How To Proceed With Troubleshooting

HINT:

• Use these procedures to troubleshoot the clearance sonar system.
• *: Use the intelligent tester.

1. VEHICLE BROUGHT TO WORKSHOP 
2. CUSTOMER PROBLEM ANALYSIS 

   Refer to how to proceed with troubleshooting (See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS ).

3. CHECK AND CLEAR DTC* 

   Refer to the DTC check/clear (see DTC CHECK/CLEAR  ).

4. CHECK INITIAL CHECK FUNCTION 

   Refer to operation check (see OPERATION CHECK  ).

   Result 

   RESULT DESCRIPTION TABLE
   
   

   Result	Proceed to
   Symptom does not occur	A
   Symptom occurs	B

   B: Go to step   6 

   A: Go to next step. 

5. SYMPTOM SIMULATION 

   Refer to how to proceed with troubleshooting (See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS ).

6. CHECK MULTIPLEX COMMUNICATION SYSTEM* 

   Refer to how to proceed with troubleshooting (see HOW TO PROCEED WITH TROUBLESHOOTING ).

   HINT:

   This ECU is connected to the multiplex communication system. Therefore, be sure to check that there are no problems in the multiplex communication system before performing troubleshooting.

7. CHECK CAN COMMUNICATION SYSTEM* 

   Refer to how to proceed with troubleshooting (see HOW TO PROCEED WITH TROUBLESHOOTING ).

   HINT:

   This ECU is connected to the CAN communication system. Therefore, be sure to check that there are no problems in the CAN communication system before performing troubleshooting.

8. DTC CHECK* 

   *: Refer to the DTC check/clear (see DTC CHECK/CLEAR  ).

   Result 

   RESULT DESCRIPTION TABLE
   
   

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

   B: Go to step   10 

   A: Go to next step. 

9. DTC TABLE 

   Refer to the diagnostic trouble code table (see DIAGNOSTIC TROUBLE CODE TABLE  ).

   Go to step   11 

10. PROBLEM SYMPTOMS TABLE 

    Refer to the problem symptoms table (see PROBLEM SYMPTOMS TABLE  ).

11. CIRCUIT INSPECTION 
12. IDENTIFICATION OF PROBLEM 
13. REPAIR OR REPLACE 
14. CONFIRMATION TEST 

    END