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Home >> Ford >> 2015 >> Flex SEL, AWD >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> Four Wheel Drive (4WD) Systems >> Diagnosis And Testing >> All Wheel Drive (AWD) Systems >> Pinpoint Tests >> Pinpoint Test A: AWD System Functional Test >> Pinpoint Test A : AWD System Functional Test

Pinpoint Test A : AWD System Functional Test

    WARNING: When directed to drive the vehicle as part of this test, drive the vehicle on a hard surface in an area without traffic to prevent a crash. Failure to follow these instructions may result in personal injury.

  2. A1 CHECK FOR ATC SOLENOID LOCK

    • Drive the vehicle on a dry, hard surface in turns while applying the accelerator pedal.

    Is driveline wind-up present in turns? 

    Yes  Keep the engine OFF for at least 10 minutes then repeat the test. CHECK again for wind-up. If no wind-up is found, GO to  A3. If still present, GO to Pinpoint Test E .
    No  GO to  A2.

  3. A2 CHECK THE ACCELERATOR PEDAL FUNCTION

    • Connect the scan tool.
    • Ignition ON.
    • Monitor the APP PID while pressing the accelerator pedal.

    Does the accelerator pedal position match the APP PID percent value? 

    Yes  GO to  A3.
    No  REFER to ENGINE CONTROLS - INTRODUCTION (EXCEPT DIESEL & HYBRID) to diagnose the accelerator pedal position sensor concern.

  4. A3 CHECK ABS WHEEL SPEED SENSOR PIDS

    • Connect the scan tool.
    • Ignition ON.
    • While driving the vehicle at 48 km/h (30 mph), monitor the following wheel speed sensor PIDs:
      • Left Front Wheel Speed Sensor (LF_WSPD)
      • Left Rear Wheel Speed Sensor (LR_WSPD)
      • Right Front Wheel Speed Sensor (RF_WSPD)
      • Right Rear Wheel Speed Sensor (RR_WSPD)

    Are all 4 wheel speeds within 2 km/h (1.2 mph) of each other? 

    Yes  GO to  A4.
    No  REFER to Anti-Lock Brake System (ABS) and Stability .

  5. A4 CHECK VEHICLE ACCELERATION IN A STRAIGHT LINE

    • Perform 3 accelerations from 0-48 km/h (0-30 mph) in a straight line (1 each with low, medium and full accelerator pedal application).

    Does the vehicle pulsate or shudder while accelerating? 

    Yes  GO to Pinpoint Test E .
    No  GO to  A5.

  6. A5 CHECK VEHICLE TURNING ABILITY

    • Drive the vehicle in a fully locked turn, on dry pavement, at 8 km/h (5 mph).

    Does the vehicle bind in the turn or resist turning? 

    Yes  GO to Pinpoint Test E .
    No  GO to  A6.

  7. A6 CHECK TORQUE AT THE REAR WHEELS

    • Using the scan tool, energize the ATC solenoid to a constant 90% applied.
    • On dry pavement, drive the vehicle in a fully locked turn at 8 km/h (5 mph).

    Does the vehicle bind in the turn or resist turning? 

    Yes  END the active command. End of System Functional Test.
    No  CHECK the PTU. REFER to Transfer Case Power Transfer Unit (PTU) .
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