How To Proceed With Troubleshooting [08/2014 - ]

HINT: 

• Use the following procedure to troubleshoot the LEXUS ENFORM system.
• *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP 

   NEXT: Go to next step 

2. CHECK THE CUSTOMER'S CONTRACT STATUS 
   1. Check if the satellite radio and LEXUS ENFORM contracts are valid, or if the contract period has ended using the vehicle inquiry function on TIS.

      Result

      Result	Proceed to
      Both Contracts are valid.	A
      Contract for satellite radio is not valid.	B
      Contract for LEXUS ENFORM is not valid.	C

      B → GO TO NAVIGATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2014 - ] 

      C → GO TO SAFETY CONNECT SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2014 - ] 

      A: Go to next step 

3. CHECK CAN COMMUNICATION SYSTEM* 
   1. Check if CAN communication system DTCs are output. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2014 - ] .

      Result

      Result	Proceed to
      CAN DTCs are not output.	A
      CAN DTCs are output.	B

      B → GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2014 - ] 

      A: Go to next step 

4. CHECK FOR DTC* 
   1. Perform Health Check. Refer to HEALTH CHECK [08/2014 - ] .
   2. Check for DTCs and note any codes that are output.
   3. Clear the DTCs.
   4. Recheck for DTCs. Try to reproduce the DTCs by simulating the conditions indicated by the DTCs.

      Result

      Result	Proceed to
      DTCs are not output.	A
      Navigation system DTCs are output.	B
      Safety connect system DTCs are output.	C
      LEXUS ENFORM system DTCs are output.	D

      B → GO TO NAVIGATION SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2014 - ] 

      C → GO TO SAFETY CONNECT SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2014 - ] 

      D → GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2014 - ]  

      A: Go to next step 

5. PROBLEM SYMPTOMS TABLE 
   1. Refer to Problem Symptoms Table. Refer to PROBLEM SYMPTOMS TABLE [08/2014 - ] .

      Result

      Result	Proceed to
      Fault is not listed in Problem Symptoms Table.	A
      Fault is listed in Problem Symptoms Table.	B

      HINT: 

      If the symptom does not recur and no DTCs are output, perform the simulation method. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2014 - ] .

      B → Go to step 7 

      A: Go to next step 

6. PERFORM TROUBLESHOOTING 
   1. Refer to Terminals of ECU. Refer to TERMINALS OF ECU [08/2014 - ] .

      NEXT: Go to next step 

7. REPAIR OR REPLACE 

   NEXT: Go to next step 

8. CONFIRMATION TEST 

   NEXT: Go to next step 

9. END