Toyota Corolla Cross: 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.
CAUTION / NOTICE / HINT
NOTICE:
When the power steering ECU assembly has been replaced, perform Power Steering ECU Initial Setting (assist map writing).
Click here .gif)
PROCEDURE
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1. |
CHECK VEHICLE CONTROL HISTORY (POWER STEERING SYSTEM) |
(a) Enter the following menus: Chassis / EMPS / Utility / Vehicle Control History (RoB).
Chassis > EMPS > Utility|
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 |
A |
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Vehicle control history stored for power steering ECU assembly |
B |
| B | .gif) |
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 GTS.
Body Electrical > Combination Meter > Active Test|
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 GTS operation.
| OK | |
REPLACE POWER STEERING ECU ASSEMBLY |
| NG | |
GO TO METER / GAUGE SYSTEM |
READ NEXT:
Abnormal Feel at Steering End Position
SYSTEM DESCRIPTION
This vehicle employs end position contact shock reduction control for column
EPS, designed to protect components by suppressing torque input when steering mechanism
components
SEE MORE:
Dtc Check / Clear
DTC CHECK / CLEAR DTC CHECK (a) Check for DTCs (Test Failed / Pending / Confirmed). Body Electrical > SRS Airbag > Trouble Codes
GTS Display Description
Test Failed Shows the malfunction judgment results during the current trip.
Pending Shows the malfunction judgmen
On-vehicle Inspection
ON-VEHICLE INSPECTION CAUTION / NOTICE / HINT
HINT:
Steps 2 to 9 specify the procedure to determine the cause of a refrigerant leak.
Step 10 specifies the procedure to check if there is a clog in the expansion valve.
PROCEDURE 1. INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET
