SFI SYSTEM (w/o Secondary Air Injection System) HOW TO PROCEED WITH TROUBLESHOOTING

*: Use the intelligent tester.

1. VEHICLE BROUGHT TO WORKSHOP

   
   

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2. CUSTOMER PROBLEM ANALYSIS

   
   

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3. CONNECT INTELLIGENT TESTER TO DLC3*

   Tech Tips

   If the display indicates a communication fault in the intelligent tester, inspect the DLC3.

   When any CAN communication system DTCs are output, perform troubleshooting on the CAN communication system first.

   
   

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4. CHECK DTC AND FREEZE FRAME DATA*

   
   

   1. Check for DTCs Click here and freeze frame data.

      Tech Tips

      Record or print DTCs and freeze frame data, if necessary.

      
      

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5. CLEAR DTC AND FREEZE FRAME DATA*

   
   

   1. Clear the DTCs and freeze frame data Click here.

      
      

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6. CONDUCT VISUAL INSPECTION

   
   

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7. SELECT CHECK MODE DIAGNOSIS*

   
   

   1. Switch the ECM from normal mode to check mode.

      Tech Tips

      Refer to Check Mode Procedure Click here.

      
      

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8. CONFIRM PROBLEM SYMPTOMS

   
   

   1. Confirm problem symptoms.

      Tech Tips

      
      

      • Refer to Problem Symptoms Table Click here.

      • If the engine does not start, first perform the "Check DTC" procedure and "Conduct Basic Inspection" procedure below.

      Result	Proceed To
      Malfunction does not occur	A
      Malfunction occurs	B

      
      

      B

      GO TO STEP 10

      A

9. SIMULATE SYMPTOMS

   
   

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10. DTC CHECK*

    
    

    1. Check for DTCs.

       Tech Tips

       Refer to DTC Check / Clear Click here.

       Result	Proceed To
       Trouble code output	A
       No code	B

       
       

       B

       GO TO STEP 12

       A

11. REFER TO DTC CHART

    Tech Tips

    Refer to Diagnostic Trouble Code Chart Click here.

    
    

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    GO TO STEP 14

12. CONDUCT BASIC INSPECTION

    
    

    1. Conduct basic inspection.

       Tech Tips

       Refer to Basic Inspection Click here.

       Result	Proceed To
       Malfunction parts not confirmed	A
       Malfunction parts confirmed	B

       
       

       B

       GO TO STEP 17

       A

13. REFER TO PROBLEM SYMPTOMS TABLE

    Tech Tips

    Refer to Problem Symptoms Table Click here.

    Result	Proceed To
    Malfunction parts not confirmed	A
    Malfunction parts confirmed	B

    
    

    B

    GO TO STEP 17

    A

14. CHECK ECM POWER SOURCE CIRCUIT

    
    

    1. Check the ECM power source circuit.

       Tech Tips

       Refer to ECM Power Source Circuit Click here.

       
       

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15. CIRCUIT INSPECTION

    Result	Proceed To
    Malfunction not confirmed	A
    Malfunction confirmed	B

    
    

    B

    GO TO STEP 18

    A

16. CHECK FOR INTERMITTENT PROBLEMS

    
    

    1. Check for intermittent problems.

       Tech Tips

       Refer to Check for Intermittent Problems Click here.

       
       

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       GO TO STEP 18

17. CONDUCT PARTS INSPECTION

    
    

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18. IDENTIFICATION OF PROBLEM

    
    

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19. ADJUSTMENT AND/OR REPAIR

    
    

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20. CONDUCT CONFIRMATION TEST

    
    

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    END