Toyota Venza: System Diagram

Toyota Venza Service Manual / Power Assist Systems / Power Steering System / System Diagram

SYSTEM DIAGRAM

Transmitting ECU (Transmitter)	Receiving ECU	Signal	Communication Method
ECM	Power Steering ECU	Engine speed signal Engine variation information signal TC terminal condition 2WD or 4WD information signal Actual output torque signal	CAN
Brake Actuator Assembly (Skid Control ECU)	Power Steering ECU	Vehicle speed (SP1) status signal Vehicle speed (SP1) signal Test mode signal VSC controlling signal ABS controlling signal FR, FL, RR and RL wheel speed signal FR, FL, RR and RL wheel speed sensor error signal FR, FL, RR and RL wheel ABS operating signal Yaw rate 1 zero point signal GL1 zero point value signal Yaw rate and acceleration sensor installation information signal Yaw rate zero point error signal VSC operation prohibition state signal Deviation of yaw rate signal FR and FL wheel TRC operating signal Difference brake pressure, FR and FL wheel signal FR, FL, RR and RL wheel speed sensor power supply drop state signal TRC operating signal VDIM controlling signal Stop light switch signal Brake control distinction signal Yaw rate and acceleration sensor axis information signal Yaw rate and acceleration sensor frame information signal	CAN
Steering Angle Sensor	Power Steering ECU	Data continuity (valid/invalid) signal +B open circuit signal Sensor malfunction signal Steering angle signal Zero point memory (in sensor) valid/invalid signal Zero point (stored in steering angle sensor) signal	CAN
Yaw Rate Sensor and Acceleration Sensor	Power Steering ECU	Yaw rate sensor and acceleration sensor signal Yaw rate sensor and acceleration sensor (valid/invalid) signal Sensor power supply voltage (IG) (valid/invalid) signal Yaw rate sensor and acceleration sensor error signal GL1 and GL2 sensor signal GL1 and GL2 sensor (valid/invalid) signal GL1 and GL2 sensor error signal Data output response non-request/request signal Yaw rate and acceleration sensor CPU monitor signal Sensor type distinction signal Yaw rate difference value signal	CAN
Power Steering ECU	ECM	EPS idle up request signal	CAN
Power Steering ECU	Air Conditioning ECU	Loading control level signal	CAN
Power Steering ECU	Combination Meter	EPS light on request signal EPS diagnostic information signal	CAN
Power Steering ECU	Brake Actuator Assembly (Skid Control ECU)	EPS assist current value invalid signal EPS torque sensor value invalid signal EPS torque sensor value signal EPS assist current value signal	CAN

Precaution

PRECAUTION 1. PRECAUTION FOR DISCONNECTING THE BATTERY CABLE NOTICE: When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is recon ...

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 ...

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Removal
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Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" ...

Disassembly
DISASSEMBLY PROCEDURE 1. REMOVE TRANSMISSION WIRE 2. REMOVE ATF TEMPERATURE SENSOR ASSEMBLY (a) Remove the 4 bolts, ATF temperature sensor assembly and clamp from the valve body assembly. Text in Illustration *1 ...