Nissan Maxima Service and Repair Manual: System description

EPS SYSTEM

System Diagram

CONTROL DIAGRAM

Nissan Maxima. CONTROL DIAGRAM

System Description

Nissan Maxima. System Description

  • The EPS system controls the power steering solenoid valve
    through the power steering control unit.
  • The valve driving voltage to control the power steering solenoid
    valve varies according to the vehicle speed.

OPERATION PRINCIPLE

During Parking (When Turning The Steering Wheel To The Right)

Nissan Maxima. OPERATION PRINCIPLE

  1. Power steering solenoid valve is closed while a vehicle is stopped.
  2. Pinion "1R", "2R" and "3R" are closed depending on steering torque of steering wheel.
  3. Oil pressure "P" in the gear housing assembly is the sum of oil pressures occurring in "2R" and "3R". This
    results in a light steering force because of high pressure.

During High-speed Operation

Nissan Maxima. During High-speed Operation

  1. Power steering solenoid valve is opened during high-speed operation.
  2. Pinion "1R", "2R" and "3R" are closed depending on steering torque of steering wheel.
  3. Oil pressure "2R" does not occur because the power steering solenoid valve is on full throttle.
  4. Oil pressure "P" in the gear housing assembly includes only oil pressure occurring in "3R" and results in a
    heavy steering force.

Component Parts Location

Nissan Maxima. Component Parts Location

  1. Power steering control unit M59
    (view with glove box removed)
  2. Power steering solenoid valve E14

Component Description

Nissan Maxima. Component Description

    Basic inspection
    DIAGNOSIS AND REPAIR WORKFLOW Work Flow DETAILED FLOW 1.COLLECT THE INFORMATION FROM THE CUSTOMER It is also important to clarify customer complaints before inspection. First of all, reproduce s ...

    DTC/circuit diagnosis
    ...

    Other materials:

    ECU diagnosis information
    DIAGNOSIS SENSOR UNIT Trouble Diagnosis with CONSULT DIAGNOSTIC CODE CHART NOTE:Follow the procedures in numerical order when repairing malfunctioning parts. Confirm whether malfunction is eliminated using air bag warning lamp or CONSULT each time repair is finished. If malfunction is stillo ...

    P1709 incompleted data writing
    Description When TCM does not store calibration data (individual characteristic value) of each solenoid valve that is stored in the ROM assembly (in the control valve), a malfunction is detected. DTC Logic DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE NOTE: Immediately after performing ...

    Instrument Panel
    Vent Headlight/fog light/turn signal switch Supplemental front-impact air bag. Horn Meters and gauges. Warning and indicator lights. Vehicle information display Paddle shifters (if so equipped) Wiper and washer switch Audio controls*.  Navigation controls* Hazard warning ...

    Nissan Maxima Owners Manual

    Nissan Maxima Service and Repair Manual

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