Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001HET8
Model Year Start: 2020 Model: GR Corolla Prod Date Range: [01/2019 - 09/2019]
Title: POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model (for Hatchback)): C1541; Vehicle Speed Signal; 2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2019]

DTC

C1541

Vehicle Speed Signal

DESCRIPTION

The power steering ECU with motor assembly receives vehicle speed signals from the skid control ECU (brake actuator assembly) via CAN communication. The ECU provides appropriate assist force in accordance with the vehicle speed based on the signals.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Return-to-normal Condition

Note

C1541

Vehicle Speed Signal

Vehicle speed signals via CAN communication are cut off for 3 seconds or more.
  • Brake control system
  • CAN communication system
  • Power steering ECU with motor assembly

EPS warning light: Comes on

The ECU judges the system has returned to normal or the engine switch is turned on (IG) again

-

CAUTION / NOTICE / HINT

NOTICE:

If the power steering ECU with motor assembly has been replaced, perform assist map writing and torque sensor zero point calibration.

Click here 2019 - 2020 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2019]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model (for Hatchback)): CALIBRATION

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Check if DTC U0129 is output.

Click here 2019 - 2020 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2019]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model (for Hatchback)): DTC CHECK / CLEAR

Result

Proceed to

DTC U0129 is not output.

A

DTC U0129 is output.

B
B

GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

A

2.

CHECK BRAKE CONTROL SYSTEM

(a) Using the Techstream, check for DTCs and confirm that there are no malfunctions in the brake control system.

w/ Electric Parking Brake System: Click here 2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System): DTC CHECK / CLEAR

w/o Electric Parking Brake System: Click here 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model without Electric Parking Brake System): DTC CHECK / CLEAR

Chassis > Brake/EPB > Trouble Codes

Result

Proceed to

DTCs are not output.

A

DTCs are output.

B
A

REPLACE POWER STEERING ECU WITH MOTOR ASSEMBLY 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; POWER ASSIST SYSTEMS: POWER STEERING ECU: REMOVAL 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2019]; POWER ASSIST SYSTEMS: POWER STEERING ECU: REMOVAL

B

GO TO BRAKE CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART)

w/ Electric Parking Brake System: Click here 2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 03/2019]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System): DIAGNOSTIC TROUBLE CODE CHART 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [03/2019 - 09/2022]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System): DIAGNOSTIC TROUBLE CODE CHART

w/o Electric Parking Brake System: Click here 2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 03/2019]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model without Electric Parking Brake System): DIAGNOSTIC TROUBLE CODE CHART 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [03/2019 - 09/2022]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model without Electric Parking Brake System): DIAGNOSTIC TROUBLE CODE CHART