How To Proceed With Troubleshooting [11/2021 - ]: 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 problem 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 auxiliary battery voltage with the ignition switch off.

   Standard Voltage

   11 to 14 V

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

2. Check the fuses and relays.
3. Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  4

1. Using the GTS, check for CAN communication system DTCs.

   for HEV Model: Refer to DIAGNOSIS SYSTEM [11/2021 - 03/2023] , or refer to DIAGNOSIS SYSTEM [03/2023 - 03/2024] , or refer to DIAGNOSIS SYSTEM [03/2024 - ]

   for Gasoline Model: Refer to DIAGNOSIS SYSTEM [11/2021 - 03/2023] , or refer to DIAGNOSIS SYSTEM [03/2023 - 03/2024] , or refer to DIAGNOSIS SYSTEM [03/2024 - ]

   Result

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

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM 

for HEV Model: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ]

for Gasoline Model: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ]

Result: 

A 

See step  5

1. Using the GTS, check for CXPI communication system DTCs.

   Refer to DIAGNOSTIC TROUBLE CODE CHART [11/2021 - ]

   Result

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

Result: 

B 

GO TO CXPI COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ] 

Result: 

A 

See step  6

1. Check for DTCs.

   Body Electrical > Main Body > Trouble Codes 

   Body Electrical > Headlight Control > Trouble Codes 

   Body Electrical > Headlight Control (Sub) > Trouble Codes 

   Result

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

Result: 

B 

GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2021 - 03/2022]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [03/2022 - ] 

Result: 

A 

See step  7

1. Using the GTS, check for Vehicle Control History (RoB).

   Body Electrical > Headlight Control > Utility 

   Tester Display
   Vehicle Control History (RoB)

   NOTE:

   Make sure to record the output Vehicle Control History (RoB).

   Result

   Result	Proceed to
   Vehicle Control History (RoB) codes are not output	A
   Vehicle Control History (RoB) codes are output	B

Result: 

B 

GO TO VEHICLE CONTROL HISTORY (RoB). Refer to  VEHICLE CONTROL HISTORY (RoB) [11/2021 - ] 

Result: 

A 

See step  8

1. Refer to Problem Symptoms Table.

   Refer to PROBLEM SYMPTOMS TABLE [11/2021 - 03/2022] , or refer to PROBLEM SYMPTOMS TABLE [03/2022 - 03/2024] , or refer to PROBLEM SYMPTOMS TABLE [03/2024 - ]

   Result

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

Result: 

B 

GO TO PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [11/2021 - 03/2022]  , or refer to  PROBLEM SYMPTOMS TABLE [03/2022 - 03/2024]  , or refer to  PROBLEM SYMPTOMS TABLE [03/2024 - ] 

Result: 

A 

See step  9

1. Operation Check.

   Refer to OPERATION CHECK [11/2021 - ] 

2. Terminals of ECU.

   Refer to TERMINALS OF ECU [11/2021 - ]

3. Data List / Active Test.

   Refer to DATA LIST / ACTIVE TEST [11/2021 - ]

4. On-vehicle Inspection.
5. Inspection.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  10

Result

Result: 

NEXT 

See step  11

Result

Result: 

NEXT 

END