POWER ASSIST SYSTEMS  POWER STEERING ECU  REMOVAL  

The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed and installed, or replaced during power steering ECU with motor assembly removal/installation are shown below.

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
Power steering ECU assembly	Update ECU security key	Vehicle Control History (RoB) are stored	(202304,999999,_V1,_143216,_0598316,RM100000002B3ML,)
	ECU configuration	· Vehicle Control History (RoB) are stored · EPS warning light illuminates	(202304,999999,_V1,_143216,_0598316,RM100000002B3ML,)
	Perform power steering ECU initial setting (assist map writing)	· Vehicle Control History (RoB) are stored · EPS warning light illuminates	(202304,202307,_55,_080761,_0392075,RM100000002B8OH,202307,999999,_55,_080761,_0392075,RM100000002CNVO,)
	End position initial setting	-

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
Power steering ECU assembly	except NR Series Update ECU security key	Vehicle Control History (RoB) are stored	(202304,999999,_V1,_143216,_0598316,RM100000002B3ML,)
	except NR Series ECU configuration	· Vehicle Control History (RoB) are stored · EPS warning light illuminates	(202304,999999,_V1,_143216,_0598316,RM100000002B3MK,)
	except NR Series Perform power steering ECU initial setting (assist map writing)	· Vehicle Control History (RoB) are stored · EPS warning light illuminates	(202304,999999,_55,_080761,_0392052,RM100000002B8PZ,)
	except NR Series End position initial setting	-	(202304,999999,_55,_080761,_0392052,RM100000002B8PZ,)
	for NR Series Perform power steering ECU initial setting (torque sensor zero point calibration and assist map writing)	· Vehicle Control History (RoB) are stored · Steering effort different between turning steering wheel left and right · EPS warning light illuminates	(202304,999999,_55,_080761,_0392052,RM100000002B8PZ,)

NOTICE:

After turning the ignition switch (for Gasoline Model) or power switch (for HV Model) 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.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>BEFORE DISCONNECTING BATTERY202304,202502,_V1,_143216,_0598315,RM100000002B3MI,

HINT:

When the cable is disconnected / reconnected to the 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 (for HV Model)

Effect/Inoperative Function when Necessary Procedure not Performed	Necessary Procedures	Link
Front Camera System	Drive the vehicle straight ahead at 15 km/h (9 mph) or more for 1 second or more.	(202304,999999,_95,_139716,_0584193,RM1000000029F4C,)

Learning completes when vehicle is driven (for Gasoline Model)

Effect/Inoperative Function when Necessary Procedure not Performed	Necessary Procedures	Link
Stop and Start System	Idle the engine for approximately 5 to 60 minutes or drive the vehicle until stop and start control is permitted	(201906,999999,_51,_080774,_0393362,RM100000001HXHC,)
Pre-collision System	Perform steering sensor zero point calibration	(202304,999999,_95,_139716,_0601175,RM100000002BFOE,)
Lane Tracing Assist System
Front Camera System	Drive the vehicle straight ahead at 15 km/h (9 mph) or more for 1 second or more.	(202304,999999,_95,_139716,_0584193,RM1000000029F4C,)