How To Proceed With Troubleshooting

HINT:

• Use these procedures to troubleshoot the LIN communication 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 FOR DTC (ELECTRICAL POWER CONTROL SYSTEM)* 
   1. Using the intelligent tester or Techstream, check if the electric power control system is functioning normally.

      Result: 

      FOR DTC (ELECTRICAL POWER CONTROL SYSTEM)
      
      

      Result	Proceed to
      DTC B22B3 is not output	A
      DTC B22B3 is output	B

   B: GO TO ELECTRIC POWER CONTROL SYSTEM  (See DIAGNOSTIC TROUBLE CODE CHART )

   A: GO TO NEXT STEP 

4. INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* 
   1. Using the intelligent tester or Techstream, inspect the CAN communication function to ensure there are no malfunctions in the communication system (see CAN COMMUNICATION SYSTEM ).

      Result: 

      COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM
      
      

      Result	Proceed to
      No DTCs output	A
      DTCs output	B

   B: GO TO  CAN COMMUNICATION SYSTEM 

   A: GO TO NEXT STEP 

5. INSPECT COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM* 
   1. Using the intelligent tester or Techstream, inspect the LIN communication function to ensure there are no malfunctions in the communication system.

      Result: 

      COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM
      
      

      Result	Proceed to
      No DTCs output	A
      DTCs output	B

   B: DIAGNOSTIC TROUBLE CODE CHART (See  DIAGNOSTIC TROUBLE CODE CHART   ) 

   A: GO TO NEXT STEP 

6. PROBLEM SYMPTOMS TABLE 

   Result: 

   PROBLEM SYMPTOMS
   
   

   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. DATA LIST/ACTIVE TEST (see DATA LIST / ACTIVE TEST  )
   2. Terminals of ECU (see TERMINALS OF ECU  )
8. ADJUST, REPAIR OR REPLACE 

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