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Home >> Subaru >> 2018 >> Outback 3.6R Limited >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics - Introduction) (H6DO) >> Engine Control Module (ECM) I/O Signal >> Electrical Specification
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Electrical Specification

G12410036Courtesy of SUBARU OF AMERICA, INC.
Description Connector No. Terminal No. Signal (V) Note
Ignition SW ON
After warm-up (at engine OFF)		 Engine ON
After warm-up (at idle)
Crankshaft position sensor (+) signal E158 40 0 -7 -+7 Waveforms 1, 8, 9, 10 and 11
(-) signal E158 27 0 0 -
Shield E158 53 0 0 -
Intake camshaft position sensor RH E158 54 0 or 5 0 or 5 Waveform 1
LH E158 41 0 or 5 0 or 5 Waveform 1
Exhaust camshaft position sensor RH E158 2 0 or 5 0 or 5 Waveform 1
LH E158 55 0 or 5 0 or 5 Waveform 1
Camshaft position sensor ground E158 42 0 0 -
Front oxygen (A/F) sensor RH (+) signal E158 46 2.6 - 3.2 0.9 - 2.9 Waveform 2
(-) signal E158 33 1.3 - 3.1 1.4 - 3.1 -
Heater signal E158 5 Battery voltage 0 or battery voltage Waveform 4
Front oxygen (A/F) sensor LH (+) signal E158 45 2.6 - 3.2 0.9 - 2.9 Waveform 2
(-) signal E158 44 1.3 - 3.1 1.4 - 3.1 -
Heater signal E158 4 Battery voltage 0 or battery voltage Waveform 4
Rear oxygen sensor RH (+) signal E158 57 0 0 - 0.9 -
(-) signal E158 56 1.5 1.0 - 1.7 Waveform 3
Heater signal E158 10 Battery voltage 0 or battery voltage Waveform 4
Rear oxygen sensor LH (+) signal E158 59 0 0 - 0.9 Waveform 3
(-) signal E158 47 1.5 1 - 1.7 -
Heater signal E158 11 Battery voltage 0 or battery voltage Waveform 4
Oxygen sensor shield E158 58 0 0 -
Air flow sensor Signal B134 16 0.5 - 1 0.6 - 2.3 -
Ground B134 17 0 0 -
Shield B134 3 0 0 -
Intake air temperature sensor signal B134 15 2.4 - 3.2 2.4 - 3.2 Ambient air temperature
Engine coolant temperature sensor signal E158 43 0.8 - 1.4 0.5 - 1.4 -
Engine oil temperature sensor signal E158 18 1 - 1.4 1 - 1.4 -
Manifold absolute pressure sensor signal E158 15 3.5 - 4.8 1 - 1.9 -
Knock sensor 1 signal E158 30 2.4 - 2.5 2.2 - 2.7 -
Knock sensor 2 signal E158 16 2.2 - 2.8 2.1 - 3 -
Knock sensor shield E158 17 0 0 -
Accelerator pedal position sensor Main signal B134 29 Fully closed: 0.3 - 1.1
Fully opened: 2.3 - 3.8		 Fully closed: 0.3 - 1.4
Fully opened: 2.3 - 3.8		 -
Main power supply B134 30 5 5 -
Main ground B134 33 0 0 -
Sub signal B134 31 Fully closed: 0.3 - 1.1
Fully opened: 2.3 - 3.8		 Fully closed: 0.3 - 1.4
Fully opened: 2.3 - 3.8		 -
Sub power supply B134 28 5 5 -
Sub ground B134 34 0 0 -
Intake oil flow control solenoid valve RH E158 20 Battery voltage 0 or battery voltage Waveform 5
LH E158 6 Battery voltage 0 or battery voltage Waveform 5
Exhaust oil flow control solenoid valve RH E158 21 Battery voltage 0 or battery voltage Waveform 5
LH E158 7 Battery voltage 0 or battery voltage Waveform 5
Purge control solenoid valve E158 51 Battery voltage Battery voltage In operation: Waveform 7
Leak check valve ASSY Switching valve B134 61 Battery voltage Battery voltage Operating: 0
Pressure sensor B134 21 1 - 4 1 - 4 When ignition switch is turned to ON: atmospheric pressure
Vacuum pump B134 9 Battery voltage Battery voltage Operating: 0
Ignition coil #1 E158 37 0 0 or 5 Waveform 8
#2 E158 35 0 0 or 5 Waveform 8
#3 E158 38 0 0 or 5 Waveform 8
#4 E158 36 0 0 or 5 Waveform 9
#5 E158 26 0 0 or 5 Waveform 9
#6 E158 39 0 0 or 5 Waveform 9
Fuel injector #1 E158 23 Battery voltage 0 or battery voltage Waveform 10
#2 E158 8 Battery voltage 0 or battery voltage Waveform 10
#3 E158 9 Battery voltage 0 or battery voltage Waveform 10
#4 E158 22 Battery voltage 0 or battery voltage Waveform 11
#5 E158 52 Battery voltage 0 or battery voltage Waveform 11
#6 E158 13 Battery voltage 0 or battery voltage Waveform 11
EGR control valve Signal 1 E158 12 0 or battery voltage 0 or battery voltage -
