RM36D0EC _57 Power Source / Network _083090 POWER DISTRIBUTION _0403094 MAIN BODY ECU A

POWER DISTRIBUTION MAIN BODY ECU REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed, installed, or replaced during the main body ECU (multiplex network body ECU) removal/installation are shown below.

Necessary Procedure After Parts Removed/Installed/Replaced (for HV Model)
Replaced Part or Performed Procedures	Necessary procedures	Effect/Inoperative Function When Necessary Procedures are not Performed	Link
Main body ECU (multiplex network body ECU)	ECU configuration	-	(202405,999999,_V1,_083041,_0402305,RM100000002M670,)
Main body ECU (multiplex network body ECU)	Code registration	· Wireless door lock control system (w/ Smart Entry and Start System) · Smart entry and start system (for Entry Function, HV Model) · Smart entry and start system (for Start Function, HV Model) · Hybrid control system cannot be started · Telematics system · Digital key system	See Service Bulletin for the registration method.

HINT:

When the cable is disconnected/reconnected to the auxiliary battery terminal, systems temporarily stop operating. However, each system has a function that completes learning the first time the system is used.

Learning completes when vehicle is driven

Effect/Inoperative Function When Necessary Procedures are not Performed	Necessary Procedures	Link
Lane tracing assist system	Drive the vehicle straight ahead at 35 km/h (22 mph) or more for 5 second or more.	(201910,999999,_58,_083101,_0401880,RM100000001JE9I,)
Pre-collision system		(201910,999999,_58,_083101,_0401880,RM100000001JE9I,)

Learning completes when vehicle is operated normally

Effect/Inoperative Function When Necessary Procedures are not Performed	Necessary Procedures	Link
Power back door function	Fully close the back door by hand. HINT: Initialization is not necessary if the above procedures are performed while the back door is closed.	(202304,999999,_59,_083093,_0584672,RM1000000029PGT,)
Power door lock control system	If the back door is locked and therefore cannot be opened, it is necessary to unlock the back door using the door control switch, electrical key transmitter sub-assembly switch.	(202409,999999,_58,_083092,_0403003,RM100000002NS90,)
Air conditioning system	After the ignition switch is turned to ON, the servo motor standard position is recognized	-

Necessary Procedure After Parts Removed/Installed/Replaced (for Gasoline Model)
Replaced Part or Performed Procedures	Necessary procedures	Effect/Inoperative Function When Necessary Procedures are not Performed	Link
w/ Smart entry and start system: Main body ECU (multiplex network body ECU)	ECU configuration	-	(202405,999999,_V1,_083041,_0402305,RM100000002M670,)
	Code registration	· Wireless door lock control system (w/ Smart Entry and Start System) · Smart entry and start system (for Entry Function, Gasoline Model) · Smart entry and start system (for Start Function, Gasoline Model) · Engine start function · Telematics system · Digital key system	See Service Bulletin for the registration method.

HINT:

Learning completes when vehicle is driven

Effect/Inoperative Function When Necessary Procedures are not Performed	Necessary Procedures	Link
Stop and start system	Drive the vehicle until stop and start control is permitted (approximately 5 to 60 minutes).	(202409,999999,_51,_083056,_0402418,RM100000002NSFO,)
Lane tracing assist system	Drive the vehicle straight ahead at 15 km/h (10 mph) or more for 1 second or more.	(201910,999999,_58,_083101,_0401880,RM100000001JE9I,)
Pre-collision system		(201910,999999,_58,_083101,_0401880,RM100000001JE9I,)

Learning completes when vehicle is operated normally

Effect/Inoperative Function When Necessary Procedures are not Performed	Necessary Procedures	Link
*: w/ Power back door system
Power back door function*	Fully close the back door by hand. HINT: Initialization is not necessary if the above procedures are performed while the back door is closed.	(202304,999999,_59,_083093,_0584672,RM1000000029PGT,)
Power door lock control system	If the back door is locked and therefore cannot be opened, it is necessary to unlock the back door using the door control switch, electrical key transmitter sub-assembly switch.	(202409,999999,_58,_083092,_0403003,RM100000002NS90,)
Air conditioning system	After the ignition switch is turned to ON, the servo motor standard position is recognized	-

PROCEDURE

Hide Display 1. PRECAUTION

CAUTION:: Some of these service operations affect the SRS airbag system. Read the precautionary notices concerning the SRS airbag system before servicing.; ·

for GTMC Made:

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for GTMC Made)>PRECAUTION202405,999999,_58,_083100,_0694959,RM100000002LV12,

·

for SFTM Made

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for SFTM Made)>PRECAUTION202409,999999,_58,_083100,_0694957,RM100000002NSNT,

NOTICE:: ·

Do not remove the main body ECU (multiplex network body ECU) except when replacing it.

·

When removing the main body ECU (multiplex network body ECU), always replace it with a new one.

Hide Display 2.DISCONNECT CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL

CAUTION:: ·

Wait at least 60 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.

