DTC C120A: ECU Initial Setting Incomplete [08/2015 - ]: Procedure

1. Perform calibration (Refer to CALIBRATION [08/2015 - 08/2019] , or refer to CALIBRATION [08/2019 - ] ).
   NOTE:

   If a DTC is output after replacing the master cylinder solenoid, it is possible that calibration has not been performed or the zero point calibration data was not cleared when calibration was performed.

Result: 

NEXT 

See step  2

1. Check for DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] , or refer to DTC CHECK / CLEAR [08/2019 - ] ).
   RESULT
   
   

   Result	Proceed to
   DTC C120A is output	A
   DTC C120A is not output	B

Result: 

B 

END 

Result: 

A 

See step  3

1. Switch the vehicle to test mode, perform the downhill assist control switch or crawl switch signal check, and then check that DTC C1379 is cleared (Refer to TEST MODE PROCEDURE [08/2015 - 08/2019] , or refer to TEST MODE PROCEDURE [08/2019 - ] ).
   RESULT
   
   

   Result	Proceed to
   DTC is not cleared	A
   DTC is cleared	B

Result: 

A 

GO TO DTC C1379 

(Refer to DTC C1379: Downhill Assist Control Switch Malfunction (Test Mode DTC) [08/2015 - 08/2019] , or refer to DTC C1379: Downhill Assist Control Switch Malfunction (Test Mode DTC) [08/2019 - ] )

Result: 

B 

USE SIMULATION METHOD TO CHECK 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 08/2019] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - ] )