Drive Mode Selector

INPUT/OUTPUT SIGNAL CHART

Item

Signal

TCM function

Actuator

Input speed sensor 1, 2

Input speed

Drive mode selector

High and low reverse clutch solenoid valve
Direct clutch solenoid Value
Input clutch solenoid valve
Low brake solenoid valve
2346 brake solenoid valve
Front brake solenoid valve
Clutch 1 solenoid valve
Line pressure solenoid valve
Anti-interlock solenoid valve

Output speed sensor

Vehicle speed

A/T fluid temperature sensor

ATF temperature

Traction motor inverter

Motor speed signal⁽¹⁾

HPCM

Engine start request signal⁽¹⁾

Accelerator pedal position signal⁽¹⁾

Closed throttle position signal⁽¹⁾

Input torque signal⁽¹⁾

Drive mode select signal⁽¹⁾

Shift schedule signal⁽¹⁾

ABS actuator and electric unit (control unit)

Side G sensor signal⁽¹⁾

BCM

Stop lamp switch signal⁽¹⁾

A/C auto amp.

STANDARD mode signal⁽¹⁾

ECO mode signal⁽¹⁾

SPORT mode signal⁽¹⁾

SNOW mode signal⁽¹⁾

⁽¹⁾	This signal is transmitted via CAN communication line.

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.

ECO mode

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, refer to "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 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.

Fig 1: Adaptive Shift Control - System Diagram (Driving On Up/Down Slope And Curve)

Courtesy of NISSAN NORTH AMERICA, INC.

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.