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Pinpoint Test Z: P1594 Or P1595

WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
  1. Normal Operation and Fault Conditions 

    When the BCM receives a request to remote start the vehicle, it first checks to make sure conditions exist to allow it to start (for example, the hood and doors closed, vehicle in PARK, no powertrain concerns). If the required conditions are correct, the BCM starts the vehicle and allows it to run for a predetermined amount of time, determined by the setting selected from the message center.

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    PCM P1594:00 Forced Engine Shutdown - Remote Start System Fault, No Unattended Vehicle Timeout: No Sub Type Information Sets when the PCM detects the remote start has been active for more than 30 minutes continuously.
    PCM P1595:00 Forced Engine Shutdown - Remote Start System Fault, Transmission Range Not In Park Position: No Sub Type Information Sets when the PCM detects the remote start is active with the transmission not in PARK.

    Possible Sources 

    • Network communication concern
    • Powertrain concern
    • BCM

  2. Z1 CHECK FOR OTHER PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

    • Review the results from the PCM self-test.

    Are any other PCM Diagnostic Trouble Codes (DTCs) present? 

    Yes  DIAGNOSE all other PCM Diagnostic Trouble Codes (DTCs) first. REFER to the appropriate Diagnostic Trouble Codes (DTCs) Chart.
    No  GO to  Z2

  3. Z2 CHECK FOR BCM (BODY CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

    • Ignition ON.

    • Using a diagnostic scan tool, carry out the BCM self-test.

    Are any BCM Diagnostic Trouble Codes (DTCs) present? 

    Yes  REFER to the DTC Chart(s) .
    No  GO to  Z3

  4. Z3 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION

    • Disconnect and inspect all the BCM 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 BCM connectors and 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 service articles: TSB, GSB, SSM, or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new BCM. REFER to: Body Control Module (BCM) .
    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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