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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 J: System Pressure Valve

Pinpoint Test J: System Pressure Valve

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 

    The TR9070 transmission uses hydraulic line pressure to engage and disengage each of the clutches, to engage and disengage each gear, and to circulate fluid through the transmission fluid cooling system. Line pressure is controlled by the system pressure valve (SPV). The TCM provides system voltage to the system pressure valve (SPV) through a high side driver. The TCM then controls the system pressure valve (SPV) through a low side driver.

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    TCM P2727:00 Pressure Control Solenoid 'E' Control Circuit/Open: No Sub Type Information The TCM sets this DTC when it detects an open in the system pressure valve (SPV) circuit.
    TCM P2729:00 Pressure Control Solenoid 'E' Control Circuit Low: No Sub Type Information The TCM sets this DTC when it detects an open or a short to ground in the system pressure valve (SPV) circuit.
    TCM P2730:00 Pressure Control Solenoid 'E' Control Circuit High: No Sub Type Information The TCM sets this DTC when it detects a short to power in the system pressure valve (SPV) circuit.

    Possible Sources 

    • Circuit open or shorted
    • TCM
    • Transmission

  2. J1 CHECK THE SYSTEM PRESSURE VALVE (SPV) POWER CIRCUIT FOR VOLTAGE

    • Ignition OFF.

    • Disconnect Transmission C1575B .

    • 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
      C1575B-14
      GFD718916Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the voltage greater than 11 volts? 

    Yes  GO to  J5
    No  GO to  J2

  3. J2 CHECK THE SYSTEM PRESSURE VALVE (SPV) POWER 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
      C1575B-14
      GFD718917Courtesy of FORD MOTOR COMPANY
      		 C1750B-92

    Is the resistance less than 3 ohms? 

    Yes  GO to  J3
    No  REPAIR the circuit.

  4. J3 CHECK THE SYSTEM PRESSURE VALVE (SPV) POWER CIRCUIT FOR A SHORT TO GROUND

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C1575B-14
      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  GO to  J4

  5. J4 CHECK THE SYSTEM PRESSURE VALVE (SPV) POWER CIRCUIT FOR A SHORT TO GROUND WITH THE TRANSMISSION DISCONNECTED

    • Disconnect Transmission C1575A .

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

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C1575B-14
      GFD718917Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  INSTALL a new transmission. REFER to: Transmission 
    No  REPAIR the circuit.

  6. J5 CHECK THE SYSTEM PRESSURE VALVE (SPV) CONTROL 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
      C1575B-15
      GFD718917Courtesy of FORD MOTOR COMPANY
      		 C1750B-74

    Is the resistance less than 3 ohms? 

    Yes  GO to  J6
    No  REPAIR the circuit.

  7. J6 CHECK THE SYSTEM PRESSURE VALVE (SPV) CONTROL CIRCUIT FOR A SHORT TO GROUND

    • Measure:
      Positive Lead Measurement / Action Negative Lead
      C1575B-15
      GFD718917Courtesy of FORD MOTOR COMPANY
      		 Ground

    Is the resistance greater than 10, 000 ohms? 

    Yes  GO to  J7
    No  REPAIR the circuit.

  8. J7 CHECK THE SYSTEM PRESSURE VALVE (SPV) CONTROL CIRCUIT FOR A SHORT TOGETHER WITH THE TRANSMISSION POWER CIRCUITS

    Are the resistances greater than 10, 000 ohms? 

    Yes  GO to  J8
    No  REPAIR the circuit.

  9. J8 RECHECK THE TCM (TRANSMISSION CONTROL MODULE) FOR DIAGNOSTIC TROUBLE CODES (DTCS)

    • Ignition OFF.

    • Connect all connectors that have been disconnected. Make sure they seat and latch correctly.

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

    • Ignition ON.

    • Wait 10 seconds.

    • Ignition OFF.

    • Ignition ON.

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

    Did the DTC return? 

    Yes  INSTALL a new transmission. REFER to: Transmission 
    No  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.
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