How To Proceed With Troubleshooting

ENGINE IMMOBILIZER: ENGINE IMMOBILIZER SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

HOW TO PROCEED WITH TROUBLESHOOTING
HINT:
- Use the following procedure to troubleshoot the engine immobilizer system.
- The Techstream should be used in steps 4, 5 and 7.

1. VEHICLE BROUGHT TO WORKSHOP
NEXT -- Continue to next step.
2. CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK
NEXT -- Continue to next step.
3. CRANK ENGINE FOR MORE THAN 10 SECONDS
NEXT -- Continue to next step.
4. CHECK FOR DTCS
(a) Check for DTCs and note any codes that are output.
(b) Delete the DTCs.
(c) Recheck for DTCs. Try to prompt the DTC (SFI system and engine immobilizer 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 immobilizer system) reoccurs, proceed to C.
B -- Go to SFI SYSTEM
C -- Go to step 8
A -- Continue to next step.
5. READ VALUE USING TECHSTREAM
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to the ON position
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Immobilizer / Data List.
(e) Read the Data List according to the display on the Techstream.

Immobilizer (Transponder Key ECU Assembly)





OK:
On the Techstream screen, the item changes between ON and OFF according to the chart above.
NG -- Go to DTC B2780
OK -- Continue to next step.
6. PROBLEM SYMPTOMS TABLE
(a) If the fault is not listed on the problem symptoms table, proceed to A.
(b) If the fault is listed on the problem symptoms table, proceed to B.
B -- Go to step 8
A -- Continue to next step.
7. OVERALL ANALYSIS AND TROUBLESHOOTING
(a) Inspection with the Techstream (DATA LIST).
(b) Inspection with the Techstream (ACTIVE TEST).
(c) Terminals of ECU Engine Immobilizer System.
NEXT -- Continue to next step.
8. ADJUST, REPAIR OR REPLACE
NEXT -- Continue to next step.
9. CONFIRMATION TEST
NEXT -- END