How To Proceed With Troubleshooting

HINT: 

• Use these procedures to troubleshoot the engine immobiliser system.

• The Techstream should be used in steps 3, 4 and 6.

1. VEHICLE BROUGHT TO WORKSHOP 

   NEXT: Go to next step 

2. CRANK ENGINE FOR MORE THAN 10 SECONDS 

   NEXT: Go to next step 

3. INSPECT COMMUNICATION FUNCTION MULTIPLEX COMMUNICATION SYSTEM (BEAN) 
   1. Use the Techstream to check for normal function of the multiplex communication system (BEAN).
      1. (ECU connected, communication line malfunctioning) Without code outputs, proceed to A.
      2. (ECU connected, communication line malfunctioning) With code outputs, proceed to B.

      B → Go to MULTIPLEX COMMUNICATION SECTION 

      A: Go to next step 

4. CHECK FOR DTC 
   1. Check for DTCs and note any codes that are output. Refer to DTC CHECK / CLEAR .
   2. Delete the DTC.
   3. Recheck for DTCs. Based on the DTCs output above, try to duplicate the SFI system DTC or engine immobiliser system DTC by simulating the symptoms indicated by the DTC.

      Result

      Result	Proceed to
      DTC output does not reoccur	A
      SFI system DTC output reoccurs	B
      Engine immobiliser system DTC output reoccurs	C

      B → Go to SFI SYSTEM 

      C → Go to DTC chart 

      A: Go to next step 

5. 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 7 

      A: Go to next step 

6. OVERALL ANALYSIS AND TROUBLESHOOTING 
   1. DATA LIST/ACTIVE TEST. Refer to DATA LIST / ACTIVE TEST .
   2. Terminals of ECU. Refer to TERMINALS OF ECU .

      NEXT: Go to next step 

7. ADJUST, REPAIR OR REPLACE 

   NEXT: Go to next step 

8. CONFIRMATION TEST 

   NEXT → END