How To Proceed With Troubleshooting

HINT:

• Use this procedure to troubleshoot the smart key system.
• The hand-held tester should be used in steps 3 and 5.

1. VEHICLE BROUGHT TO WORKSHOP 
2. CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK (See  CUSTOMER PROBLEM ANALYSIS CHECK   ) 
3. INSPECT COMMUNICATION FUNCTION OF LARGE-SCALE MULTIPLEX COMMUNICATION SYSTEM (BEAN) 
   1. Use the hand-held tester to check for normal function of the multiplex communication system.
   1. (ECU not connected, communication line malfunctioning) Without code outputs, proceed to A.
   2. (ECU not connected, communication line malfunctioning) With code outputs, proceed to B.

   B: Go to MULTIPLEX COMMUNICATION SECTION (See  DIAGNOSTIC TROUBLE CODE CHART  ) 

   A: GO TO NEXT STEP 

4. CHECK FOR DTCS (See  DTC CHECK/CLEAR   ) 
   1. Check for DTCs and note any codes that are output.
   2. Delete the DTC.
   3. Recheck for DTCs. Try to prompt the DTC by simulating the original activity that the DTC suggests.
   1. If the DTC does not reoccur, proceed to A.
   2. If the DTC reoccurs, proceed to B.

   B: Go to step   6 

   A: GO TO NEXT STEP 

5. (See  PROBLEM SYMPTOMS TABLE   ) 
   1. If the fault is not listed on the problem symptoms table, proceed to A.
   2. If the fault is listed on the problem symptoms table, proceed to B.

   B: Go to step   7 

   A: GO TO NEXT STEP 

6. OVERALL ANALYSIS AND TROUBLE SHOOTING 
   1. (see DATA LIST/ACTIVE TEST  )
      1. Inspection with the hand-held tester (DATA LIST)
      2. Inspection with the hand-held tester (ACTIVE TEST)
   2. (see TERMINALS OF ECU  )
   3. (see ON-VEHICLE INSPECTION  )
   4. (see INSPECTION  )
7. ADJUST, REPAIR OR REPLACE 
8. CONFIRMATION TEST 

   END