2AR-FE without Wireless Door Lock
POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for 2AR-FE without Wireless Door Lock): PRECAUTION
1. PRECAUTION FOR DISCONNECTING THE BATTERY CABLE
NOTICE:
When disconnecting the battery negative (-) cable, initialize the following system after the cable is reconnected:
2. IGNITION SWITCH EXPRESSIONS
The type of ignition switch used on this model differs according to the specification of the vehicle.
The expressions listed in the table below are used in this section.
3. 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.
4. PRECAUTIONS FOR REMOVAL, INSTALLATION AND REPLACEMENT OF ELECTRONIC POWER STEERING COMPONENTS
(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) After replacing the electric power steering column sub-assembly or power steering ECU assembly, calibrate the torque sensor zero point 2AR-FE without Wireless Door Lock.
5. HANDLING PRECAUTION
(a) When handling electronic parts:
(1) Avoid any impact to parts such as ECUs and relays. Replace them with new ones if dropped or subjected to a severe blow.
(2) Do not expose any electronic parts to high temperatures or humidity.
(3) 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:
(1) When the power steering ECU assembly has been replaced with a new one, perform assist map writing and torque sensor zero point calibration 2AR-FE without Wireless Door Lock.
(c) When handling the electric power steering column sub-assembly:
(1) Avoid any impact to the electric power steering column sub-assembly, especially to the motor and torque sensor. Replace them with new ones if dropped or subjected to a severe blow.
(2) Do not pull the wire harness when moving the electric power steering column sub-assembly.
(3) When the electric power steering column sub-assembly has been replaced, perform torque sensor zero point calibration after initializing the torque sensor zero point 2AR-FE without Wireless Door Lock.
(d) When disconnecting and reconnecting the connectors:
(1) Before disconnecting the 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.
(2) Before reconnecting the 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.
(3) If the above operations are not carried out properly, the steering center point (zero point) will deviate, which may lead to a difference in steering effort between turning right and left. If there is a difference in steering effort between turning right and left, perform torque sensor zero point calibration after initializing the torque sensor zero point 2AR-FE without Wireless Door Lock.
6. PRECAUTIONS FOR CAN COMMUNICATION
(a) CAN communication lines are used to receive information from the 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) Perform troubleshooting for communication problems when CAN communication DTCs are output. Be sure to start troubleshooting the electronic power steering system after confirming that the CAN communication system is normal.
(c) Since the CAN communication lines each have their own length and route, they cannot be temporarily repaired with a bypass wire, etc.