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Home >> Ford >> 2021 >> Expedition Platinum, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 529 (Starting System - 3.5L ECOBOOST (272KW/370PS)) >> Diagnosis And Testing >> Starting System >> Pinpoint Test(s) >> Pinpoint Test C : Unusual Starter Noise >> Pinpoint Test C : Unusual Starter Noise

Pinpoint Test C : Unusual Starter Noise

WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

  1. C1 CHECK THE STARTER MOUNTING

    • Inspect the starter mounting bolts for looseness.

    Is the starter motor mounted correctly? 

    Yes  GO to  C2
    No  INSTALL the starter motor correctly. REFER to: Starter Motor - Raptor  or Starter Motor .

  2. C2 CHECK FOR STARTER NOISE

    • Ignition OFF.

    • Connect a remote starter switch between the starter solenoid C1716A-1 ("B" terminal) and C1716B-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  or Starter Motor Drive Gear and Flywheel Ring Gear Inspection - Raptor .
    No  REFER to: Engine . to continue diagnosis.
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