2022 Subaru Legacy BaseFACTORY OEM SERVICE PROCEDURE

Active Test: List

Active test item Contents Execution condition
Fuel Pump Relay ON/OFF of the fuel pump can be set. Ignition switch ON (engine OFF)
CPC Solenoid Valve ON/OFF of the purge control solenoid valve can be set.
Radiator Fan Relay ON/OFF of the radiator fan relay can be set.
ELCM switching valve ON/OFF of the leak check valve assembly switching valve can be set.
ELCM pump ON/OFF of the leak check valve assembly vacuum pump can be set.
Coolant Circulation Valve Control The thermo-control valve opening angle can be set.
Fuel Pump Control (OFF Drive) Fuel pump can be set to OFF.
  • Idling
  • Select lever is in "P" range or "N" range.
  • Vehicle speed 0 km/h (0 MPH)
Fixed Idle Ignition Timing Idle ignition timing can be set according to engine speed.
Idle Speed Control Idle speed can be set.
Injection Stop Mode (Injector 1)
Injection Stop Mode (Injector 2)
Injection Stop Mode (Injector 3)
Injection Stop Mode (Injector 4)		 Injector of each cylinder can be set to stop the fuel injection.
Injection Quantity Control The amount of fuel injection can be set.
EGR Valve Control (Step) STEP number of the EGR control valve can be set.
Alternator control Alternator control mode can be set to one of the followings:
  • Low mode
  • Middle mode
  • High mode
  • ExHigh mode
Active Grille Shutter Control(1) Open ↔ close of the active grille shutter can be set.
  • Ignition switch ON (engine OFF)
  • Experienced 20 seconds or more of the elapsed time after starting engine (when replacing ECM)
Compression monitor Compression can be measured.
  • Ignition switch ON (engine OFF)
  • Accelerator pedal is fully depressed
(1) After replacing ECM or active grille shutter, be sure to perform this procedure.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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