How to Proceed With Troubleshooting

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

HINT
Use the following procedure to troubleshoot the engine immobiliser system.

*: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP

NEXT -- Continue to next step.

2. CUSTOMER PROBLEM ANALYSIS CHECK

(a) Interview the customer to confirm the trouble How to Proceed With Troubleshooting.

NEXT -- Continue to next step.

3. INSPECT BATTERY VOLTAGE

(a) Measure the battery voltage.

Standard voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.

NEXT -- Continue to next step.

4. CRANK ENGINE FOR MORE THAN 10 SECONDS

NEXT -- Continue to next step.

5. CHECK FOR DTCS (ENGINE IMMOBILISER SYSTEM)*

(a) Check for DTCs and note any codes that are output.

(b) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(c) Recheck for DTCs. Based on the DTCs output above, try to duplicate the engine immobiliser system DTC by simulating the symptoms indicated by the DTCs.

Result





B -- GO TO DIAGNOSTIC TROUBLE CODE CHART Engine Immobilizer System
A -- Continue to next step.

6. CHECK FOR DTCS (SFI SYSTEM)*

(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(b) Recheck for DTCs.

HINT
The DTCs for the engine immobiliser system are specified above. If other codes are output, check the DTC chart for the SFI system.

Result





B -- GO TO DIAGNOSTIC TROUBLE CODE CHART Engine Immobilizer System

C -- GO TO SFI SYSTEM SFI System
A -- Continue to next step.

7. READ VALUE USING TECHSTREAM*

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Immobiliser / Data List.

(e) According to the display on the Techstream, read the Data List.

Immobiliser





OK:

On the Techstream screen, the item changes between ON and OFF according to the chart above.

NG -- GO TO DTC B2780 B2780
OK -- Continue to next step.

8. PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table Symptom Related Diagnostic Procedures.

Result





B -- Go to step 10
A -- Continue to next step.

9. OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Data List / Active Test Scan Tool Testing and Procedures

(b) Terminals of ECU Pinout Values and Diagnostic Parameters

NEXT -- Continue to next step.

10. REPAIR OR REPLACE

NEXT -- Continue to next step.

11. CONFIRMATION TEST

NEXT -- END