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Home >> Ford >> 2012 >> Explorer Base, 3.5 8, AWD, 6F50 >> Repair and Diagnosis >> External Pages >> Different car >> Section 53 (Four Wheel Drive (4WD) Systems) >> Diagnosis And Testing >> Four Wheel Drive (4WD) Systems - Electronic Shift >> Pinpoint Tests >> Pinpoint Test O: Electronic Shift-On-The-Fly (ESOF) Functional Test >> Pinpoint Test O: ESOF Functional Test

Pinpoint Test O: ESOF Functional Test

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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: 4H (4X4 HIGH) or 4L (4X4 LOW) is not intended for driving on hard/dry surfaces.
  1. O1 CHECK FOR IPC DTCs 
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: Self-Test - IPC.
    • Are any DTCs present? 
  2. O2 CHECK 2H OPERATION 
    • Stop the vehicle.
    • Make sure both CVH dials are in AUTO mode.
    • Transmission in NEUTRAL.
    • Switch the Mode Select Switch (MSS) to 4H then to 2H.
    • Does the IPC 4X4 HIGH indicator turn off and does the message center (if equipped) display 4X2 for approximately 4 seconds? 
    • Yes  : GO to  O4.
    • No  : GO to O3.
  3. O3 CHECK FOR TCCM DTCs 
    • Transmission in PARK.
    • Enter the following diagnostic mode on the scan tool: Self-Test - TCCM.
    • Are DTCs retrieved? 
  4. O4 CHECK FOR WIND UP IN TURNS IN 2H 
    • Make sure both CVH dials are in AUTO mode.
    • Drive the vehicle on a dry, hard surface while executing turns.
    • Is wind up present in turns? 
  5. O5 CHECK 4H OPERATION 
    • Stop the vehicle.
    • Lock the LH and RH CVHs.
    • Transmission in NEUTRAL.
    • Switch the MSS to 4H.
    • Does the IPC 4X4 HIGH indicator illuminate correctly or message center (if equipped) display 4X4 HIGH? 
    • Yes  : GO to  O9.
    • No  : GO to O6.
  6. O6 CHECK FOR RETURN OF TCCM DTCs 
    • Transmission in PARK.
    • Enter the following diagnostic mode on the scan tool: Self-Test - TCCM.
    • Are DTCs retrieved? 
  7. O7 CHECK FOR WIND UP IN TURNS IN 4H 
    • Drive the vehicle in 4H while executing turns.
    • Is wind up and tire scuff present? 
  8. O8 CHECK FOR STRAIGHTLINE WIND UP IN 4H 
    • Drive the vehicle on a dry, hard surface while driving in a straight line.
    • Is wind up present? 
  9. O9 CHECK FOR LH AND RH CVH ENGAGEMENT IN 4H 
    • Switch the MSS to 4H.
    • Make sure both CVH dials are in AUTO mode position.
    • NOTE: The engine must be at idle during the following steps to supply vacuum for CVH engagement.

      With the vehicle in NEUTRAL, position it on a hoist. Refer to JACKING & LIFTING .

    • Start the engine and allow to idle.
    • Rotate the LH front tire one revolution forward and one revolution backward while observing the LH front axle shaft and U-joint.
    • Rotate the RH front tire one revolution forward and one revolution backward while observing the RH front axle shaft and U-joint.
    • Does the LH or RH front axle shaft rotate? 
    • Yes  : GO to  O11.
    • No  : GO to O10.
  10. O10 CHECK FOR CVH VACUUM LEAKS 
    • Ignition OFF.
    • Disconnect both vacuum tubes from the hublock vacuum solenoid.
    • Using a vacuum pump, apply 508 mm (20 in) Hg of vacuum to the CVH vacuum circuit.
    • Observe the vacuum reading.
    • Did the vacuum drop more than 25 mm (0.984 in) Hg per minute? 
    • Yes  : CHECK the CVH and related components for leaks. GO to PINPOINT TEST K .
    • No  : CONNECT the hublock vacuum solenoid vacuum lines and GO to O11.
  11. O11 CHECK 4L OPERATION 
    • Bring the vehicle to a speed below 5 km/h (3 mph). With the transmission in NEUTRAL, switch the MSS to 4L.
    • Does the IPC 4X4 LOW indicator illuminate correctly or message center (if equipped) display 4X4 LOW? 
    • Yes  : GO to  O13.
    • No  : GO to O12.
  12. O12 CHECK FOR TCCM DTCs 
    • Transmission in PARK.
    • Enter the following diagnostic mode on the scan tool: Self-Test - TCCM.
    • Are DTCs retrieved? 
  13. O13 CHECK FOR WIND UP IN TURNS IN 4L 
    • Drive the vehicle on a dry, hard surface while turning.
    • Is wind up and tire scuff present and 4L operating? 
  14. O14 CHECK FOR STRAIGHTLINE WIND UP IN 4L 
    • Drive the vehicle in 4L while driving in a straight line.
    • Is wind up present? 
  15. O15 CHECK 4L TO 2H SHIFT 
    • With the vehicle at a stop and transmission in NEUTRAL, switch the MSS from 4L to 2H.
    • Does the 4X4 LOW indicator turn off or (if equipped)IPC message center display 4X2 for approximately 4 seconds then turn off? 
    • Yes  : GO to  O17.
    • No  : GO to O16.
  16. O16 CHECK FOR TCCM DTCs 
    • Transmission in PARK.
    • Enter the following diagnostic mode on the scan tool: Self-Test - TCCM.
    • Are DTCs retrieved? 
  17. O17 CHECK FOR WIND UP IN TURNS IN 2H 
    • Drive the vehicle on a dry, hard surface while executing turns.
    • Is wind up and tire scuff present in turns? 
  18. O18 CHECK 2H TO 4H SHIFT 
    • Switch the MSS to 2H.
    • Drive the vehicle on the road and shift from 2H to 4H while driving above 32 km/h (20 mph).
    • Does the transfer case shift to 4H satisfactorily? 
    • Yes  : The 4WD system is operating correctly.
    • No  : GO to PINPOINT TEST L .
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