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Basic Diagnostic Procedure: Procedure: Engine

DIAGNOSTIC PROCEDURE

Step Check 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 , Check List for Interview.
  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 COMMUNICATION STATUS. 
  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.
    NOTE:
    • Subaru Select Monitor

      For detailed procedures, refer to "Subaru Select Monitor". Ref. to SUBARU SELECT MONITOR .

    • General scan tool

      For detailed operation procedures, refer to the general scan tool operation manual.

 Does Subaru select monitor or general scan tool communicate with vehicle normally? Go to step 4  . Inspection using LAN system "Diagnostic Procedure with Diagnostic Trouble Code (DTC)". Ref. to COMMUNICATION FOR INITIALIZING IMPOSSIBLE , Diagnostic Procedure with Diagnostic Trouble Code (DTC).
4 CHECK DTC. 
Read DTC using Subaru Select Monitor or general scan tool.
NOTE:
  • Subaru Select Monitor

    Refer to "Read Diagnostic Trouble Code" for detailed operation procedure. Ref. to READ DIAGNOSTIC TROUBLE CODE (DTC) .

  • General scan tool

    For detailed operation procedures, refer to the general scan tool operation manual.

 Is DTC displayed on 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 5  . 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 .
5 CHECK FREEZE FRAME DATA. 
Check the freeze frame data using the Subaru Select Monitor or general scan tool.
NOTE:
  • Subaru Select Monitor

    For detailed procedures, refer to "Subaru Select Monitor". Ref. to SUBARU SELECT MONITOR .

  • General scan tool

    For detailed operation procedures, refer to the general scan tool operation manual.

 Is freeze frame data displayed on Subaru Select Monitor or general scan tool? Record the freeze frame data. Repair the cause of fault, and go to the next step. Go to step 6  . Go to step 6  .
6 PERFORM DIAGNOSIS. 
  1. Perform the Clear Memory Mode. Ref. to CLEAR MEMORY MODE .
  2. Perform the Inspection Mode or drive cycle. Ref. to INSPECTION MODE . Ref. to DRIVE CYCLE .
 Is DTC displayed on 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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