Vehicles With TC-SST (When The G And Yaw Rate Sensor Is Replaced)
- Carry out steps 1 to 13 of the G and yaw rate sensor calibration for vehicles without TC-SST.
- Select the relevant system from the menu.
- Select "ACD/AYC" from the system lists in "System select", and press "OK" button.
- Select "Special function" in "ACD/AYC".
- Select "Sensor calibration" in "Special function".
- Select "Lateral G sensor calibration" from the selected item, and press "OK" button.
- The screen displays "Lateral G sensor calibration: The selected command will be executed. Are you sure? Caution: Please check the execution conditions." Then press "OK" button.
- "Execute: The command was executed." will be shown. Then press "OK" button.
- Select "Longitudinal G SNS. calibration" from the selected item, and press "OK" button.
- The screen displays "Longitudinal G SNS. calibration: The selected command will be executed. Are you sure? Caution: Please check execution conditions." Then press "OK" button.
- "Executed: The command was executed." will be shown. Then press "OK" button.
- Learning neutral point complete
- Turn the ignition switch to "LOCK" (OFF) position and then disconnect the scan tool.
When The ASC-ECU Is Replaced
- Place the vehicle on a level surface with its road wheels in the straight ahead position. CAUTION: Before connecting or disconnecting the scan tool, turn the ignition switch to the "LOCK" (OFF) position.
- Set the scan tool with the ignition at "LOCK" (OFF).
- Ignition switch: ON
- Select the relevant system from the menu.
- Select "Steering angle sensor" from the system list in "System select", and press "OK" button.
- Select "Special function" under "Steering angle sensor".
- Select "SAS Calibration" under "Special function". NOTE: If the steering angle sensor neutral point has been learned, the display will show "If SAS needs re-calibration, execute SAS calibration after executing SAS initialization". If yes, press "OK" button.
- As "SAS initialization" is selected under "SAS Calibration", press "OK" button. NOTE: At this time, if the steering angle sensor neutral point has been learned, the display will show "Do you want to start? Note This operation will dear DTCs". Then, press "OK" button.
- The display should show "Completed." Press "OK" button.
- Press the OK button.
- The display should show "SAS Calibration: Do you want to start?". Then press the OK button. NOTE: Please execute after making a tire and a steering wheel straight.
- The display should show "Completed." Press "OK" button.
- Turn the ignition switch to "LOCK" (off) position, and then turn the ignition switch ON again.
- Select the relevant system from the menu.
- Select "ABS/ASC/ASTC/WSS" from the system list under "System select", and press "OK" button.
- Select "Special function" under "ABS/ASC/ASTC/WSS".
- Select "Sensor calibration" under "Special function".
- Select "SAS calibration" under "Sensor calibration", and press "OK" button.
- The screen displays "SAS calibration: The selected command will be executed. Are you sure? Caution: Confirm the execution conditions." Then press "OK" button.
- "Executed: The command was executed." will be shown. Then press "OK" button.
- Select "Diagnostic trouble code" under "ABS/ASC/ASTC/WSS". If the diagnostic trouble code "C2205 SAS internal failure (past trouble)" is set, clear it.
- Learning neutral point complete
- Turn the ignition switch to "LOCK" (OFF) position and then disconnect the scan tool.
When The Steering Wheel Sensor Is Replaced
- Carry out steps 1 to 21 of the steering wheel sensor calibration for when the ASC-ECU is replaced.
- Select the relevant system from the menu.
- Select "ACD/AYC" from the system list in "System select", and press "OK" button.
- Select "Special function" under "ACD/AYC".
- Select "Sensor calibration" under "Special function". NOTE: If the steering angle sensor neutral point has been learned, the display will show "If SAS needs re-calibration, execute SAS calibration after executing SAS initialization". If yes, press "OK" button.
- As "SAS Calibration" is selected under "Sensor calibration", press "OK" button. NOTE: At this time, if the steering angle sensor neutral point has been learned, the display will show "Do you want to start? Note This operation will dear DTCs". Then, press "OK" button.
- The display should show "Completed." Press "OK" button.
- Press the OK button.
- The display should show "SAS Calibration: Do you want to start?". Then press the OK button. NOTE: Please execute after making a tire and a steering wheel straight.
- The display should show "Completed." Press "OK" button.
- Turn the ignition switch to "LOCK" (off) position, and then turn the ignition switch ON again.
- Select the relevant system from the menu.
- Select "ACD/AYC" from the system list under "System select", and press "OK" button.
- Select "Special function" under "ACD/AYC".
- Select "Sensor calibration" under "Special function".
- Select "SAS calibration" under "Sensor calibration", and press "OK" button.
- The screen displays "SAS calibration: The selected command will be executed. Are you sure? Caution: Confirm the execution conditions." Then press "OK" button.
