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

WARNING: This page is about a different car, the 2009 Ford Pickup, 2009 Ford F550 Super Duty, 2009 Ford F450 Super Duty, and 2009 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: 4X4 High or Low is not intended for driving on hard/dry surfaces.

O1 CHECK FOR 4X4 INDICATOR PROVE OUT
- Key in ON position.
- Do the 4X4 indicators illuminate at prove out?
1. YES : Go to O2.
2. NO : CHECK the instrument cluster (IC) for faults. REFER to INSTRUMENT CLUSTER AND PANEL ILLUMINATION article.
O2 CHECK 2WD OPERATION
- Stop the vehicle.
- Transmission in NEUTRAL.
- Switch the MSS to 2WD.
- Do the 4WD indicators turn off?
1. YES : Go to O4.
2. NO : Go to O3.
O3 CHECK FOR DTCs
- Transmission in PARK.
- Release the brake pedal.
- Connect the scan 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 O4.
O4 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 I .
2. NO : Go to O5.
O5 CHECK 4X4 HIGH OPERATION
- Stop the vehicle.
- Transmission in NEUTRAL.
- Lock the LH and RH PVH.
- Switch the MSS to 4X4 High.
- Does the 4X4 High indicator illuminate correctly?
1. YES : Go to O9.
2. NO : Go to O6.
O6 CHECK FOR DTCs
- Transmission in PARK.
- Release the brake pedal.
- Connect the scan 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 O7.
O7 CHECK 4X4 HIGH WIND UP IN TURNS
- Drive the vehicle in 4X4 High while executing turns.
- Is wind up present?
1. YES : Go to O8.
2. NO : Go to Pinpoint Test I .
O8 CHECK FOR STRAIGHT-LINE WIND UP IN 4X4 HIGH
- Drive the vehicle on a dry, hard surface while driving in a straight line.
- Is wind up present?
1. YES : Go to Pinpoint Test M .
2. NO : Go to O9.
O9 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 H .
2. NO : Go to O10.
O10 CHECK FOR PVH VACUUM LEAKS
- Key in OFF position.
- Disconnect both vacuum tubes from the PVH solenoid assembly.
- Using a vacuum pump, apply 508 mm (20 in) Hg of vacuum to the PVH 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 H .
2. NO : Go to O11.
O11 CHECK 4X4 LOW OPERATION
- Bring the vehicle to a speed below 5 km/h (3 mph). With the brake pedal applied and the transmission in NEUTRAL (or clutch applied), switch the MSS to 4X4 Low.
- Does the 4X4 Low indicator illuminate correctly?
1. YES : Go to O13.
2. NO : Go to O12.
O12 CHECK FOR DTCs
- Transmission in PARK.
- Release the brake pedal.
- Connect the scan 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 O13.
O13 CHECK FOR 4X4 LOW WIND UP IN TURNS
- Drive the vehicle on a dry, hard surface while turning.
- Is wind up present and 4X4 Low operating?
1. YES : Go to O14.
2. NO : CHECK for 4X4 control module DTCs. REFER to Inspection and Verification. If no DTCs are present, go to Pinpoint Test J .
O14 CHECK FOR STRAIGHT-LINE WIND UP IN 4X4 LOW
- Drive the vehicle in 4X4 Low while driving in a straight line.
- Is wind up present?
1. YES : Go to Pinpoint Test N .
2. NO : Go to O15.
O15 CHECK 4X4 LOW TO 2WD SHIFT
- With the vehicle at a stop, brake applied and transmission in NEUTRAL, switch the MSS from 4X4 Low to 2WD.
- Do the 4WD indicators turn off?
1. YES : Go to O17.
2. NO : Go to O16.
O16 CHECK FOR DTCs
- Transmission in PARK.
- Release the brake pedal.
- Connect the scan 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 O17.
O17 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 O18.
O18 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 H .
2. NO : Go to O19.
O19 CHECK FOR PVH VACUUM LEAKS
- Key in OFF position.
- Disconnect both vacuum tubes 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 H .
2. NO : Go to O20.
O20 CHECK FOR PVH VACUUM LEAKS
- Switch the MSS to 2WD.
- Drive the vehicle on the road and shift from 2WD to 4X4 High while driving above 32 km/h (20 mph).
- Does the transfer case shift to 4X4 High satisfactorily?
1. YES : The 4X4 system is operating correctly.
2. NO : Go to Pinpoint Test L .