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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 1665 (Automatic Transaxle - AISIN Aw21) >> Diagnosis And Testing >> Pinpoint Tests - OSC Equipped Vehicle >> Pinpoint Tests >> Pinpoint Test E: Park Neutral Signal

Pinpoint Test E: Park Neutral Signal

WARNING: This page is about a different car, the 2011 Lincoln MKZ and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Refer to the Transaxle Vehicle Harness Connector illustrations within the TRANSAXLE CONNECTOR LAYOUTS  procedure in this service information.
  1. E1 CHECK RESISTANCE ON CIRCUIT CET40 (GN/OG) 
    • Disconnect: PCM C175B.
    • Selector lever in PARK or NEUTRAL.
    • Measure the resistance between C175B-16, circuit CET40 (GN/OG) and chassis ground.
      Fig 1: Measuring Resistance Between C175B-16, Circuit CET40 (GN/OG) And Chassis Ground
      G07785897Courtesy of FORD MOTOR CO.
    • Is the resistance between 13 to 40 ohms? 
      • Yes  : GO to E2  .
      • No  : GO to  E3.
  2. E2 CHECK RESISTANCE ON CIRCUIT CET40 (GN/OG) 
    • Selector lever in REVERSE, DRIVE or M.
    • Measure the resistance between C175B-16, circuit CET40 (GN/OG) and chassis ground.
      Fig 2: Measuring Resistance Between C175B-16, Circuit CET40 (GN/OG) And Chassis Ground
      G07785898Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 1000 ohms? 
      • Yes  : INSTALL a new TCM. After installing the new TCM, VERIFY that the starting system is operating correctly. If not, REFER to ENGINE COOLING SYSTEM (EXCEPT HYBRID) article to check starting system.
      • No  : GO to E3  .
  3. E3 CHECK VEHICLE HARNESS CIRCUIT CET40 (GN/OG) FOR AN OPEN 
    • Disconnect: Transmission Control Module (TCM) C1533.
    • Measure the resistance between C1533-5, circuit CET40 (GN/OG) and C175B-16.
      Fig 3: Measuring Resistance Between C1533-5, Circuit CET40 (GN/OG) And C175B-16
      G07785899Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
      • Yes  : GO to E4  .
      • No  : REPAIR circuit CET40 (GN/OG) for an open.
  4. E4 CHECK VEHICLE HARNESS CIRCUIT CET40 (GN/OG) FOR A SHORT TO GROUND 
    • Measure the resistance between C1533-5, circuit CET40 (GN/OG) and chassis ground.
      Fig 4: Measuring Resistance Between C1533-5, Circuit CET40 (GN/OG) And Chassis Ground
      G07785900Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
      • Yes  : INSTALL a new PCM. After installing the new PCM, VERIFY that the starting system is operating correctly. If not, REFER to ENGINE COOLING SYSTEM (EXCEPT HYBRID) article to check starting system.
      • No  : REPAIR circuit CET40 (GN/OG) for a short to ground.
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