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Home >> Lincoln >> 2014 >> MKS Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 783 (Transfer Case - Four Wheel Drive (4WD) Systems -- F250-F550 Super Duty) >> Diagnostic Tests >> Four Wheel Drive (4WD) Systems - Electronic Shift >> Pinpoint Tests >> Pinpoint Test P: Electronic Shift On The Fly (ESOF) Functional Test >> Pinpoint Test P: Electronic Shift On The Fly (ESOF) Functional Test

Pinpoint Test P: Electronic Shift On The Fly (ESOF) Functional Test

WARNING: This page is about a different car, the 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: 4x4 high/low (4H/4L) is not intended for driving on hard/dry surfaces.
  1. P1 CHECK FOR 4X4 INDICATOR PROVE OUT 
    • Key in ON position.
    • Do the 4x4 indicators illuminate at prove out? 
    1. YES  : Go to  P2.
    2. NO  : CHECK the instrument cluster (IC) for faults. REFER to INSTRUMENT CLUSTER AND PANEL ILLUMINATION article.
  2. P2 CHECK 2WD OPERATION 
    • Stop the vehicle.
    • Transmission in NEUTRAL.
    • Switch the MSS to 2H.
    • Do the 4x4 indicators turn off? 
    1. YES  : Go to  P4.
    2. NO  : Go to  P3.
  3. P3 CHECK FOR DTCs 
    • Transmission in PARK.
    • Release the brake pedal.
    • Connect the diagnostic tool.
    • Carry out the on-demand self-test.
    • Are DTCs retrieved? 
    1. YES  : REFER to the 4X4 Control Module (DTC) Chart.
    2. NO  : Go to  P4.
  4. P4 CHECK FOR WIND-UP IN TURNS IN 2WD 
    • Drive the vehicle on a dry, hard surface while executing turns.
    • Is wind-up present in turns? 
    1. YES  : Go to Pinpoint Test J .
    2. NO  : Go to  P5.
  5. P5 CHECK 4H OPERATION 
    • Stop the vehicle.
    • Transmission in NEUTRAL.
    • Lock the LH and RH PVH.
    • Switch the MSS to 4H.
    • Does the 4H indicator illuminate correctly? 
    1. YES  : Go to  P9.
    2. NO  : Go to  P6.
  6. P6 CHECK FOR DTCs 
    • Transmission in PARK.
    • Release the brake pedal.
    • Connect the diagnostic tool.
    • Carry out the on-demand self test.
    • Are DTCs retrieved? 
    1. YES  : REFER to the 4X4 Control Module (DTC) Chart.
    2. NO  : Go to  P7.
  7. P7 CHECK 4H WIND-UP IN TURNS 
    • Drive the vehicle in 4H while executing turns.
    • Is wind-up present? 
    1. YES  : Go to  P8.
    2. NO  : Go to Pinpoint Test J .
  8. P8 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? 
    1. YES  : Go to Pinpoint Test N .
    2. NO  : Go to  P9.
  9. P9 CHECK FOR LH AND RH PVH DISENGAGEMENT 
    NOTE: The engine must be at idle during the following steps to supply vacuum for PVH engagement/disengagement.
    • 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? 
    1. YES  : Go to Pinpoint Test I .
    2. NO  : Go to  P10.
  10. P10 CHECK FOR PVH VACUUM LEAKS 
    • Key in OFF position.
    • Disconnect both vacuum lines from the PVH solenoid assembly.
    • Using a vacuum pump, apply 508 mm (20 in) Hg of vacuum to the PVH apply vacuum circuit.
    • Observe the vacuum reading.
    • Did the vacuum drop more than 25 mm (0.98 in) Hg per minute? 
    1. YES  : CHECK the PVH and related components for leaks. Go to Pinpoint Test I 
    2. NO  : Go to  P11.
  11. P11 CHECK 4L OPERATION 
    • Bring the vehicle to a speed below 3 kph (3 mph). With the brake pedal applied and the transmission in NEUTRAL (or clutch applied), switch the MSS to 4L.
    • Does the 4L indicator illuminate correctly? 
    1. YES  : Go to  P13.
    2. NO  : Go to  P12.
  12. P12 CHECK FOR DTCs 
    • Transmission in PARK.
    • Release the brake pedal.
    • Connect the diagnostic tool.
    • Carry out the on-demand self test.
    • Are DTCs retrieved? 
    1. YES  : REFER to the 4X4 Control Module (DTC) Chart.
    2. NO  : Go to  P13.
  13. P13 CHECK FOR 4L WIND-UP IN TURNS 
    • Drive the vehicle on a dry, hard surface while turning.
    • Is wind-up present and 4L operating? 
    1. YES  : Go to  P14.
    2. NO  : CHECK for 4X4 control module DTCs. REFER to Inspection and Verification. If no DTCs are present, go to Pinpoint Test K .
  14. P14 CHECK FOR STRAIGHTLINE WIND-UP IN 4L 
    • Drive the vehicle in 4L while driving in a straight line.
    • Is wind-up present? 
    1. YES  : Go to Pinpoint Test O .
    2. NO  : Go to  P15.
  15. P15 CHECK 4L TO 2H SHIFT 
    • With the vehicle at a stop, brake applied and transmission in NEUTRAL, switch the MSS from 4L to 2H.
    • Do the 4WD indicators turn off? 
    1. YES  : Go to  P17.
    2. NO  : Go to  P16.
  16. P16 CHECK FOR DTCs 
    • Transmission in PARK.
    • Release the brake pedal.
    • Connect the diagnostic tool.
    • Carry out the on-demand self test.
    • Are DTCs retrieved? 
    1. YES  : REFER to the 4X4 Control Module (DTC) Chart.
    2. NO  : Go to  P17.
  17. P17 CHECK FOR WIND-UP IN TURNS IN 2WD 
    • Drive the vehicle on a dry, hard surface while executing turns.
    • Is wind-up present in turns? 
    1. YES  : Go to Pinpoint Test K .
    2. NO  : Go to  P18.
  18. P18 CHECK FOR LH AND RH PVH DISENGAGEMENT 
    NOTE: The engine must be at idle during the following steps to supply vacuum for PVH engagement/disengagement.
    • 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? 
    1. YES  : Go to Pinpoint Test I .
    2. NO  : Go to  P19.
  19. P19 CHECK FOR PVH VACUUM LEAKS 
    • Key in OFF position.
    • Disconnect both vacuum lines from the PVH solenoid assembly.
    • Using a vacuum pump, apply 508 mm (20 in) Hg of vacuum to the PVH apply vacuum circuit.
    • Observe the vacuum reading.
    • Did the vacuum drop more than 25 mm (0.98 in) Hg per minute? 
    1. YES  : CHECK the PVH and related components for leaks. Go to Pinpoint Test I .
    2. NO  : Go to  P20.
  20. P20 CHECK FOR 4H OPERATION 
    • 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? 
    1. YES  : The 4WD system is operating correctly.
    2. NO  : Go to Pinpoint Test M .
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