How To Proceed With Troubleshooting

HINT:

• Use these procedures to troubleshoot the lighting 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. CHECK COMMUNICATION FUNCTION OF COMMUNICATION SYSTEM* 
   1. Check for DTCs and make a note of any codes that are output (see DIAGNOSTIC TROUBLE CODE CHART  ).
   2. Clear the DTC
   3. Recheck for DTCs Based on the DTCs output above, try to cause the output of the same CAN communication system DTC, LIN communication DTC or lighting system DTC by simulating the symptoms indicated by the DTC.

      Result: 

      RESULT CHART
      
      

      Result	Proceed to
      DTC output does not reoccur	A
      CAN communication system DTC output reoccurs	B
      LIN communication system DTC output reoccurs	C
      Lighting system DTC output reoccurs	D

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

   C: Go to LIN COMMUNICATION SYSTEM  (See DIAGNOSTIC TROUBLE CODE CHART )

   D: Go to DIAGNOSTIC TROUBLE CODE CHART  (See DIAGNOSTIC TROUBLE CODE CHART  )

   A: Go to next step 

4. PROBLEM SYMPTOMS TABLE 

   Result: 

   RESULT 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. Operation Check (see OPERATION CHECK  )
   2. Terminals of ECU (see TERMINALS OF ECU  ).
   3. Data List / Active Test (see DATA LIST / ACTIVE TEST  ).
6. ADJUST, REPAIR OR REPLACE 
7. CONFIRMATION TEST 

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