How To Proceed With Troubleshooting

HINT:

• Use the following procedures to troubleshoot the engine immobilizer system.
• The intelligent tester should be used in steps  3 and  5.

1. VEHICLE BROUGHT TO WORKSHOP 
2. CRANK ENGINE FOR MORE THAN 10 SECONDS 
3. CHECK FOR DTCS 
   1. Check for DTCs and note any codes that are output (See DTC CHECK / CLEAR  ).
   2. Delete the DTCs.
   3. Recheck for DTCs. Based on the DTCs output above, try to duplicate the SFI system DTC or engine immobilizer system DTC by simulating the symptoms indicated by the DTC.

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      DTC output does not reoccur	A
      SFI system DTC output reoccurs	B (See DIAGNOSTIC TROUBLE CODE CHART )
      Engine immobilizer system DTC output reoccurs	C (See DIAGNOSTIC TROUBLE CODE CHART  )

   B:  GO TO SFI SYSTEM

   C: GO TO DTC CHART 

   A: Go to Next Step 

4. PROBLEM SYMPTOMS TABLE 
   1. If the fault is not listed on the problem symptoms table, proceed to A.
   2. If the fault is listed on the problem symptoms table, proceed to B.

   B: GO TO STEP  6

   A: Go to Next Step 

5. OVERALL ANALYSIS AND TROUBLESHOOTING 
   1. See DATA LIST / ACTIVE TEST 
   2. See TERMINALS OF ECU 
6. ADJUST, REPAIR OR REPLACE 
7. CONFIRMATION TEST 

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