Pinpoint Test M: The Transfer Case Jumps Out Of Gear

WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: When directed to drive the vehicle as part of this test, drive the vehicle on a hard surface in an area without traffic to prevent a crash. Failure to follow these instructions may result in personal injury.

M1 VERIFY THE CONCERN
- Drive the vehicle and attempt to duplicate the concern.
- Is the concern an uncommanded range shift (in or out of low range)?
- Yes : GO to M4.
- No : GO to M2.
M2 CHECK THE MSS POSITION MONITORING THE 4WD SWITCH STATUS (4X4_SW) PID
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: DataLogger - TCCM.
- Drive the vehicle.
- Dynamically monitor the 4X4_SW PID while driving the vehicle in each shift position.
- Does the 4X4_SW PID always agree with the switch position?
- Yes : GO to M3.
- No : GO to PINPOINT TEST I .
M3 CHECK TCCM DTCs
- Enter the following diagnostic mode on the scan tool: Self-Test - TCCM.
- Are any DTCs present?
- Yes : REFER to the Transfer Case Control Module (TCCM) DTC Chart .
- No : CARRY OUT the ELECTRONIC SHIFT-ON-THE-FLY (ESOF) FUNCTIONAL TEST . GO to PINPOINT TEST O .
M4 CHECK THE 4WD INDICATORS
- Stop the vehicle.
- Transmission in NEUTRAL.
- Depress the brake pedal.
- Observe the 4WD indication in the message center while cycling through each MSS position.
- Does the 4WD indicator(s) match the MSS?
- Yes : GO to M2.
- No : GO to M5.
M5 CHECK FOR DTCs
- Transmission in PARK.
- Enter the following diagnostic mode on the scan tool: Self-Test - TCCM.
- Are any DTCs present?
- Yes : REFER to the Transfer Case Control Module (TCCM) 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 .