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Home >> Ford >> 2006 >> Focus ZX5 SE, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1180 (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 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 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 TRANSAXLE CONNECTOR LAYOUTS  procedure.
  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) & Chassis Ground
      G06263918Courtesy 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) & Chassis Ground
      G06263918Courtesy 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 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) & C175B-16
      G06263920Courtesy 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) & Chassis Ground
      G06263921Courtesy 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 to check starting system.
    • No:  REPAIR circuit CET40 (GN/OG) for a short to ground.
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