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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 140 (Automatic Transmission -- F250-F550 Super Duty) >> Diagnosis And Testing >> Pinpoint Tests - OSC Equipped Vehicle >> Testing >> Pinpoint Test E: PC-A (Line Pressure) Solenoid

Pinpoint Test E: PC-A (Line Pressure) Solenoid

WARNING: This page is about a different car, the 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: This test should only be used if DTCs P0748, P0960, P0962 or P0963 are present.
NOTE: Refer to the TRANSMISSION VEHICLE HARNESS CONNECTOR  illustration preceding these pinpoint tests.
NOTE: Refer to the TRANSMISSION INTERNAL HARNESS CONNECTOR  illustration preceding these pinpoint tests.
  1. E1 CHECK VEHICLE HARNESS FOR CONTINUITY 
    • Key in OFF position.
    • Disconnect transmission powertrain control module (PCM) connector.
    • Inspect for damage or pushed out pins, corrosion or loose wires.
    • Disconnect vehicle harness from transmission, inspect for damage or pushed out pins, corrosion or loose wires.
    • Measure resistance between the appropriate pin at the transmission PCM connector, harness side and the signal pin 10 at transmission harness connector.
    • Measure resistance between the appropriate pin at the transmission PCM connector, harness side and the power pins 7, 20, and 24 at the transmission harness connector.
    • Is each resistance less than 5.0 ohms? 
    • Yes  : GO to E2.
    • No  : REPAIR an open. RECONNECT all components. REPEAT Quick Test.
  2. E2 CHECK VEHICLE HARNESS FOR SHORTS TO POWER AND GROUND 
    • Measure resistance between the appropriate pin at the transmission PCM connector, harness side and power pins 7, 20, and 24.
    • Measure resistance between the appropriate pin at the transmission PCM connector, harness side and chassis ground.
    • Is each resistance greater than 10,000 ohms? 
    • Yes  : GO to E3.
    • No  : SERVICE short circuit. RECONNECT all components. REPEAT Quick Test.
  3. E3 CHECK FOR TRANSMISSION INTERNAL HARNESS 
    • Drain the transmission fluid.
    • Remove the transmission fluid pan.
    • Disconnect: Affected solenoid.
    • Measure the resistance between pin 10 transmission bulkhead side and pin 2 at the solenoid connector.
    • Measure the resistance between pins 7, 20 and 24 transmission bulkhead side and pin 1 at each associated solenoid connector.
    • Are the resistances less than 0.5 ohms? 
    • Yes  : GO to E4.
    • No  : INSTALL a new harness. RECONNECT all components. REPEAT Quick Test.
  4. E4 CHECK FOR A SHORT TO GROUND 
    • Measure the resistance between pins 10 harness side and ground.
    • Is the resistance greater than 10,000 ohms? 
    • Yes  : GO to E5.
    • No  : INSTALL a new harness. RECONNECT all components. REPEAT Quick Test.
  5. E5 CHECK THE SOLENOID RESISTANCE AT THE SOLENOID 
    • Measure the resistance between pins 1 and 2 at each solenoid.
    • Is the resistance for PCA solenoid between   5.08-5.80 ohms   ? 
    • Yes  : GO to E6.
    • No  : INSTALL a new solenoid if not within specifications. CLEAR the DTCs. TEST the system for normal operation.
  6. E6 CHECK THE SOLENOID FOR A SHORT TO GROUND 
    • Measure the resistance between pins 1 and 2 at each solenoid and ground.
    • Is the resistance greater than 10,000 ohms? 
    • Yes  : INSTALL a new PCM. If the condition persists. REFER to DIAGNOSIS BY SYMPTOM  for diagnosis of pressure concerns. CLEAR the DTCs. TEST the system for normal operation.
    • No  : INSTALL a new solenoid. CLEAR the DTCs. TEST the system for normal operation.
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