Signal 2 E158 48 0 or battery voltage 0 or battery voltage -
Signal 3 E158 25 0 or battery voltage 0 or battery voltage -
Signal 4 E158 49 0 or battery voltage 0 or battery voltage -
Electronic throttle control Main sensor signal E158 29 Approx. 0.9 Approx. 0.6 - 0.8 Fully closed: Approx. 0.6 - 1.2
Fully opened: Approx. 3.8 - 4.4
Sub sensor signal E158 31 Approx. 1.7 Approx. 1.5 - 1.7 Fully closed: Approx. 1.4 - 2
Fully opened: Approx. 4.0 - 4.6
Shield E158 19 0 0 -
Motor (+) signal E158 14 Duty waveform Duty waveform Drive frequency: 500 Hz
Waveform 6
Motor (-) signal E158 1 Duty waveform Duty waveform Drive frequency: 500 Hz
Electronic throttle control motor power supply B134 13 Battery voltage Battery voltage -
Electronic throttle relay control B134 65 0 0 -
Self-shutoff relay control B134 60 0 0 -
Starter relay control B134 62 Waveform Waveform Model without push button start
Waveform 17
Model with push button start
Waveform 12
Starter cut relay control B134 49 Waveform Waveform Model without push button start
Waveform 17
Model with push button start
Waveforms 12 and 13
Fuel pump relay control B134 26 0 0 -
Radiator fan relay control B134 39 0 0 -
Ignition switch B134 2 Battery voltage Battery voltage -
Neutral position switch B134 5 ON: 0
OFF: Battery voltage		 ON: 0
OFF: Battery voltage		 -
Delivery mode switch B134 6 Battery voltage Battery voltage When fuse is installed: 0
Oil level switch E158 3 0 0 Oil level LOW: Battery voltage
Starter switch B134 46 Waveform Waveform Model without push button start
Waveform 17
Model with push button start
Waveform 12
Starter switch 2 B134 58 Waveform Waveform Model without push button start
Waveform 17
Model with push button start
Waveform 12
Accessory cut request B134 64 Waveform Waveform Model without push button start
Waveform 17
Model with push button start
Waveform 13
Engine speed output B134 10 0 0 or battery voltage Model without push button start
Waveform 17
Model with push button start
Waveform 13
Brake switch 1
(Brake switch)		 B134 59 When brake pedal is depressed: 0
When brake pedal is released: Battery voltage		 When brake pedal is depressed: 0
When brake pedal is released: Battery voltage		 -
Brake switch 2
(Stop light switch)		 B134 48 When brake pedal is depressed: Battery voltage
When brake pedal is released: 0		 When brake pedal is depressed: Battery voltage
When brake pedal is released: 0		 -
Cruise control main switch B134 44 ON: 0
OFF: 5		 ON: 0
OFF: 5		 Model without EyeSight
Cruise control command switch B134 22 When operating nothing: 3.5 - 4.5
When operating RES/ACC: 2.5 - 3.5
When operating SET/COAST: 0.5 - 1.5
When operating CANCEL: 0 - 0.5		 When operating nothing: 3.5 - 4.5
When operating RES/ACC: 2.5 - 3.5
When operating SET/COAST: 0.5 - 1.5
When operating CANCEL: 0 - 0.5		 Model without EyeSight
Fuel pump control unit Control signal B134 63 0 0 or 5 Waveform 14
Diagnostic signal B134 8 0 Battery voltage When malfunction occurs: 0
Radiator main fan control B134 41 0 0 ON: 5
Waveform 15
Radiator sub fan control B134 40 0 0 ON: 5
Waveform 15
Generator control B134 23 0 or 6.5 0 or 6.5 Waveform 16
LIN communication B134 55 - - -
Immobilizer communication B134 38 - - -
CAN communication HI B134 25 - - -
LO B134 24 - - -
Control module power supply B134 1 Battery voltage Battery voltage -
B134 14 Battery voltage Battery voltage -
Backup power supply B134 27 Battery voltage Battery voltage Ignition switch OFF: Battery voltage
Sensor power supply B134 35 5 5 -
E158 32 5 5 -
Ground Body B134 53 0 0 -
Sensor B134 32 0 0 -
E158 34 0 0 -
Engine 1 E158 65 0 0 -
Engine 2 E158 64 0 0 -
Engine 3 E158 63 0 0 -
Engine 4 E158 62 0 0 -
Engine 5 E158 61 0 0 -
Engine 6 E158 60 0 0 -
NOTE:
  • After engine is warmed up, attach the check board for measurement.
