A/T CONTROL SYSTEM
AT-421
[RE5F22A]
D
E
F
G
H
I
J
K
L
M
A
B
AT
Revision: November 2006
2006 Altima
TCM Function
ECS009CK
The function of the TCM is to:
●
Receive input signals sent from various switches and sensors.
●
Determine required line pressure, shifting point, lock-up operation, and engine brake operation.
●
Send required output signals to the respective solenoids.
CONTROL SYSTEM OUTLINE
The automatic transaxle senses vehicle operating conditions through various sensors or signals. It always
controls the optimum shift position and reduces shifting and lock-up shocks.
CONTROL SYSTEM DIAGRAM
SENSORS (or SIGNAL)
Þ
TCM
Þ
ACTUATORS
PNP switch
Throttle angle signal
Throttle position signal
Engine speed signal
Engine torque signal
A/T fluid temperature sensor
Revolution sensor
Turbine revolution sensor
Vehicle speed signal
Manual mode switch signal
Stop lamp switch signal
Shift control
Line pressure control
Lock-up control
Engine brake control
Timing control
Fail-safe control
Self-diagnosis
CONSULT-II communication line
CAN communication line
On board diagnosis
Shift solenoid valve A
Shift solenoid valve B
Shift solenoid valve C
Shift solenoid valve D
Shift solenoid valve E
Pressure control solenoid valve A
Pressure control solenoid valve B
Pressure control solenoid valve C
A/T CHECK indicator lamp
WCIA0445E