With TOYOTA Hand-Held Tester

ZERO POINT CALIBRATION OF STEERING ANGLE, MASTER CYLINDER PRESSURE, YAW RATE AND DECELERATION SENSORS

With TOYOTA hand-held tester:

HINT:
When having replaced the steering angle sensor, master cylinder pressure sensor. yaw rate and deceleration sensor and/or skid control ECU, make sure to perform steering angle, master cylinder pressure sensor and deceleration sensor zero point calibration.
Zero point calibration is needed not only when replacing the VSC related parts, but also when replacing or repairing the steering related parts and when changing the vehicle's straight-ahead condition for toe adjustment.

NOTICE:
- While obtaining the zero point, keep the vehicle stationary and do not vibrate, tilt, move, or shake it. (Do not start the engine.)
- Be sure to do this on a level surface (with an inclination of less than 1 degree).

(a) Clear the DTC
(b) Registration of the new skid control ECU.

NOTICE:
In case of replacing the skid control ECU on a 4WD vehicle, the registration for the 4WD vehicle to the ECU is necessary.
If performing this registration on a 2WD vehicle by mistake, the registration cannot be put back for 2WD vehicle

HINT:
A new skid control ECU is set to be used on a 2WD vehicle. If the skid control ECU is being installed on a 4WD vehicle, use the following procedure to set the ECU for 4WD use:
(1) Turn the ignition switch ON.
(2) Move the shift lever to the P Position.
(3) Move the transfer shift lever to the L4 position.

HINT:
For zero point calibration, keep the transfer shift lever in the L4 position.

(4) Check that the VSC buzzer sounds for 3 seconds.

HINT:
- This registration and VSC buzzer will occur only the first time this procedure is completed after the skid control ECU is replaced.
- After this procedure, it will not be possible to install this skid control ECU in a 2WD vehicle.

(c) Perform zero point calibration of the steering angle sensor, yaw rate, and deceleration sensor.

(1) Turn the ignition switch OFF.
(2) Move the shift lever to the P position and the brake pedal released.





(3) Hook up the TOYOTA hand-held tester to the DLC3
(4) Turn the ignition switch ON.
(5) Set the TOYOTA hand-held tester to test mode ("Signal Check" mode).

HINT:
Refer to the TOYOTA hand-held tester operator's manual for further details.

(6) Keep the vehicle stationary on a level surface for 4 seconds or more.
(7) Turn the steering wheel at least 5 degrees in each direction. Then hold the steering wheel straight-ahead (0 degrees).
(8) Press the TRAC OFF switch (for 2WD vehicle) or VSC OFF switch (for 4WD vehicle) 3 times within 3 seconds.
(9) Check that the VSC buzzer sounds for 3 seconds

HINT:
If the buzzer does not sound, check the VSC buzzer circuit, the perform the zero point calibration again.

(10) Turn the ignition switch OFF and disconnect the TOYOTA hand-held tester. from the DLC3.

(d) Check the DTC.