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

WARNING: This page is about a different car, the 2006 Ford Pickup, 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 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.

P1 CHECK FOR 4X4 INDICATOR PROVE OUT
- Key in ON position.
- Do the 4x4 indicators illuminate at prove out?
Yes : GO to P2.

No : CHECK the instrument cluster for faults. REFER to INSTRUMENT CLUSTER AND PANEL ILLUMINATION .
P2 CHECK 2WD OPERATION
- Stop the vehicle.
- Transmission in NEUTRAL.
- Switch the MSS to 2H.
- Do the 4WD indicators turn off?
Yes : GO to P4.

No : GO to P3.
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?
Yes : REFER to the FOUR-WHEEL DRIVE (4WD) DIAGNOSTIC TROUBLE CODE (DTC) INDEX .

No : GO to P4.
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?
Yes : GO to PINPOINT TEST J .

No : GO to P5.
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?
Yes : GO to P9.

No : GO to P6.
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?
Yes : REFER to the FOUR-WHEEL DRIVE (4WD) DIAGNOSTIC TROUBLE CODE (DTC) INDEX .

No : GO to P7.
P7 CHECK 4H WIND-UP IN TURNS
- Drive the vehicle in 4H while executing turns.
- Is wind-up present?
Yes : GO to P8.

No : GO to PINPOINT TEST J .
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?
Yes : GO to PINPOINT TEST N .

No : GO to P9.
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 universal joint.
- Rotate the RH front tire one revolution forward and one revolution backward while observing the RH front axle shaft and universal joint.
- Does the LH or RH front axle shaft rotate?
Yes : GO to PINPOINT TEST I .

No : GO to P10.
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?
Yes : CHECK the PVH and related components for leaks. GO to PINPOINT TEST I .

No : GO to P11.
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?
Yes : GO to P13.

No : GO to P12.
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?
Yes : REFER to the FOUR-WHEEL DRIVE (4WD) DIAGNOSTIC TROUBLE CODE (DTC) INDEX .

No : GO to P13.
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?
Yes : GO to P14.

No : CHECK for 4WD control module (GEM) DTCs. REFER to INSPECTION AND VERIFICATION . If no DTCs are present, GO to PINPOINT TEST K .
P14 CHECK FOR STRAIGHTLINE WIND-UP IN 4L
- Drive the vehicle in 4L while driving in a straight line.
- Is wind-up present?
Yes : GO to PINPOINT TEST O .

No : GO to P15.
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?
Yes : GO to P17.

No : GO to P16.
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?
Yes : REFER to the FOUR-WHEEL DRIVE (4WD) DIAGNOSTIC TROUBLE CODE (DTC) INDEX .

No : GO to P17.
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?
Yes : GO to PINPOINT TEST K .

No : GO to P18.
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 universal joint.
- Rotate the RH front tire one revolution forward and one revolution backward while observing the RH front axle shaft and universal joint.
- Does the LH or RH front axle shaft rotate?
Yes : GO to PINPOINT TEST I .

No : GO to P19.
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?
Yes : CHECK the PVH and related components for leaks. GO to PINPOINT TEST I .

No : GO to P20.
P20 CHECK FOR PVH VACUUM LEAKS
- 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 4x4 system is operating correctly.

No : GO to PINPOINT TEST M .