Pinpoint Test J : P184A, P184B
WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
- Refer to TWO WHEEL DRIVE/FOUR WHEEL DRIVE SYSTEMS
for schematic and connector information.
Normal Operation and Fault Conditions
The electric shift motor is mounted externally to the transfer case. It drives a rotary cam which moves the range and mode forks within the transfer case. The shift motor moves during shifts in to and out of 4H, 4L, and to Neutral. It does not move during the shift between 2H and 4A. TCCM directly controls the electric shift motor and can reverse motor polarity to reverse rotary cam/shift fork direction. The shift motor sense plate, an integral part of the shift motor assembly, informs the TCCM of the transfer case position.
DTC Fault Trigger Conditions
DTC Description Fault Trigger Condition TCCM P184A:00 Transfer Case Unable To Transition Between 4x2 and 4x4 Mode: No Sub Type Information This DTC sets when target shift motor position is not reached after the maximum number of allowed blocked shift retries for 2H to 4H. TCCM P184B:00 Transfer Case Unable To Transition Between 4x4 High and 4x4 Low Range: No Sub Type Information This DTC sets when target shift motor position is not reached after the maximum number of allowed blocked shift retries for 4H to 4L. Possible Sources
- Transfer case shift motor
- Internal transfer case damage preventing shift motor movement
- J1 CHECK THE TRANSFER CASE SHIFT MOTOR OPERATION
- Remove the transfer case shift motor from the transfer case, leaving the wiring connector connected.
- Observe the transfer case shift motor while switching the ATCM mode from 2H to 4L to 2H.
Does the transfer case shift motor rotate during mode transitions?
Yes DISASSEMBLE, INSPECT, and REPAIR the transfer case as necessary. REFER to: Transfer Case - Raptor, Vehicles With: 2-Speed Torque On Demand Transfer Case . No INSTALL a new transfer case shift motor. REFER to: Transfer Case Shift Motor .