Symptom Chart - Electronic Shift

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.

SYMPTOM CHART - ELECTRONIC SHIFT

Condition	Possible Sources	Action
No communication with the Transfer Case Control Module (TCCM)	Wiring, terminals or connectors Scan tool Data Link Connector (DLC) TCCM	CHECK the module communications network. REFER to MODULE COMMUNICATIONS NETWORK .
The Four-Wheel Drive (4WD) indicators do not operate correctly	Wiring, terminals or connectors 4WD system fault Mode Select Switch (MSS) Instrument Panel Cluster (IPC) TCCM	GO to PINPOINT TEST H .
The vehicle does not shift between 2H and 4H modes correctly	Wiring, terminals or connectors MSS Transfer case Constant Vacuum Hublock (CVH) system Front axle assembly TCCM	GO to PINPOINT TEST I .
The vehicle does not shift between 4H and 4L modes correctly	Digital Transmission Range (TR) sensor ABS wheel speed inputs	GO to PINPOINT TEST J .
The front axle does not engage/disengage correctly	Fuse CVH Wiring, terminals or connectors Vacuum leaks Hublock vacuum solenoid Transfer case Front axle assembly TCCM	GO to PINPOINT TEST K .
Four-Wheel Drive (4WD) does not engage at speed correctly	Wiring, terminals or connectors Transfer case dual-cone synchronizer Front axle assembly TCCM	GO to PINPOINT TEST L .
The transfer case jumps out of gear	MSS CVH Transfer case	GO to PINPOINT TEST M .
Vehicle pulsates or shudders in a straight line (straight line driveline wind up)	Unmatched tire sizes Unequal amounts of tire wear Unequal tire inflation pressures Unmatched front and rear axle ratios Front and rear axles	GO to PINPOINT TEST N .
Clunking noise during 4WD engagement, especially at high speeds	Vehicle speed Torque to the front axle	GO to PINPOINT TEST K .
The transfer case makes noise	Unequal tire inflation pressures Unmatched tire sizes	MAKE SURE that all tires and wheels are the same size and that the inflation pressures are correct.
	Unequal amounts of tire wear	CHECK tire tread wear to see if there is more than 0.15 mm (0.06 in) difference in tread wear between front and rear. INTERCHANGE one front wheel and one rear wheel. ROAD TEST again.
	Internal components	OPERATE the vehicle in all transmission gears. If there is noise in the transmission in NEUTRAL, or in some gears and not in others, REMOVE and REPAIR the transmission. REFER to AUTOMATIC TRANSAXLE/TRANSMISSION - TORQSHIFT or AUTOMATIC TRANSAXLE/TRANSMISSION - TORQSHIFT 6 . If there is noise in all gears, DISASSEMBLE the transfer case. REFER to TRANSFER CASE . CHECK the planetary gears, the bearings, the upper and lower drive sprockets and drive chain for damage. INSTALL new parts as necessary.
	Fluid level	FILL with the specified fluid. REFER to TRANSFER CASE .
Unable to duplicate customer concern	4WD system and/or related components	CARRY OUT the ELECTRONIC SHIFT-ON-THE-FLY (ESOF) FUNCTIONAL TEST . GO to PINPOINT TEST O .