AUTOMATIC TRANSMISSION (DIAGNOSTICS)(4AT) > Transmission Control Module (TCM) I/O Signal

ELECTRICAL SPECIFICATION

Check with ignition switch ON.

Contents

Measured terminal (Connector & Terminal No.)

Measuring condition

Voltage (V)

Resistance (Ω)

Positive terminal

Ground terminal

Backup power supply

(B54) No. 25

Chassis ground

Ignition switch OFF

10 — 13

—

(B54) No. 26

(B54) No. 27

Ignition power supply

(B54) No. 1

Chassis ground

Ignition switch ON

10 — 13

—

(B54) No. 2

Inhibitor switch

“P” range

Switch

(B55) No. 14

Chassis ground

Select lever in “P” range

Less than 1

—

Select lever in any other than “P” range

8 or more

“R” range switch

(B55) No. 13

Chassis ground

Select lever in “R” range

Less than 1

—

Select lever in any other than “R” range

8 or more

“N” range switch

(B55) No. 11

Chassis ground

Select lever in “N” range

Less than 1

—

Select lever in any other than “N” range

8 or more

“D” range switch

(B55) No. 10

Chassis ground

Select lever in “D” range

Less than 1

—

Select lever in any other than “D” range

8 or more

ATF temperature sensor

(B55) No. 23

(B55) No. 12

ATF temperature 20°C (68°F)

3.5 — 4.3

2.5 k — 7 k

ATF temperature 80°C (176°F)

1.0 — 2.2

300 — 800

ATF temperature sensor ground

(B55) No. 12

Chassis ground

—

0

Less than 1

Rear vehicle speed sensor

(B55) No. 26

(B55) No. 15

Vehicle stopped

0

—

Vehicle speed 20 km/h (12 MPH) or more

2 or more (AC range)

Rear vehicle speed sensor ground

(B55) No. 15

Chassis ground

—

0

Less than 1

Front vehicle speed sensor

(B55) No. 27

(B55) No. 16

Vehicle stopped

0

450 — 650

Vehicle speed 20 km/h (12 MPH) or more

1 or more (AC range)

Front vehicle speed sensor ground

(B55) No. 16

Chassis ground

—

—

—

Torque converter turbine speed sensor

(B55) No. 1

(B55) No. 2

Engine idling after warm up (“D” range)

0

450 — 650

Engine idling after warm up (“N” range)

1 or more (AC range)

Torque converter turbine speed sensor ground

(B55) No. 2

Chassis ground

—

—

—

Line pressure linear solenoid

(B55) No. 4

(B55) No. 3

Ignition switch ON

R range throttle fully closed after engine warm up.

3.7 — 7.7

4.0 — 6.0

Ignition switch ON

R range throttle fully open after engine warm up.

1.1 — 5.1

Line pressure linear solenoid ground

(B55) No. 3

Chassis ground

—

Less than 1

Less than 1

Lock-up duty solenoid

(B55) No. 6

Chassis ground

When lock up occurs.

10.5 or more

2.0 — 4.5

When lock up is released.

Less than 1

Transfer duty solenoid (models with MPT)

(B55) No. 5

Chassis ground

With fuse installed to FWD switch

Less than 1

2.0 — 4.5

With fuse removed from FWD switch (1st gear)

2.0 — 3.0

2-4 brake duty solenoid

(B54) No. 4

Chassis ground

“P” or “N” range

5.0 or more

2.0 — 4.5

2nd or 4th gear

Less than 1

High clutch duty solenoid

(B54) No. 6

Chassis ground

3rd or 4th gear

Less than 1

2.0 — 4.5

“P” or “N” range

5.0 or more

Low clutch duty solenoid

(B54) No. 7

Chassis ground

1st or 2nd gear

Less than 1

2.0 — 4.5

“P” or “N” range

5.0 or more

Low & reverse duty solenoid

(B54) No. 5

Chassis ground

Driving in manual mode in any gear except 1st gear (15 km/h (9.3 MPH) or more)

5.0 or more

2.0 — 4.5

Driving in 1st gear of manual mode (15 km/h (9.3 MPH) or more)

2.5 — 5.0

FWD switch (except for FF model)

(B54) No. 10

Chassis ground

Fuse removed

10.5 or more

—

Fuse installed

Less than 1

CAN communication signal (+)

(B55) No. 18

Chassis ground

Ignition switch ON

Pulse signal

—

CAN communication signal (−)

(B55) No. 17

Chassis ground

Pulse signal

Power GND2

(B54) No. 20

Chassis ground

—

0

Less than 1

Power GND1

(B54) No. 21

Chassis ground

Control GND2

(B54) No. 22

Chassis ground

Control GND1

(B54) No. 23

Chassis ground

Data link signal (Subaru Select Monitor)

(B54) No. 8

Chassis ground

—

—

—

SPORT shift switch

(B54) No. 17

Chassis ground

Ignition switch ON

SPORT shift mode switch is ON

Less than 1

—

Ignition switch ON

SPORT switch shift mode switch is OFF

8 or more

—

SPORT shift UP switch

(B54) No. 18

Chassis ground

Ignition switch ON

SPORT shift up switch is ON

Less than 1

—

Ignition switch ON

SPORT switch shift mode switch is OFF

8 or more

—

SPORT shift DOWN switch

(B54) No. 19

Chassis ground

Ignition switch ON

SPORT shift down switch is ON

Less than 1

—

Ignition switch ON

SPORT switch shift mode switch is OFF

8 or more

—