How To Troubleshoot

1. Check CAN communication system. (Refer to HOW TO TROUBLESHOOT )
   RESULT DESCRIPTION
   
   

   Result	Go to
   Functioning properly	A
   Not functioning properly	B

   1. Go to next step
   2. To CAN communication system (Refer to HOW TO TROUBLESHOOT )

1. DTC check
   1. Record the diagnostic codes.
2. Clear diagnostic code
3. Do a DTC check again.
   1. Based on the recorded diagnostic codes, reproduce the trouble phenomenon, and check if the diagnostic codes are output again.
      NOTE: When the diagnostic codes are output, see the "List of diagnostic codes" (Refer to LIST OF DIAGNOSTIC CODES ).
      RESULT DESCRIPTION
      
      

      Result	Go to
      No code, can check and reproduce phenomenon	A
      No code, can't check and reproduce phenomenon	B
      Code is output	C

      1. Go to next step
      2. To fault simulation (Refer to MALFUNCTION SYMPTOMS AND DTC CHECK )
      3. See inspection step  7

1. Go to next step
2. See inspection step  7

1. Function inspection (Refer to LIGHTING SYSTEM )
2. ECM terminal arrangement (Refer to ECM TERMINAL ARRANGEMENT )
3. Data monitor/active test (Refer to DATA MONITOR/ACTIVE TEST )
4. Symptom table (Refer to LIST OF DIAGNOSTIC CODES )
5. On-vehicle inspection
6. Unit inspection

Complete