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PINPOINT TEST D : P2535 (Without Push Button Start)

WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

  1. D1 RETRIEVE PCM DTCs

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

    Is DTC P2535 present? 

    Yes  GO to  D2.
    No  For all PCM DTCs, REFER to PCM DTC Chart .

  2. D2 CHECK THE CRANK DETECT CIRCUIT FOR A SHORT TO VOLTAGE WITH PCM DISCONNECTED

    • Ignition OFF.
    • Disconnect: PCM C175B .
    • Ignition ON.
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C175B-47
      GFD135805Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  GO to  D3
    No  GO to  D4

  3. D3 CHECK THE CRANK DETECT CIRCUIT FOR A SHORT TO VOLTAGE WITH IGNITION SWITCH DISCONNECTED

    • Ignition OFF.
    • Disconnect: Ignition switch C250 .
    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C175B-47
      GFD135805Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is any voltage present? 

    Yes  REPAIR the circuit.
    No  INSTALL a new ignition switch. REFER to Steering Column Switches

  4. D4 CHECK FOR CORRECT PCM OPERATION

    • Ignition OFF.
    • Disconnect and inspect all PCM connectors.
    • Repair:
      • corrosion (install new connector 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 TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no TSBs address this concern, INSTALL a new PCM. REFER to Electronic Engine Controls .
    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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