| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001H79V |
| 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 Sedan)): EPS Warning Light Circuit; 2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2019] | ||
|
EPS Warning Light Circuit |
DESCRIPTION
Use the following procedure if no DTCs are output but the EPS warning light is illuminated continuously.
The power steering ECU with motor assembly controls the warning light in the combination meter assembly via CAN communication.
CAUTION / NOTICE / HINT
NOTICE:
When the power steering ECU with motor assembly has been replaced, perform Power Steering ECUInitial Setting (torque sensor zero point calibration and assist map writing).
Click here
![2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2019]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model (for Sedan)): CALIBRATION](/t3Portal/stylegraphics/info.gif)
PROCEDURE
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1. |
CHECK VEHICLE CONTROL HISTORY (POWER STEERING SYSTEM) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Enter the following menus: Chassis / EMPS / Utility / Vehicle Control History (RoB).
(d) Using the Techstream, check for Vehicle Control History.
Click here
Chassis > EMPS > Utility
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Tester Display |
|---|
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Vehicle Control History (RoB) |
HINT:
The EPS warning light illuminates if any vehicle control history is stored.
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Result |
Proceed to |
|---|---|
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Vehicle control history not stored for power steering ECU with motor assembly (for Multi-information Display (4.2 Inch Display)) |
A |
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Vehicle control history not stored for power steering ECU with motor assembly (for Multi-information Display (7 Inch Display)) |
B |
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Vehicle control history stored for power steering ECU with motor assembly |
C |
| B |
|
| C |
|
PERFORM TROUBLESHOOTING AND REPAIR REGARDING VEHICLE CONTROL HISTORY Click here
NOTICE: After performing troubleshooting and repair regarding vehicle control history, clear the vehicle control history. |
|
|
2. |
INSPECT COMBINATION METER ASSEMBLY |
(a) Perform the Active Test of the combination meter assembly using the Techstream.
Click here
Body Electrical > Combination Meter > Active Test
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Tester Display |
|---|
|
EPS Warning |
(b) Check the combination meter assembly.
OK:
The EPS warning light turns on or off in accordance with the Techstream operation.
| OK |
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REPLACE POWER STEERING ECU WITH MOTOR ASSEMBLY
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| NG |
|
|
3. |
INSPECT COMBINATION METER ASSEMBLY |
(a) Perform the Active Test of the combination meter assembly using the Techstream.
Click here
Body Electrical > Combination Meter > Active Test
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Tester Display |
|---|
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Multi Display All (White) |
(b) Check the combination meter assembly.
OK:
The multi-information display in the combination meter assembly turns on according to the operation of the Active Test.
| OK |
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REPLACE POWER STEERING ECU WITH MOTOR ASSEMBLY
|
| NG |
|
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