Location of connectors automatic transmission AISIN

X-1	TCM connector on vehicle side
A1	«Weight»
A2	«Weight» pressure control solenoid valve
A4	Pressure control solenoid valve
A5	Lockout solenoid valve
A6	«+» Ignition
A7	Data bus (isolated «-»)
A11	Fluid temperature sensor
A12	«Weight» working fluid temperature sensor
A14	Timing solenoid valve
A15	2nd gear solenoid valve
A16	1st gear solenoid valve
A17	«+» Data bus
A23	«Weight»
A24	B+
IN 1	Position signal R
VZ	Watch
AT 4	Retention
AT 6	Yes
AT 7	Position signal D
AT 8	Position signal N
B16	«Weight» input shaft speed sensor
B18	Position signal L
B19	Position signal 2
IN 20	Position signal P
B22	Stoplight switch
B23	DLC
B25	Output shaft speed sensor

X-2	switch connector «parking-neutral»
1	Position signal P
2	Position signal R
3	«Weight»
4	Position signal 2
5	Position signal N
6	ST (-)
7	Position signal D
8	Position signal 1
9	ST (+)

X-3	Automatic transmission control connector
1	Fluid temperature sensor
2	Timing solenoid valve
3	Pressure control solenoid valve
4	Lockout solenoid valve
5	1st gear solenoid valve
6	«Weight» working fluid temperature sensor
SO	«Weight» pressure control solenoid valve
10	2nd gear solenoid valve

X-4	Output Shaft Speed Sensor Connector
1	Ignition
2	«Weight»
3	Output shaft speed sensor

X-5	Input Shaft Speed Sensor Connector
1	«Weight» input shaft speed sensor
2	Input Shaft Speed Sensor

Transmission control unit (BUT)

Park/Neutral Position Switch (PPN)

Park/Neutral Position Switch (PPN) transmits information ranging from the gear lever to the starter and BUT.

The PPN switch can only start the engine in the position «R» And «N». (Prevention of reckless driving).

The PPN switch causes the reversing lamp to light up when reversing.

It is used for the PPN switch when switching the regulator. The PPN switch transmits information through a combination of a starter circuit and a reverse circuit to the vehicle directly without the BUT.

Synchronization solenoid

The synchronizing solenoid is mounted directly on the valve body. Solenoid turns on/off (ON/ OFF) by means of a control signal from the BUT. A timing change solenoid inside the valve body actuates hydraulic control by engaging and disengaging the forward clutch.

Pressure control solenoid (SKD)

Pressure control solenoid (SKD) located in the valve body and regulates the transmission fluid pressure system. It is internally grounded in the LUT and operates when battery voltage is applied from the LUT, through the ACS and back to the LUT.

The battery voltage is controlled by alternating current from the BUT.

The current strength indicates the position of the inductor.

Transmission fluid temperature sensor (TDK)

The TDK sensor provides the TCU with transmission fluid temperature information.

The TTF uses TTZ sensor information to calculate shift points and to activate the torque converter lock-up function.

Input Shaft Speed Sensor (SVV)

The UHV sensor is located in the upper part of the gearbox and records the speed of the input shaft of the automatic gearbox, based on the number of revolutions of the direct clutch drum.

They transmit the BUT signal.

Output Shaft Speed Sensor (OutV)

The SVV sensor is located at the top of the gearbox and records the vehicle speed based on the number of revolutions of the differential gear.

Component		Function
C1	Forward clutch	Connects input shaft and front sun gear
C2	Straight coupler	Connects input shaft and planet carrier
NW	Reverse clutch	Connects input shaft and rear sun gear
B1	Lead brake and 2nd brake	Prevents rotation of the rear planetary solar gear wheel clockwise or counterclockwise
B2	2nd brake	Prevents F1 outer race from rotating clockwise or counterclockwise, thus preventing rotation rear sun gear counterclockwise
VZ	1st and reverse brake	Prevents planetary carrier from rotating clockwise or counterclockwise
F1	One way clutch #1	During B2 operation, this clutch prevents rotation of the rear sun gear counterclockwise
F2	One way clutch #2	Prevents planet carrier from rotating against clockwise
planetary gear		These gears change the route that is transmitted driving force according to the functioning of each clutches and brakes, in order to increase or decrease input and output shaft speed

Shift control

If ATF is lower than specified in the specification (15°С), shifting to 4th gear is prevented.

Hydraulic control system automatic transmission

Based on the hydraulic pressure generated by the oil pump, the ECU sends signals to the solenoid and the hydraulic control system adjusts the hydraulic pressure acting on the torque converter, planetary gear, clutches and brakes according to the operating conditions of the vehicle.