DTC C1A46: Yaw Rate Sensor [11/2015 - 12/2018]: Procedure

HINT: 

Pre-collision system DTC C1A46 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. Drive the vehicle at a speed of 5 km/h (4 mph) or more for 10 seconds or more.
2. Check for DTCs.

   Body Electrical > Pre-Collision 2 > Trouble Codes 

   Result

   Result	Proceed to
   C1A46 is not output	A
   C1A46 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. Drive the vehicle at a speed of 5 km/h (4 mph) or more for 10 seconds or more.
2. Check for DTCs.

   Body Electrical > Pre-Collision 2 > Trouble Codes 

   Result

   Result	Proceed to
   C1A46 is not output	A
   C1A46 is output	B

Result: 

A 

END (DRIVING SUPPORT ECU ASSEMBLY WAS DEFECTIVE) 

Result: 

B 

See step  7

1. Replace the yaw rate sensor (airbag ECU assembly).

   HINT: 

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

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  8

1. Clear the DTCs.

   Body Electrical > Pre-Collision 2 > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  9

1. Perform the following procedure.

   HINT: 

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

   1. Drive the vehicle at a speed of 5 km/h (4 mph) or more for 10 seconds or more.
2. Check for DTCs.

   Body Electrical > Pre-Collision 2 > Trouble Codes 

   Result

   Result	Proceed to
   C1A46 is not output	A
   C1A46 is output	B

Result: 

A 

END (YAW RATE SENSOR WAS DEFECTIVE) 

Result: 

B 

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