DTC C1A71: Power Steering Control Torque [10/2015 - ]: Procedure

HINT: 

Lane departure alert system DTC C1A71 may be stored due to a malfunction in the power steering system. Therefore it is necessary to check for and troubleshoot power steering system DTCs first.

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Chassis / EMPS / Trouble Codes.
5. Check for DTCs are output.

   Refer to DTC CHECK / CLEAR [10/2015 - ]

   Result

   Result	Proceed to
   Power steering system DTCs are not output	A
   Power steering system DTCs are output	B

Result: 

B 

GO TO POWER STEERING SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ] 

Result: 

A 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Chassis / LKA/LDA / Trouble Codes.
5. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [10/2015 - ]

6. 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 7 seconds or more.
7. Check for DTCs.

   Refer to DTC CHECK / CLEAR [10/2015 - ]

   Result

   Result	Proceed to
   DTC C1A71 is not output	A
   DTC C1A71 is output	B

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ] 

Result: 

B 

See step  3

1. Replace the forward recognition camera.

   Refer to REMOVAL [10/2015 - ]

2. Perform Forward Recognition Camera Learning.

   Refer to ADJUSTMENT [10/2015 - ]

Result: 

NEXT 

See step  4

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Chassis / LKA/LDA / Trouble Codes.
5. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [10/2015 - ]

6. 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 7 seconds or more.
7. Check for DTCs.

   Refer to DTC CHECK / CLEAR [10/2015 - ]

   Result

   Result	Proceed to
   DTC C1A71 is not output	A
   DTC C1A71 is output	B

Result: 

A 

END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE) 

Result: 

B 

REPLACE POWER STEERING ECU ASSEMBLY. Refer to  COMPONENTS [10/2014 - ]