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Home >> Ford >> 2023 >> Escape ST-Line Select >> Repair and Diagnosis >> Engine Mechanical >> Exhaust >> Exhaust System - 2.5L DURATEC - Hybrid (121KW 164PS) (BG) 2.5L DURATEC - Hybrid (FHEV 148KW 201PS, PHEV 165KW 225PS ) (BG) >> Diagnosis And Testing >> Exhaust System >> Pinpoint Tests >> Pinpoint Test C: Surface Rust Or Degradation Of Surface Treatment

Pinpoint Test C: Surface Rust Or Degradation Of Surface Treatment

  1. NOTE: Surface rust is a characteristic of materials used on exhaust systems. Exposure to heat or road salt may result in surface rust.

    Normal Operation and Fault Conditions 

    REFER to: Exhaust System - System Operation and Component Description .

    Possible Sources 

    • Perforated catalytic converter/exhaust system

    Visual Inspection and Pre-checks 

    • Inspect for loose, damaged, contaminated or incorrect components.

  2. C1 CHECK THE EXHAUST SYSTEM FOR PERFORATIONS, RUST OR DAMAGE

    • Visually inspect the exhaust system, paying specific attention to joints, bends, low points and check for rust, perforations or surface degradation.

    Are perforations, rust or damage present? 

    Yes  INSTALL new components as necessary.
    No  GO to  C2

  3. C2 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION

    • Using a diagnostic scan tool, perform the PCM self-test.

    Are the powertrain controls operating correctly? 

    Yes  The condition may be intermittent. Advise the customer no repair is required.
    No  Correct and fix any powertrain control issues. Using a diagnostic scan tool, perform the PCM self-test. Test and confirm the issue has been resolved.
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