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Home >> Ford >> 2021 >> Explorer Limited Hybrid, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 32 (Starting System - 2.3L ECOBOOST (201KW/273PS)) >> Diagnosis And Testing >> Starting System - 2.3L EcoBoost (201kW/273PS) >> Pinpoint Test(s) >> Pinpoint Test D : Unusual Starter Noise

Pinpoint Test D : Unusual Starter Noise

WARNING: This page is about a different variant/trim than selected.
  1. Normal Operation and Fault Conditions 

    Correct starter operation relies on correct mounting of the starter to the engine, alignment of the starter ring gear to the flexplate and correct functioning of the starter assembly (internal gears, bearings).

    Possible Sources 

    • Engine
    • Starter motor
    • Starter motor mounting

    Visual Inspection and Pre-checks 

    • Inspect the starter motor.
    • Inspect the starter motor mounting.

  2. D1 CHECK THE STARTER MOUNTING

    • Inspect the starter mounting bolts for looseness.

    Is the starter motor mounted correctly? 

    Yes  GO to  D2
    No  INSTALL the starter motor correctly. REFER to: Starter Motor .
  3. D2 CHECK FOR STARTER NOISE

    • Ignition OFF.

    • Connect a remote starter switch between the starter solenoid C1971B-1 ("B" terminal) and C1971A-1 ("S" terminal).

    • Engage the starter and verify the noise is due to starter operation.

    Is the noise due to the starter engagement? 

    Yes  REFER to: Starter Motor Drive Gear and Flywheel Ring Gear Inspection .
    No  REFER to: Engine . to continue diagnosis.