Lexus ES manuals

Lexus ES: 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 Control System (for HV Model)

Pre-collision System (for HV Model)

Parking Support Brake System (for HV Model)*

Lighting System (for HV Model)

Memorize steering angle neutral point

Parking Assist Monitor System (for HV Model)

Panoramic View Monitor System (for HV Model)

Initialize power trunk lid system

Power Trunk Lid System (for HV Model)

Replacement of ECM

Perform Vehicle Identification Number (VIN) registration

MIL illuminates

NOTICE:

  • After the power switch is turned off, the radio receiver assembly records various types of memory and settings. As a result, after turning the power switch off, make sure to wait at least 85 seconds before disconnecting the cable from the negative (-) auxiliary battery terminal. (for Audio and Visual System)
  • After the power switch is turned off, the radio receiver assembly records various types of memory and settings. As a result, after turning the power switch off, make sure to wait at least 85 seconds before disconnecting the cable from the negative (-) auxiliary battery terminal. (for Navigation System)
  • 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. PRECAUTION

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.

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 or 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.

READ NEXT:

 Installation

INSTALLATION PROCEDURE 1. INSTALL NO. 2 ECM BRACKET (a) Install the No. 2 ECM bracket to the ECM with the 2 screws. Torque: 4.5 N·m {46 kgf·cm, 40 in·lbf} 2. INSTALL NO. 1 ECM BRACKET (a) Install

 Engine Coolant Temperature Sensor

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 Data List / Active Test

DATA LIST / ACTIVE TEST READ DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may b

 ECU Power Source Circuit

DESCRIPTION If the power switch is on (IG), the battery ECU assembly applies current to the MREL terminal to turn the IGCT relay on. This supplies power to the IGCT terminals. WIRING DIAGRAM CAUTION / NOTICE / HINT CAUTION: Before the following operations are conducted, take precautions to preve

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