How To Proceed With Troubleshooting

HINT: 

• Use the following procedures to troubleshoot the key reminder warning system.
• *: Use a Techstream.

1. VEHICLE BROUGHT TO WORKSHOP 

   NEXT: Refer to next step 

2. CUSTOMER PROBLEM ANALYSIS CHECK 

   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:
   
   

   What	Vehicle model, system name
   When	Date, time, occurrence frequency
   Where	Road conditions
   Under what conditions?	Driving conditions, weather conditions
   How did it happen?	Problem symptoms

   NEXT: Refer to next step 

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.

      NEXT: Refer to next step 

4. CHECK COMMUNICATION FUNCTION CAN COMMUNICATION SYSTEM* 
   1. Use the Techstream to check if the CAN communication system is functioning normally.
      RESULT
      
      

      Result	Refer to
      CAN DTC is not output	A
      CAN DTC is output	B

      B → Refer to CAN COMMUNICATION SYSTEM (DIAGNOSIS SYSTEM). Refer to  DIAGNOSIS SYSTEM 

      A: Refer to next step 

5. PROBLEM SYMPTOMS TABLE 
   RESULT
   
   

   Result	Refer to
   Fault is not listed in problem symptoms table	A
   Fault is listed in problem symptoms table	B

   B → Refer to step 7 

   A: Refer to next step 

6. OVERALL ANALYSIS AND TROUBLESHOOTING* 
   1. Operation Check. Refer to OPERATION CHECK 
   2. Terminals of ECU. Refer to TERMINALS OF ECU 
   3. DATA LIST/ACTIVE TEST. Refer to DATA LIST / ACTIVE TEST 

      NEXT: Refer to next step 

7. REPAIR OR REPLACE 

   NEXT: Refer to next step 

8. CONFIRMATION TEST* 

   NEXT → END