Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Calibration

CALIBRATION

TORQUE SENSOR ZERO POINT CALIBRATION (USING TECHSTREAM)

NOTICE:

Perform torque sensor zero point calibration if any of the following conditions occur:

• The rack and pinion power steering gear assembly has been replaced.
• There is a difference in steering effort between turning left and right.

(a) Perform inspection before calibration.

(1) Turn the power switch off.

(2) Connect the Techstream to the DLC3.

(3) Turn the power switch on (IG).

(4) Turn the Techstream on.

(5) Calibrate the rack and pinion power steering gear assembly. Enter the following menus: Chassis / EMPS / Data List.

(6) Read the Data List according to the display on the Techstream.

Standard Voltage:

8 to 16 V

NOTICE:

If the IG power supply voltage is 8 V or less, calibration cannot be performed. In this case, charge or replace the auxiliary battery, and then perform calibration.

(b) Perform torque sensor zero point calibration.

NOTICE:

If DTC C1516 (Torque Sensor Zero Point Adjustment Incomplete) is stored, the torque sensor zero point cannot be calibrated. Clear the DTCs before starting calibration.

(1) Align the front wheels straight ahead and center the steering wheel.

(2) Turn the power switch off.

(3) Connect the Techstream to the DLC3.

(4) Turn the power switch on (IG).

(5) Turn the Techstream on.

(6) Enter the following menus: Chassis / EMPS / Utility / Torque Sensor Adjustment.

NOTICE:

• Do not turn the steering wheel sharply.
• During the torque sensor zero point calibration the steering wheel will shudder. Do not touch the steering wheel until at least 3 seconds have elapsed after the shuddering has stopped.

(7) Check for DTCs.

NOTICE:

If DTC C1515, C1516, C1534 or C1581 is output, perform troubleshooting for the corresponding DTC.

ASSIST MAP WRITING (USING TECHSTREAM)

NOTICE:

Perform assist map writing if the following condition occurs:

The rack and pinion power steering gear assembly has been replaced.

(a) Turn the power switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the power switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Chassis / EMPS / Utility / Signal Check.

HINT:

• Follow the instructions on the Techstream to perform Signal Check.
• With DTC C1581 output, performing Signal Check will cause the rack and pinion power steering gear assembly to enter Signal Check and the assist map will be written automatically.

(f) Wait for at least 5 seconds.

(g) Check for DTCs.

HINT:

After writing the assist map, if DTC C1581 is output, perform the troubleshooting procedure for DTC C1581.

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