System Description
SYSTEM
SHIFT PATTERN CONTROL : System Description
DRIVE MODE SELECTOR
Input/Output Signal Chart
- 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 HPCM 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 while driving in any other drive mode status.
- Driving characteristic is controlled (for decreasing needless acceleration and deceleration and reducing energy consumption), so that driving that improves operational fuel efficiency is assisted.
- For gear shift vehicle speed, Specifications.
- 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 HPCM 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.
- 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
Input/Output Signal Chart
- The TCM receives the manual mode signal, non-manual mode signal, manual mode shift up signal, and manual mode 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.
- The TCM prohibits the manual mode while being in fail-safe mode due to an A/T malfunction, etc. Refer to
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 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 shifts to "DOWN (- side)" side while driving in 1GR.
- When the selector lever shifts to "UP (+ side)" side while driving in 7GR.