  • Place the select lever in "P" range or "N" range.
  • Turn the A/C to OFF.
  • Turn all the accessory switches to OFF.
  • Waveforms vary depending on a measurement environment and vehicle condition.
  1. Waveform 1
    G11586487Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Crankshaft position sensor (+) signal (E158) No. 40 - Engine ground 3 (E158) No. 63:
    Intake camshaft position sensor RH (E158) No. 54 - Engine ground 3 (E158) No. 63:
    Intake camshaft position sensor LH (E158) No. 41 - Engine ground 3 (E158) No. 63:
    Exhaust camshaft position sensor RH (E158) No. 2 - Engine ground 3 (E158) No. 63:
    Exhaust camshaft position sensor LH (E158) No. 55 - Engine ground 3 (E158) No. 63:
    Measuring condition While engine idling
  2. Waveform 2
    G11586488Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Front oxygen (A/F) sensor RH (+) signal (E158) No. 46 (+) - Engine ground 3 (E158) No. 63:
    Front oxygen (A/F) sensor LH (+) signal (E158) No. 45 (+) - Engine ground 3 (E158) No. 63:
    Engine speed (current data display of engine)
    Throttle opening angle (current data display of engine)
    Measuring condition (a) Accelerator pedal fully closed (b) Accelerator pedal half open (c) Accelerator pedal fully opened
  3. Waveform 3
    G11586489Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Rear oxygen sensor RH (+) signal (E158) No. 57 (+) - Engine ground 3 (E158) No. 63:
    Rear oxygen sensor LH (+) signal (E158) No. 59 (+) - Engine ground 3 (E158) No. 63:
    Engine speed (current data display of engine)
    Throttle opening angle (current data display of engine)
    Measuring condition (a) Accelerator pedal fully closed (b) Accelerator pedal fully opened
  4. Waveform 4
    G11586490Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Front oxygen (A/F) sensor RH heater signal (E158) No. 5 (+) - Engine ground 3 (E158) No. 63:
    Front oxygen (A/F) sensor LH heater signal (E158) No. 4 (+) - Engine ground 3 (E158) No. 63:
    Rear oxygen sensor RH heater signal (E158) No. 10 (+) - Engine ground 3 (E158) No. 63:
    Rear oxygen sensor LH heater signal (E158) No. 11 (+) - Engine ground 3 (E158) No. 63:
    Measuring condition While engine idling
  5. Waveform 5
    G11586491Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Intake oil flow control solenoid valve RH (E158) No. 20 (+) - Engine ground 3 (E158) No. 63:
    Intake oil flow control solenoid valve LH (E158) No. 6 (+) - Engine ground 3 (E158) No. 63:
    Exhaust oil flow control solenoid valve RH (E158) No. 21 (+) - Engine ground 3 (E158) No. 63:
    Exhaust oil flow control solenoid valve LH (E158) No. 7 (+) - Engine ground 3 (E158) No. 63:
    Measuring condition (a) Accelerator pedal fully closed (b) Accelerator pedal fully opened
  6. Waveform 6
    G11586492Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Electronic throttle control motor (+) signal (E158) No. 14 (+) - Engine ground 3 (E158) No. 63:
    Measuring condition While engine idling
  7. Waveform 7
    G11586493Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Purge control solenoid valve (E158) No. 51 (+) - Engine ground 3 (E158) No. 63:
    Measuring condition Purge control solenoid valve: At 2000 rpm (during evaporative purge control)
  8. Waveform 8
    G11586494Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Crankshaft position sensor (+) signal (E158) No. 40 (+) - Engine ground 3 (E158) No. 63:
    Ignition coil #1 (E158) No. 37 (+) - Engine ground 3 (E158) No. 63:
    Ignition coil #2 (E158) No. 35 (+) - Engine ground 3 (E158) No. 63:
    Ignition coil #3 (E158) No. 38 (+) - Engine ground 3 (E158) No. 63:
    Measuring condition While engine idling
