Pinpoint Test M: The 4WD System Jumps Out Of Gear
WARNING: This page is about a different car, the 2010 Ford Pickup, 2010 Ford F550 Super Duty, 2010 Ford F450 Super Duty, and 2010 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
- M1 VERIFY THE CONCERN
- Drive the vehicle and attempt to duplicate the concern.
- Is the concern an uncommanded mode shift (in or out of 4X4 Low)?
- Yes: GO to M4.
- No: GO to M2 .
- M2 CHECK THE MSS POSITION PIDs
- Connect the scan tool.
- Drive the vehicle.
- Dynamically monitor the MSS PID 4WD_SW while driving the vehicle in each shift position.
- Does the MSS PID always agree with the MSS position?
- Yes: GO to M3 .
- No: GO to PINPOINT TEST I .
- M3 CHECK FOR DTCs
- Carry out the on-demand self test.
- Are DTCs present?
- Yes: REFER to the 4X4 CONTROL MODULE DTC CHART .
- No: GO to PINPOINT TEST P .
- M4 CHECK THE 4X4 INDICATORS
- With the vehicle rolling, shift the transmission to NEUTRAL.
- Observe the 4X4 indicators in the Instrument Cluster (IC) while cycling through each MSS position.
- Do the 4X4 indicators match MSS positions?
- Yes: GO to M2.
- No: GO to M5 .
- M5 CHECK FOR DTCs
- Transmission in PARK.
- Carry out the on-demand self test.
- Are DTCs present?
- Yes: REFER to the 4X4 CONTROL MODULE DTC CHART .
- 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 .