How To Proceed With Troubleshooting

THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM (w/ Smart Key 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

(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. ENGINE SWITCH ON (IG)

HINT
If the engine switch cannot be turned on (IG), communication with the Techstream can be confirmed by connecting the Techstream to the vehicle and turning a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins.

NEXT -- Continue to next step.

5. INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

(a) Use the Techstream to check if the CAN communication system is functioning normally.

Result

B -- GO TO CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting
A -- Continue to next step.

6. INSPECT COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*

(a) Use the Techstream to check if the LIN communication system is functioning normally.

Result

B -- GO TO LIN COMMUNICATION SYSTEM LIN Communication System
A -- Continue to next step.

7. CHECK FOR DTCS (SMART KEY SYSTEM)*

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

(b) Clear the DTCs Engine Immobiliser System (w/ Smart Key System).

(c) Recheck for DTCs Smart Key System (for Start Function). Based on the DTCs output above, try to cause the output of the same SFI system, steering lock system or engine immobiliser system DTC by reproducing the symptoms indicated by the DTC.

Result

B -- GO TO DIAGNOSTIC TROUBLE CODE CHART SFI System

C -- GO TO DIAGNOSTIC TROUBLE CODE CHART Steering Lock System

D -- GO TO DIAGNOSTIC TROUBLE CODE CHART Engine Immobiliser System (w/ Smart Key System)
A -- Continue to next step.

8. PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table Engine Immobiliser System (w/ Smart Key System).

Result

B -- Go to step 11
A -- Continue to next step.

9. OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Data List / Active Test Engine Immobiliser System (w/ Smart Key System)

(b) Terminals of ECU Engine Immobiliser System (w/ Smart Key System)

NEXT -- Continue to next step.

10. ADJUST, REPAIR OR REPLACE

NEXT -- Continue to next step.

11. CHECK FOR DTC*

(a) Clear the DTCs Engine Immobiliser System (w/ Smart Key System).

(b) Recheck for DTCs Engine Immobiliser System (w/ Smart Key System). Based on the DTCs output above, try to cause the output of the same SFI system, steering lock system or engine immobiliser system DTC by reproducing the symptoms indicated by the DTC.

HINT
Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure Engine Immobiliser System (w/ Smart Key System).

Result