How To Proceed With Troubleshooting

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

HINT
* Use these procedures to troubleshoot the engine immobilizer system.
* *: Use the Techstream.
1. VEHICLE BROUGHT TO WORKSHOP

NEXT -- Continue to next step.

2. INSPECT BATTERY VOLTAGE

Standard voltage:

11 to 14 V

* If the voltage is below 11 V, recharge or replace the battery before proceeding.

NEXT -- Continue to next step.

3. CRANK ENGINE FOR MORE THAN 10 SECONDS

NEXT -- Continue to next step.

4. INSPECT COMMUNICATION FUNCTION OF LARGE-SCALE MULTIPLEX COMMUNICATION SYSTEM (BEAN)*

(a) Using the Techstream, check if the Multiplex Communication System (MPX) is functioning normally Multiplex Communication System.





B -- Go to MULTIPLEX COMMUNICATION SYSTEM
A -- Continue to next step.

5. CHECK FOR DTC*

(a) Check for DTCs and note any codes that are output Reading and Clearing Diagnostic Trouble Codes.

(b) Clear the DTC.

(c) Recheck for DTCs. Based on the DTC output above, try to force output of the same SFI system DTC SFI System or engine immobilizer system DTC Engine Immobilizer System by simulating the symptoms indicated by the DTC.





B -- Go to SFI SYSTEM

C -- Go to step 7
A -- Continue to next step.

6. PROBLEM SYMPTOMS TABLE

(a) Refer to the table [1][2]Engine Immobilizer System.





B -- Go to step 8
A -- Continue to next step.

7. OVERALL ANALYSIS AND TROUBLESHOOTING

(a) Data List / Active Test Engine Immobilizer System

(b) 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