Ranger 2WD V6-245 4.0L VIN X SFI (1997)
Transmission Mode Switch: Description and Operation
Transmission Control Switch
DESCRIPTION:
The transmission control switch (TCS) is a momentary contact switch. When the driver presses the button of the TCS, a signal is sent to the PCM. At
the same time, the PCM also causes the transmission control indicator lamp (TCIL) in the instrument panel to turn on or off.
When the TCS is initially pressed, the PCM disables transmission operation in D position/5th gear. At the same time, coast braking in 1st, 2nd, 3rd
and 4th gears occurs because the coast clutch is applied.
When the button of the TCS is pressed again, the PCM enables 5th gear operation, releases the coast clutch and turns off the TRII
SYMPTOMS:
If the TCS fails with open contacts, no disabling of 5th gear and enabling of coast braking in 1st, 2nd,3rd, and 4th gears in D position is possible.
DIAGNOSTIC TROUBLE CODES:
P1780.