·

If the airbag deploys for any reason, it may cause a serious accident.

for A25B-FXS:

Click hereGeneral>MAINTENANCE>A25B-FXS AUXILIARY BATTERY>REMOVAL202409,999999,_V1,_083136,_0403618,RM100000002NHPL,

for A25D-FXS:

Click hereGeneral>MAINTENANCE>A25D-FXS AUXILIARY BATTERY>REMOVAL202409,999999,_V1,_083136,_0477834,RM100000002NHPM,

for M20C-FKS:

Click hereGeneral>MAINTENANCE>M20C-FKS BATTERY>REMOVAL202409,999999,_V1,_083136,_0418197,RM100000002NHPI,

for M20D-FKS:

Click hereGeneral>MAINTENANCE>M20D-FKS BATTERY>REMOVAL202409,999999,_V1,_083136,_0403617,RM100000002NHPJ,

for A25F-FXS:

Click hereGeneral>MAINTENANCE>A25F-FXS AUXILIARY BATTERY (Production date from 2021/08)>REMOVAL202409,999999,_V1,_083136,_0486275,RM100000002NHPN,

Hide Display 73900 3.REMOVE LOWER NO. 1 INSTRUMENT PANEL AIRBAG ASSEMBLY

Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>KNEE AIRBAG ASSEMBLY>REMOVAL202409,999999,_58,_083100,_0400495,RM100000002NG0B,

Hide Display 55308C 4.REMOVE CENTER INSTRUMENT PANEL BRACKET SUB-ASSEMBLY

Detach the 2 wire harness clamps.

0,0 0,0 false

	Nut
	Bolt

Remove the nut, bolt and center instrument panel bracket sub-assembly.

Hide Display 5.REMOVE POWER DISTRIBUTION BOX ASSEMBLY WITH MAIN BODY ECU

w/ Power Back Door:

Disconnect the 5 connectors.

ii.

Detach the wire harness clamp.

w/o Power Back Door:

2.438,2.375 2.708,2.604 0.271,0.229 12 true *A

*A	w/ TOYOTA Parking Assist-sensor System

w/ TOYOTA Parking Assist-sensor System:

Disconnect the 4 connectors.

ii.

w/o TOYOTA Parking Assist-sensor System:

Disconnect the 3 connectors.

iii.

Detach the wire harness clamp.

1.917,1.167 2.667,1.167 true 1.917,1.667 2.167,1.667 2.167,1.667 2.167,1.167 true 2.719,1.083 2.927,1.281 0.208,0.198 10 true *a

*a	Lever Connector
	Rotate in this Direction
	Protective Tape

Using a thin-bladed screwdriver with its tip wrapped with protective tape, detach the claw and disconnect the 2 lever connectors.

Detach the wire harness clamp.

Disconnect the 3 connectors.

Disconnect the 5 connectors.

Remove the 2 nuts.

Detach the claw and disconnect the power distribution box assembly with main body ECU.

Detach the claw and remove the power distribution box assembly with main body ECU from the connector holder.

Using a thin-bladed screwdriver with its tip wrapped with protective tape, detach the claw and disconnect the 2 lever connectors.

0.833,1.583 1.333,1.583 1.333,1.583 1.333,2.917 true 0.833,2.167 1.333,2.167 true 1.281,2.958 1.594,3.115 0.313,0.156 10 false *a

*a	Lever Connector	-	-
	Rotate in this Direction		Protective Tape

Disconnect the connector.

Detach the wire harness clamp and remove the power distribution box assembly with main body ECU.

Hide Display 89221 6.REMOVE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

Detach the claw and remove the junction block bracket from the power distribution box assembly with main body ECU.

Press the lock of the power distribution box assembly and release the lock of the main body ECU (multiplex network body ECU) as shown in the illustration.

4.271,4.479 4.698,4.479 false 4.896,5.104 4.896,4.667 false 4.823,5.125 5.021,5.302 0.198,0.177 10 true *a 4.083,4.396 4.396,4.552 0.313,0.156 10 false *b

*a	Power Distribution Box Assembly	*b	Main Body ECU (Multiplex Network Body ECU)
	Movement Direction		Power Distribution Box Assembly Lock

While pressing the lock, horizontally insert a thin-bladed screwdriver with its tip wrapped with protective tape between the main body ECU (multiplex network body ECU) and power distribution box assembly.

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.).

0,0 0,0 false

Horizontally Insert a Thin-bladed Screwdriver

Protective Tape

0.573,1.542 1.188,1.542 true 0.396,1.479 0.708,1.635 0.313,0.156 10 false *a

*a	Internal Connector
	Insert a Thin-bladed Screwdriver in this Direction
	Released in this Direction
	Protective Tape

When the thin-bladed screwdriver with its tip wrapped with protective tape is inserted, the internal connector lock is released.

NOTICE:: ·

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

·

Do not excessively insert the screwdriver. Otherwise, the internal connector terminals may become deformed or damaged.

·

Replace the power distribution box assembly when the connector terminal, the locking section, or the case is damaged or deformed.

Hold the rib of the main body ECU (multiplex network body ECU).

0,0 0,0 false

Rotate in this Direction

While rotating the main body ECU (multiplex network body ECU), completely release the lock.

0,0 0,0 false

Remove in this Direction

Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.