LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2022 >> Mustang Mach 1 Premium, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 22 (Automatic Transmission - 7-Speed Automatic Transmission - Tr9070 (Diagnosis And Testing, General Procedures, Removal And Installation)) >> Diagnosis And Testing >> DTC Chart and Pinpoint Tests >> Pinpoint Tests >> Pinpoint Test Y: Transmission Pull From Park Switch

Pinpoint Test Y: Transmission Pull From Park Switch

WARNING: This page is about a different variant/trim than selected.
  1. Refer to TRANSMISSION CONTROLS - TR9070 for schematic and connector information.

    Normal Operation and Fault Conditions 

    In the event the TCM is not able to disengage park, the vehicle is equipped with a manual park release cable. A pull from park switch is located at the console end of the manual park release cable. The TCM monitors the voltage drop across the pull from park switch to determine if the transmission manual park release is activated.

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    TCM P071D:00 Transmission Mode Switch 'B' Circuit: No Sub Type Information The TCM has detected an inconsistency between the pull from park switch and the transmission park position sensors A and B. The pull from park switch is indicating out-of-park and transmission park position sensors A and B are both indicating in-park. This can be caused by a sticking, binding, disconnected, damaged, or incorrectly routed manual park release cable.
    TCM P071E:00 Transmission Mode Switch 'B' Circuit Low: No Sub Type Information The TCM sets this DTC if it detects an open circuit in the pull from park switch circuit.
    TCM P071F:00 Transmission Mode Switch 'B' Circuit High: No Sub Type Information The TCM sets this DTC if it detects a short to ground in the pull from park switch circuit.

    Possible Sources 

    • Manual park release cable sticking, binding, or misrouted
    • Park position sensor calibration
    • Pull from park switch

  2. Y1 CHECK THE INSTALLATION AND OPERATION OF THE TRANSMISSION MANUAL PARK RELEASE CABLE

    • Operate the transmission park manual release system. Make sure the manual park release lever on the transmission moves as the cable pull strap is pulled and released. REFER to: Transmission Park by Wire Manual Release

    Is the transmission park manual release cable properly installed, and does it operate correctly? 

    Yes  GO to  Y2
    No  REPAIR the transmission park manual release system as necessary. REFER to: Transmission Park Manual Release Cable

  3. Y2 CHECK THE TCM (TRANSMISSION CONTROL MODULE) FOR DIAGNOSTIC TROUBLE CODES (DTCS)

    • Using a diagnostic scan tool, retrieve all diagnostic trouble codes (DTCs) from the TCM.

    Are any circuit or performance diagnostic trouble codes (DTCs) related to the transmission internal park system or TR sensor present? 

    Yes  RESOLVE all diagnostic trouble codes (DTCs) related to the transmission internal park system or TR sensor first. REFER to the Diagnostic Trouble Code (DTC) Chart .
    No  GO to  Y3

  4. Y3 CHECK THE PULL FROM PARK SWITCH SIGNAL INPUT CIRCUIT FOR VOLTAGE

    • Ignition OFF.

    • Disconnect Pull from park switch C399 .

    • Inspect the connector for damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals.

    • Ignition ON.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C399-2
      GFD718916Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage greater than 11 volts? 

    Yes  GO to  Y6
    No  GO to  Y4

  5. Y4 CHECK THE PULL FROM PARK SWITCH SIGNAL INPUT CIRCUIT FOR AN OPEN

    • Ignition OFF.

    • Inspect the connector for damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C399-2
      GFD718917Courtesy of FORD MOTOR COMPANY
      		 C1750A-25

    Is the resistance less than 3 ohms? 

    Yes  GO to  Y5
    No  REPAIR the circuit.

  6. Y5 CHECK THE PULL FROM PARK SWITCH SIGNAL INPUT CIRCUIT FOR A SHORT TO GROUND

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C399-2
      GFD718917Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  INSTALL a new TCM. REFER to: Transmission Control Module (TCM) 
    No  REPAIR the circuit.

  7. Y6 CHECK THE PULL FROM PARK SWITCH SIGNAL RETURN CIRCUIT FOR AN OPEN

    • Ignition OFF.

    • Inspect the connector for damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals.

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C399-3
      GFD718917Courtesy of FORD MOTOR COMPANY
      		 C1750A-26

    Is the resistance less than 3 ohms? 

    Yes  GO to  Y7
    No  REPAIR the circuit.

  8. Y7 CHECK THE PULL FROM PARK SWITCH SIGNAL RETURN CIRCUIT FOR A SHORT TO GROUND

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C399-3
      GFD718917Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  INSTALL a new pull from park switch (-7B229-). REFER to: Transmission Park Manual Release Cable
    No  REPAIR the circuit.
scientia non olet · About LEMON Manuals