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Home >> Subaru >> 2015 >> Forester 2.0XT Touring >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics) (H4DOTC) >> Engine Control Module (ECM) I/O Signal >> Electrical Specification >> Notes
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Electrical Specification: Notes

Fig 1: Engine Control Module (ECM) Connectors Terminal Identification
G09480862Courtesy of SUBARU OF AMERICA, INC.
Description Connector No. Terminal No. Signal (V) Remarks
Ignition SW ON (engine OFF) Engine ON (idling)
Crankshaft position sensor Signal E158 19 0 or 5 0 or 5 Waveform
Ground E158 31 0 0 -
Intake camshaft position sensor (LH) E158 21 0 or 5 0 or 5 Waveform
Intake camshaft position sensor (RH) E158 20 0 or 5 0 or 5 Waveform
Exhaust camshaft position sensor (LH) E158 33 0 or 5 0 or 5 Waveform
Exhaust camshaft position sensor (RH) E158 32 0 or 5 0 or 5 Waveform
Camshaft position sensor ground E158 34 0 0 -
Front oxygen (A/F) sensor IP+signal E158 15 1.7 3.3 Waveform
VS+signal E158 27 2.2 4 Waveform
COM signal E158 39 9.8 3.6 Waveform
Heater signal E159 9 12 - 15 0 or 12 - 15 Waveform
Rear oxygen sensor Signal E158 16 0.3 0.1 - 0.9 Waveform
Heater signal E159 3 12 - 15 0 or 12 - 15 Waveform
Air flow sensor Signal B134 16 0.3 1.2 -
Ground B134 28 0 0 -
Intake air temperature sensor (integrated with air flow sensor) E158 5 2.7 3 After engine is warmed up.
Engine coolant temperature sensor E158 38 2.7 1.8 After engine is warmed up.
Engine oil temperature sensor E158 2 2.9 2.1 After engine is warmed up.
Manifold absolute pressure sensor E158 4 1.9 0.8 After engine is warmed up.
Intake air temperature sensor (integrated with manifold absolute pressure sensor) E158 25 3 3 After engine is warmed up.
Fuel pressure sensor E158 6 2 1 After engine is warmed up.
Knock sensor 1 E158 14 2.5 2.5 Waveform
Knock sensor 2 E158 26 2.5 2.5 Waveform
Battery temperature sensor B134 41 2.2 2.1 After engine is warmed up.
Battery current sensor B134 42 2.7 2.1 After engine is warmed up.
Accelerator pedal position sensor Main power supply B134 30 5 5 -
Main signal B134 17 Fully closed: 0.4 - 1.0 Fully opened: 2.4 - 3.7 Fully closed: 0.4 - 1.0 -
Main ground B134 31 0 0 -
Sub signal B134 29 Fully closed: 0.4 - 1.0 Fully opened: 2.4 - 3.7 Fully closed: 0.4 - 1.0 -
Tumble generator valve actuator (LH) Position signal E158 41 3.1 1.0 -
Motor open E159 6 10 - 13 0 or 12 - 15 Waveform
Motor closed E159 22 10 - 13 0 or 12 - 15 Waveform
Tumble generator valve actuator (RH) Position signal E158 40 0.9 3.2 -
Motor open E159 14 10 - 13 0 or 12 - 15 Waveform
Motor closed E159 30 10 - 13 0 or 12 - 15 Waveform
Intake oil control solenoid (LH) E159 15 10 - 13 0 or 12 - 15 Waveform
Intake oil control solenoid (RH) E159 7 10 - 13 0 or 12 - 15 Waveform
Exhaust oil control solenoid (LH) E159 31 10 - 13 0 or 12 - 15 Waveform
Exhaust oil control solenoid (RH) E159 23 10 - 13 0 or 12 - 15 Waveform
Wastegate control solenoid valve E159 11 10 - 13 12 - 15 -
Canister purge control solenoid valve 1 E159 4 10 - 13 0 or 12 - 15 Waveform
Canister purge control solenoid valve 2 E159 12 10 - 13 0 or 12 - 15 Waveform
Ignition control #1 E159 8 0 0 or 5 Waveform
#2 E159 16 0 0 or 5 Waveform
#3 E159 24 0 0 or 5 Waveform
#4 E159 32 0 0 or 5 Waveform
EGR control valve A+ E159 5 10 - 13 0 or 12 - 15 -
A- E159 21 10 - 13 0 or 12 - 15 -
B+ E159 13 10 - 13 0 or 12 - 15 -
B- E159 29 10 - 13 0 or 12 - 15 -
Fuel pump control unit Control signal B134 40 10 - 13 0 or 12 - 15 Waveform
Diagnostic signal B134 44 0 12 - 15 -
High-pressure fuel pump (Hi) E158 10 0 0 or 12 - 15 Waveform
High-pressure fuel pump (Lo) E158 22 0 0 Waveform
Fuel injector Power supply 1 B134 36 10 - 13 12 - 15 -
Power supply 2 B134 48 10 - 13 12 - 15 -
#1 (+) E158 11 0 - Measurement is prohibited while the engine is running.
