Pinpoint Test N: The 4X4 System Jumps Out Of Gear
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.
- N1 VERIFY THE CONCERN
- Drive the vehicle and attempt to duplicate the concern.
- Is the concern an uncommanded range shift (in or out of 4L)?
Yes : GO to N4.
No : GO to N2.
- N2 CHECK THE MODE SELECT SWITCH (MSS) POSITION PIDS
- Key in OFF position.
- Connect the diagnostic tool.
- Key in ON position.
- Drive the vehicle.
- Dynamically monitor the MSS PID while driving the vehicle in each shift position.
- Does the MSS PID always agree with the MSS position?
Yes : GO to N3.
No : GO to PINPOINT TEST J .
- N3 CHECK FOR DTCS
- Carry out the on-demand self test.
- Are DTCs present?
Yes : REFER to the FOUR-WHEEL DRIVE (4WD) DIAGNOSTIC TROUBLE CODE (DTC) INDEX .
No : GO to PINPOINT TEST P .
- N4 CHECK THE 4X4 INDICATORS
- With the vehicle rolling, shift the transmission to NEUTRAL.
- Press the brake pedal.
- Observe the 4x4 indicators in the instrument cluster while cycling through each MSS position.
- Do the 4x4 indicators match MSS positions?
Yes : GO to N2.
No : GO to N5.
- N5 CHECK FOR DTCS
- Transmission in PARK.
- Release the brake pedal.
- Carry out the on-demand self test.
- Are DTCs present?
Yes : REFER to the FOUR-WHEEL DRIVE (4WD) DIAGNOSTIC TROUBLE CODE (DTC) INDEX .
No : CHECK the transfer case fluid level. REFER to TRANSFER CASE . If the fluid level is OK, CHECK for internal transfer case faults. REFER to TRANSFER CASE .