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. START HYBRID CONTROL SYSTEM





B -- Go to HYBRID CONTROL SYSTEM
A -- Continue to next step.

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

(a) Using the Techstream, check if the Multiplex Communication System (MPX) is functioning normally Reading and Clearing Diagnostic Trouble Codes.





B -- Go to MULTIPLEX COMMUNICATION SECTION
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) Delete the DTC.

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





B -- Go to HYBRID CONTROL SYSTEM

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

6. PROBLEM SYMPTOMS TABLE





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

7. OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) DATA LIST/ACTIVE TEST Engine Immobiliser System

(b) Terminals of ECU Engine Immobiliser System

NEXT -- Continue to next step.

8. ADJUST, REPAIR OR REPLACE

NEXT -- Continue to next step.

9. CONFIRMATION TEST

NEXT -- END