Toyota Avalon (XX50): Occupant Classification Ecu

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Vehicle Interior / Supplemental Restraint Systems / Occupant Classification Ecu

Components

COMPONENTS

ILLUSTRATION

*1

OCCUPANT DETECTION ECU

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Installation

INSTALLATION

PROCEDURE

1. INSTALL OCCUPANT DETECTION ECU

(a) Engage the claw to install the occupant detection ECU.

NOTICE:

If the occupant detection ECU has been dropped, or there are any cracks, dents or other defects in the case or connector, replace the occupant detection ECU with a new one.

(b) Connect the 2 connectors.

NOTICE:

When installing the occupant detection ECU, be careful that the SRS wiring does not interfere with or is not pinched between other parts.

2. INSTALL FRONT SEAT ASSEMBLY RH

HINT:

Use the same procedure as for the LH side.

Click here

3. PERFORM DIAGNOSTIC SYSTEM CHECK

for Gasoline Model: Click here

for HV Model: Click here

4. PERFORM ZERO POINT CALIBRATION AND SENSITIVITY CHECK

for Gasoline Model: Click here

for HV Model: Click here

On-vehicle Inspection

ON-VEHICLE INSPECTION

CAUTION / NOTICE / HINT

CAUTION:

Be sure to correctly follow the removal and installation procedures for the occupant detection ECU.

PROCEDURE

1. INSPECT OCCUPANT DETECTION ECU (for Vehicle not Involved in Collision)

(a) Perform a diagnostic system check.

for Gasoline Model: Click here

for HV Model: Click here

2. INSPECT OCCUPANT DETECTION ECU (for Vehicle Involved in Collision)

(a) Perform a diagnostic system check.

for Gasoline Model: Click here

for HV Model: Click here

(b) Visually check for defects with the occupant detection ECU.

HINT:

The defects are as follows:

  • Cracks in the ECU housing
  • Dents in the ECU housing
  • Chips in the ECU housing
  • Cracks or other damage to the connector
  • Damage to the serial number

OK:

No defects are found.

If any defects are found, replace the occupant detection ECU with a new one.

Removal

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 occupant detection ECU removal/installation are shown below.

Necessary Procedures After Parts Removed/Installed/Replaced (for Gasoline Model)

Replaced Part or Performed Procedure

Necessary Procedure

Effect/Inoperative Function when Necessary Procedure not Performed

Link

*: When performing learning using the Techstream.

Click here

  • Replacement of the occupant detection ECU
  • Removal/installation of the front passenger seat

Zero point calibration (Occupant Classification System)

  • Occupant Classification System
  • Passenger airbag ON/OFF indicator
  • Airbag System (Front passenger side)
  • Seat Belt Warning System (Front passenger)

Disconnect cable from negative auxiliary battery terminal

Perform steering sensor zero point calibration

Lane Departure Alert System (w/ Steering Control)

Pre-collision System

Intelligent Clearance Sonar System*

Lighting System (for Gasoline Model with Cornering Light)

Memorize steering angle neutral point

Parking Assist Monitor System

Panoramic View Monitor System

Necessary Procedures After Parts Removed/Installed/Replaced (for HV Model)

Replaced Part or Performed Procedure

Necessary Procedure

Effect/Inoperative Function when Necessary Procedure not Performed

Link

*: When performing learning using the Techstream.

Click here

  • Replacement of the occupant detection ECU
  • Removal/installation of the front passenger seat

Zero point calibration (Occupant classification system)

  • Occupant classification system
  • Passenger airbag ON/OFF indicator
  • Airbag system (Front passenger side)
  • Seat belt warning system (Front passenger)

Disconnect cable from negative auxiliary battery terminal

Perform steering sensor zero point calibration

Lane Departure Alert System (w/ Steering Control)

Pre-collision System

Intelligent Clearance Sonar System*

Lighting System (for HV Model with Cornering Light)

Memorize steering angle neutral point

Parking Assist Monitor System

Panoramic View Monitor System

PROCEDURE

1. REMOVE FRONT SEAT ASSEMBLY RH

HINT:

Use the same procedure as for the LH side.

Click here

2. REMOVE OCCUPANT DETECTION ECU

(a) Disconnect the 2 connectors.

*a

Protective Tape

(b) Using a screwdriver with its tip wrapped with protective tape, disengage the claw and remove the occupant detection ECU.

Knee Airbag Assembly(for Front Passenger Side)

Occupant Classification System(for Gasoline Model)

See More:

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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual

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