How To Proceed With Troubleshooting

HINT:

• User the following 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 to the next step.

3. CHECK FOR DTC* 
   1. Check for DTCs and make a note of any codes that are output.
   2. Clear the DTC.
   3. Recheck for DTCs. Based on the DTCs output above, try to cause the output of the same multiplex communication system DTC or airbag system DTC by simulating the symptoms indicated by the DTC.

      Result: 

      RESULT REFERENCE
      
      

      Result	Proceed to
      DTC output does not reoccur	A
      Multiplex communication system DTC output reoccurs	B
      Airbag system DTC output reoccurs	C

   B: Go to MULTIPLEX COMMUNICATION SYSTEM (See  DTC CHECK / CLEAR  ) 

   C: Go to AIRBAG SYSTEM (See  DATA LIST / ACTIVE TEST  ) 

   A: Go to next step 

4. PROBLEM SYMPTOMS TABLE 
   1. Refer to PROBLEM SYMPTOMS TABLE  .
5. OVERALL ANALYSIS AND TROUBLESHOOTING* 
   1. (see OPERATION CHECK  )
   2. (see DATA LIST / ACTIVE TEST  )
   3. (see TERMINALS OF ECU  )
6. REPAIR OR REPLACE 
7. CONFIRMATION TEST 

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