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Home >> Ford >> 2005 >> Escape Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Four-Wheel Drive Systems) >> Diagnosis And Testing >> Four-Wheel Drive Systems >> Functional Test >> PINPOINT TEST A: Road Test

PINPOINT TEST A: Road Test

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  1. A1 CHECK FOR 4WD INDICATOR PROVE-OUT 
    • Start the vehicle and observe the 4WD indicator.
    • Does the 4WD indicator illuminate for three seconds and then turn OFF? 
    • Yes  : GO to A2.
    • No  : REFER to INSTRUMENT CLUSTER for further diagnosis of the instrument cluster.
  2. A2 CHECK FOR 4WD INDICATOR FLASHING 
    • Allow vehicle to idle for 5 minutes.
    • Observe the 4WD indicator.
    • Does the 4WD indicator flash? 
    • Yes  : GO to PINPOINT TEST H .
    • No  : Allow vehicle engine to continue idling. GO to A3.
  3. A3 CHECK FOR 4WD INDICATOR ON CONTINUOUSLY 
    • Observe the 4WD indicator.
    • Does the 4WD indicator stay on continuously? 
  4. A4 CHECK FOR VALID THROTTLE POSITION 
    • Key in OFF position.
    • Enter the following diagnostic mode on the diagnostic tool: PID/DATA Monitor and Record.
    • Key in ON position.
    • Monitor the throttle position while opening and closing the throttle.
    • Does the throttle position match the PID value? 
  5. A5 CHECK FOR CORRECT WHEEL SPEEDS 
    • 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? 
  6. A6 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 high throttle).
    • Does the vehicle pulsate or shudder while accelerating? 
  7. A7 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? 
  8. A8 CHECK FOR TORQUE AT THE REAR WHEELS 
    • Enter the following diagnostic mode on the diagnostic tool: Active Commands.
    • 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? 
    • Yes  : The concern can not be duplicated at this time. RETURN the vehicle to the customer.
    • No  : GO to PINPOINT TEST G .
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