How to proceed with troubleshooting

HINT:

• Use this procedure to troubleshoot the engine immobiliser system.
• The intelligent tester should be used in steps 4, 5 and 7.

1 VEHICLE BROUGHT TO WORKSHOP

2 CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK

3 CRANK ENGINE FOR MORE THAN 10 SECONDS

4 CHECK FOR DTC

1. 1
   Check for DTCs and note any codes that are output.
2. 2
   Delete the DTC.
3. 3
   Recheck for DTCs. Try to prompt the DTC (SFI system and engine immobiliser system) by simulating the original activity that the DTC suggested.
4. 4
   If the DTC does not reoccur, proceed to A.
5. 5
   If the DTC (SFI system) reoccurs, proceed to B.
6. 6
   If the DTC (engine immobiliser system) reoccurs, proceed to C.

5 READ VALUE OF INTELLIGENT TESTER ((IMMOBILISER ECU (TRANSPONDER KEY ECU ASSEMBLY) (SWITCH CONDITION))

1. 1
   Connect the intelligent tester to the DLC3.
2. 2
   Turn the ignition switch ON and push the intelligent tester main switch ON.
3. 3
   Select the item KEY SW in the DATA LIST and read its value displayed on the intelligent tester.

Transponder key ECU

6 PROBLEM SYMPTOMS TABLE

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

7 OVERALL ANALYSIS AND TROUBLESHOOTING

1. 1
   Inspection with the intelligent tester (ECU DATA MONITOR).
2. 2
   Inspection with the intelligent tester (ACTIVE TEST).
3. 3
   Terminals of ECU

8 ADJUST, REPAIR OR REPLACE

9 CONFIRMATION TEST

END