How To Proceed With Troubleshooting

HINT:

• Use the following procedure to troubleshoot the engine immobiliser system.

1. VEHICLE BROUGHT TO WORKSHOP 
2. CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK 
3. CRANK ENGINE FOR MORE THAN 10 SECONDS 
4. CHECK FOR DTCS 
   1. Check for DTCs and note any codes that are output.
   2. Clear the DTCs.
   3. Recheck for DTCs. Try to prompt the DTC (SFI system and engine immobiliser system) by simulating the original activity that the DTC suggested.
      1. If the DTC does not reoccur, proceed to A.
      2. If the DTC (SFI system) reoccurs, proceed to B.
      3. If the DTC (engine immobiliser system) reoccurs, proceed to C.

   B:  Go to SFI SYSTEM

   C: Go to step  8

   A: Go to next step 

5. READ VALUE OF TECHSTREAM 
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch to the ON position and turn the Techstream main switch on.
   3. Select the item Key SW in the Data List and read its value displayed on the Techstream.

      Immobiliser: 

      DATA LIST
      
      

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Key SW	Unlock warning switch signal/ON or OFF	ON. Key is in ignition key cylinder OFF No key is in ignition key cylinder	-

   NG: Go to DTC B2780 

   OK: Go to next step 

6. 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  8

   A: Go to next step 

7. OVERALL ANALYSIS AND TROUBLESHOOTING 
   1. Inspection with the Techstream (Data List).
   2. Inspection with the Techstream (Active Test).
   3. Terminals of ECU (See TERMINALS OF ECU  ).
8. ADJUST, REPAIR OR REPLACE 
9. CONFIRMATION TEST 

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