Toyota Service Blog

Calibration Of Torque Sensor Zero Point

HINT:

Perform this operation in the following cases.

• When removing and installing "steering wheel", "tilt steering column"and "electric power steering gear".

• When replacing EMPS ECU.

(a) Place front wheels and steering wheel facing straight ahead.

(b) In case of using TOYOTA hand-held tester: Perform the torque sensor zero point initialization.

HINT:

If the EMPS ECU is replaced, however, this operation is not necessary.

(1) Stop the vehicle.

TOYOTA Hand-held Tester

TOYOTA Hand-held Tester

F12396

(2) Hook up the TOYOTA hand-held tester to the DLC3.

(3) Select the "TRQ SENS ADJUST" mode on the TOYOTA hand-held tester.

(4) Select the "ZERO POINT INITIALIZE".

(5) Following the screen instructions, perform the torque sensor zero point initialization.

HINT:

Please refer to the TOYOTA hand-held tester operator's manual for further details.

(c) In case of not using TOYOTA hand-held tester: Perform the torque sensor zero point initialization.

HINT:

If the EMPS ECU is replaced, however, this operation is not necessary.

(1) Stop the vehicle.

(2) Using SST, connect terminals Ts and CG of DLC3. SST 09843-18040

(3) Using SST, connect terminals Tc and CG of DLC3. SST 09843-18040

(4) ON and OFF the terminal Tc of DLC3 20 times within 20 sedonds.

(5) Check that the DTC C1515/15.

(d) In case of using TOYOTA hand-held tester: Perform the torque sensor zero point calibration.

HINT:

Don't touch the steering wheel.

(1) Select the "TRQ SENS ADJUST" mode on the TOYOTA hand-held tester.

(2) Select the "ZERO POINT ADJUST".

(3) Following the screen instructions, perform the torque sensor zero point calibration.

HINT:

Please refer to the TOYOTA hand-held tester operator's manual for further details.

(e) In case of not using TOYOTA hand-held tester: Perform the torque sensor zero point calibration.

HINT:

• Don't touch the steering wheel.

• Check the DTC except C1515/15 is not output.

(1) Stop the vehicle and turn the ignition switch OFF.

(2) Using SST, connect terminals Ts and CG of DLC3 and ignition switch ON.

SST 09843-18040

(3) Disconnect the SST. SST 09843-18040

_DIAGNOSTICS - ELECTRIC MOTOR POWER STEERING_

DI7QX-01