Automatic transmission-46
Pin
No.
Type 2WD Description
A24 CAN (-ve) I/O ○ CAN hidden communication end
A23 CAN (+ve) I/O ○ CAN exposed communication end
A22
K line communication
connection
I/O ●
Diagnosis information and car code
A21 Nonuse ―― ○ －－－－－
A20 Nonuse ―― ○ －－－－－
A19
Shaft speed sensor
signal
IP ○
The sensor sends the shaft speed signal to TCU
A18 Nonuse ―― ○ －－－－－
A17 Nonuse ―― ○ －－－－－
A16 Nonuse ―― ○ －－－－－
A15 Nonuse ―― ○ －－－－－
B6 Gear-position IP ●
The switch has the variable-voltage; indicate the
gear-position steering column selected (PRND321). The
voltage is variable in the range of 0V--5V.
B5
transmission fluid
temperature
IP ●
The sensor indicates the transmission fluid temperature.
High R=Low temperature
Low R= High temperature
The voltage is variable in the range of 0V to 5V
B4 solenoid valve 4 OP ●
N/OFF normal-opened solenoid valve, combined with the
ON/OFF witch of solenoid valve 3; ensure the shifting
quality and sequence
B3 solenoid valve 1 OP ●
ON/OFF normal-opened solenoid valve; combined with
other solenoid valve; used to determine the selected
gear-position.
B2 Nonuse ―― ○ －－－－－
B1
Return solenoid valve
5
IP ●
Using for grounding of VPS and current of circuit can be
detected, then process the feedback control for the VPS.
B14
Gear-position －
grounding
GND ●
PRND321 Gear-position switch grounding
B13
transmission fluid
temperature －
grounding
GND ●
Connected to grounding pin of temperature sensor.
B12 solenoid valve 6 OP ●
ON/OFF normal-opened solenoid valve, determine the
high or low of line pressure
B11 solenoid valve 2 OP ●
ON/OFF normal-opened solenoid valve, combined with
other solenoid valves; used to determine the selected
gear-position.
B10 solenoid valve 3 OP ●
ON/OFF normal-opened solenoid valve, combined with
the ON/OFF switch of solenoid valve 4; ensure the
shifting quality and sequence
B9 solenoid valve 7 OP ●
ON/OFF normal-opened solenoid valve, hydraulic torque
converter locking; increase the efficiency of medium
speed run.
B8 Nonuse ―― ○ －－－－－
B7 solenoid valve 5(+ve) OP ●
It is the solenoid valve which can change the pressure
during the shifting and on/off of solenoid valve.
● = connected line ○ = unconnected line ＊ =only
OP= output IP=input I/O=input/output
GND=grounding REF=reference PWR=power
Table 6.1.1 Description of TCU pin
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