IMMOBILISER SYSTEM(w/o Smart Entry and Start System) HOW TO PROCEED WITH TROUBLESHOOTING

CAUTION / NOTICE / HINT

PROCEDURE

1. VEHICLE BROUGHT TO WORKSHOP

   Result
   Proceed to NEXT

   
   

   NEXT

2. CUSTOMER PROBLEM ANALYSIS

   Tech Tips

   
   

   • 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 for problem analysis:

     What	Vehicle model, system name
     When	Date, time, occurrence frequency
     Where	Whether the problem occurs at a specific location
     Under what conditions?	Whether the doors were locked or unlocked, whether the ignition switch was on, whether the engine was running
     How did it happen?	Problem symptoms

   Result
   Proceed to NEXT

   
   

   NEXT

3. INSPECT BATTERY VOLTAGE

   
   

   1. 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.

      Result
      Proceed to NEXT

   
   

   NEXT

4. CRANK ENGINE FOR MORE THAN 10 SECONDS

   Result
   Proceed to NEXT

   
   

   NEXT

5. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

   
   

   1. Using the GTS, check for CAN communication system DTCs.

      Click here

      Result
      Result Proceed to CAN DTCs are not output (for 2AR-FE) A CAN DTCs are not output (for A25A-FKS) B CAN DTCs are output C

   
   

   B

   CHECK FOR DTC* (ECM (for A25A-FKS)) Click here

   C

   GO TO CAN COMMUNICATION SYSTEM Click here

   A

6. CHECK FOR DTC* (ECM (for 2AR-FE))

   
   

   1. Check for DTCs and note any codes that are output.

      Tech Tips

      Before checking for DTCs, perform the "DTC Output Confirmation Operation" of each diagnostic procedure.

      
      Powertrain > Engine and ECT > Trouble Codes

      Result
      Result Proceed to DTCs are not output A SFI system DTCs are output B Immobiliser system DTCs are output C

   
   

   A

   GO TO STEP 8 Click here

   B

   GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

   C

   GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

7. CHECK FOR DTC* (ECM (for A25A-FKS))

   
   

   1. Check for DTCs and note any codes that are output.

      Tech Tips

      Before checking for DTCs, perform the "DTC Output Confirmation Operation" of each diagnostic procedure.

      
      Powertrain > Engine > Trouble Codes

      Result
      Result Proceed to DTCs are not output A SFI system DTCs are output B Immobiliser system DTCs are output C

   
   

   B

   GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

   C

   GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

   A

8. CHECK FOR DTC* (TRANSPONDER KEY ECU ASSEMBLY)

   
   

   1. Check for DTCs and note any codes that are output.

      
      Body Electrical > Immobiliser > Trouble Codes

      Tech Tips

      Before checking for DTCs, perform the "DTC Output Confirmation Operation" of each diagnostic procedure.

      Result
      Result Proceed to DTCs are not output A Immobiliser system DTCs are output B

   
   

   B

   GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

   A

9. PROBLEM SYMPTOMS TABLE

   
   

   1. Refer to Problem Symptoms Table.

      Click here

      Result
      Result Proceed to Fault is not listed in Problem Symptoms Table A Fault is listed in Problem Symptoms Table B

   
   

   B

   GO TO STEP 11 Click here

   A

10. OVERALL ANALYSIS AND TROUBLESHOOTING*

    
    

    1. Data List / Active Test

       Click here

    2. Terminals of ECU

       Click here

       Result
       Proceed to NEXT

    
    

    NEXT

11. REPAIR OR REPLACE

    Tech Tips

    If the transponder key ECU assembly, ECM, or door control transmitter assembly are replaced, refer to Service Bulletin.

    Result
    Result Proceed to for 2AR-FE A for A25A-FKS B

    
    

    B

    CHECK FOR DTC* (for A25A-FKS) Click here

    A

12. CHECK FOR DTC* (for 2AR-FE)

    
    

    1. Clear the DTCs.

       
       Body Electrical > Immobiliser > Clear DTCs
       Powertrain > Engine and ECT > Clear DTCs

    2. Check for DTCs.

       
       Body Electrical > Immobiliser > Trouble Codes
       Powertrain > Engine and ECT > Trouble Codes

       Tech Tips

       Before checking for DTCs, perform the "DTC Output Confirmation Operation" of each diagnostic procedure.

       Result
       Result Proceed to DTCs are not output A Immobiliser system DTCs are output B

    
    

    A

    END

    B

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

13. CHECK FOR DTC* (for A25A-FKS)

    
    

    1. Clear the DTCs.

       
       Body Electrical > Immobiliser > Clear DTCs
       Powertrain > Engine > Clear DTCs

    2. Check for DTCs.

       
       Body Electrical > Immobiliser > Trouble Codes
       Powertrain > Engine > Trouble Codes

       Tech Tips

       Before checking for DTCs, perform the "DTC Output Confirmation Operation" of each diagnostic procedure.

       Result
       Result Proceed to DTCs are not output A Immobiliser system DTCs are output B

    
    

    A

    END

    B

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here