System Description

SHIFT PATTERN CONTROL : System Description


DRIVE MODE SELECTOR





- TCM receives STANDARD mode signal, ECO mode signal, SPORT mode signal, or SNOW mode signal from A/C auto amp. via CAN communication.
- TCM transmits recognized mode and gear shift line select result to ECM via CAN communication (by drive mode select signal and shift schedule signal).
- Drive mode may not actually be shifted because of CAN communication malfunction or other causes, although display on combination meter may indicate that shifting of drive mode is complete by operation of drive mode select switch.
- Priority is given to manual mode, when manual mode is selected by operation of selector lever or paddle shifter while driving in any other drive mode status.

ECO mode
- Driving characteristic is controlled (for decreasing needless acceleration and deceleration, reducing energy consumption, and fixing to ECO gear shift line), so that driving that improves operational fuel efficiency is assisted.
- For gear shift vehicle speed, Vehicle Speed At Which Gear Shifting Occurs.

SPORT mode
- This mode uses a shift schedule (gear shift line) that mainly utilizes the high engine speed zone and improves the driving control characteristic and response. This assists driving that is similar to driving a sports car.

ASC (Adaptive Shift Control)
- When driving on an up/down slope
ASC judges up/down slope according to engine torque data transmitted from the ECM and vehicle speed.
Fixing at 4GR, 5GR or 6GR on an up-slope prevents shift hunting and controls the vehicle to gain optimum driving force. On a down-slope, automatic shift-down to 4GR, 5GR or 6GR controls to gain optimum engine brake.
- When driving on a curve
TCM receives the side G sensor signal from the ABS actuator and electric unit (control unit). It locks to 4GR, 5GR or 6GR position in moderate cornering or to 3GR position in sharp cornering based on this signal. This prevents any upshift and kickdown during cornering, maintaining smooth vehicle travel.






Fail-Safe
If a malfunction occurs in CAN communication between TCM and A/C auto amp., driving mode is maintained for approximately 30 seconds to the mode that is applied when the malfunction occurs. The mode then returns to STANDARD mode when accelerator pedal is released.

MANUAL MODE





- The TCM receives the manual mode signal, non-manual mode signal, manual mode shift up signal, manual mode shift down signal, paddle shifter shift up signal* and paddle shifter shift down signal* from combination meter via CAN communication line. The TCM shifts shift pattern control to the manual mode based on these signals, and then shifts the A/T by operating each solenoid valve according to the shift operation of the driver.
*: With paddle shifter

NOTE:
When paddle shifter is pulled and held for approximately 60 seconds, gear shift using paddle shifter becomes inoperative. "P1815" is displayed in "Self Diagnostic Results" of CONSULT-III. In this case, paddle shifter returns to normal status when ignition switch is turned OFF once and then ON again. Gear shift using paddle shifter becomes operative.
- The TCM prohibits the manual mode while being in fail-safe mode due to an A/T malfunction, etc. Fail Safe.

Manual Mode Information
The TCM transmits the manual mode shift refusal signal to the combination meter if the TCM refuses the transmission from the driving status of vehicle when the selector lever or paddle shifter shifts to "UP (+ side)" or "DOWN (- side)" side. The combination meter blinks shift indicator on the combination meter and sounds the buzzer to indicate the driver that the shifting is not performed when receiving this signal. However, the
TCM does not transmit the manual mode shift refusal signal in the conditions as per the following.
- When the selector lever or the paddle shifter shifts to "DOWN (- side)" side while driving in 1GR.
- When the selector lever or the paddle shifter shifts to "UP (+ side)" side while driving in 7GR.