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Home >> Subaru >> 2007 >> Impreza Base, 4D Sedan, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 7 (Cruise Control System (Diagnostics)) >> Engine Control Module (ECM) I/O Signal >> Electrical Specification

Electrical Specification

WARNING: This page is about a different car, the 2006 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Engine Control Module I/O Signal Connector
G05004622
ELECTRICAL SPECIFICATION

Content Terminal No. Measuring condition and I/O signal (ignition switch ON and engine idling Except cruise set light)
Clutch switch Except STi model: C25 STi model: A1
  • Battery voltage is present when the clutch pedal is released.
  • "0" volt is present when the clutch pedal is depressed.
Cruise set indicator light Except STi model: B3 STi model: A16 (Press the main switch and drive the vehicle at 40 km/h (25 MPH) or more.)
  • Battery voltage is present when the set switch is turned to OFF.
  • "0" volt is present when the set switch is turned to ON.
Cruise indicator light Except STi model: B6 STi model: A15
  • Battery voltage is present when the main switch is turned to OFF.
  • "0" volt is present when the main switch is turned to ON.
Main power supply VB (CONTROL 1)
VB (CONTROL 2)
Except STi model: B5 STi model: B19 Battery voltage is present.
Vehicle speed signal Non-turbo model: C12 Turbo model: C13 STi model: B26 Lift-up the vehicle until all four wheels are raised off the ground, and then rotate any wheel manually. Approx. "5 V" and "0 V" pulse signals are alternately input to ECM.
SET/COAST switch Except STi model: B24 STi model: C11
  • Battery voltage is present when the cruise control command switch is turned to SET/COAST position.
  • "0" volt is present when the cruise control command switch is released.
RES/ACC switch Except STi model: B13 STi model: C10
  • Battery voltage is present when the cruise control command switch is turned to RES/ACC position.
  • "0" volt is present when the cruise control command switch is released.
Brake switch 1 (Brake switch) Except STi model: B20 STi model: C9
  • Battery voltage is present when the brake pedal is released.
  • "0" volt is present when the brake pedal is depressed.
Brake switch 2 (Stop light switch) Except STi model: B28 STi model: C8
  • Battery voltage is present when the brake pedal is depressed.
  • "0" volt is present when the brake pedal is released.
Cruise control main switch Except STi model: B12 STi model: C7
  • Battery voltage is present while the cruise control main switch is depressed or is turned to ON.
  • "0" volt is present when the cruise control main switch is turned to OFF.
Ground GND (CONTROL 1) Except STi model: C15 STi model: D2 -
GND (CONTROL 2) Except STi model: A5 STi model: D1 -
Ignition switch Non-turbo model: B27 Turbo model: B19 STi model: D14
  • Battery voltage is present with the ignition switch is turned to ON.
  • "0" volt is present when the ignition switch is turned to OFF.
Neutral position switch (MT model) Except STi model: C31 STi model: D9
  • Battery voltage is present when the shift lever is in anywhere except neutral position.
  • "0" volt is present when the shift lever is in neutral position.
Neutral signal (AT model) C31
  • "Approx. 5 V" voltage (4AT model) or battery voltage (5AT model) is present when the shift lever is set in any position except "P" or "N".
  • "0 V" voltage is present when the shift lever is set in "P" or "N" position.