How To Proceed With Troubleshooting

HINT

• Use the following procedure to troubleshoot the engine immobilizer system
• *: Using the Techstream

1. VEHICLE BROUGHT TO WORKSHOP 
2. CUSTOMER PROBLEM ANALYSIS 

   HINT

   • When troubleshooting, confirm that the problem symptoms have been accurately identified Preconceptions should be discarded in order to make an accurate judgment To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
   • Gather as much information as possible for reference Past problems that seem unrelated may also help in some cases
   • The following 5 items are important points in the problem analysis.
   REFERENCE CHART
   
   

   What	Vehicle model, system name
   When	Date, time, occurrence frequency
   Where	Road conditions
   Under what conditions?	Driving conditions, weather conditions
   How did it happen?	Problem symptoms

3. INSPECT BATTERY VOLTAGE 
   1. Measure the battery voltage

      Standard Voltage: 

      11 to 14 V 

      If the voltage is below 11V, recharge or replace the battery before proceeding to the next step.

4. CRANK ENGINE FOR MORE THAN 10 SECONDS 
5. CHECK FOR DTCS* 
   1. Check for DTCs and note any codes that are output.
   2. Clear the DTCs
   3. Recheck for DTCs. Based on the DTCs output above, try to duplicate the SFI system DTC, engine immobilizer system DTC, steering lock system DTC, multiplex communication system DTC or smart access system with push button start (starting) DTC by simulating the symptoms indicated by the DTCs.

      Result 

      RESULT REFERENCE
      
      

      Result	Proceed to
      SFI system DTC output recurs	A
      Engine immobilizer system DTC output recurs	B
      Steering lock system DTC output recurs	C
      Multiplex communication system DTC output recurs	D
      Smart access system with push button start (starting) DTC output recurs	E
      DTC output does not recur	F

   A: Go to DIAGNOSTIC TROUBLE CODE CHART  (See DIAGNOSTIC TROUBLE CODE CHART )

   B: Go to DIAGNOSTIC TROUBLE CODE CHART 

   C: Go to DIAGNOSTIC TROUBLE CODE CHART  (See DIAGNOSTIC TROUBLE CODE CHART )

   D: Go to DIAGNOSTIC TROUBLE CODE CHART  (See DIAGNOSTIC TROUBLE CODE CHART )

   E: Go to DIAGNOSTIC TROUBLE CODE CHART 

   F: Go to next Step 

6. PROBLEM SYMPTOMS TABLE 
   1. Refer to PROBLEM SYMPTOMS TABLE  .

      Result 

      RESULT REFERENCE
      
      

      Result	Proceed to
      Fault is listed in problem symptoms table	A
      Fault is not listed in problem symptoms table	B

   A: Go to step  8

   B: Go to next Step 

7. OVERALL ANALYSIS AND TROUBLESHOOTING* 
   1. Data List / Active Test (See DATA LIST / ACTIVE TEST  )
   2. Terminals of ECU (See TERMINALS OF ECU  )
8. REPAIR OR REPLACE 
9. CONFIRMATION TEST 

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