  9. Waveform 9
    G11586495Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Crankshaft position sensor (+) signal (E158) No. 40 (+) - Engine ground 3 (E158) No. 63:
    Ignition coil #4 (E158) No. 36 (+) - Engine ground 3 (E158) No. 63:
    Ignition coil #5 (E158) No. 26 (+) - Engine ground 3 (E158) No. 63:
    Ignition coil #6 (E158) No. 39 (+) - Engine ground 3 (E158) No. 63:
    Measuring condition While engine idling
  10. Waveform 10
    G11586496Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Crankshaft position sensor (+) signal (E158) No. 40 (+) - Engine ground 3 (E158) No. 63:
    Fuel injector #1 (E158) No. 23 (+) - Engine ground 3 (E158) No. 63:
    Fuel injector #2 (E158) No. 8 (+) - Engine ground 3 (E158) No. 63:
    Fuel injector #3 (E158) No. 9 (+) - Engine ground 3 (E158) No. 63:
    Measuring condition While engine idling
  11. Waveform 11
    G11586497Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Crankshaft position sensor (+) signal (E158) No. 40 (+) - Engine ground 3 (E158) No. 63:
    Fuel injector #4 (E158) No. 22 (+) - Engine ground 3 (E158) No. 63:
    Fuel injector #5 (E158) No. 52 (+) - Engine ground 3 (E158) No. 63:
    Fuel injector #6 (E158) No. 13 (+) - Engine ground 3 (E158) No. 63:
    Measuring condition While engine idling
  12. Waveform 12
    G11586498Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Starter relay control (B134) No. 62 (+) - Engine ground 3 (E158) No. 63:
    Starter cut relay control (B134) No. 49 (+) - Engine ground 3 (E158) No. 63:
    Starter switch (B134) No. 46 (+) - Engine ground 3 (E158) No. 63:
    Starter switch 2 (B134) No. 58 (+) - Engine ground 3 (E158) No. 63:
    Measuring condition Engine starting status
  13. Waveform 13
    G11586499Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Starter cut relay control (B134) No. 49 (+) - Engine ground 3 (E158) No. 63:
    Engine speed output (B134) No. 10 (+) - Engine ground 3 (E158) No. 63:
    Accessory cut request (B134) No. 64 (+) - Engine ground 3 (E158) No. 63:
    Battery voltage (battery terminal) (+) - Engine ground 3 (E158) No. 63:
    Measuring condition Engine starting status
  14. Waveform 14
    G11586500Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Fuel pump control unit control signal (B134) No. 63 (+) - Engine ground 3 (E158) No. 63:
    Measuring condition Idling status
  15. Waveform 15
    G11586501Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Radiator main fan control (B134) No. 41 (+) - Engine ground 3 (E158) No. 63:
    Radiator sub fan control (B134) No. 40 (+) - Engine ground 3 (E158) No. 63:
    Measuring condition Idling status
    At radiator fan operation
  16. Waveform 16
    G11586502Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Generator control (B134) No. 23 (+) - Engine ground 3 (E158) No. 63:
    Measuring condition Idling status
  17. Waveform 17
    G11586503Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Starter relay control (B134) No. 62 (+) - Engine ground 3 (E158) No. 63:
    Starter cut relay control (B134) No. 49 (+) - Engine ground 3 (E158) No. 63:
    Starter switch (B134) No. 46 (+) - Engine ground 3 (E158) No. 63:
    Starter switch 2 (B134) No. 58 (+) - Engine ground 3 (E158) No. 63:
    Accessory cut request (B134) No. 64 (+) - Engine ground 3 (E158) No. 63:
    Engine speed output (B134) No. 10 (+) - Engine ground 3 (E158) No. 63:
    Measuring condition When engine is started
G10264406Courtesy of SUBARU OF AMERICA, INC.
G10264407Courtesy of SUBARU OF AMERICA, INC.
G10264408Courtesy of SUBARU OF AMERICA, INC.
G10264409Courtesy of SUBARU OF AMERICA, INC.
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