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Home >> Subaru >> 2012 >> Forester X, Automatic Trans >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - Diagnostics >> Transmission Control Module (TCM) I/O Signal >> Electrical Specification
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Electrical Specification

Fig 1: Transmission Control Module Connector Terminals
G07665834Courtesy of SUBARU OF AMERICA, INC.
TRANSMISSION CONTROL MODULE CONNECTOR TERMINALS REFERENCE CHART

Check with ignition switch ON.
Item 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
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 (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 2nd or 4th gear Less than 1 2.0 - 4.5
"P" or "N" range 5.0 or more
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 Except "1" range 5.0 or more 2.0 - 4.5
"1" range signal 2.5 - 5.0
FWD switch (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
System ground (B54) No. 20 Chassis ground - 0 Less than 1
(B54) No. 21 Chassis ground
(B54) No. 22 Chassis ground
(B54) No. 23 Chassis ground
Data link signal (Subaru Select Monitor) (B54) No. 8 Chassis ground - - -
Manual 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 -
Manual shift DOWN switch (B54)No. 18 Chassis ground Ignition switch ON SPORT shift down switch is ON Less than 1 -
Ignition switch ON When SPORT shift DOWN switch is OFF 8 or more -
Manual shift UP switch (B54) No. 19 Chassis ground Ignition switch ON When SPORT shift UP switch is ON Less than 1 -
Ignition switch ON When SPORT shift UP switch is OFF 8 or more -