2015 Subaru Outback 2.5iFACTORY OEM SERVICE PROCEDURE

Electrical Specification

WARNING: This page is about a different variant/trim than selected.
Fig 1: Engine Control Module (ECM) I/O Signal Connector Terminal Identification
G10263229Courtesy 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 Waveform 1
- 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
Intake camshaft position sensor 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
Exhaust camshaft position sensor 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 1.0 - 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 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 1.0 - 1.4 1.0 - 1.4 -
Manifold absolute pressure sensor signal E158 15 3.5 - 4.8 1.0 - 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 - 3.0 -
Knock sensor shield E158 17 0 0 -
Accelerator pedal position sensor Main sensor 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 sensor power supply B134 30 5 5 -
Main sensor ground B134 33 0 0 -
Sub sensor 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 sensor power supply B134 28 5 5 -
Sub sensor ground B134 34 0 0 -
Intake oil flow control solenoid valve RH E158 20 Battery voltage 0 or battery voltage Waveform 5
Intake oil flow control solenoid valve LH E158 6 Battery voltage 0 or battery voltage Waveform 5
Exhaust oil flow control solenoid valve RH E158 21 0 or battery voltage 0 or battery voltage Waveform 5
Exhaust oil flow control solenoid valve LH E158 7 Battery voltage 0 or battery voltage Waveform 5
Purge control solenoid valve E158 51 Battery voltage Battery voltage In operation: Waveform 6
ELCM 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 7
#2 E158 35 0 0 or 5 Waveform 7
#3 E158 38 0 0 or 5 Waveform 7
#4 E158 36 0 0 or 5 Waveform 8
#5 E158 26 0 0 or 5 Waveform 8
#6 E158 39 0 0 or 5 Waveform 8
Fuel injector #1 E158 23 Battery voltage 0 or battery voltage Waveform 9
#2 E158 8 Battery voltage 0 or battery voltage Waveform 9
#3 E158 9 Battery voltage 0 or battery voltage Waveform 9
#4 E158 22 Battery voltage 0 or battery voltage Waveform 10
#5 E158 52 Battery voltage 0 or battery voltage Waveform 10
#6 E158 13 Battery voltage 0 or battery voltage Waveform 10
EGR control valve Signal 1 E158 12 Battery voltage 0 or battery voltage -
Signal 2 E158 48 Battery voltage 0 or battery voltage -
Signal 3 E158 25 Battery voltage 0 or battery voltage -
Signal 4 E158 49 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 - 2.0
Fully opened: Approx. 4.0 - 4.6
Shield E158 19 0 0 -
Motor (+) E158 14 Duty waveform Duty waveform Drive frequency: 500 Hz
Waveform 6
Motor (-) 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 15
Model with push button start
Waveform 11
Starter cut relay control B134 49 Waveform Waveform Model without push button start
Waveform 15
Model with push button start
Waveform 11
Fuel pump relay control B134 26 0 0 ON: Waveform 13
Radiator fan relay control B134 39 0 0 ON: Waveform 13
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: 10 - 14
Starter switch B134 46 Waveform Waveform Model without push button start
Waveform 15
Model with push button start
Waveform 11
Starter switch 2 B134 58 Waveform Waveform Model without push button start
Waveform 15
Model with push button start
Waveform 11
Accessory cut request B134 64 Waveform Waveform Model without push button start
Waveform 15
Model with push button start
Waveform 12
Engine speed output B134 10 0 0 or battery voltage Model without push button start
Waveform 15
Model with push button start
Waveform 12
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 13
Diagnostic signal B134 8 0 12 - 14 When malfunction occurs: 0
Radiator main fan control B134 41 0 0 ON: 5
Waveform 14
Radiator sub fan control B134 40 0 0 ON: 5
Waveform 14
Generator control B134 23 0 or 6.5 0 or 6.5 Waveform 14
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
    Fig 2: Crankshaft Position Sensor Signal Waveform 1
    G10264391Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Crankshaft position sensor (E158) No. 40 - Chassis ground:
    Intake camshaft position sensor RH (E158) No. 54 - Chassis ground:
    Intake camshaft position sensor LH (E158) No. 41 - Chassis ground:
    Exhaust camshaft position sensor RH (E158) No. 2 - Chassis ground:
    Exhaust camshaft position sensor LH (E158) No. 55 - Chassis ground:
    Measuring condition While engine idling
  2. Waveform 2
    Fig 3: Engine Speed Sensor Signal Waveform 2
    G10264392Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Front oxygen (A/F) sensor RH (E158) No. 46 (+) - Chassis ground:
    Front oxygen (A/F) sensor LH (E158) No. 45 (+) - Chassis ground:
    Engine speed
    Throttle valve opening angle
    Measuring condition (a) Accelerator pedal fully closed (b) Accelerator pedal half open (c) Accelerator pedal fully opened
  3. Waveform 3
    Fig 4: Engine Speed Sensor Signal Waveform 3
    G10264393Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Rear oxygen sensor RH (E158) No. 57 (+) - Chassis ground:
    Rear oxygen sensor LH (E158) No. 59 (+) - Chassis ground:
    Engine speed
    Throttle valve opening angle
    Measuring condition (a) Accelerator pedal fully closed (b) Accelerator pedal fully opened
  4. Waveform 4
    Fig 5: Front Oxygen Sensor Signal Waveform 4
