How To Proceed With Troubleshooting [06/2014 - 09/2020]: Procedure

Result

Result: 

NEXT 

See step  2

HINT: 

• In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
• Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
• The following 5 items are important points for analysis:

  What	Vehicle model, system name
  When	Date, time, occurrence frequency
  Where	Road conditions
  Under what conditions?	Driving conditions, weather conditions
  How did it happen?	Problem symptoms

Result

Result: 

NEXT 

See step  3

1. Measure the battery voltage.

   Standard Voltage

   11 to 14 V

   HINT: 

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

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  4

1. Check if CAN communication system DTCs are output.

   Refer to HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - 10/2016] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2016 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - ]

   Result

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

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - 10/2016]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2016 - 09/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - ] 

Result: 

A 

See step  5

1. Check for DTCs.

   Refer to DTC CHECK / CLEAR [04/2013 - 09/2020]

   Refer to DTC CHECK / CLEAR [04/2013 - 09/2020]

   Body Electrical > Telematics > Trouble Codes 

   Result

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

Result: 

B 

GO TO SAFETY CONNECT SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART [04/2013 - 10/2017]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2017 - 09/2018]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2018 - 09/2020] 

Result: 

C 

GO TO LEXUS ENFORM SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART [04/2013 - 09/2020] 

Result: 

A 

See step  6

1. Refer to Problem Symptoms Table.

   Refer to PROBLEM SYMPTOMS TABLE [06/2014 - 09/2020] 

   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 [06/2014 - 08/2015] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 10/2016] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2016 - 10/2017] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2017 - 09/2020]

Result: 

B 

See step  8

Result: 

A 

See step  7

1. Refer to Terminals of ECU.

   Refer to TERMINALS OF ECU [06/2014 - 10/2017] , or refer to TERMINALS OF ECU [10/2017 - 09/2020] 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  8

Result

Result: 

NEXT 

See step  9

Result

Result: 

NEXT 

END