Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual - part 201

EN(H4DOTC)(diag)-28

Engine Control Module (ECM) I/O Signal

ENGINE (DIAGNOSTICS)

Input/output name:

• Crankshaft position sensor

• Intake camshaft position sensor RH

• Intake camshaft position sensor LH

• Exhaust camshaft position sensor RH (models with SI-DRIVE)

• Exhaust camshaft position sensor LH (models with SI-DRIVE)

Measuring condition:

• After warming-up

• At idling

5 V

10 ms

0

0

0

0

0

EN-07431

INTAKE CAMSHAFT 

POSITION SENSOR LH

INTAKE CAMSHAFT 

POSITION SENSOR RH

CRANKSHAFT 

POSITION SENSOR

EXHAUST CAMSHAFT 

POSITION SENSOR LH

EXHAUST CAMSHAFT 

POSITION SENSOR RH

ONE CRANKSHAFT ROTATION

ONE CAMSHAFT ROTATION

EN(H4DOTC)(diag)-29

Engine Control Module (ECM) I/O Signal

ENGINE (DIAGNOSTICS)

A7

A5

A14

A15

B134

A:

A19

EN-09942

A28

A29

A34

A21

A22

A31

A32

A23

A33

A24

A25

A26

A27

A6

A4

A3

A2

A1

A11

A10

A13

A12

A18

A17

A16

SI

SI

SI

SI

SI

: WITH SI-DRIVE

INTAKE OIL FLOW CONTROL

 SOLENOID VALVE LH

INTAKE OIL FLOW CONTROL

 SOLENOID VALVE LH

ELECTRONIC THROTTLE CONTROL

FUEL INJECTOR No. 3

FUEL INJECTOR No. 4

FUEL INJECTOR No. 1

FUEL INJECTOR No. 2

ELECTRONIC THROTTLE CONTROL

ELECTRONIC THROTTLE CONTROL

ENGINE GROUND

ENGINE GROUND

ENGINE GROUND

INTAKE OIL FLOW CONTROL 

SOLENOID VALVE RH

TUMBLE GENERATOR VALVE ASSY RH

TUMBLE GENERATOR VALVE ASSY RH

TUMBLE GENERATOR VALVE ASSY LH

WASTEGATE CONTROL SOLENOID VALVE

TUMBLE GENERATOR VALVE ASSY LH

IGNITION COIL No. 4

IGNITION COIL No. 3

IGNITION COIL No. 2

IGNITION COIL No. 1

INTAKE OIL FLOW CONTROL 

SOLENOID VALVE RH

GROUNDS

ELECTRONIC THROTTLE CONTROL

POWER LINES

EXHAUST OIL FLOW CONTROL

 SOLENOID VALVE RH

EXHAUST OIL FLOW CONTROL

 SOLENOID VALVE LH

EXHAUST OIL FLOW CONTROL

 SOLENOID VALVE LH

EXHAUST OIL FLOW CONTROL

 SOLENOID VALVE RH

EN(H4DOTC)(diag)-30

Engine Control Module (ECM) I/O Signal

ENGINE (DIAGNOSTICS)

B6

EN-09943

B11

B13

B14

B7

B23

B31

B26

B10

B15

B17

B22

B29

B30

B135

B:

B12

B24

B35

B4

B3

B8

B25

B27

B19

B21

B20

B9

MA

MA

ELCM

CLUTCH SWITCH

: MANUAL A/C MODEL

SECONDARY AIR COMBINATION VALVE RELAY 2

ACCELERATOR PEDAL POSITION SENSOR

A/C CONTROL PANEL

SECONDARY AIR PUMP RELAY

BODY INTEGRATED UNIT

SECONDARY AIR

 COMBINATION VALVE RELAY 1

PRESSURE CONTROL SOLENOID VALVE

A/C RELAY

BODY INTEGRATED UNIT

MAIN FAN RELAY

GROUNDS

ACCELERATOR PEDAL POSITION SENSOR

POWER LINES

ELECTRONIC THROTTLE CONTROL RELAY

COMBINATION METER

FUEL PUMP CU

STARTER RELAY

ACCELERATOR PEDAL POSITION SENSOR

ACCELERATOR PEDAL POSITION SENSOR

ELECTRONIC THROTTLE CONTROL RELAY

DATA LINK CONNECTOR

RELAY CONTROLS

SUB FAN RELAY

REAR OXYGEN SENSOR

EN(H4DOTC)(diag)-31

Engine Control Module (ECM) I/O Signal

ENGINE (DIAGNOSTICS)

C16

EN-09944

C6

C5

C2

C22

C28

C3

C1

C4

C12

C7

C10

C9

C11

C13

C15

C21

C30

C31

C34

C35

C18

C19

C20

B136

C:

C33

C17

C29

MA

AA

AA

MA

ELCM

A/C CONTROL PANEL

EVAPORATOR SENSOR

: AUTO A/C MODEL

: MANUAL A/C MODEL

BODY INTEGRATED UNIT 

(CAN COMMUNICATION)

FUEL PUMP CU

REAR OXYGEN SENSOR

FRONT OXYGEN (A/F) SENSOR

FRONT OXYGEN (A/F) SENSOR

NEUTRAL POSITION SWITCH

DELIVERY (TEST) MODE CONNECTOR

MASS AIR FLOW & INTAKE AIR 

TEMPERATURE SENSOR

F/B FUSE No. 12

BRAKE SWITCH

CRUISE CONTROL SWITCH

MASS AIR FLOW & INTAKE AIR

 TEMPERATURE SENSOR

SHIELDS

MASS AIR FLOW & INTAKE AIR

 TEMPERATURE SENSOR (SHIELD)

PRESSURE SWITCH

CRUISE CONTROL SWITCH

GROUNDS

MAIN RELAY

STOP LIGHT SWITCH

BODY INTEGRATED UNIT 

(CAN COMMUNICATION)

MASS AIR FLOW & INTAKE AIR 

TEMPERATURE SENSOR

M/B FUSE No. 13

FRONT OXYGEN (A/F) SENSOR

FRONT OXYGEN (A/F) SENSOR

STARTER RELAY