    G10264394Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Front oxygen (A/F) sensor heater RH (E158) No. 5 (+) - Chassis ground:
    Front oxygen (A/F) sensor heater LH (E158) No. 4 (+) - Chassis ground:
    Rear oxygen sensor heater RH (E158) No. 10 (+) - Chassis ground:
    Rear oxygen sensor heater LH (E158) No. 11 (+) - Chassis ground:
    Measuring condition While engine idling
  5. Waveform 5
    Fig 6: Exhaust Oil Flow Control Solenoid Valve Signal Waveform 5
    G10264395Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Intake oil flow control solenoid valve RH (E158) No. 20 (+) - Chassis ground:
    Intake oil flow control solenoid valve LH (E158) No. 6 (+) - Chassis ground:
    Exhaust oil flow control solenoid valve RH (E158) No. 21 (+) - Chassis ground:
    Exhaust oil flow control solenoid valve LH (E158) No. 7 (+) - Chassis ground:
    Measuring condition (a) Accelerator pedal fully closed (b) Accelerator pedal fully opened
  6. Waveform 6
    Fig 7: Purge Control Solenoid Valve Signal Waveform 6
    G10264396Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Electronic throttle control motor (E158) No. 14 (+) - Chassis ground:
    Purge control solenoid valve (E158) No. 51 (+) - Chassis ground:
    Measuring condition While engine idling
    Purge control solenoid valve: At 2000 rpm (during evaporative purge control)
  7. Waveform 7
    Fig 8: Crankshaft Position Sensor Signal Waveform 7
    G10264397Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Crankshaft position sensor (E158) No. 40 (+) - Chassis ground:
    Ignition coil #1 (E158) No. 37 (+) - Chassis ground:
    Ignition coil #2 (E158) No. 35 (+) - Chassis ground:
    Ignition coil #3 (E158) No. 38 (+) - Chassis ground:
    Measuring condition While engine idling
  8. Waveform 8
    Fig 9: Crankshaft Position Sensor Signal Waveform 8
    G10264398Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Crankshaft position sensor (E158) No. 40 (+) - Chassis ground:
    Ignition coil #4 (E158) No. 36 (+) - Chassis ground:
    Ignition coil #5 (E158) No. 26 (+) - Chassis ground:
    Ignition coil #6 (E158) No. 39 (+) - Chassis ground:
    Measuring condition While engine idling
  9. Waveform 9
    Fig 10: Crankshaft Position Sensor Signal Waveform 9
    G10264399Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Crankshaft position sensor (E158) No. 40 (+) - Chassis ground:
    Fuel injector #1 (E158) No. 23 (+) - Chassis ground:
    Fuel injector #2 (E158) No. 8 (+) - Chassis ground:
    Fuel injector #3 (E158) No. 9 (+) - Chassis ground:
    Measuring condition While engine idling
  10. Waveform 10
    Fig 11: Crankshaft Position Sensor Signal Waveform 10
    G10264400Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Crankshaft position sensor (E158) No. 40 (+) - Chassis ground:
    Fuel injector #1 (E158) No. 22 (+) - Chassis ground:
    Fuel injector #2 (E158) No. 52 (+) - Chassis ground:
    Fuel injector #3 (E158) No. 13 (+) - Chassis ground:
    Measuring condition While engine idling
  11. Waveform 11
    Fig 12: Starter Relay Control Signal Waveform 11
    G10263239Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Starter relay control (B134) No. 62 (+) - Chassis ground:
    Starter cut relay control (B134) No. 49 (+) - Chassis ground:
    Starter switch (B134) No. 46 (+) - Chassis ground:
    Starter switch 2 (B134) No. 58 (+) - Chassis ground:
    Measuring condition Engine starting status
  12. Waveform 12
    Fig 13: Starter Cut Relay Control Signal Waveform 12
    G10263240Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Starter cut relay control (E134) No. 49 (+) - Chassis ground:
    Engine speed output (E134) No. 10 (+) - Chassis ground:
    ACC cut request (E134) No. 64 (+) - Chassis ground:
    Battery voltage (battery terminal) (+) - Chassis ground:
    Measuring condition Engine starting status
  13. Waveform 13
    Fig 14: Fuel Pump Control Unit Signal Waveform 13
    G10264403Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Fuel pump control unit (B134) No. 63 (+) - Chassis ground:
    Measuring condition Idling status
  14. Waveform 14
    Fig 15: Radiator Main Fan Control Signal Waveform 14
    G10264404Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Radiator main fan control (B134) No. 41 (+) - Chassis ground:
    Radiator sub fan control (B134) No. 40 (+) - Chassis ground:
    Generator control (B134) (+) - Chassis ground:
    Measuring condition Idling status
    At radiator fan operation
  15. Waveform 15
    Fig 16: Starter Relay Control Signal Waveform 15
    G10263241Courtesy of SUBARU OF AMERICA, INC.
    Measured terminal Starter relay control (B134) No. 62 (+) - Chassis ground:
    Starter cut relay control (B134) No. 49 (+) - Chassis ground:
    Starter switch (B134) No. 46 (+) - Chassis ground:
    Starter switch 2 (B134) No. 58 (+) - Chassis ground:
    ACC cut request (B134) No. 64 (+) - Chassis ground:
    Engine speed output (B134) No. 10 (+) - Chassis ground:
    Measuring condition When engine is started
    Fig 17: Engine Control Module (ECM) I/O Signal - Circuit Diagram (1 Of 4)
    G10264406Courtesy of SUBARU OF AMERICA, INC.
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  • • Brakes feel soft, pull hard to one side, or make grinding noises.
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