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Home >> Mercury >> 2008 >> Milan Base, 2.3 Z, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1410 (Automatic Transmission - FNR5) >> Diagnostic Tests >> Pinpoint Tests - OSC Equipped Vehicle >> Pinpoint Tests >> Pinpoint Test D: Electronic PCA

Pinpoint Test D: Electronic PCA

WARNING: This page is about a different car, the 2009 Mercury Milan and 2009 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Refer to the Transaxle Main Valve Body Vehicle Harness Connector illustration Transaxle Connector Layouts .
NOTE: Read and record all DTCs. All Transmission Range (TR) sensor and Output Shaft Speed (OSS) DTCs must be repaired before entering output state control.
  1. D1 ELECTRONIC DIAGNOSTICS SETUP 
    • Key in OFF position.
    • Select PARK.
    • Check to make sure transaxle main valve body vehicle harness C1534 is fully seated, terminals are fully engaged in the connector and in good condition before proceeding.
    • Install the Transmission Fluid Pressure Gauge into the line tap.
    • Connect the diagnostic tool.
    • Start vehicle
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger Mode
    • Does the vehicle enter the DataLogger Mode? 
    1. YES  : REMAIN in DataLogger Mode. Go to  D2 .
    2. NO  : REPEAT procedure to ENTER DataLogger Mode. If vehicle did not enter output state control, REFER to Introduction - Gasoline Engines article for diagnosis of Transmission Control Module (TCM).
  2. D2 SOLENOID FUNCTIONAL TEST 
    • Monitor the Transmission Fluid Pressure Gauge.
    • Select PCA PID.
    • Increase engine speed above 1,500 RPM.
    • Change psi value.
    • Monitor the Transmission Fluid Pressure Gauge and the commanded pressure.
    • Select another value 50-150 psi.
    • Does the pressure reading match the commanded pressure? 
    1. YES  : CLEAR DTCs. TEST the system for normal operation.
    2. NO  : Go to  D3.
  3. D3 CHECK THE TRANSAXLE MAIN VALVE BODY VEHICLE HARNESS AND PCM FOR A SHORT TO POWER 
    • Key in OFF position.
    • Disconnect: Transaxle C1534
    • Visually inspect all wires and connectors for damage.
    • Key in ON position.
      • Fig 1: Measuring Voltage Between Transaxle Main Valve Body Vehicle Harness C1534-7, Circuit CET42 (GN/VT)
      GF0041451Courtesy of FORD MOTOR CO.
    • Measure the voltage between transaxle main valve body vehicle harness C1534-7, circuit CET42 (GN/VT) and ground.
      • Fig 2: Measuring Voltage Between Transaxle Main Valve Body Vehicle Harness C1534-2, Circuit CET43 (GY)
      GF0041452Courtesy of FORD MOTOR CO.
    • Measure the voltage between transaxle main valve body vehicle harness C1534-2, circuit CET43 (GY) and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  D4.
    2. NO  : Go to  D5.
  4. D4 CHECK THE TRANSAXLE MAIN VALVE BODY VEHICLE HARNESS FOR A SHORT TO POWER 
    • Key in OFF position.
    • Disconnect: TCM C2352B
    • Key in ON position.
      • Fig 3: Measuring Voltage Between Transaxle Main Valve Body Vehicle Harness C1534-7, Circuit CET42 (GN/VT)
      GF0041451Courtesy of FORD MOTOR CO.
    • Measure the voltage between transaxle main valve body vehicle harness C1534-7, circuit CET42 (GN/VT) and ground.
      • Fig 4: Measuring Voltage Between Transaxle Main Valve Body Vehicle Harness C1534-2, Circuit CET43 (GY)
      GF0041452Courtesy of FORD MOTOR CO.
    • Measure the voltage between transaxle main valve body vehicle harness C1534-2, circuit CET43 (GY) and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : REPAIR the circuit for a short to power. TEST the system for normal operation.
    2. NO  : INSTALL a new TCM. TEST the system for normal operation.
  5. D5 CHECK THE ELECTRICAL SIGNAL 
      Fig 5: Measuring Voltage
      GF0029726Courtesy of FORD MOTOR CO.
    • Measure the voltage between transaxle main valve body vehicle harness C1534-7, circuit CET42 (GN/VT) and transaxle vehicle harness C1534-2, circuit CET43 (GY).
    • START vehicle.
    • Activate solenoids (ON and OFF) while monitoring the voltage reading.
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger Mode
    • Select PCA PID.
    • Select a value 50-150 psi.
    • Select another value 50-150 psi.
    • Does the voltage change? 
    1. YES  : Go to  D6.
    2. NO  : CHECK for open or short circuit in harness or TCM.
  6. D6 CHECK THE TRANSAXLE MAIN VALVE BODY INTERNAL HARNESS FOR A SHORT TO GROUND 
    • Key in OFF position.
    • Disconnect: Pressure Control Solenoid A (PCA) Solenoid Electrical Connector
      • Fig 6: Measuring Resistance Between Transaxle Main Valve Body Internal Harness C1534-2
      GF0041453Courtesy of FORD MOTOR CO.
    • Measure the resistance between transaxle main valve body internal harness C1534-2 (component side, transaxle internal harness), and ground.
      • Fig 7: Measuring Resistance Between Transaxle Main Valve Body Internal Harness C1534-7
      GF0041454Courtesy of FORD MOTOR CO.
    • Measure the resistance between transaxle main valve body internal harness C1534-7 (component side, transaxle internal harness), and ground.
    • Are the resistances greater than 10,000 ohms? 
    1. YES  : Go to  D7.
    2. NO  : INSTALL a new transaxle main valve body internal harness. TEST the system for normal operation.
  7. D7 CHECK THE TRANSAXLE MAIN VALVE BODY INTERNAL HARNESS FOR AN OPEN 
      Fig 8: Measuring Resistance Between Transaxle Main Valve Body Internal Harness PCA Connector Pin 2
      GF0041455Courtesy of FORD MOTOR CO.
    • Measure the resistance between transaxle main valve body internal harness PCA connector pin 2 (component side, transaxle internal harness), and transaxle main valve body internal harness C1534-2.
      • Fig 9: Measuring Resistance Between Transaxle Main Valve Body Internal Harness PCA Connector Pin 7
      GF0041456Courtesy of FORD MOTOR CO.
    • Measure the resistance between transaxle main valve body internal harness PCA connector pin 7 (component side, transaxle internal harness), and transaxle main valve body internal harness C1534-7.
    • Are the resistances less than 5 ohms? 
    1. YES  : Go to  D8.
    2. NO  : INSTALL a new transaxle main valve body internal harness. TEST the system for normal operation.
  8. D8 CHECK SOLENOID RESISTANCE AT THE SOLENOID 
    • Key in OFF position.
    • Measure and record the resistance between PCA solenoid pins.
    • Is the resistance between 2.4 and 7.3 ohms? 
    1. YES  : Go to  D9.
    2. NO  : INSTALL a new PCA solenoid. TEST the system for normal operation.
  9. D9 CHECK THE SOLENOID FOR A SHORT TO GROUND 
    • Measure and record the resistance between the PCA solenoid and the solenoid body.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : REFER to Diagnosis By Symptom  for diagnosis of pressure concerns. TEST the system for normal operation.
    2. NO  : INSTALL a new PCA solenoid. TEST the system for normal operation.
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