DTC C1A64: Brake Control Signal Mismatch [11/2015 - 12/2018]: Procedure

HINT: 

Pre-collision system DTC C1A64 may be stored due to a malfunction in the electronically controlled brake system. Therefore, it is necessary to check for and troubleshoot electronically controlled brake system DTCs first.

1. Check for DTCs.

   Chassis > ABS/VSC/TRAC > Trouble Codes 

   Result

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

Result: 

B 

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2015 - 12/2018] 

Result: 

A 

See step  2

1. Clear the DTCs.

   Body Electrical > Pre-Collision 2 > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  3

1. Perform the following procedure.

   HINT: 

   If the following procedure is not performed, the previously output DTC cannot be detected.

   1. Turn the power switch on (IG) and wait 0.5 seconds or more.
2. Check for DTCs.

   Body Electrical > Pre-Collision 2 > Trouble Codes 

   Result

   Result	Proceed to
   C1A64 is not output	A
   C1A64 is output	B

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2015 - 12/2018] 

Result: 

B 

See step  4

1. Replace the driving support ECU assembly.

   HINT: 

   Refer to REMOVAL [11/2015 - 12/2018]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5

1. Clear the DTCs.

   Body Electrical > Pre-Collision 2 > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  6

1. Perform the following procedure.

   HINT: 

   If the following procedure is not performed, the previously output DTC cannot be detected.

   1. Turn the power switch on (IG) and wait 0.5 seconds or more.
2. Check for DTCs.

   Body Electrical > Pre-Collision 2 > Trouble Codes 

   Result

   Result	Proceed to
   C1A64 is not output	A
   C1A64 is output	B

Result: 

A 

END (DRIVING SUPPORT ECU ASSEMBLY WAS DEFECTIVE) 

Result: 

B 

REPLACE SKID CONTROL ECU (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY). Refer to  COMPONENTS [11/2015 - ]