How To Proceed With Troubleshooting [02/2024 - ]: Procedure

Result

Result: 

NEXT 

See step  2

1. Interview the customer and confirm the problem.

   Refer to HOW TO PROCEED WITH TROUBLESHOOTING [02/2024 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  3

1. Check and record DTCs and Freeze Frame Data.

   Chassis > Trailer Brake Controller > Trouble Codes 

2. Clear the DTCs and Freeze Frame Data.

   Chassis > Trailer Brake Controller > Clear DTCs 

3. Reconfirm the DTCs.
   1. Reconfirm the DTCs based on the recorded DTCs.

      Chassis > Trailer Brake Controller > Trouble Codes 

      HINT: 

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

        Refer to HOW TO PROCEED WITH TROUBLESHOOTING [02/2024 - ]

      • If the GTS cannot communicate with the trailer brake control ECU (brake control with bracket relay), inspect the CAN communication system.

        Refer to HOW TO PROCEED WITH TROUBLESHOOTING [02/2024 - ]

      • If there is no response from the trailer brake control ECU (brake control with bracket relay), inspect the supply power circuit.

        Refer to TERMINALS OF ECU [02/2024 - ] 

4. Check the Vehicle Control History (RoB).

   Refer to VEHICLE CONTROL HISTORY (RoB) [02/2024 - ]

   Result

   Result	Proceed to
   DTC is output	A
   DTC is not output (Vehicle control history (RoB) is not stored)	B
   DTCs is not output. (Vehicle control history (RoB) is stored)	C

Result: 

A 

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS* 

Result: 

B 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [02/2024 - ] 

Result: 

C 

PERFORM TROUBLESHOOTING AND REPAIR REGARDING VEHICLE CONTROL HISTORY (RoB)* 

Refer to VEHICLE CONTROL HISTORY (RoB) [02/2024 - ]