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Home >> Subaru >> 2018 >> Outback 2.5i >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics - Introduction) (H4DO) >> Engine Control Module (ECM) I/O Signal >> Electrical Specification
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Electrical Specification

G12411297Courtesy 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 or 5 0 or 5 Waveform 1, 10 and 11
Ground E158 27 0 0 -
Power supply E158 28 5 5 -
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
Camshaft position sensor ground E158 42 0 0 -
Front oxygen (A/F) sensor (+) signal E158 46 2.8 - 3.2 2.8 - 3.2 Waveform 2
(-) signal E158 33 1.3 - 3.1 2.4 - 2.7 -
Heater signal E158 5 Battery voltage 0 or battery voltage Waveform 4
Rear oxygen sensor (+) signal E158 57 0.1 - 0.3 0.2 - 2.1 Waveform 3
(-) signal E158 56 1.4 - 1.5 1.1 - 1.7 Waveform 3
Heater signal E158 10 Battery voltage 0 or battery voltage Waveform 4
Oxygen sensor shield E158 58 0 0 -
Air flow sensor Signal B134 16 0.6 - 1 0.3 - 4.5 -
Ground B134 17 0 0 -
Shield B134 3 0 0 -
Intake air temperature sensor signal B134 15 0.3 - 4.6 0.3 - 4.6 -
Engine coolant temperature sensor signal E158 43 1 - 1.4 1 - 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 1.4 - 2.1 -
Knock sensor Signal E158 30 2.4 - 2.6 2.1 - 2.8 -
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: 2.4 - 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 -
Tumble generator valve RH Position signal E158 47 Waveform Waveform Waveform 5
Motor open E158 52 Waveform Waveform Waveform 5
Motor closed E158 13 Waveform Waveform Waveform 5
Tumble generator valve LH Position signal E158 59 Waveform Waveform Waveform 6
Motor open E158 26 Waveform Waveform Waveform 6
Motor closed E158 39 Waveform Waveform Waveform 6
Intake oil control solenoid valve RH E158 20 Battery voltage 0 or battery voltage Waveform 7
LH E158 6 Battery voltage 0 or battery voltage Waveform 7
Purge control solenoid valve E158 51 Battery voltage Battery voltage Waveform 8
Operating: 0
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 10
#2 E158 35 0 0 or 5 Waveform 10
#3 E158 38 0 0 or 5 Waveform 10
#4 E158 36 0 0 or 5 Waveform 10
Fuel injector #1 E158 23 Battery voltage 0 or battery voltage Waveform 11
#2 E158 8 Battery voltage 0 or battery voltage Waveform 11
#3 E158 9 Battery voltage 0 or battery voltage Waveform 11
#4 E158 22 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 sensor Main signal E158 29 Approx. 0.7 Approx. 0.6 - 1.2 Fully closed: Approx. 0.6 - 1.2
Fully opened: Approx. 3.8 - 4.4
Sub signal E158 31 Approx. 1.6 Approx. 1.5 - 1.7 Fully closed: Approx. 1.4 - 2.0
Fully opened: Approx. 4.0 - 4.6
Shield E158 19 0 0 -
Motor (+) E158 14 0 or battery voltage 0 or battery voltage Drive frequency: 500 Hz
Waveform 9
Motor (-) E158 1 0 or battery voltage 0 or battery voltage Drive frequency: 500 Hz
Electronic throttle control motor power supply B134 13 Battery voltage Battery voltage -
Electronic throttle relay control B134 65 ON: 0 ON: 0 -
Self-shutoff relay control B134 60 0 0 -
Starter relay control B134 62 Waveform Waveform Model without push button start
Waveform 14
Model with push button start
Waveform 12
Starter cut relay control B134 49 Waveform Waveform Model without push button start
Waveform 14
Model with push button start
Waveforms 12 and 13
Fuel pump relay control B134 63 Battery voltage 0 ON: 0
OFF:
Main fan relay control B134 51 Battery voltage Battery voltage ON: 0
Sub fan relay control B134 37 Battery voltage Battery voltage ON: 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 14
Model with push button start
Waveform 12
Starter switch 2 B134 58 Waveform Waveform Model without push button start
Waveform 14
Model with push button start
Waveform 12
Accessory cut request B134 64 Waveform Waveform Model without push button start
Waveform 14
Model with push button start
Waveform 13
Engine speed output B134 10 0 0 or battery voltage Model without push button start
Waveform 14
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
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 -
NOTE:
  • After engine is warmed up, attach the check board for measurement.
  • Set the select lever in "P" range or "N" range, or the shift lever in neutral.
  • 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
    G11272645Courtesy 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 (-):
    Measuring condition While engine idling
  2. Waveform 2
    G11583259Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Front oxygen (A/F) sensor (+) signal (E158) No. 46 (+) - 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
    G11583260Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Rear oxygen sensor (+) signal (E158) No. 57 (+) - Rear oxygen sensor (-) signal (E158) No. 56 (-):
    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
  4. Waveform 4
    G11583261Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Front oxygen (A/F) sensor heater signal (E158) No. 5 (+) - Engine ground 3 (E158) No. 63 (-):
    Rear oxygen sensor heater signal (E158) No. 10 (+) - Engine ground 3 (E158) No. 63 (-):
    Measuring condition While engine idling
  5. Waveform 5
    G11583262Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Tumble generator valve RH position signal (E158) No. 47 (+) - Engine ground 3 (E158) No. 63 (-):
    Tumble generator valve RH motor open (E158) No. 52 (+) - Engine ground 3 (E158) No. 63 (-):
    Tumble generator valve RH motor closed (E158) No. 13 (+) - Engine ground 3 (E158) No. 63 (-):
    Measuring condition While engine idling
  6. Waveform 6
    G12411303Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Tumble generator valve LH position signal (E158) No. 59 (+) - Engine ground 3 (E158) No. 63 (-):
    Tumble generator valve LH motor open (E158) No. 26 (+) - Engine ground 3 (E158) No. 63 (-):
    Tumble generator valve LH motor closed (E158) No. 39 (+) - Engine ground 3 (E158) No. 63 (-):
    Measuring condition While engine idling
  7. Waveform 7
    G12411304Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Intake oil control solenoid valve RH (E158) No. 20 (+) - Engine ground 3 (E158) No. 63 (-):
    Intake oil control solenoid valve LH (E158) No. 6 (+) - Engine ground 3 (E158) No. 63 (-):
    Measuring condition While engine idling
  8. Waveform 8
    G11583265Courtesy 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)
  9. Waveform 9
    G11583266Courtesy 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
  10. Waveform 10
    G12411307Courtesy 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 (-):
    Ignition coil #4 (E158) No. 36 (+) - Engine ground 3 (E158) No. 63 (-):
    Measuring condition While engine idling
  11. Waveform 11
    G11272653Courtesy 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 (-):
    Fuel injector #4 (E158) No. 22 (+) - Engine ground 3 (E158) No. 63 (-):
    Measuring condition While engine idling
  12. Waveform 12
    G11583269Courtesy 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 When engine is started
  13. Waveform 13
    G11583270Courtesy 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 When engine is started
  14. Waveform 14
    G11583271Courtesy 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
    G12411312Courtesy of SUBARU OF AMERICA, INC.
    G12411313Courtesy of SUBARU OF AMERICA, INC.
    G12411314Courtesy of SUBARU OF AMERICA, INC.
    G12411315Courtesy of SUBARU OF AMERICA, INC.
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