Toyota Yaris: Power Steering System / Fail-safe Chart
FAIL-SAFE CHART
If a problem occurs in the power steering system, the power steering assist will be stopped or the amount of power assist will be decreased to protect the system.
Power Steering System
Malfunction | Fail-safe Operation | EPS warning light | Buzzer |
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Torque sensor (electric power steering column sub-assembly) malfunction
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Power steering motor (power steering ECU assembly) malfunction
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Power steering ECU assembly malfunction
| Power steering assist stops or assist amount is limited | Red or yellow | Sounds intermittently or once |
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Vehicle speed signal malfunction
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Skid control ECU (brake actuator assembly) malfunction
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Decrease in battery voltage (not malfunction)
| Power steering assist is temporarily limited | Yellow | Sounds once |
HINT:
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If the power steering assist stops, the EPS warning light comes on (red).
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If the amount of power assist is reduced, the EPS warning light comes on (yellow) and a vibration or sound may occur.
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The amount of power assist may be decreased to prevent the motor and ECUs from overheating if the steering wheel is continuously turned when the vehicle is either stopped or being driven at a low speed, or if the steering wheel is kept at either full lock position for a long time. In such cases, the amount of power assist returns to normal when the steering wheel is not turned for approximately 10 minutes with the engine running.
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If the auxiliary battery is not sufficiently charged or the voltage decreases temporarily, the amount of power assist will be reduced and the EPS warning light will come on. In such cases, the amount of power assist returns to normal when the auxiliary battery voltage recovers.
FREEZE FRAME DATA FREEZE FRAME DATA NOTICE:
It is difficult to show the specified values (judgment values) clearly because freeze frame data values change significantly due to differences in measurement conditions, surroundings, or vehicle conditions...
DATA LIST / ACTIVE TEST DATA LIST HINT: Using the GTS to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts...
Other information:
CAUTION / NOTICE / HINT NOTICE: After replacing the skid control ECU (brake actuator assembly), perform "Calibration". Click here
PROCEDURE 1. PRE-INSPECTION (a) Brake pedal inspection (1) Perform a visual inspection and operate the brake pedal to check for any malfunctions...
INSPECTION PROCEDURE 1. INSPECT BRAKE CYLINDER AND PISTON (a) Check the rear disc brake cylinder bore and rear disc brake piston for rust and scoring. If necessary, replace the rear disc brake cylinder assembly and rear disc brake piston. 2. INSPECT PAD LINING THICKNESS (a) Using a ruler, measure the rear disc brake pad lining thickness...
Categories
Before refueling, close all the doors, windows, and the liftgate/trunk
lid, and switch the ignition OFF.
To open the fuel-filler lid, pull
the remote fuel-filler lid release.
To remove the fuel-filler cap, turn it counterclockwise.
Attach the removed cap to the
inner side of the fuel-filler lid.
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