How To Proceed With Troubleshooting [12/2021 - ]: 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.

   HINT: 

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

   Standard Voltage

   11 to 14 V (Ignition switch off)

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 Techstream, check if the CAN communication system is functioning normally.

   for Gasoline Model: Refer to DIAGNOSIS SYSTEM [12/2021 - 10/2022] , or refer to DIAGNOSIS SYSTEM [10/2022 - 10/2023] , or refer to DIAGNOSIS SYSTEM [10/2023 - 11/2024] , or refer to DIAGNOSIS SYSTEM [11/2024 - ]

   for HV Model: Refer to DIAGNOSIS SYSTEM [12/2021 - 10/2022] , or refer to DIAGNOSIS SYSTEM [10/2022 - 10/2023] , or refer to DIAGNOSIS SYSTEM [10/2023 - 11/2024] , or refer to DIAGNOSIS SYSTEM [11/2024 - ]

   HINT: 

   Refer to CAN Bus Check in CAN Communication System.

   OK

   CAN communication system is functioning normally.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO CAN COMMUNICATION SYSTEM 

for Gasoline Model: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ]

for HV Model: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [02/2019 - ]

Result: 

OK 

See step  5

1. Using the Techstream, Check for DTCs.

   Chassis > Lane Control > Trouble Codes 

2. Make a note of the output DTCs.

   Result

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

Result: 

B 

See step  8

Result: 

A 

See step  6

1. Using the Techstream, check for vehicle control history (RoB).

   Chassis > Lane Control > Utility 

   Tester Display
   Vehicle Control History (RoB)

2. Make a note of the output vehicle control history (RoB).

   Result

   Result	Proceed to
   Vehicle control history (RoB) is not output	A
   Vehicle control history (RoB) is output	B

Result: 

A 

GO TO SYMPTOM SIMULATION 

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ]

Result: 

B 

See step  7

1. Using the Techstream, Clear the DTCs.

   Chassis > Lane Control > Clear DTCs 

2. Reproduce the vehicle conditions that were present when the DTCs that were noted were stored.

   HINT: 

   Refer to each corresponding DTC for details on the detection conditions.

   Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2021 - 10/2022] , or refer to DIAGNOSTIC TROUBLE CODE CHART [10/2022 - ] 

3. Using the Techstream, check for DTCs.
   1. Attempt to duplicate the malfunction and check if the DTCs are output again.

      Refer to DTC CHECK / CLEAR [12/2021 - ] 

      Chassis > Lane Control > Trouble Codes 

   Result

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

Result: 

A 

See step  6

Result: 

B 

GO TO  DIAGNOSTIC TROUBLE CODE CHART [11/2018 - 12/2021]  , or  DIAGNOSTIC TROUBLE CODE CHART [12/2021 - 10/2022]  

1. Using the Techstream, clear the vehicle control history (RoB).

   Chassis > Lane Control > Utility 

   Tester Display
   Vehicle Control History (RoB)

2. Using the Techstream, check for vehicle control history (RoB).

   Chassis > Lane Control > Utility 

   Tester Display
   Vehicle Control History (RoB)

   Result

   Result	Proceed to
   Vehicle control history (RoB) is not output	A
   Vehicle control history (RoB) is output	B

Result: 

A 

GO TO SYMPTOM SIMULATION 

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ]

Result: 

B 

GO TO VEHICLE CONTROL HISTORY 

Refer to VEHICLE CONTROL HISTORY [12/2021 - 10/2022] , or refer to VEHICLE CONTROL HISTORY [10/2022 - ]