OSC - Transmission DRIVE MODES

The DRIVE MODE allows control of 3 transmission parameters. Each mode/parameter has a unique set of vehicle operating requirements that the technician must meet before being allowed to operate OSC. The recommended procedure, when using the DRIVE MODE, is to control one parameter at a time.

The DRIVE MODE allows the technician to carry out the following functions on the transmission:

• GEAR - allows upshifts or downshifts.
• TCC - engages or disengages the torque converter clutch.
• FIRM_SFT - Commands a higher control pressure during upshift.

The pressure control (PCx) solenoids for this transmission are not directly controlled during DRIVE MODE testing. Pressures may be raised during an upshift via the harsh shift control channel (FIRM_SFT).