Ranger 4WD V6-183 3.0L (1993)
Control Module: Description and Operation
DESCRIPTION
The electronic shift control module is powered at all times through the ELEC. SHIFT Fuse in the engine compartment fuse/relay box, to retain its
memory capability. Fuse 7, in the fuse panel, provides power for the switches and the electric shift motor.
OPERATION
When either of the two control switches is depressed, the electronic shift control module analyses information from the transfer case shift position
sensor to verify its current position. It also analyzes input information from the speed sensor and the clutch pedal position switch (or park/neutral
position switch, depending upon transmission application). If all the design conditions of the system are met, the electric shift control module
commands the shift motor to execute the desired function. After the shift takes place and the motor is turned off, the electric shift control module
again looks at the inputs from the shift position sensor to determine if the transfer case is in the position that the operator selected. Finally, the
electric shift control module illuminates the push-buttons in the electric shift control switch to indicate that the desired function has been
completed.
The electric shift control module has a self diagnostic capability.
