How To Proceed With Troubleshooting

HINT: 

• Use the following procedure to troubleshoot the power door lock control system.
• *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP 

   NEXT: Go 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 for problem analysis:

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

   NEXT: Go to next step 

3. INSPECT AUXILIARY BATTERY VOLTAGE 
   1. Measure the auxiliary battery voltage with the power switch off.

      Standard Voltage

      11 to 14 V

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

      NEXT: Go to next step 

4. INSPECT COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM* 
   1. Use the Techstream to check if the LIN communication system is functioning normally. Refer to DTC CHECK / CLEAR .

      Result

      Result	Proceed to
      DTC is not output	A
      DTC is output	B

      B → GO TO LIN COMMUNICATION SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART 

      A: Go to next step 

5. CHECK FOR DTC (MASTER SWITCH)* 
   1. Clear the DTCs. Refer to DTC CHECK / CLEAR .
   2. Recheck for DTCs.

      Result

      Result	Proceed to
      DTC B2312 is not output	A
      DTC B2312 is output	B

      B → GO TO POWER WINDOW CONTROL SYSTEM. Refer to  DTC B2312: Power Window Switch Malfunction 

      A: Go to next step 

6. CHECK FOR DTC (MAIN BODY ECU)* 
   1. Clear the DTCs. Refer to DTC CHECK / CLEAR .
   2. Recheck for DTCs.

      Result

      Result	Proceed to
      DTC is not output	A
      DTC is output	B

      B → GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART  

      A: Go to next step 

7. PROBLEM SYMPTOMS TABLE 
   1. Refer to Problem Symptoms Table. Refer to PROBLEM SYMPTOMS TABLE .

      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   9 

      A: Go to next step 

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

      NEXT: Go to next step 

9. REPAIR OR REPLACE 

   NEXT: Go to next step 

10. CONFIRMATION TEST 

    NEXT → END