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Home >> Infiniti >> 2024 >> QX55 Essential >> Repair and Diagnosis >> Steering >> Steering Control Systems >> Steering Control System (Direct Adaptive Steering) (DTC/Circuit Diagnosis) (2 Of 2) >> DTC/Circuit Diagnosis >> C13E5-00 St Clutch Release Protection >> EPS/DAST 3 >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

  1. CHECK THE STEERING CLUTCH 
    1. Check the steering clutch. Refer to Component Inspection .

    Is the inspection result normal?

    YES>>

    GO TO 2.

    NO>>

    Steering clutch is malfunctioning. Replace steering clutch assembly. Refer to Removal and Installation .

  2. CHECK THE CLUTCH CIRCUIT 
      1. Disconnect steering force control module connector and steering clutch connector.
      2. Check the continuity between steering force control module harness connector and steering clutch harness connector.
        Steering force control module Steering clutch Continuity
        Connector Terminal Connector Terminal
        E141 26 E140 1 Yes
        28 3
      3. Check the continuity between steering force control module harness connector and ground.
        Steering force control module - Continuity
        Connector Terminal
        E141 26 Ground No
        28

    Is the inspection result normal?

    YES>>

    GO TO 3.

    NO>>

    Repair or replace malfunctioning component.

  3. REPLACE STEERING CLUTCH 
    1. SYMBOL CONSULT
      1. Replace steering clutch assembly. Refer to Removal and Installation .
      2. Start the engine.
        CAUTION:

        Never drive the vehicle.

      3. Select "TORQUE SEN MAIN 1" in "Data Monitor" mode of "EPS/DAST 3".
      4. Check that the value is within standard value while steering the steering wheel.
        Monitor item Standard value(Approx.)
        TORQUE SEN MAIN 1 -0.9 N.m ≤ TORQUE SEN MAIN 1 ≤ 0.9 N.m

    Is the inspection result normal?

    YES>>

    Inspection End.

    NO>>

    GO TO 4.

  4. REPLACE STEERING FORCE CONTROL MODULE 
    1. SYMBOL CONSULT
      1. Replace steering force control module. Refer to Removal and Installation .
      2. Start the engine.
        CAUTION:

        Never drive the vehicle.

      3. Select "TORQUE SEN MAIN 1" in "Data Monitor" mode of "EPS/DAST 3".
      4. Check that the value is within standard value while steering the steering wheel.
        Monitor item Standard value(Approx.)
        TORQUE SEN MAIN 1 -0.9 N.m ≤ TORQUE SEN MAIN 1 ≤ 0.9 N.m

    Is the inspection result normal?

    YES>>

    Inspection End.

    NO>>

    Replace steering gear assembly. Refer to Removal and Installation .