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Subaru Crosstrek Service Manual: Engine control module (ecm) i/o signal Electrical specification

Subaru Crosstrek Service Manual / Engine (diagnostics)(h4do) / Engine control module (ecm) i/o signal Electrical specification

ENGINE (DIAGNOSTICS)(H4DO) > Engine Control Module (ECM) I/O Signal

ELECTRICAL SPECIFICATION

1. ENGINE CONTROL MODULE (ECM)

    Description

    Connector No.

    Terminal No.

    Signal (V)

    Note

    Ignition SW ON

    (Engine OFF)

    Engine ON

    (Idling)

    Crankshaft position sensor

    (+) signal

    B136

    16

    5

    0 or 5

    Waveform*

    (−) signal

    B136

    27

    0

    0

    Front oxygen (A/F) sensor

    (+) signal

    B136

    19

    2.8 — 3.2

    2.8 — 3.2

    (−) signal

    B136

    18

    2.4 — 2.7

    2.4 — 2.7

    Rear oxygen sensor

    Signal

    B136

    21

    0

    0 — 0.9

    Front oxygen (A/F) sensor heater signal

    B136

    5

    Battery voltage

    0 or battery voltage

    Waveform

    Rear oxygen sensor heater signal

    B134

    6

    Battery voltage

    0 or battery voltage

    Waveform

    Oxygen sensor

    Shield

    B136

    30

    0

    0

    Engine coolant temperature sensor

    Signal

    B134

    30

    1 — 1.4

    1 — 1.6

    Air flow sensor

    Signal

    B137

    22

    0.3 — 4.5

    Shield

    B137

    28

    0

    0

    Ground

    B137

    29

    0

    0

    Intake air temperature sensor signal

    B137

    12

    0.3 — 4.6

    0.3 — 4.6

    Engine oil temperature sensor signal

    B134

    20

    1 — 1.4

    1 — 1.6

    Starter switch

    B137

    17

    Waveform

    Waveform

    Model without push button start: Waveform

    Models with push button start: Waveform

    Accessory cut request

    B135

    32

    Waveform

    Waveform

    Model without push button start: Waveform

    Models with push button start: Waveform

    Starter switch 2

    B137

    14

    Waveform

    Waveform

    Model without push button start: Waveform

    Models with push button start: Waveform

    Starter cut relay

    B135

    34

    Waveform

    Waveform

    Model without push button start: Waveform

    Models with push button start: Waveform

    Ignition switch

    B137

    27

    Battery voltage

    Battery voltage

    Neutral position switch

    B137

    16

    ON: 0

    OFF: Battery voltage

    ON: 0

    OFF: Battery voltage

    Delivery mode switch

    B137

    13

    Battery voltage

    Battery voltage

    When fuse is installed: 0

    Knock sensor

    Signal

    B136

    28

    2.5

    2.5

    Shield

    B136

    29

    0

    0

    Back-up power supply

    B137

    2

    Battery voltage

    Battery voltage

    Control module power supply

    B136

    6

    Battery voltage

    Battery voltage

    B137

    1

    Battery voltage

    Battery voltage

    Sensor power supply

    B134

    19

    5

    5

    B135

    22

    5

    5

    Ignition control

    #1

    B134

    21

    0

    0 or 5

    Waveform

    #2

    B134

    10

    0

    0 or 5

    Waveform

    #3

    B134

    31

    0

    0 or 5

    Waveform

    #4

    B134

    8

    0

    0 or 5

    Waveform

    Fuel injector

    #1

    B134

    12

    Battery voltage

    0 or battery voltage

    Waveform

    #2

    B134

    22

    Battery voltage

    0 or battery voltage

    Waveform

    #3

    B134

    32

    Battery voltage

    0 or battery voltage

    Waveform

    #4

    B134

    13

    Battery voltage

    0 or battery voltage

    Waveform

    Fuel pump relay control

    B135

    19

    Battery voltage

    ON: 0.5 or less

    OFF: Battery voltage

    A/C relay control

    B135

    35

    ON: 0.5 or less

    OFF: Battery voltage

    ON: 0.5 or less

    OFF: Battery voltage

    A/C switch

    B137

    26

    ON: Battery voltage

    OFF: 0

    ON: Battery voltage

    OFF: 0

    Manual A/C model

    Blower fan switch

    B137

    20

    ON: 0

