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Home >> Subaru >> 2014 >> Tribeca >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle - Diagnostics >> Transmission Control Module (TCM) I/O Signal >> Electrical Specification
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Electrical Specification

Fig 1: Identifying Transmission Control Module (TCM) I/O Signal Connector Terminals
G05341957Courtesy of SUBARU OF AMERICA, INC.
NOTE: The measurement should be performed after warming up.
Item Connector No. Terminal No. Measuring condition Measured value Resistance between terminal and chassis ground Remarks
P/L solenoid output B54 6 Engine ON, "P" range, accelerator OFF, brake ON 3.5 - 7.5 V 3 - 9 Ω (ATF temperature 20°C (68°F)) Drive frequency: 300 Hz
I/C oil pressure switch input B54 20 While driving at 1st-3rd of manual mode 6 V or more    
While driving at 4th or 5th of manual mode Less than 1.5 V  
Power GND B54 12 Always Approx. 0 V -  
CAN communication line (+) B55 21 - - -  
CAN communication line (-) B55 20 - - -  
ATF temperature sensor input B54 17 Ignition switch ON
ATF oil temperature 20°C (68°F)		 3.5 - 4.3 V 2.5 - 7.0 kΩ Measure the resistance with the connector disconnected.
Ignition switch ON
ATF oil temperature 80°C (176°F)		 1 - 2.2 V 0.3 - 0.8 kΩ
Backup power supply B55 24 Ignition switch ON 8 V or more -  
Ignition switch OFF
I/C solenoid output B54 3 While driving at 1st-3rd of manual mode 5 V or more 3 - 9 Ω (ATF temperature 20°C (68°F)) Drive frequency: 300 Hz
While driving at 4th or 5th of manual mode Less than 1.5 V
H & LR/C solenoid output B54 5 While driving at 2nd of manual mode 5 V or more 3 - 9 Ω (ATF temperature 20°C (68°F)) Drive frequency: 300 Hz
While driving at 1st, 3rd-5th of manual mode Less than 1.5 V
Power GND B54 13 Always Approx. 0 V -  
Analog GND B54 18 Always Approx. 0 V -  
Fr/B solenoid output B54 4 While driving at other than 4th of manual mode 5 V or more 3 - 9 Ω (ATF temperature 20°C (68°F)) Drive frequency: 300 Hz
While driving at 4th of manual mode Less than 1.5 V
L/U solenoid output B54 7 When lock-up 3 V or more 3 - 9 Ω (ATF temperature 20°C (68°F)) Drive frequency: 300 Hz
When not lock-up Less than 1 V
D/C solenoid output B54 1 While driving at 1st or 5th of manual mode 5 V or more 3 - 9 Ω (ATF temperature 20°C (68°F)) Drive frequency: 300 Hz
While driving at 2nd-4th of manual mode Less than 1.5 V
D/C oil pressure switch input B54 22 While driving at 1st or 5th of manual mode 6 V or more    
While driving at 2nd-4th of manual mode Less than 1.5 V  
Subaru Select Monitor communication line B55 8 Ignition switch ON 8 V or more -  
Ignition switch OFF Less than 1 V  
Sensor GND (analog) B54 16 Always Approx. 0 V -  
H&LR/C oil pressure switch input B54 14 While driving at 2nd of manual mode 6 V or more -  
While driving at 3rd-5th of manual mode Less than 1.5 V
Fwd/B solenoid output B54 19 While driving at 1st or 2nd of manual mode 5 V or more   Drive frequency: 300 Hz
While driving at 3rd-5th of manual mode Less than 1.5 V  
Fwd/B oil pressure switch input B54 21 While driving at 1st or 2nd of manual mode Less than 1.5 V    
While driving at 3rd-5th of manual mode 6 V or more    
Front vehicle speed sensor input B54 24 While driving at 2nd and 20 km/h (12 MPH) of manual mode Approx. 500 - 700 RPM - Use the Subaru Select Monitor.
While driving at 4th and 80 km/h (50 MPH) of manual mode Approx. 2, 000 - 2, 500 RPM Use the Subaru Select Monitor.
Inhibitor switch 1 input B54 8 Ignition switch ON, "P" range Less than 0.5 V -  
Ignition switch ON, "N" range 5 V or more
Inhibitor switch 2 input B54 9 Ignition switch ON, "P" range 5 V or more -  
Ignition switch ON, "D" range Less than 0.5 V
Ignition power supply B54 27 Ignition switch ON 8 V or more -  
Ignition switch OFF Less than 1 V
Rear vehicle speed sensor input B54 23 While driving at 2nd and 20 km/h (12 MPH) of manual mode Approx. 500 - 700 RPM - Use the Subaru Select Monitor.
While driving at 4th and 80 km/h (50 MPH) of manual mode Approx. 2, 000 - 2, 500 RPM Use the Subaru Select Monitor.
Fr/B oil pressure switch input B54 15 While driving at other than 4th of manual mode Less than 1.5 V -  
While driving at 4th of manual mode 6 V or more
Turbine speed sensor 1 input B54 26 2nd of manual mode, turbine speed sensor is 2, 000 RPM (Read from Subaru Select Monitor) Approx. 0 RPM - Use the Subaru Select Monitor.
4th of manual mode, turbine speed sensor is 2, 000 RPM (Read from Subaru Select Monitor) Approx. 1, 900 - 2, 100 RPM Use the Subaru Select Monitor.
Inhibitor switch 3 input B54 10 Ignition switch ON, "R" range 5 V or more -  
Ignition switch ON, "D" range Less than 0.5 V
Control GND1 B55 23 Ignition switch ON Approx. 0 V    
Ignition switch OFF    
Control GND2 B55 22 Ignition switch ON Approx. 0 V    
Ignition switch OFF    
Inhibitor switch 4 input B54 11 Ignition switch ON, "P" range Less than 0.5 V -  
Ignition switch ON, "D" range 5 V or more
Back-up light relay output B55 13 Ignition switch ON, "R" range Less than 1 V 90 - 110 Ω (ATF temperature 25°C (77°F))  
Ignition switch ON, other than "R" range 8 V or more
AWD solenoid output B54 2 Engine ON, "P" range or "N" range, accelerator OFF Less than 1 V 3 - 9 Ω (ATF temperature 20°C (68°F)) Drive frequency: 300 Hz
Engine ON, "D" range, accelerator OFF, brake ON 2 V or more
Turbine speed sensor 2 input B54 25 2nd gear of manual mode, turbine speed sensor is 2, 000 RPM (Read from Subaru Select Monitor) Approx. 1, 200 - 1, 500 RPM - Use the Subaru Select Monitor.
4th of manual mode, turbine speed sensor is 2, 000 RPM (Read from Subaru Select Monitor) Approx. 1, 900 - 2, 100 RPM - Use the Subaru Select Monitor.
PN signal output B55 11 Ignition switch ON, Other than "P" range or "N" range 8 V or more -  
Ignition switch ON, "P" range or "N" range Less than 1 V -  
Ignition power supply 1 B55 26 Ignition switch ON 8 V or more    
Ignition switch OFF Less than 1 V    
Ignition power supply 2 B55 19 Ignition switch ON 8 V or more    
Ignition switch OFF Less than 1 V    
Ignition power supply 3 B55 18 Ignition switch ON 8 V or more    
Ignition switch OFF Less than 1 V    
Ignition power supply 4 B55 25 Ignition switch ON 8 V or more    
Ignition switch OFF Less than 1 V    
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