Toyota Venza: System Description
SYSTEM DESCRIPTION
1. DESCRIPTION
- The 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 ECU adjusts the steering effort so that it is lighter during low speed driving and heavier during high speed driving.
(a) 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 brake actuator assembly (skid control ECU).
(b) Torque sensor:
The torque sensor detects the steering effort generated when the steering wheel is turned and converts it to an electrical signal.
(c) Power steering motor:
The power steering motor is activated by the current from the power steering ECU and generates torque to assist the steering effort.
(d) 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.
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use the following procedure to troubleshoot the power steering system.
*: Use the Techstream.
PROCEDURE
1.
VEHICLE BROUGHT ...
Calibration
CALIBRATION
1. ROTATION ANGLE SENSOR INITIALIZATION AND TORQUE SENSOR ZERO POINT CALIBRATION
NOTICE:
Clear the rotation angle sensor calibration value, initialize the rotation angle
sensor, and c ...
Other materials about Toyota Venza:
Engine coolant
The coolant level is satisfactory if it is between the “F” and “L” lines on the
reservoir when the engine is cold.
1. Reservoir cap
2. Full
3. Low
If the level is on or below the “L” line, add coolant up to the “F” line.
- If the ...
Lost Communication with ECM / PCM "A" (U0100)
DESCRIPTION
The engine control unit communicates with the TCM using the Controller Area Network
(CAN).
If there is a problem in this communication, the TCM sets a DTC.
DTC No.
DTC Detection Condition
Trouble Area
...
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT COOLING FAN MOTOR
(a) Check that the motor operates smoothly when the battery is connected
to the cooling fan motor connector.
Text in Illustration
*1
Componen ...
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