How To Proceed With Troubleshooting

HINT:

• Use these procedures to troubleshoot the window defogger system.
• *: Use the 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. CHECK VEHICLE TYPE 
   1. Check the vehicle type.

      Result 

      DTC RESULT REFERENCE
      
      

      Result	Proceed To
      w/o Multi-display	A
      w/Multi-display	B

   B:  Go to step  5

   A: Go to Next Step 

4. CHECK LIN COMMUNICATION SYSTEM 
   1. Check if the LIN communication system is functioning normally (See HOW TO PROCEED WITH TROUBLESHOOTING ).

      OK: LIN DTC is not output. 

   NG: Go to LIN COMMUNICATION SYSTEM  (See HOW TO PROCEED WITH TROUBLESHOOTING )

   OK:  Go to step  6

5. CHECK CAN COMMUNICATION SYSTEM 
   1. Check if the CAN communication system is functioning normally (See CAN COMMUNICATION SYSTEM ).

      OK: CAN DTC is not output. 

   NG: Go to CAN COMMUNICATION SYSTEM  (See CAN COMMUNICATION SYSTEM )

   OK: Go to Next Step 

6. PROBLEM SYMPTOMS TABLE 
   1. Refer to the Problem Symptoms Table (See PROBLEM SYMPTOMS TABLE  ).

      Result 

      DTC 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  8

   A: Go to Next Step 

7. OVERALL ANALYSIS AND TROUBLESHOOTING* 
   1. Terminals of ECU (See TERMINALS OF ECU  )
   2. Data List/Active Test (See DATA LIST/ACTIVE TEST  )
8. REPAIR OR REPLACE 
9. CONFIRMATION TEST 

   NEXT: END