LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 2009 >> Escape Base, 2.5 7, AWD, Automatic >> Repair and Diagnosis (Single Page) >> Transmission >> Transmission Control Systems >> Four-Wheel Drive (4WD) System - Diagnostics >> Diagnosis And Testing >> Four Wheel Drive (4WD) Systems >> Pinpoint Tests >> Pinpoint Test A: All-Wheel Drive (AWD) System Functional Test >> PINPOINT TEST A: All-Wheel Drive (AWD) SYSTEM FUNCTIONAL TEST
April 5, 2026: LEMON Manuals is launched! Read the announcement.

PINPOINT TEST A: All-Wheel Drive (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.
NOTE: Carry out a thorough inspection and verification as outlined before carrying out this pinpoint test. Refer to INSPECTION AND VERIFICATION .
  1. A1 CHECK FOR WRENCH LIGHT PROVE-OUT 
    • Turn the ignition to the ON position and observe the wrench light.
    • Does the wrench light illuminate for 3 seconds and then turn OFF? 
  2. A2 CHECK FOR ATC SOLENOID (PART OF REAR AXLE) LOCK 
    • Drive the vehicle on a dry, hard surface in turns while applying the accelerator pedal.
    • Is driveline wind-up present in turns? 
    • Yes:  With the ignition switch in ON position, allow the Active Torque Coupling (ATC) solenoid 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 E .
    • No:  GO to A3  .
  3. A3 CHECK FOR VALID ACCELERATOR PEDAL POSITION MONITORING THE ACCELERATOR PEDAL POSITION (AP) PID 
    • Enter the following diagnostic mode on the scan tool: DataLogger - 4X4 Control Module.
    • Monitor the AP PID while pressing the accelerator pedal.
    • Does the accelerator pedal position match the AP PID percent value? 
  4. A4 CHECK 4X4 CONTROL MODULE WHEEL SPEED SENSOR PIDs 
    • Enter the following diagnostic mode on the scan tool: DataLogger - 4X4 Control Module.
    • 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? 
  5. A5 CHECK 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? 
  6. A6 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? 
  7. A7 CHECK FOR TORQUE AT REAR WHEELS USING PWM OUTPUT CONTROL COMMAND #1 (CLCH___SOL) ACTIVE COMMAND 
    • Enter the following diagnostic mode on the scan tool: DataLogger - 4X4 Control Module.
    • Using the scan tool, command CLCH___SOL to energize the ATC solenoid 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:  END the active command. The concern can not be duplicated at this time. RETURN the vehicle to the customer.
    • No:  END the active command. CHECK that the driveshaft rotates when the transaxle is in gear. If yes, GO to PINPOINT TEST D . If no, CHECK the Power Transfer Unit (PTU). REFER to TRANSFER CASE-POWER TRANSFER UNIT (PTU) .
scientia non olet · About LEMON Manuals