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HOMESERVICE MANUALSSUBARU2007IMPREZA BASE, 4D WAGON, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS (DIAGNOSTICS) (H4SO)BASIC DIAGNOSTIC PROCEDUREPROCEDUREENGINE
2007 Subaru Impreza Base, 4D Wagon, Automatic

Basic Diagnostic Procedure: Procedure: Engine

2007 Subaru Impreza Base, 4D Wagon, AutomaticSECTION Engine
DIAGNOSTIC PROCEDURE CHART

Step Cheek Yes No
1 CHECK ENGINE START FAILURE. 
  1. Ask the customer when and how the trouble occurred using the interview check list. <Ref. to CHECK LIST FOR INTERVIEW .CHECK,>
  2. Start the engine.
 Does the engine start? Go to step 2.  Inspection using "Diagnostics for Engine Start Failure". <Ref. to DIAGNOSTICS FOR ENGINE STARTING FAILURE .>
2 CHECK ILLUMINATION OF MALFUNCTION INDICATOR LIGHT.  Does the malfunction indicator light illuminate? Go to step 3.  Inspection using "General Diagnostic Table". <Ref. to INSPECTION , General Diagnostic Table .>
3 CHECK INDICATION OF DTC ON DISPLAY. 
  1. Turn the ignition switch to OFF.
  2. Connect the Subaru Select Monitor or general scan tool to data link connector.
  3. Turn the ignition switch to ON, and run the Subaru Select Monitor or general scan tool.
  4. Read the DTC on Subaru Select Monitor or general scan tool.
 Is DTC displayed on the Subaru Select Monitor or general scan tool? Record the DTC. Repair the trouble cause. <Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) .> Go to step 4.  Repair the related parts.
NOTE: If DTC is not shown on display although the malfunction indicator light illuminates, perform the diagnosis of malfunction indicator light circuit or combination meter. <Ref. to MALFUNCTION INDICATOR LIGHT .>
4 PERFORM DIAGNOSIS. 
  1. Perform the Clear Memory Mode. <Ref. to CLEAR MEMORY MODE .>
  2. Perform the Inspection Mode. <Ref. to INSPECTION MODE .>
 Is DTC displayed on the Subaru Select Monitor or general scan tool? Inspect using "Diagnostic Procedure with Diagnostic Trouble Code (DTC)". <Ref. to DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) .> Finish the diagnosis.
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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.