Steering Control System

PRECAUTIONS

Precautions For High-Voltage System
Refer to GI-24, "Precautions For High-Voltage System". Technician Safety Information

Precautions for Inspecting the Hybrid Control System
^ Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions, such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. Make sure to turn the ignition switch OFF before removing the service plug grip. 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.

NOTE: Turning the ignition switch ON (READY) with the service plug grip removed could cause a malfunction. Do not turn the ignition switch ON (READY) unless instructed by the service manual.

^ After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals.

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

^ Turn the ignition 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.
^ Turn the ignition switch OFF before performing any resistance checks.
^ Turn the ignition switch OFF before disconnecting or reconnecting any connectors.

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the "SRS AIRBAG" and "SEAT BELT" of this Service Manual.

WARNING:
^ To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in the event of a collision which would result in air bag inflation, all maintenance must be performed by an authorized NISSAN/INFINITI dealer.
^ Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag Module, see the "SRS AIRBAG".
^ Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness connectors.

Service Notice or Precautions for EPS System

CAUTION: Check the following item when performing the trouble diagnosis.
^ Check any possible causes by interviewing the symptom and it's condition from the customer if any malfunction, such as EPS warning lamp is turned ON, occurs.
^ Check if air pressure and size of tires are proper, the specified part is used for the steering wheel, and control unit is genuine part.
^ Check if the connection of steering column assembly and steering gear assembly is proper (there is not looseness of mounting bolts, damage of rods, boots or sealants, and leakage of grease, etc.).
^ Check if the wheel alignment is adjusted properly.
^ Check if there is any damage or modification to suspension or body resulting in increased weight or altered ground clearance.
^ Check if installation conditions of each link and suspension are proper.
^ Check if the battery voltage is proper.
^ Check connection conditions of each connector are proper.

^ Before connecting or disconnecting the EPS control unit harness connector, turn ignition switch "OFF" and disconnect battery ground cable. Because battery voltage is applied to EPS control unit even if ignition switch is turned "OFF".

^ When connecting or disconnecting pin connectors into or from EPS control unit, take care not to damage pin terminals (bend or break).
When connecting pin connectors, make sure that there are no bends or breaks on EPS control unit pin terminal.

^ Before replacing EPS control unit, perform EPS control unit input/output signal inspection and make sure whether EPS control unit functions properly or not. Refer to STC-43, "Reference Value". EPS Control Unit
^ If EPS control unit is replaced, always install new one.
- Once EPS control unit is used, it stores vehicle's data, which are non-erasable. Never use EPS control unit of other vehicles.
^ Perform EPS motor angle sensor initialization and torque sensor calibration when replacing EPS control unit. Refer to STC-5, "EPS MOTOR ANGLE SENSOR INITIALIZATION AND TORQUE SENSOR CALIBRATION: Special Repair Requirement". EPS Motor Angle Sensor Initialization and Torque Sensor Calibration