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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 E: Electronic PCB

Pinpoint Test E: Electronic PCB

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 5th Gear 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. E1 ELECTRONIC DIAGNOSTICS SETUP 
    • Key in OFF position.
    • Select PARK.
    • Check to make sure the 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.
    • Key in START position.
    • 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  E2 .
    2. NO  : REPEAT procedure to ENTER DataLogger Mode. If vehicle did not enter DataLogger Mode, REFER to Introduction - Gasoline Engines article for diagnosis of Transmission Control Module (TCM).
  2. E2 SOLENOID FUNCTIONAL TEST 
    • Select PCB PID.
    • Increase engine speed above 1,500 RPM.
    • Select value: 50, 70, 90, 110, 130 or 150 psi.
    • Monitor the Transmission Fluid Pressure Gauge and 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  E3.
  3. E3 CHECK THE TRANSAXLE 5TH GEAR VALVE BODY VEHICLE HARNESS AND TCM FOR A SHORT TO POWER 
    • Key in OFF position.
    • Disconnect: Transaxle 5th Gear Valve Body Vehicle Harness C1535
    • Visually inspect all wires and connectors for damage.
    • Key in ON position.
      • Fig 1: Checking Electrical Signal
      GF0029729Courtesy of FORD MOTOR CO.
    • Measure the voltage between transaxle 5th gear valve body vehicle harness C1535-2, circuit CET45 (YE/BU) and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  E4.
    2. NO  : Go to  E5.
  4. E4 CHECK THE TRANSAXLE 5TH GEAR VALVE BODY VEHICLE HARNESS C1535 FOR A SHORT TO POWER 
    • Key in OFF position.
    • Disconnect: TCM C2352A
    • Key in ON position.
      • Fig 2: Checking Electrical Signal
      GF0029729Courtesy of FORD MOTOR CO.
    • Measure the voltage between transaxle 5th gear valve body vehicle harness C1535-2, circuit CET45 (YE/BU) and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : REPAIR circuit CET45 (YE/BU) for a short to power. TEST the system for normal operation.
    2. NO  : INSTALL a new TCM. TEST the system for normal operation.
  5. E5 CHECK THE ELECTRICAL SIGNAL 
      Fig 3: Checking Electrical Signal
      GF0029729Courtesy of FORD MOTOR CO.
    • Measure the voltage between transaxle 5th gear valve body vehicle harness C1535-2, circuit CET45 (YE/BU) and ground.
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger Mode
    • Select PCB PID.
    • Monitor the voltage reading.
    • Select a value 50-150 psi.
    • Select another value 50-150 psi.
    • Does the voltage change? 
    1. YES  : Go to  E6.
    2. NO  : CHECK for open or short circuit in harness or TCM.
  6. E6 CHECK THE PCB TRANSAXLE INTERNAL HARNESS FOR A SHORT TO GROUND 
    • Key in OFF position.
    • Disconnect: Pressure Control Solenoid B (PCB) Solenoid Electrical Connector
      • Fig 4: Checking Transaxle Internal Harness For A Short To Ground
      GF0029730Courtesy of FORD MOTOR CO.
    • Measure the resistance between transaxle 5th gear valve body vehicle harness C1535-2, (component side, transaxle internal harness), and ground.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  E7.
    2. NO  : INSTALL a new transaxle internal harness. TEST the system for normal operation.
  7. E7 CHECK THE TRANSAXLE INTERNAL HARNESS FOR AN OPEN 
      Fig 5: Measuring Resistance Between Transaxle C1535-2 & PCB Component Side
      GF0041457Courtesy of FORD MOTOR CO.
    • Measure the resistance between transaxle C1535-2, and PCB component side transaxle 5th gear valve body internal harness pin 2.
      • Fig 6: Measuring Resistance Between Ground & PCB Component Connector Pin 3
      GF0041458Courtesy of FORD MOTOR CO.
    • Measure the resistance between ground and PCB component connector pin 3.
    • Are the resistances less than 5 ohms? 
    1. YES  : Go to  E8.
    2. NO  : INSTALL a new transaxle internal harness. TEST the system for normal operation.
  8. E8 CHECK SOLENOID RESISTANCE AT THE SOLENOID 
    • Key in OFF position.
    • Measure and record the resistance between PCB solenoid pins.
    • Is the resistance between 2.4 and 7.3 ohms? 
    1. YES  : Go to  E9.
    2. NO  : INSTALL a new PCB solenoid. TEST the system for normal operation.
  9. E9 CHECK THE SOLENOID FOR A SHORT TO GROUND 
    • Measure and record the resistance between the PCB 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 PCB solenoid. TEST the system for normal operation.
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