RM3660EC _55 Steering _080761 POWER ASSIST SYSTEMS _0392052 POWER STEERING SYSTEM(for Gasoline Model) L

POWER ASSIST SYSTEMS  POWER STEERING SYSTEM(for Gasoline Model)  PRECAUTION  


PRECAUTIONS FOR DISCONNECTING CABLE FROM NEGATIVE (-)AUXILIARY BATTERY TERMINAL


NOTICE:
·

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) battery terminal.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>BEFORE DISCONNECTING BATTERY

HINT:

When disconnecting and reconnecting the battery, there is an automatic learning function that completes learning when the respective system is used.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>AUTOMATIC LEARNING CHART





METHOD TO IDENTIFY SETTINGS


a.

For the gasoline model, there are two types of power steering systems. Perform identification by referring to the Data List and following table.

Tester Display for Type A
(Click here) 		for Type B
(Click here)

○: Indication

-: Non-indication

Status of LearnedLeft/Right EndPosition for EndTorque Limit Control - ○
Learned End CurrentPosition for EndTorque Limit Control - ○
Learned Left EndPosition for EndTorque Limit Control - ○
Learned Right EndPosition for EndTorque Limit Control - ○
Super High SpeedSteering AngleSpeed AbnormalityNumber of Times - ○
Number of LearnedEnd Position Resets - ○



IGNITION SWITCH EXPRESSION


HINT:

The type of ignition switch used on this model differs depending on the specifications of the vehicle. The expressions listed in the table below are used in this section.

Expression Ignition Switch (Position) Engine Switch (Condition)
Ignition Switch off LOCK Off (Lock)
Ignition Switch ACC ACC On (ACC)
Ignition Switch ON ON On (IG)
Engine Start START On (Start)



HANDLING PRECAUTIONS FOR SRS AIRBAG SYSTEM


a.

This vehicle is equipped with a Supplemental Restraint System (SRS). Failure to carry out service operations in the correct sequence could cause the SRS to unexpectedly deploy during servicing. This may cause a serious accident.

Before servicing (including inspection, replacement, removal and installation of parts), be sure to read the precautionary notices for the Supplemental Restraint System.

for NR Series Engine: Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (for NR Series Engine)>PRECAUTION

except NR Series Engine: Click hereVehicle Interior>SUPPLEMENTAL RESTRAINT SYSTEMS>AIRBAG SYSTEM (except NR Series Engine)>PRECAUTION



PRECAUTIONS FOR REMOVAL, INSTALLATION AND REPLACEMENT OF ELECTRONIC POWER STEERING COMPONENTS (for Type A)


a.

Be sure to align the front wheels straight ahead when removing and installing the steering gear assembly.


b.

When disconnecting the steering intermediate shaft assembly, be sure to place matchmarks before starting the operation.


c.

When the power steering ECU assembly or electric power steering column sub-assembly has been replaced, perform Power Steering ECU Initial Setting (torque sensor zero point calibration and assist map writing).

Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING SYSTEM (for Gasoline Model)>CALIBRATION



PRECAUTIONS FOR REMOVAL, INSTALLATION AND REPLACEMENT OF ELECTRONIC POWER STEERING COMPONENTS (for Type B)


a.

Be sure to align the front wheels straight ahead when removing and installing the steering gear assembly.


b.

When disconnecting the steering intermediate shaft assembly, be sure to place matchmarks before starting the operation.


c.

When the power steering ECU assembly has been replaced, perform ECU security key registration.

Click hereGeneral>SETUP>WHEN REPLACING OR REMOVING/INSTALLING PARTS>UPDATE ECU SECURITY KEY


d.

When the power steering ECU assembly has been replaced, perform ECU writing.

Click hereGeneral>SETUP>WHEN REPLACING OR REMOVING/INSTALLING PARTS>ECU CONFIGURATION

HINT:

When performing ECU writing, the EPS warning light may illuminate and the buzzer may sound.



e.

When the power steering ECU assembly or electric power steering column sub-assembly has been replaced, perform Power Steering ECU Initial Setting (assist map writing).

Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING SYSTEM (for Gasoline Model)>CALIBRATION


f.

When the power steering ECU assembly or electric power steering column sub-assembly has been replaced, perform end position initial setting.

Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING SYSTEM (for Gasoline Model)>CALIBRATION



HANDLING PRECAUTION


a.

When handling electronic parts:

i.

Do not subject any parts such as ECUs and relays to any impact. Replace them with new ones if dropped or subjected to a strong impact.


ii.

Do not expose any electronic parts to high temperatures or humidity.


iii.

In order to prevent deformation or malfunctions due to static electricity, do not touch the connector terminals.



b.

When handling the power steering ECU assembly:

i.

When replacing the power steering ECU assembly, make sure to replace each power steering ECU assembly with a new one.

NOTICE:

Do not use a power steering ECU assembly intended from another vehicle (demo models, etc.).




c.

When disconnecting and reconnecting the connectors (for Type A):

i.

Before disconnecting connectors related to the power steering system, turn the ignition switch to ON, center the steering wheel, turn the ignition switch off, and then disconnect the connectors.


ii.

Before reconnecting connectors related to the power steering system, ensure that the ignition switch is off. Then center the steering wheel and turn the ignition switch to ON.

NOTICE:

Do not turn the ignition switch to ON when the steering wheel is not centered.



iii.

If the above steps are not performed, the steering center point (zero point) may be offset causing a difference in steering effort when turning left and right. If there is a difference in steering effort when turning left and right, perform Power Steering ECU Initial Setting (torque sensor zero point calibration and assist map writing).

Click hereSteering>POWER ASSIST SYSTEMS>POWER STEERING SYSTEM (for Gasoline Model)>CALIBRATION



d.

When disconnecting and reconnecting the connectors (for Type B):

i.

Before disconnecting connectors related to the power steering system, turn the ignition switch to ON, center the steering wheel, turn the ignition switch off, and then disconnect the connectors.


ii.

Before reconnecting connectors related to the power steering system, ensure that the ignition switch is off. Then center the steering wheel and turn the ignition switch to ON.

NOTICE:

Do not turn the ignition switch to ON when the steering wheel is not centered.





PRECAUTIONS FOR CAN COMMUNICATION


a.

CAN communication lines are used to receive information from the skid control ECU (brake actuator assembly) and ECM and to transmit warnings to the combination meter assembly. When problems are detected in the CAN communication lines, CAN communication DTCs are stored.


b.

If any CAN communication system DTCs are output, perform troubleshooting for the CAN communication system first.


c.

The wiring used for each communication line is a twisted pair of wires that have an equal length. Do not temporarily repair a CAN communication line with a bypass wire or equivalent.