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Home >> Ford >> 2021 >> Bronco Sport Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 948 (Starting System - 5.0L 32V Ti-VCT (359KW/486PS) (WU)/5.0L Ti-VCT V8 (343KW/466PS) (MF)) >> Diagnosis And Testing >> Starting System >> Pinpoint Test(s) >> Pinpoint Test D: P2535

Pinpoint Test D: P2535

WARNING: This page is about a different car, the 2021 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
  1. Refer to appropriate service information for schematic and connector information.

    Normal Operation and Fault Conditions 

    When the ignition switch - push button start has been pressed, the PCM receives a voltage signal on the crank detect circuit. When the required inputs have been received, the PCM supplies voltage and ground to the starter relay coil. The ignition switch - push button start is part of the FCIM and cannot be serviced separately. For more information, REFER to: Starting System - System Operation and Component Description .

    DTC Fault Trigger Conditions 

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

    Possible Sources 

    • Ignition switch - push button start
    • BCM
    • PCM
    • Wiring, terminals or connectors

  2. D1 CHECK THE CRANK DETECT CIRCUIT FOR A SHORT TO VOLTAGE WITH THE PCM (POWERTRAIN CONTROL MODULE) DISCONNECTED

    • Ignition OFF.

    • Disconnect PCM C175B.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C175B-22
      GFD602206Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  GO to  D2
    No  GO to  D4

  3. D2 CHECK THE CRANK DETECT CIRCUIT FOR A SHORT TO VOLTAGE WITH THE IGNITION SWITCH - PUSH BUTTON START DISCONNECTED

    • Ignition OFF.

    • Disconnect FCIM C2402A.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C175B-22
      GFD602206Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  GO to  D3
    No  Install a new ignition switch - push button start. REFER to: Front Controls Interface Module (FCIM) . or REFER to: Front Controls Interface Module (FCIM)

  4. D3 CHECK THE CRANK DETECT CIRCUIT FOR A SHORT TO VOLTAGE WITH THE BCM (BODY CONTROL MODULE) DISCONNECTED

    • Ignition OFF.

    • Disconnect BCM C2280B.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C175B-22
      GFD602206Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit.
    No  BCM : A guided routine is not applicable for this vehicle and market. Replace the component that was faulted through diagnosis.

  5. D4 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, refer to: 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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