Toyota RAV4 (XA40) 2013-2018 Service Manual: System description
- Description
The eps (electronic power steering) system generates torque through the operation of the motor and the reduction gear installed on the column shaft in order to assist steering effort.
The power steering ecu determines directions and the amount of assisting power in accordance with vehicle speed signals and signals from the torque sensor built into the steering column assembly. As a result, the power steering adjusts the steering effort so that it is lighter during low speed driving and heavier during high speed driving.
- Power steering ecu: the power steering ecu calculates assisting power based on steering torque signals from the torque sensor and vehicle speed signals from the skid control ecu.
- Torque sensor: the torque sensor detects the steering effort generated when the steering wheel is turned and converts it to an electrical signal.
- Eps motor: the eps motor is activated by the current from the power steering ecu and generates torque to assist the steering effort.
- Motor rotation angle sensor: the motor rotation angle sensor consists of the resolver sensor, which excels in reliability and durability. The rotation angle sensor detects the rotation angle of the motor and outputs it to the power steering ecu. As a result, it ensures efficient eps control.
Parts location
System diagram
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How to proceed with troubleshooting
Hint:
Perform troubleshooting in accordance with the following
flowchart.
*: Use the intelligent tester.
Vehicle brought to workshop
Inspect battery voltage
Standard voltage:
11 ...
Other materials:
Center airbag sensor communication stop mode
Description
Wiring diagram
Inspection procedure
Notice:
Turn the ignition switch off before measuring the resistances of the
main wire and the branch
wire.
After the ignition switch is turned off, check that the key reminder
warning system and light
reminder warning system ...
Air outlet damper control servo motor circuit
Description
The damper servo sends pulse signals to indicate the damper position to the
air conditioning amplifier.
The air conditioning amplifier activates the motor (normal or reverse) based on
these signals to move the
mode damper to the appropriate position, which controls the air o ...
Problem symptoms table
Hint:
Use the table below to help determine the cause of the
problem symptom. The potential causes of the symptoms
are listed in order of probability in the "suspected area"
column of the table. Check each symptom by checking the
suspected areas in the order they are listed. Re ...
