Hyundai Santa Fe (2006 year). Manual — part 18

AT -24

AUTOMATIC TRANSAXLE (F4A51)

REVERSE

Pressure release

Main pressure

Pump intak

e pressure

Damper clutch apply pressure

T

orque con

v

e

rter and Lubr

ication

Depressed pressure

EKRF017M

AUTOMATIC TRANSAXLE SYSTEM

AT -25

ELECTRONIC CONTROL SYSTEM

E1D6CFCD

DESCRIPTION

The electronic control system used in the new generation
auto transaxle is far superior to the previous systems. This
system is able to adopt a variable shift pattern for smooth
and problem free shifting.

A solenoid valve is applied to each of the clutches and
brakes and is independently controlled. Feedback control
and correction control is performed in all gears as well as
utilization of mutual control system to increase shift feeling.
The torque converter damper clutch uses a partial lock
up and full lock-up system. An additional control method
called the HIVEC system (neural network) is adopted to
increase shift feeling.

BLOCK DIAGRAM (CAN)

Sports mode S/W

-Selection

-Up shift

-Down shift

Input shaft speed

DIAGNOSIS

TCC(DCC) SOLENOID VALVE

OD SOLENOID VALVE

UD SOLENOID VALVE

A/T CONTROL RELAY

L&R SOLENOID VALVE

2ND SOLENOID VALVE

Brake s/w

Inhibitor s/w

Oil temperature

Output shaft speed

TCM(PCM)

Shift pattern control

Hydraulic pressure control

during shift

HIVEC control

Mutual control

Diagnosis control

ENG ECM

(CAN Method)

ABS ECM

(CAN Method)

VFS SOLENOID VALVE

EKRF004G

AT -26

AUTOMATIC TRANSAXLE (F4A51)

ELECTRIC CONTROL LOCATION

The TCM(PCM) is located on the intake manifold in the
engine room.

TCM

EKRF087A

AUTOMATIC TRANSAXLE SYSTEM

AT -27

OPERATING COMPONENTS AND FUNCTIONS

Sensor

Function

Input shaft speed sensor

Detect turbine speed at UD retainer

Output shaft speed sensor

Detect T/F drive gear speed at T/F driven gear (4A/T)

Crank angle sensor

Detect engine speed

TPS(Gasoline)

Throttle opening ratio by potentiometer

Air conditioner switch

A/C load by thermister

Inhibitor switch

Select lever position by contact switch

Brake switch

Brake pedal position

Vehicle speed sensor

Detect vehicle speed by speedometer driven gear

Sport mode switch

Sport mode On/Off signal

Sport mode up-shift switch

Sport mode up-shift signal

Sport mode downshift switch

Sport mode downshift signal

Request of torque reduction

Send the request of torque reduction to ECM

ABS-ECM, Engine ECM

In case of CAN communication

SPORTS MODE

SPORTS MODE SWITCH

SCMAT6509L

Sport mode A/T

Dr

iving po

w

e

r

Manual T/M

Time

EKRF005C

Sports mode allows the manual up-shift and downshift with
the accelerator pedal is depressed. The prompt response
and shift would be obtained due to the continuous shift-
ing without cutting of driving power. The shifting time is
also decreased about 0.1sec during up-shift, 0.2sec dur-
ing downshift. As the selector lever is pushed upward or
downward one time, the gear is up shifted or downshifted
by one gear.