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Home >> Subaru >> 2017 >> Forester 2.0XT Premium >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Transaxle (Diagnostics) >> Transmission Control Module (TCM) I/O Signal >> Electrical Specification
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Electrical Specification

Fig 1: Identifying TCM Connector Terminals
G10219000Courtesy of SUBARU OF AMERICA, INC.
NOTE: Measure after warming up.
Item Terminal No. Measuring condition Measurement value Resistance between terminal and chassis ground Remarks
Backup power supply 34 - 10 - 13 V -  
Ignition power supply 41 - 10 - 13 V -  
Main power supply 8 - 10 - 13 V -  
Main power supply 24 - 10 - 13 V -  
Main power supply 40 - 10 - 13 V -  
Manual mode switch/Lo mode switch 20 Manual mode switch/Lo mode switch ON Less than 1 V -  
Manual mode switch/Lo mode switch OFF 8 V or more -
Manual mode UP switch 19 Manual mode UP switch ON Less than 1 V -  
Manual mode UP switch OFF 8 V or more -
Manual mode DOWN switch 18 Manual mode DOWN switch ON Less than 1 V -  
Manual mode DOWN switch OFF 8 V or more -
Stop light switch 29 Stop light switch ON 8 V or more -  
Stop light switch OFF Less than 1 V -
P range switch 38 P range Less than 1 V -  
Except for P range 8 V or more -
R range switch 37 R range Less than 1 V -  
Except for R range 8 V or more -
N range switch 36 N range Less than 1 V -  
Except for N range 8 V or more -
D range switch 35 D range Less than 1 V -  
Except for D range 8 V or more -
ATF temperature sensor 6 ATF temperature at 20° C (68°F) Approx. 2.6 V Approx. 2.6 kΩ  
ATF temperature at 80° C (176°F) Approx. 0.7 V Approx. 370 Ω
ATF temperature sensor GND 1 Always Approx. 0 V -  
Secondary pressure sensor power supply output 33 Ignition switch ON 5 V -  
Secondary pressure sensor 5 Ignition switch ON, engine OFF Approx. 0.5 V (0 MPa) - Value increases with increase of engine load. (0.5 - 4.5 V)
Ignition switch ON, engine ON Approx. 1.0 V (1.0 MPa) -
Secondary pressure sensor GND 2 Always Approx. 0 V -  
Primary speed sensor 14 While driving 0 or 5 V - Refer to the waveform (sensor)Figure
Secondary speed sensor 13 While driving 0 or 5 V - Refer to the waveform (sensor)Figure
Front wheel speed sensor 12 While driving 0 or 5 V - Refer to the waveform (sensor)Figure
Self shut output 25 For three seconds after ignition switch ON and OFF Less than 1 V -  
Ignition switch OFF 8 V or more
F&R solenoid 16 Engine ON Refer to the waveform (solenoid (1)) SOLENOID  Approx. 4 - 6 Ω Resistance value at 20°C (68°F). Value is higher as the temperature increase.
Secondary solenoid 32 Engine ON Refer to the waveform (solenoid (2))SOLENOID  Approx. 5 - 7 Ω Resistance value at 20°C (68°F). Value is higher as the temperature increase.
Primary UP solenoid 47 Engine ON, while UP shifting Refer to the waveform (solenoid (3)) SOLENOID  Approx. 10 - 13.5 Ω Resistance value at 20°C (68°F). Value is higher as the temperature increase.
Primary DOWN solenoid 30 Engine ON, while DOWN shifting Refer to the waveform (solenoid (4))SOLENOID  Approx. 10 - 13.5Ω Resistance value at 20°C (68°F). Value is higher as the temperature increase.
Lock-up duty solenoid 15 Lock-up ON Refer to the waveform (solenoid (5)) SOLENOID  Approx. 10 - 13.5 Ω Resistance value at 20°C (68°F). Value is higher as the temperature increase.
AWD solenoid 48 Engine ON, P or N range Refer to the waveform (solenoid (6)) SOLENOID  Approx. 2 - 4.5 Ω Resistance value at 20°C (68°F). Value is higher as the temperature increase.
Engine ON, D range, and brake ON Refer to the waveform (solenoid (7)) SOLENOID 
Lock-up ON/OFF solenoid 31 Lock-up OFF Less than 1 V Approx. 13 - 18.5Ω Resistance value at 20°C (68°F). Value is higher as the temperature increase.
With lock-up ON and R range Battery voltage or higher
CAN communication line (+) 43 - - -  
CAN communication line (-) 44 - - -  
GND 26 Always Approx. 0 V -  
GND 42 Always Approx. 0 V -  
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