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Home >> Ford >> 2018 >> Taurus Limited, FWD, Gas >> Repair and Diagnosis >> External Pages >> Different car >> Section 107 (Starting System - 2.0L DURATEC-He (129KW/175PS)) >> Diagnosis And Testing >> Starting System >> Pinpoint Test(s) >> Pinpoint Test F : P2535 (With Push Button Start)

Pinpoint Test F : P2535 (With Push Button Start)

WARNING: This page is about a different car, the 2018 Ford EcoSport. However, it is still accessible from the selected car via links, so may be relevant.
  1. Refer to Starting System for schematic and connector information.

    Normal Operation and Fault Conditions 

    When the engine start/stop switch has been pressed, the PCM receives a voltage signal on the crank detect circuit. The PCM then supplies voltage and ground to the starter relay coil when the required inputs have been received.

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    PCM P2535:00 Ignition Switch On/Start Position Circuit High: No Sub Type Information This DTC sets when the PCM detects voltage on the crank detect circuit while the engine is running.

    Possible Sources 

    • BCM
    • Ignition switch - Push Button Start
    • PCM
    • Wiring, terminals or connectors

  2. F1 CHECK THE CRANK DETECT CIRCUIT FOR A SHORT TO VOLTAGE WITH THE PCM (POWERTRAIN CONTROL MODULE) DISCONNECTED

    • Ignition OFF.

    • Disconnect PCM C1915B.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C1915B-47
      GFD326386Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  GO to  F2
    No  GO to  F4

  3. F2 CHECK THE CRANK DETECT CIRCUIT FOR A SHORT TO VOLTAGE WITH THE IGNITION SWITCH DISCONNECTED

    • Ignition OFF.

    • Disconnect Ignition switch - Push Button Start C2195.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C1915B-47
      GFD326386Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  GO to  F3
    No  INSTALL a new ignition switch - push button start. Refer to: Ignition Switch - Vehicles With: Push Button Start .

  4. F3 CHECK THE CRANK DETECT CIRCUIT FOR A SHORT TO VOLTAGE WITH THE BCM (BODY CONTROL MODULE) DISCONNECTED

    • Ignition OFF.

    • Disconnect BCM C2280E.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C1915B-47
      GFD326386Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit.
    No  INSTALL a new BCM. Refer to: Body Control Module (BCM) .

  5. F4 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION

    • Ignition OFF.

    • Disconnect and inspect all PCM connectors.

    • Repair:

      • corrosion (install new connectors or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary

    • Reconnect the PCM connectors. Make sure they seat and latch correctly.

    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, PCM Guided Routine Testing .
    No  The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
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