2008 Toyota Avalon LimitedFACTORY OEM SERVICE PROCEDURE

Repair Instruction: Initialization

NOTE: When disconnecting the negative (-) battery terminal, initialize the following system(s) after the terminal is reconnected.
SYSTEM NAME REFERENCE CHART

System Name See Step No.
Power Window Control System 1
Sliding Roof System 2
  1. INITIALIZE POWER WINDOW REGULATOR MOTORΒ 
    NOTE: Resetting the power window motor (initializing the pulse sensor) is necessary when the battery terminal is disconnected; when the power window regulator master switch, power window regulator switch, wire harness, power window regulator and power window motor are replaced or removed/installed; or when the FR DOOR fuse, ECU-B fuse and ECU-IG No.1 fuse are replaced. AUTO operation function, jam protection function and remote operation function via the power window regulator master switch do not operate without resetting.
    1. Ignition switch on (IG).
    2. (Power window can be partially or fully open.)
    3. Close the power window by holding the Auto UP knob ON.
    4. Continue to hold the Auto UP knob ON a minimum of 1 second after the power window completely closes.
    5. Release the Auto UP knob.

      HINT:

      Front passenger must be initialized from actual multiplex network switch assembly. After initialization operation (from the multiplex network master switch assembly to the multiplex network switch assembly) will be allowed.

  2. INITIALIZATION OF SLIDING ROOF MOTORΒ 
    1. The sliding roof AUTO operation and the jam protection function may not operate normally if the battery is disconnected/reconnected, replaced or recharged. Initialize the sliding roof system using the method below.
      1. Turn the ignition switch on (IG).
      2. Initialize the sliding roof by pressing and holding the TILT UP switch until the roof glass tilts upward fully (the roof glass automatically tilts downward slightly after fully tilting upward).
      3. Release the switch.

        HINT:

        If the battery terminal is disconnected, the sliding roof control ECU may not detect the position of the roof glass. If the sliding roof AUTO operation is still disabled even after the sliding roof drive gear has been initialized, the hall IC may be malfunctioning. The hall IC is built into the sliding roof drive gear and detects the roof glass position.

        If the result is not as specified, replace the drive gear assembly (sliding roof control ECU).

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.