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Home >> Subaru >> 2012 >> Outback Limited >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Continuously Variable Transmission Diagnostics >> Transmission Control Module (TCM) I/O Signal >> Electrical Specification
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Electrical Specification

Fig 1: Transmission Control Module Connector Terminal Identification
G07913750Courtesy of SUBARU OF AMERICA, INC.
NOTE: Measure after warming up.
Item Connector No. Terminal No. Measuring conditions Measured value Resistance between terminal and chassis ground Remarks
Backup power supply B55 1 - 10 - 13 V -  
Ignition power supply B55 21 - 10 - 13 V -  
Main power supply B55 11 - 10 - 13 V -  
Main power supply B55 2 - 10 - 13 V -  
Main power supply B55 22 - 10 - 13 V -  
Manual mode switch B55 4 Manual mode switch ON Less than 1 V -  
Manual mode switch OFF 8 V or more -
Manual mode UP switch B55 5 Paddle shift UP switch ON Less than 1 V -  
Paddle shift UP switch OFF 8 V or more -
Manual mode DOWN switch B55 16 Paddle shift DOWN switch ON Less than 1 V -  
Paddle shift DOWN switch OFF 8 V or more -
Stop light switch B55 13 Stop light switch ON 8 V or more -  
Stop light switch OFF Less than 1 V -
P range switch B54 5 P range Less than 1 V -  
Except for P range 8 V or more -
R range switch B54 18 R range Less than 1 V -  
Except for R range 8 V or more -
N range switch B54 9 N range Less than 1 V -  
Except for N range 8 V or more -
D range switch B54 22 D range Less than 1 V -  
Except for D range 8 V or more -
ATF temperature sensor B54 3 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 B54 16 Always Approx. 0 V -  
Secondary pressure sensor power supply output B54 2 Ignition switch ON 5 V -  
Secondary pressure sensor B54 17 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 B54 15 Always Approx. 0 V -  
Primary speed sensor B54 6 While driving 0 or 5 V - Refer to Figurethe waveform (sensor)
Secondary speed sensor B54 7 While driving 0 or 5 V - Refer to Figurethe waveform (sensor)
Front wheel speed sensor B54 20 While driving 0 or 5 V - Refer to Figurethe waveform (sensor)
Self shut output B55 20 For three seconds after ignition ON and OFF Less than 1 V -  
Ignition switch OFF 8 V or more
F & R solenoid B54 11 Engine ON Refer to Figurethe waveform (solenoid (1)) Approx. 4 - 6 Ω Resistance value at 20°C (68°F) Value is higher as the temperature increase.
Secondary solenoid B54 12 Engine ON Refer to Figurethe waveform (solenoid (2)) Approx. 5 - 7 Ω Resistance value at 20°C (68°F) Value is higher as the temperature increase.
Primary UP solenoid B54 24 Engine ON, while UP shifting Refer to Figurethe waveform (solenoid (3)) Approx. 10 - 13.5 Ω Resistance value at 20°C (68°F) Value is higher as the temperature increase.
Primary DOWN solenoid B54 25 Engine ON, while DOWN shifting Refer to Figurethe waveform (solenoid (4)) Approx. 10 - 13.5 Ω Resistance value at 20°C (68°F) Value is higher as the temperature increase.
Lock-up duty solenoid B54 26 Lock-up ON Refer to Figurethe waveform (solenoid (5)) Approx. 10 - 13.5 Ω Resistance value at 20°C (68°F) Value is higher as the temperature increase.
AWD solenoid B54 13 Engine ON, "P" or "N" range Refer to Figurethe waveform (solenoid (6)) Approx. 2 - 4.5 Ω Resistance value at 20°C (68°F) Value is higher as the temperature increase.
Engine ON, "D" range, brake ON Refer to Figurethe waveform (solenoid (7))
Lock-up ON/OFF solenoid B54 23 Lock-up OFF Less than 1 V Approx. 13 - 18.5 Ω Resistance value at 20°C (68°F) Value is higher as the temperature increase.
Lock-up ON Battery voltage or higher
CAN communication line (+) B55 18 - - -  
CAN communication line (-) B55 17 - - -  
Ground B54 1 Always Approx. 0 V -  
Ground B54 14 Always Approx. 0 V -  
Data link signal (Subaru Select Monitor) B55 19 Ignition switch ON 8 V or more -  
Ignition switch OFF Less than 1 V
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