How To Proceed With Troubleshooting

HINT:

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

1. VEHICLE BROUGHT TO WORKSHOP 

   NEXT 

2. INSPECT BATTERY VOLTAGE 

   Standard voltage: 

   11 to 14 V 

   If the voltage is below 11 V, recharge or replace the battery before proceeding.

   NEXT 

3. INSPECT COMMUNICATION FUNCTION OF LARGE-SCALE MULTIPLEX COMMUNICATION SYSTEM (BEAN)* 
   1. Use the intelligent tester to check that the Multiplex Communication System (MPX) is functioning normally.

      Result 

      RESULT PROCEDURE CHART
      
      

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

   B : Go to MULTIPLEX COMMUNICATION SYSTEM 

   A : GO TO NEXT STEP 

4. PROBLEM SYMPTOMS TABLE 

   Result 

   RESULT PROCEDURE CHART
   
   

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

   B : Go to step   6 

   A : GO TO NEXT STEP 

5. OVERALL ANALYSIS AND TROUBLESHOOTING* 
   1. TERMINALS OF ECU 
   2. DATA LIST / ACTIVE TEST 
   3. ON-VEHICLE INSPECTION 
   4. Inspection

   NEXT 

6. REPAIR OR REPLACE 

   NEXT 

7. CONFIRMATION TEST 

   NEXT 

   END