| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM10000000257CF |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [09/2022 - ] |
| Title: POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model): EPS Warning Light Circuit; 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [09/2022 - ] | ||
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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 assembly controls the warning light in the combination meter assembly via CAN communication.
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
![2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model): VEHICLE CONTROL HISTORY](/t3Portal/stylegraphics/info.gif)
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 assembly (for Multi-information Display (4.2 Inch Display)) |
A |
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Vehicle control history not stored for power steering ECU assembly (for Multi-information Display (7 Inch Display) or Multi-information Display (12.3 Inch Display) |
B |
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Vehicle control history stored for power steering ECU assembly |
C |
| B |
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| C |
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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. |
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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 |
|---|
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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 ASSEMBLY
|
| NG |
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GO TO METER / GAUGE SYSTEM
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|
3. |
INSPECT COMBINATION METER ASSEMBLY |
(a) Perform the Active Test of the combination meter assembly using the Techstream.
except 12.3 inch Display: Click here
12.3 inch Display: 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 ASSEMBLY
|
| NG |
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GO TO METER / GAUGE SYSTEM except 12.3 inch Display: Click here
12.3 inch Display: Click here
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