Power Steering System

POWER ASSIST SYSTEMS: POWER STEERING SYSTEM: PRECAUTION

1. PRECAUTIONS FOR INSPECTING HIGH-VOLTAGE PARTS

(a) Before disconnecting the high-voltage connector of the power steering converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.

NOTICE:
After removing the service plug grip, turning the power switch on (READY) may cause a malfunction. Do not turn the power switch on (READY) unless instructed by the repair manual.

(b) After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals Hybrid Control System: Precaution.

HINT
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

(c) Check the voltage at the terminals in the inspection point in the inverter with converter assembly Hybrid Control System: Precaution.

CAUTION:
Be sure to wear insulated gloves.

(d) When turning the power switch on (IG) during inspections, do not press the power switch with the brake pedal depressed.

NOTICE:
Turning the power switch with the brake pedal depressed causes the system to enter the on (READY) state. This is very dangerous because high voltage may be applied to the inspection area.

(e) Turn the power switch off, wear insulated gloves, and disconnect the negative terminal of the auxiliary battery before touching any of the orange-colored wires of the high-voltage system.

(f) Turn the power switch off before performing any resistance checks.

(g) Turn the power switch off before disconnecting or reconnecting any connectors.

(h) When high-voltage connectors are removed, wrap the connectors with insulation tape to prevent them from contacting foreign objects.

2. PRECAUTION FOR DISCONNECTING THE CABLE FROM THE NEGATIVE BATTERY TERMINAL

NOTICE:
When disconnecting the cable from the negative (-) battery terminal, some systems need to be initialized after the cable is reconnected Repair Instruction - Initialization.

3. HANDLING PRECAUTIONS FOR SRS AIRBAG SYSTEM

(a) The 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 Service Precautions.

4. PRECAUTIONS FOR REMOVAL, INSTALLATION AND REPLACEMENT OF ELECTRONIC MOTOR POWER STEERING COMPONENTS

(a) After replacing the power steering ECU assembly, clear the rotation angle sensor calibration value, initialize the rotation angle sensor, and calibrate the torque sensor zero point Programming and Relearning.

5. HANDLING PRECAUTION

(a) When handling the electronic parts:

* Avoid any impact to electronic parts such as ECUs and relays. Replace them with new ones if dropped or subjected to a severe blow.

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

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

(b) Before disconnecting the connectors related to the electronic power steering system, turn the power switch on (IG), center the steering wheel and then turn the power switch off.

6. PRECAUTIONS FOR CAN COMMUNICATION

(a) CAN communication lines are used to receive information from the skid control ECU and the ECM, and to transmit warnings to the combination meter.

When there are any problems in the CAN communication lines, DTCs of the CAN communication line are output.

(b) Perform troubleshooting for the communication line problems when DTCs of the CAN communication are output. Be sure to start troubleshooting on the power steering system after confirming that the CAN communication system is normal.

(c) Since the CAN communication line has its own length and route, it cannot be repaired temporarily with a bypass wire, etc.