DTC C1A71: Power Steering Control Torque [02/2017 - 08/2020]: Procedure

WARNING: This page is about a different car, the 2020 Toyota C-HR, 2019 Toyota C-HR, and 2018 Toyota C-HR. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DTC OUTPUT (POWER STEERING SYSTEM)

Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Enter the following menus: Chassis / EMPS / Trouble Codes.

Check for DTCs.

Refer to DTC CHECK / CLEAR [02/2017 - 10/2017] , or refer to DTC CHECK / CLEAR [10/2017 - 12/2021]

Chassis > EMPS > Trouble Codes

Result

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

Result:

GO TO POWER STEERING SYSTEM. Refer to DIAGNOSTIC TROUBLE CODE CHART [02/2017 - 10/2017] , or refer to DIAGNOSTIC TROUBLE CODE CHART [10/2017 - 12/2021]

Result:

See step 2

CHECK DTC OUTPUT

Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Enter the following menus: Chassis / LKA/LDA / Trouble Codes.
Clear the DTCs.
Refer to DTC CHECK / CLEAR [02/2017 - 08/2020]

Chassis > LKA/LDA > Clear DTCs
Make sure the following conditions are met.
HINT:

If the following procedure is not performed, the previously output DTC cannot be detected.
1. Turn the ignition switch to ON and wait 77 seconds or more.
2. Drive the vehicle at 5 km/h (3 mph) or more.

Check for DTCs.

Refer to DTC CHECK / CLEAR [02/2017 - 08/2020]

Chassis > LKA/LDA > Trouble Codes

Result

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

Result:

USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [02/2017 - 10/2017] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2017 - 05/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [05/2018 - 09/2019] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2019 - 08/2020]

Result:

See step 3

REPLACE FORWARD RECOGNITION CAMERA

Replace the forward recognition camera.
Refer to REMOVAL [02/2017 - 08/2020]

Adjust the forward recognition camera.

Refer to ADJUSTMENT (SEQUENTIAL RECOGNITION) [02/2017 - 08/2020]

Result

Proceed to
NEXT

Result:

See step 4

CHECK DTC OUTPUT

Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Enter the following menus: Chassis / LKA/LDA / Trouble Codes.
Clear the DTCs.
Refer to DTC CHECK / CLEAR [02/2017 - 08/2020]

Chassis > LKA/LDA > Clear DTCs
Make sure the following conditions are met.
HINT:

If the following procedure is not performed, the previously output DTC cannot be detected.
1. Turn the ignition switch to ON and wait 77 seconds or more.
2. Drive the vehicle at 5 km/h (3 mph) or more.

Check for DTCs.

Refer to DTC CHECK / CLEAR [02/2017 - 08/2020]

Chassis > LKA/LDA > Trouble Codes

Result

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

Result:

END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE)

Result:

REPLACE POWER STEERING ECU ASSEMBLY. Refer to REMOVAL [02/2017 - 08/2020]