Toyota Avalon Service & Repair Manual: 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 ECM 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

*: When performing learning using the Techstream.

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Auxiliary battery terminal is disconnected/reconnected

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

Replacement of ECM

Perform Vehicle Identification Number (VIN) registration

MIL illuminates

NOTICE:

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

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  • If the ECM has been struck or dropped, replace it.
  • Perform Vehicle Identification Number (VIN) registration when replacing the ECM.

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PROCEDURE

1. REMOVE LUGGAGE TRIM SERVICE HOLE COVER

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2. DISCONNECT CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL

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3. REMOVE ECM

(a) Rotate the 2 levers while pushing the locks, and disconnect the 2 ECM connectors.

NOTICE:

After disconnecting the ECM connectors, make sure that dirt, water and other foreign matter does not contact the connecting parts of the ECM connectors.

(b) Remove the bolt and separate the engine wire from the No. 2 ECM bracket.

(c) Disengage the clamp.

(d) Remove the 2 nuts and ECM.

NOTICE:

If the ECM has been struck or dropped, replace it.

4. REMOVE NO. 1 ECM BRACKET

(a) Remove the 2 screws and No. 1 ECM bracket from the ECM.

5. REMOVE NO. 2 ECM BRACKET

(a) Remove the 2 screws and No. 2 ECM bracket from the ECM.

    Installation

    Engine Coolant Temperature Sensor

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