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Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1129 (Four Wheel Drive (4WD) Systems) >> Diagnostic Tests >> Four Wheel Drive (4WD) Systems - All Wheel Drive (AWD) >> Pinpoint Tests >> Pinpoint Test A: Functional Test >> Pinpoint Test A: Functional Test

Pinpoint Test A: Functional Test

WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
  1. A1 CHECK FOR WRENCH LIGHT PROVE-OUT 
    • Start the vehicle and observe the wrench light.
    • Does the wrench light illuminate for 3 seconds and then turn OFF? 
    1. YES  : Go to  A2.
    2. NO  : REFER to INSTRUMENT CLUSTER for further diagnosis of the instrument cluster (IC).
  2. A2 CHECK FOR ACTIVE TORQUE COUPLING LOCK 
    • Drive the vehicle on a dry, hard surface in turns while applying the accelerator pedal.
    • Is driveline wind-up present in turns? 
    1. YES  : Allow the active torque coupling to cool down for at least 10 minutes and repeat the test. CHECK for wind-up again. If no wind-up is found, go to  A3; if still present, go to Pinpoint Test G .
    2. NO  : Go to  A3.
  3. A3 CHECK FOR VALID ACCELERATOR PEDAL POSITION 
    • Enter the diagnostic mode on the scan tool. View 4X4 control module PID: AP.
    • Monitor the accelerator pedal position while pressing the accelerator pedal.
    • Does the accelerator pedal position match the PID value? 
    1. YES  : Go to  A4.
    2. NO  : REFER to the Introduction - Gasoline Engines .
  4. A4 CHECK FOR CORRECT WHEEL SPEEDS 
    • View 4X4 control module PID: WSPD. Monitor the wheel speed PIDs while driving the vehicle at a constant speed of 48 km/h (30 mph).
    • Are all 4 wheel speeds within 3 km/h (1.8 mph) of each other? 
    1. YES  : Go to  A5.
    2. NO  : Go to Pinpoint Test H .
  5. A5 CHECK THE VEHICLE ACCELERATION IN A STRAIGHT LINE 
    • Carry out 3 accelerations from 0-48 km/h (0-30 mph) in a straight line (one each with low, medium and full accelerator pedal application).
    • Does the vehicle pulsate or shudder while accelerating? 
    1. YES  : Go to Pinpoint Test G .
    2. NO  : Go to  A6.
  6. A6 CHECK THE 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? 
    1. YES  : Go to Pinpoint Test G .
    2. NO  : Go to  A7.
  7. A7 CHECK FOR TORQUE AT THE REAR WHEELS 
    • Enter the diagnostic mode on the scan tool. View 4X4 control module PID: CLCH SOL.
    • Command the active torque coupling to a constant 100% applied.
    • 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? 
    1. YES  : The concern can not be duplicated at this time. RETURN the vehicle to the customer.
    2. NO  : CHECK the power transfer unit (PTU), go to Pinpoint Test F .
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