    OFF: Battery voltage

    ON: 0

    OFF: Battery voltage

    Manual A/C model

    A/C middle pressure switch

    B137

    8

    ON: 0

    OFF: Battery voltage

    ON: 0

    OFF: Battery voltage

    Main fan relay control

    B135

    12

    ON: 0.5 or less

    OFF: Battery voltage

    ON: 0.5 or less

    OFF: Battery voltage

    Sub fan relay control

    B135

    11

    ON: 0.5 or less

    OFF: Battery voltage

    ON: 0.5 or less

    OFF: Battery voltage

    Engine speed output

    B135

    15

    0 or battery voltage

    Waveform

    Purge control solenoid valve

    B134

    11

    Battery voltage

    Battery voltage

    When in operation: 0 or battery voltage

    EGR control valve

    Signal 1

    B136

    11

    Battery voltage

    0 or battery voltage

    Signal 2

    B136

    13

    Battery voltage

    0 or battery voltage

    Signal 3

    B136

    31

    Battery voltage

    0 or battery voltage

    Signal 4

    B136

    32

    Battery voltage

    0 or battery voltage

    Manifold absolute pressure sensor signal

    B136

    20

    3.4 — 3.8

    1 — 1.6

    Electronic throttle control

    Main signal

    B134

    18

    Approx. 0.7

    Approx. 0.6 — 0.7

    Fully closed: Approx. 0.6

    Fully open: Approx. 4.0

    Sub signal

    B134

    28

    Approx. 1.6

    Approx. 1.5 — 1.6

    Fully closed: Approx. 1.5

    Fully open: Approx. 4.2

    Electronic throttle control motor (+)

    B134

    2

    Duty waveform

    Duty waveform

    Drive frequency: 500 Hz

    Electronic throttle control motor (−)

    B134

    1

    Duty waveform

    Duty waveform

    Drive frequency: 500 Hz

    Electronic throttle control motor power supply

    B135

    7

    Battery voltage

    Battery voltage

    Electronic throttle control motor relay

    B135

    17

    0

    0

    Intake oil control solenoid RH

    B134

    17

    Battery voltage

    0 or battery voltage

    Waveform

    Intake oil control solenoid LH

    B134

    16

    Battery voltage

    0 or battery voltage

    Waveform

    Exhaust oil control solenoid RH

    B134

    7

    Battery voltage

    0 or battery voltage

    Waveform

    Exhaust oil control solenoid LH

    B134

    5

    Battery voltage

    0 or battery voltage

    Waveform

    Intake camshaft position sensor RH

    B136

    26

    0 or 5

    0 or 5

    Waveform*

    Intake camshaft position sensor LH

    B136

    15

    0 or 5

    0 or 5

    Waveform*

    Exhaust camshaft position sensor RH

    B136

    14

    0 or 5

    0 or 5

    Waveform*

    Exhaust camshaft position sensor LH

    B136

    25

    0 or 5

    0 or 5

    Waveform*

    Camshaft position sensor ground

    B136

    34

    0

    0

    Accelerator pedal position sensor

    Main signal

    B135

    23

    Fully closed: 0.4 — 1

    Fully opened: 2.4 — 3.7

    Fully closed: 0.4 — 1

    Fully opened: 2.4 — 3.7

    Main power supply

    B135

    21

    5

    5

    Ground

    (main)

    B135

    29

    0

    0

    Sub signal

    B135

    31

    Fully closed: 0.3 — 1.1

    Fully opened: 2.3 — 3.8

    Fully closed: 0.3 — 1.1

    Fully opened: 2.3 — 3.8

    Starter relay

    B135

    26

    Waveform

    Waveform

    Model without push button start: Waveform

    Models with push button start: Waveform

    Clutch switch

    B137

    15

    ON: 0

    OFF: Battery voltage

    ON: 0

    OFF: Battery voltage

    Brake switch 1

    (Brake switch)

    B137

    7

    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)

    B137

    3

    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 command switch

    B137

    30

    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

    Cruise control main switch

    B137

    23

    ON: 0

    OFF: 5

    ON: 0

    OFF: 5

    CAN communication

    (MAIN-CAN)

    (Hi)

    B137

    19

    (Lo)

    B137

    18

    Self-shutoff control

    B135

    13

    0

    0

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