FIRM_SFT Mode (Drive Mode)

This OSC mode is used to raise pressure during an upshift to determine whether pressure control system is functioning correctly. Harsher shifts indicate that pressure control system works at higher pressure. The best test for isolating pressure control system problems is to perform PC-A, PC-B or PC-C tests in BENCH MODE, using a hydraulic pressure gauge. See PC-A, PC-B & PC-C SOLENOIDS (BENCH MODE)  .

OSC COMMAND VALUES allow for the following options:

1. (ON)  - Sets control pressure higher for all upshifts.
2. (OFF)  - Sets control pressure to normal for all upshifts.
3. (XXX)  - Cancels FIRM_SFT MODE.

OSC FIRM_SFT DRIVE MODE operates ONLY when VSS and digital TR sensor is okay, no VSS or digital TR sensor DTCs are present, engine is running, gearshift lever is in "D" or "D5" position, vehicle speed is more than 2 MPH and when TCC is off (disengaged). Perform the following procedure for FIRM_SFT MODE:

• Select OUTPUT STATE CONTROL.
• Select TRANS-DRIVE MODE.
• Select PIDs to be monitored.
• Monitor all selected PIDs during test.
• Select "Parameters - FIRM_SFT.
• Select OSC COMMAND VALUE (On or Off), then press SEND.
• Select "XXX", then press SEND at any time to cancel any command sent.