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Home >> Ford >> 2006 >> Focus ZX5 SE, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 852 (Cruise Control System (F-250-F550)) >> Diagnostic Tests >> Speed Control >> Pinpoint Tests >> Pinpoint Test E: The Speed Control Does Not Disengage When The Clutch Is Applied - Gasoline Vehicles >> Pinpoint Test E: The Speed Control Does Not Disengage When The Clutch Is Applied - Gasoline Vehicles

Pinpoint Test E: The Speed Control Does Not Disengage When The Clutch Is Applied - Gasoline Vehicles

WARNING: This page is about a different car, the 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. E1 CHECK THE CPP SWITCH OUTPUT 
    • Disconnect: PCM C175b
    • Measure the resistance between the PCM C175b-32, circuit 306 (TN/LB), harness side and ground.
      • Fig 1: Checking Continuity Between Connector And Ground
      G03924168Courtesy of FORD MOTOR CO.
    • Is the is the resistance less than 5 ohms? 
    1. YES  : Go to  E2.
    2. NO  : Go to  E3.
  2. E2 CHECK CIRCUIT 306 (TN/LB) FOR A SHORT TO GROUND 
    • Disconnect: CPP Switch C257
    • Measure the resistance between the PCM C175b-32, circuit 306 (TN/LB), harness side and ground.
      • Fig 2: Checking Continuity Between Connector And Ground
      G03924168Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : REPAIR the circuit. TEST the system for normal operation.
    2. NO  : Go to  E3.
  3. E3 CHECK FOR CORRECT PCM OPERATION 
    • Disconnect all the PCM connectors.
    • Check for:
      • corrosion
      • pushed-out pins
    • Connect all the PCM connectors and make sure they are seated correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    1. YES  : INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS - GASOLINE ENGINES article.
    2. NO  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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