Toyota CH-R Service Manual: Removal

Toyota CH-R Service Manual / Power Distribution / Main Body Ecu / 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 the main body ECU (multiplex network body ECU) 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
Disconnect cable from negative battery terminal	Initialize back door lock	Power door lock control system
	Memorize steering angle neutral point	Lane departure alert system (w/ Steering Control)
	Memorize steering angle neutral point	Pre-collision system
Main body ECU (multiplex network body ECU)	Perform code registration (Immobilizer system)	Wireless door lock control system Smart key system Engine start function Steering lock system	w/ Smart Key System:

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.

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2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

NOTICE:

When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

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3. REMOVE LOWER NO. 1 INSTRUMENT PANEL AIRBAG ASSEMBLY

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4. REMOVE NO. 3 INSTRUMENT PANEL TO COWL BRACE SUB-ASSEMBLY (except Cold Area Specification Vehicles)

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5. REMOVE NO. 3 INSTRUMENT PANEL TO COWL BRACE SUB-ASSEMBLY (for Cold Area Specification Vehicles)

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6. REMOVE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY WITH MAIN BODY ECU

(a) Disengage the clamp.

(b) Disconnect the 4 connectors.

Remove in this Direction

(d) Remove the bolt and nut.

(e) Disengage the clamp.

(f) Pull out the instrument panel junction block assembly with main body ECU.

(g) Disengage the clamp.

(h) Disengage the clamp.

Remove in this Direction

(i) Disengage the claws and pull down the lock levers to disconnect the 2 connectors as shown in the illustration.

(j) Remove the instrument panel junction block assembly with main body ECU.

7. REMOVE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

(a) Remove the bolt.

(b) Disengage the clamp to remove the wiring harness clamp bracket.

*1	Instrument Panel Junction Block Assembly
*2	Main Body ECU (Multiplex Network Body ECU)
	Push in this Direction

(d) With the instrument panel junction block assembly lock released, insert a screwdriver with its tip wrapped in protective tape horizontally between the main body ECU (multiplex network body ECU) and the instrument panel junction block assembly.

*a	Protective Tape
	Insert in this Direction
	Remove in this Direction

NOTICE:

Use a screwdriver with a diameter between 5.0 mm (0.197 in.) and 6.3 mm (0.248 in.) and a length of approximately 90 mm (3.54 in.).
Do not insert the screwdriver under the connector socket of the main body ECU (multiplex network body ECU).

(e) Using the screwdriver, carefully raise the main body ECU (multiplex network body ECU) to the position where the connector becomes disconnected.

NOTICE:

Do not twist the screwdriver to raise the main body ECU (multiplex network body ECU).

(f) Raise the main body ECU (multiplex network body ECU) as shown by the arrow (1), and then pull it out as shown by the arrow (2) in the illustration.

	Remove in this Direction (1)
	Remove in this Direction (2)

NOTICE:

Do not touch the main body ECU (multiplex network body ECU) connector.

Components

COMPONENTS ILLUSTRATION *A except Cold Area Specification Vehicles *B for Cold Area Specification Vehicles *1 INSTRUMENT PAN ...

Installation

INSTALLATION PROCEDURE 1. INSTALL MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) NOTICE: Make sure that the connecting surfaces are free of foreign matter. Do not touch the main body EC ...

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