How To Proceed With Troubleshooting [12/2019 - 11/2023]: Procedure

Result

Result: 

NEXT 

See step  2

1. Interview the customer and confirm the problem.

   Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  3

1. Check and record DTCs and Freeze Frame Data.

   for DTC Check / Clear: Refer to DTC CHECK / CLEAR [12/2019 - ] 

   for Freeze Frame Data: Refer to FREEZE FRAME DATA [12/2019 - 11/2023] 

   Chassis > Brake Booster > Trouble Codes 

   Chassis > Brake/EPB > Trouble Codes 

2. Clear the DTCs and Freeze Frame Data.

   for DTC Check / Clear: Refer to DTC CHECK / CLEAR [12/2019 - ] 

   for Freeze Frame Data: Refer to FREEZE FRAME DATA [12/2019 - 11/2023] 

   Chassis > Brake Booster > Clear DTCs 

   Chassis > Brake/EPB > Clear DTCs 

3. Reconfirm the DTCs.
   1. Reconfirm the DTCs based on the recorded DTCs and Freeze Frame Data.

      for DTC Check / Clear: Refer to DTC CHECK / CLEAR [12/2019 - ] 

      for Freeze Frame Data: Refer to FREEZE FRAME DATA [12/2019 - 11/2023] 

      Chassis > Brake Booster > Trouble Codes 

      Chassis > Brake/EPB > Trouble Codes 

      HINT: 

      • When CAN communication system DTCs are output, repair the CAN communication system first.

        Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 10/2021] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2021 - 10/2022] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 11/2023]

      • If DTCs related to momentary interruptions are output, perform troubleshooting for those DTCs first.

        Refer to DATA LIST / ACTIVE TEST [12/2019 - 11/2023] 

      • If the GTS cannot communicate with the skid control ECU, inspect the CAN communication system.

        Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 10/2021] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2021 - 10/2022] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 11/2023]

      • If there is no response from the No. 1 skid control ECU (brake booster with master cylinder assembly) or No. 2 skid control ECU (brake actuator assembly), inspect the supply power circuit.

        Refer to TERMINALS OF ECU [12/2019 - ] 

4. Check the Vehicle Control History.

   Refer to VEHICLE CONTROL HISTORY [12/2019 - 11/2023]

   Chassis > Brake Booster > Utility 

   Tester Display
   Vehicle Control History (RoB)

   Chassis > Brake/EPB > Utility 

   Tester Display
   Vehicle Control History (RoB)

   Result

   Result	Proceed to
   DTCs are not output. (Problem symptom occurs.)	A
   DTCs are output.	B
   DTCs are not output. (Problem symptom does not occur.)	C
   DTCs are not output. (Vehicle control history is stored.)	D

Result: 

A 

CONFIRM PROBLEM SYMPTOMS. Refer to  PROBLEM SYMPTOMS TABLE [12/2019 - 10/2022]  , or refer to  PROBLEM SYMPTOMS TABLE [10/2022 - ]  

Result: 

B 

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS*. Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2019 - 10/2021]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2021 - 11/2023] 

Result: 

C 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ] 

Result: 

D 

PERFORM TROUBLESHOOTING AND REPAIR REGARDING VEHICLE CONTROL HISTORY* 

Refer to VEHICLE CONTROL HISTORY [12/2019 - 11/2023]