PANELS / TRIM: ROOF HEADLINING: REMOVAL+ )

5. SEPARATE FRONT DOOR OPENING TRIM WEATHERSTRIP RH

6. REMOVE GLOVE COMPARTMENT DOOR SUB-ASSEMBLY

(See page 2018 - 2020 MY Sienna [11/2017 -        ]; INTERIOR PANELS / TRIM: INSTRUMENT PANEL SAFETY PAD: REMOVAL+ )

7. REMOVE PARKING ASSIST ECU (w/ Panoramic View Monitor System)

Click here 2018 - 2020 MY Sienna [11/2017 -        ]; PARK ASSIST / MONITORING: PARKING ASSIST ECU: REMOVAL+

8. REMOVE MAYDAY ECU ASSEMBLY (w/ Mayday System)

Click here 2018 - 2020 MY Sienna [11/2017 -        ]; CELLULAR COMMUNICATION: MAYDAY ECU: REMOVAL+

9. REMOVE ECU INTEGRATION BOX RH

(a) Disconnect each connector.

(b) Disengage the 2 clamps.

HINT:

If the vehicle is equipped with a wire harness clamp, disengage the clamp.

(c) Remove the 2 nuts and bolt and ECU integration box RH with each ECU.

10. REMOVE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Using a screwdriver with its tip wrapped in protective tape, disengage the 2 claws to remove the certification ECU (smart key ECU assembly).

*a

Protective Tape