How To Proceed With Troubleshooting

HINT:

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

1. VEHICLE BROUGHT TO WORKSHOP 
2. INSPECT BATTERY VOLTAGE 

   Standard voltage: 

   11 to 14 V 

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

3. INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* 
   1. Use the intelligent tester or Techstream to check that the CAN communication system is functioning normally

   Result 

   RESULT REFERENCE
   
   

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

   B: Go to CAN COMMUNICATION SYSTEM  (see HOW TO PROCEED WITH TROUBLESHOOTING )

   A: Go to Next Step 

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

   Result 

   RESULT REFERENCE
   
   

   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 (see PROBLEM SYMPTOMS TABLE )
   2. Data List / Active Test (see DATA LIST / ACTIVE TEST )
   3. On-vehicle Inspection (see ON-VEHICLE INSPECTION )
   4. Inspection
6. REPAIR OR REPLACE 
7. CONFIRMATION TEST 

   NEXT: END