GEAR in Drive Mode

This OSC function is used to test the transaxle shift functions.

NOTE: When the technician commands 1st gear during OSC mode, engine braking is automatically activated for 1st gear. Be aware that normal transaxle operation does not use engine braking in 1st gear.

The OSC function for the GEAR parameter allows the technician to choose the following options:

1 - PCM selects 1st gear.
2 - PCM selects 2nd gear.
3 - PCM selects 3rd gear.
4 - PCM selects 4th gear.

OSC "GEAR" Mode operates ONLY when:

VSS and TR sensor are operational.
No VSS and TR sensor DTCs.
Engine "ON."
Transaxle range selector lever in O/D.
Vehicle speed is greater than 3 km/h (2 mph).
Gear selected is equal to or below maximum gear available (PID "GEARTOP").
Torque converter clutch must be commanded OFF (PID "TCC"-0 percent or OFF).
Maximum vehicle speed for downshift into 1st gear is 40 km/h (25 mph).
Maximum vehicle speed for downshift into 2nd gear is 97 km/h (60 mph).
Maximum vehicle speed for downshift into 3rd gear is 204 km/h (127 mph).
Minimum vehicle speed for an upshift to 4th gear is 32 km/h (20 mph).

OSC Command Values:

1 - PCM selects 1st gear.
2 - PCM selects 2nd gear.
3 - PCM selects 3rd gear.
4 - PCM selects 4th gear.
XXX - cancels OSC sent value.
SEND - sends the values to PCM.