How To Proceed With Troubleshooting

THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

HINT
* Use the following procedure to troubleshoot the engine immobiliser system.
* *: Using the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP

NEXT -- Continue to next step.

2. CUSTOMER PROBLEM ANALYSIS

HINT
* In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
* Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
* The following 5 items are important points in the problem analysis:





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*

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

(b) Clear the DTCs.

(c) Recheck for DTCs. Try to duplicate the DTCs (SFI system and engine immobiliser system) by simulating the symptoms indicated by the DTCs.

Result:





B -- Go to DIAGNOSTIC TROUBLE CODE CHART SFI System

C -- Go to DIAGNOSTIC TROUBLE CODE CHART SFI System

D -- Go to DIAGNOSTIC TROUBLE CODE CHART Engine Immobilizer System
A -- Continue to next step.

6. 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) Read the Data List according to the display on the Techstream.

Immobiliser (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 B2780
OK -- Continue to next step.

7. PROBLEM SYMPTOMS TABLE

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

Result:





A -- Go to step 9
B -- Continue to next step.

8. 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.

9. REPAIR OR REPLACE

NEXT -- Continue to next step.

10. CONFIRMATION TEST

NEXT -- END