Programming and Relearning

POWER STEERING: POWER STEERING SYSTEM: CALIBRATION

1. TORQUE SENSOR ZERO POINT CALIBRATION (USING TECHSTREAM)

NOTICE:
Perform the torque sensor zero point calibration when any of the following conditions occur.

* The steering column assembly (containing the torque sensor) has been replaced.

* The power steering ECU has been replaced.

* The steering wheel has been replaced.

* The steering gear assembly has been replaced.

* There is a difference in steering effort between turning right and left.

HINT
When torque sensor zero point calibration is performed, the assist map is written automatically at the same time.

(a) Center the steering wheel and align the front wheels straight ahead.

(b) Connect a Techstream to the DLC3.

(c) Start the engine and turn the tester on.

(d) Enter the following menus:

Chassis / EMPS / Utility / Torque Sensor Adjustment.

(e) Initialize the torque sensor zero point calibration signal and perform the zero point calibration by following the prompts on the tester screen.

NOTICE:
Do not touch the steering wheel during the calibration.

(f) Confirm that no DTCs are output after the zero point calibration is completed.

(1) When DTC C1515/15 is output, DTC 15.

(2) When DTC C1516/16 is output, DTC 16.

(3) When DTC C1534/34 is output, C1531.

(4) When DTC C1581/81 is output, Power Steering System.

2. TORQUE SENSOR ZERO POINT CALIBRATION (USING SST CHECK WIRE)





(a) Center the steering wheel and align the front wheels straight ahead.

(b) Initialize the torque sensor zero point calibration signal.

HINT
If the power steering ECU is replaced, initialization is not necessary.

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

(2) Turn the ignition switch to ON and wait for 3 seconds or more.

(3) Using SST, connect terminals TS and CG of the DLC3.

SST : 09843-18040

(4) Using SST, connect terminals TC and CG of the DLC3.

SST : 09843-18040

(5) Disconnect and reconnect terminal TC of the DLC3 20 times or more within 20 seconds.

(6) Check that PS warning light comes on and DTC C1515/15 is output.

(7) Turn the ignition switch to OFF.

HINT
Perform the torque sensor zero point calibration after turning the ignition switch to OFF.

(c) Perform the torque sensor zero point calibration.

NOTICE:
Do not touch the steering wheel during the calibration.

HINT
Check whether any DTCs except C1515/15 are output.

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

(2) Using SST, connect terminals TS and CG of the DLC3 and turn the ignition switch to ON.

SST : 09843-18040

(3) Wait for 5 seconds after the PS warning light comes on.

(4) Confirm that the PS warning light blinks at intervals of 0.125 seconds (4Hz blink).





(5) Disconnect the SST.

SST : 09843-18040

(6) Confirm that no DTCs are output.

1 When DTC C1515/15 is output, DTC 15.

2 When DTC C1516/16 is output, DTC 16.

3 When DTC C1534/34 is output, C1531.

4 When DTC C1581/81 is output, Power Steering System.