DTC P186D-97: Clutch Actuator Stuck - Component or system operation obstructed or blocked: Action

NOTE: If additional rear differential related DTCs are also set, perform the relevant corrective action(s) first

Refer to the appropriate system wiring diagrams and check the rear differential actuator circuit for short circuit to ground, short circuit to power, open circuit, high resistance (>1.8 Ohms)
Using the manufacturer approved diagnostic system, perform the guided diagnostic routine. Clear the DTCs and retest. If fault persists, install a new rear differential actuator