#1 (-) E158 12 0 -
#2 (+) E158 23 0 -
#2 (-) E158 24 0 -
#3 (+) E158 35 0 -
#3 (-) E158 36 0 -
#4 (+) E158 47 0 -
#4 (-) E158 48 0 -
Electronic throttle control Sensor power supply E158 18 5 5 -
Main signal E158 17 Fully closed: Approx. 0.7 Fully open: Approx. 3.9 Fully closed: Approx. 0.7 After engine is warmed up.
Sub signal E158 29 Fully closed: Approx. 4.4 Fully open: Approx. 1.1 Fully closed: Approx. 4.4 After engine is warmed up.
Ground E158 30 0 0 -
Motor power supply B134 11 10 - 13 12 - 15 -
Electronic throttle control motor (+) E159 2 0 0 or 12 - 15 -
Electronic throttle control motor (-) E159 1 0 0 or 12 - 15 -
Electronic throttle relay control B134 39 0 0 -
Starter relay control B134 14 2.9 2.9 -
Self-shutoff relay control B134 38 0 0 -
Starter cut relay control B134 13 0 0 Model with push button start
Main fan relay control B134 37 10 - 13 0 or 12 - 15 -
Sub fan relay control B134 25 10 - 13 0 or 12 - 15 -
A/C relay control B134 1 10 - 13 0 or 12 - 15 -
A/C switch E158 7 ON: 10 - 13
OFF: 0
ON: 12 - 14
OFF: 0
Manual A/C model
Blower fan switch E158 9 ON: 0
OFF: 10 - 13
ON: 0
OFF: 12 - 14
Manual A/C model
Starter switch B134 45 0 0 Model with push button start Cranking: waveform
Starter switch 2 B134 8 0 0 Cranking: 8 - 14
Ignition switch B134 32 10 - 13 12 - 15 -
Pressure switch B134 7 10 - 13 12 - 15 -
Neutral position switch B134 33 ON: 0
OFF: 10 - 13
ON: 0
OFF: 12 - 15
Switch is ON when select lever is in "P" range or "N" range.
Cruise control Main switch B134 20 ON: 0
OFF: 5
ON: 0
OFF: 5
-
Command switch B134 6 When operating nothing: 3.5 - 4.5
When operating RES/+: 2.5 - 3.5
When operating DISTANCE: 1.5 - 2.5
When operating SET/-: 0.5 - 1.5
When operating CANCEL: 0 - 0.5
When operating nothing: 3.5 - 4.5
When operating RES/+: 2.5 - 3.5
When operating DISTANCE: 1.5 - 2.5
When operating SET/-: 0.5 - 1.5
When operating CANCEL: 0 - 0.5
-
Brake switch 1 (brake switch) B134 43 When brake pedal is depressed: 0
When brake pedal is released: 10 - 13
When brake pedal is depressed: 0
When brake pedal is released: 10 - 13
-
Brake switch 2 (stop light switch) E158 8 When brake pedal is depressed: 10 - 13
When brake pedal is released: 0
When brake pedal is depressed: 10 - 13
When brake pedal is released: 0
-
Oil level switch E158 44 0 0 Oil level LOW: 10 - 14
Accessory cut request B134 2 10 - 13 12 - 15 Model with push button start Cranking: 0
Engine speed output B134 4 10 - 13 0 or 12 - 15 Model with push button start Waveform
Generator control B134 26 1.8 1.8 After engine is warmed up.
CAN communication (Hi) B134 10 - - -
(Lo) B134 9 - - -
Immobilizer communication E158 43 - - -
Delivery mode switch E158 45 10 - 13 12 - 15 -
Control module power supply B134 12 10 - 13 12 - 15 -
B134 24 10 - 13 12 - 15 -
Back-up power supply B134 23 10 - 13 12 - 15 -
Sensor power supply B134 18 5 5 -
E159 19 5 5 -
Shield (sensor system) E158 28 0 0 -
Shield (high-pressure fuel system) E158 46 0 0 -
ELCM Switching valve B134 27 10 - 13 12 - 14 Operating: 0
Pressure sensor B134 15 1 - 4 1 - 4 When ignition switch is turned to ON: atmospheric pressure
Vacuum pump B134 3 10 - 13 12 - 14 Operating: 0
Brake booster pressure sensor E158 13 0.8 - 1.2 1.0 - 1.6 After engine is warmed up. When brake pedal is released
Brake vacuum pump E158 1 0 0 After engine is warmed up.
Brake vacuum pump relay E158 37 10 - 13 12 - 15 After engine is warmed up.
Sensor ground B134 19 0 0 -
E159 27 0 0 -
Ground Engine 1 B134 35 0 0 -
Engine 2 B134 47 0 0 -
Engine 3 E159 10 0 0 -
Engine 4 E159 18 0 0 -
Engine 5 E159 26 0 0 -
Engine 6 E159 17 0 0 -
Engine 7 E159 25 0 0 -