How To Proceed With Troubleshooting

HINT:

• Use these procedures to troubleshoot the seat belt warning system.
• *: Use the intelligent tester.

1. VEHICLE BROUGHT TO WORKSHOP 
2. INSPECT BATTERY VOLTAGE 

   Standard voltage: 

   11 to 14 V 

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

3. CHECK COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM (BEAN)* 
   1. Use the intelligent tester to check if the Multiplex Communication System (MPX) is functioning normally.

      Result: 

      DTC RESULT CHART
      
      

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

   B: GO TO  MULTIPLEX COMMUNICATION 

   A: Go to next step 

4. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM (CAN)* 
   1. Use the intelligent tester to check if the CAN Communication System (CAN) is functioning normally.

      Result: 

      DTC RESULT CHART
      
      

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

   B: GO TO  CAN COMMUNICATION 

   A: Go to next step 

5. PROBLEM SYMPTOMS TABLE 

   HINT:

   See PROBLEM SYMPTOMS TABLE 

6. OVERALL ANALYSIS AND TROUBLESHOOTING* 
   1. DATA LIST / ACTIVE TEST (See DATA LIST / ACTIVE TEST  )
   2. Terminals of ECU (See TERMINALS OF ECU  )
   3. On-vehicle Inspection (See DATA LIST / ACTIVE TEST  )
7. REPAIR OR REPLACE 
8. CONFIRMATION TEST 

   NEXT: END