- "Executed: The command was executed." will be shown. Then press "OK" button.
- Select "Diagnostic trouble code" under "ACD/AYC". If the diagnostic trouble code "U1428 G and Yaw Rate Sensor Data Error (past trouble)" is set, clear it.
- Learning neutral point complete
- Turn the ignition switch to "LOCK" (OFF) position and then disconnect the scan tool.
REMOVAL AND INSTALLATION
Note. Refer to INSTRUMENT PANEL ASSEMBLY .
Scheme 90
Scheme 90: REMOVAL AND INSTALLATION
Scheme 91
Scheme 91: ASC OFF SWITCH CONTINUITY CHECK
- As shown in the illustration, connect the circuit tester to the ASC OFF switch as a single unit.
- Check the continuity when the ASC OFF switch is pressed and released.
| Item | When the ASC OFF switch is released (No operation status) | When the ASC OFF switch is pressed |
|---|
| Continuity between terminal No. 1 and No. 2 | No continuity | Continuity exists. (2 ohms or less) |
| Continuity between terminal No. 3 and No. 4 | Continuity exists. | Continuity exists. |
ASC OFF SWITCH TERMINAL CONTINUITY
| CAUTION | When the hydraulic unit (integrated with ASC-ECU) is replaced, after turning the ignition switch ON or OFF (vehicle information from ETACS-ECU is registered), always carry out the calibration of all sensors (steering wheel sensor, G and yaw rate sensor, and brake fluid pressure sensor) at one time. (Refer to ALL SENSOR CALIBRATION (G AND YAW RATE SENSOR, STEERING WHEEL SENSOR, BRAKE FLUID PRESSURE SENSOR) .) |
Scheme 92
<< B >> HYDRAULIC UNIT (ABS-ECU) REMOVAL
| CAUTION | Be careful when removing the hydraulic unit because it is heavy. Never loosen the nuts and the bolts because the hydraulic unit cannot be disassembled. Do not drop or shock the hydraulic unit. Do not turn the hydraulic unit upside down or lay down the unit because the inner air becomes difficult to be bled. |
Scheme 93
As for removal and installation of the wheel speed sensor, refer to REMOVAL AND INSTALLATION .
| CAUTION | Do not use impact wrench. Do not drop or shock the G and yaw rate sensor. When the G and yaw rate sensor is replaced or reinstalled, always carry out calibration to make ASC-ECU learn the neutral point (Refer to G AND YAW RATE SENSOR CALIBRATION ). |
Scheme 94
| CAUTION | Be sure to remove the clock spring from the column switch and center the clock spring to prevent the damage of steering wheel sensor. If the center of the clock spring is not correctly aligned, the steering wheel may not be turned fully or the cable inside the clock spring may be broken, causing the SRS air bag to be inoperative or operated incorrectly. Before removing the steering wheel/air bag module assembly, refer to SERVICE PRECAUTIONS and DRIVER'S AIR BAG MODULE CLOCK SPRING < Except RALLIART >, DRIVER'S AIR BAG MODULE AND CLOCK SPRING < RALLIART > < RALLIART >. When the steering wheel sensor is replaced or reinstalled, always carry out calibration to make ASC-ECU learn the neutral point (Refer to STEERING WHEEL SENSOR CALIBRATION ). |
Scheme 95
>> A << STEERING WHEEL SENSOR/CLOCK SPRING/COLUMN SWITCH ASSEMBLY INSTALLATION
| CAUTION | Be sure to remove the clock spring from the column switch and center the clock spring to prevent the damage of steering wheel sensor. If the center of the clock spring is not correctly aligned, the steering wheel may not be turned fully or the cable inside the clock spring may be broken, causing the SRS air bag to be inoperative or operated incorrectly. |
Scheme 96
Scheme 97
- Align the mating marks of the clock spring. < Alignment of mating marks > Turn the clock spring clockwise fully. Turn the clock spring counterclockwise approximately three and 3/4 turns to align the mating marks. Install the clock spring to the column switch. CAUTION: Always align three mating marks of the steering wheel sensor simultaneously as shown in the illustration. If these mating marks are not aligned correctly, the steering wheel sensor may be damaged.
- Align three mating marks of the steering wheel sensor simultaneously as shown in the illustration. < Alignment of mating marks > Check the window for inspecting the neutral position of the steering wheel sensor. If the mating marks cannot be seen from the window, align the mating marks as shown in the illustration. Install the steering wheel sensor to the column switch assembly, maintaining the neutral position correctly. NOTE: A new steering wheel sensor has a pin for preventing the rotation of (fixing) the steering wheel sensor. After installing the column switch assembly, remove this pin. Install the column switch assembly to the vehicle, maintaining the neutral position correctly.
