Programming and Relearning
4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT: Description
^ Perform 4WAS front actuator adjustment when performing any service below.
- 4WAS front actuator and the steering components (included adjusting wheel alignment) removal.
CAUTION:
^ Check the following items before the removal.
- Turn 4WAS warning lamp OFF after the engine starts.
- Perform the self-diagnosis of each control unit of 4WAS system (4WAS front control unit and 4WAS main control unit). Check that 4WAS system controls properly.
^ 4WAS front actuator and the steering components (included adjusting wheel alignment) installation.
^ 4WAS front control unit and the steering angle sensor replacement.
^ When driving while misaligning the steering wheel position (center) after installing 4WAS front actuator.
4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT: Special Repair
Requirement (Pattern 1)
1. 4WAS FRONT ACTUATOR ADJUSTMENT
With CONSULT-III
1. Start the engine.
CAUTION: Stop the vehicle.
2. Turn the steering wheel to adjust "ACTR ROTA ANG" of the 4WAS front control unit "DATA MONITOR" so that it falls within the range shown below:
ACTR ROTA ANG: -3.5 - 3.5°
3. Turn the ignition switch OFF.
CAUTION: Never touch the steering wheel after turning ignition switch OFF.
>> END
4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT: Special Repair
Requirement (Pattern 2)
1. 4WAS FRONT ACTUATOR ADJUSTMENT
With CONSULT-III
1. Turn the ignition switch ON.
CAUTION: Never start the engine.
2. Steer to 30° leftward slowly. Steer to 30° rightward and return the steering wheel to the straight-ahead position.
3. Perform the steering angle sensor neutral position adjustment. Refer to, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION: Special Repair Requirement". Testing and Inspection
4. Turn the ignition switch OFF.
>> GO TO 2.
2. PERFORM ACTIVE TEST (SLOW MODE)
With CONSULT-III
1. Start the engine.
CAUTION: Stop the vehicle.
2. Select "SLOW MODE" item on "ACTIVE TEST" of 4WAS front control unit.
3. Perform "MODE START" of "ACTIVE TEST".
4. Steer the steering wheel leftward slowly until the turning stops.
5. Steer the steering wheel rightward slowly until the turning stops.
Is "OK" indicated on both right and left on "SLOW MODE"?
YES >> GO TO 3.
NO STC-30, "4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT: Special Repair Requirement (Pattern 4)".
3. PERFORM SELF-DIAGNOSIS (4WAS FRONT CONTROL UNIT)
With CONSULT-III
Perform 4WAS front control unit self-diagnosis.
NOTE: Detect DTC "C1671" when replacing 4WAS front control unit or performing 4WAS front actuator adjustment. DTC "C1671" becomes past record if 4WAS front actuator adjustment is completed normally
Is any error system detected?
YES >> Check the error system.
NO >> GO TO 4.
4. ERROR HISTORY ERASE
With CONSULT-III
Erase the memory of 4WAS main control unit and 4WAS main control unit self-diagnosis result.
>> END
4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT: Special Repair
Requirement (Pattern 3)
1. PERFORM ACTIVE TEST (LOCK OPERATION)
With CONSULT-III
1. Stop the vehicle to the straight-ahead position.
2. Turn the ignition switch ON.
CAUTION: Never start the engine.
3. Select "LOCK OPERATION" item on "ACTIVE TEST" of 4WAS front control unit.
4. Perform "RELEASE" of "ACTIVE TEST".
CAUTION:
^ Turn the steering wheel 90°. Check that the front wheels do not move.
^ Never turn the steering wheel during "RELEASE".
5. Turn the steering wheel to adjust "4WAS STR ANG" of the 4WAS front control unit "DATA MONITOR" so that it falls within the range shown below:
4WAS STR ANG: -3.5 - 3.5°
6. Perform "LOCK" item on "ACTIVE TEST" of 4WAS front control unit.
7. Steer to 30° leftward slowly. Steer to 30° rightward and return the steering wheel to the straight-ahead position.
8. Finish 4WAS front control unit active test.
>> GO TO 2.
2. STEERING ANGLE SENSOR NEUTRAL POSITION ADJUSTMENT
1. Perform the steering angle sensor neutral position adjustment. Refer to, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION: Special Repair Requirement". Testing and Inspection
2. Turn the ignition switch OFF.
>> GO TO 3.
3. RETURN TO 4WAS FRONT ACTUATOR INITIAL POSITION
1. Start the engine.
CAUTION: Stop the vehicle.
2. Steer 90° leftward slowly Then steer 90° rightward.
3. Steer 90° leftward slowly again. Then steer 90° rightward. Return the steering wheel to the straight-ahead position.
4. Stop the vehicle in the straight-ahead position after driving for a period of time. (When engine is running)
>> GO TO 4.
4. CHECK 4WAS FRONT ACTUATOR INSPECTION
With CONSULT-III
1. Check "4WAS STR ANG" item on "DATA MONITOR" of 4WAS front control unit.
CAUTION: Never touch the steering wheel during the service.
4WAS STR ANG -3.5 - 3.5°
2. Turn the ignition switch OFF.
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 1.
5. PERFORM ACTIVE TEST (SLOW MODE)
With CONSULT-III
1. Start the engine.
CAUTION: Stop the vehicle.
2. Select "SLOW MODE" item on "ACTIVE TEST" of 4WAS front control unit.
3. Perform "MODE START" of "ACTIVE TEST".
4. Steer the steering wheel leftward slowly until the turning stops.
5. Steer the steering wheel rightward slowly until the turning stops.
Is "OK" indicated on both right and left on "SLOW MODE"?
YES >> GO TO 6.
NO >> Refer to "4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT: Special Repair Requirement (Pattern 4)".
6. PERFORM SELF-DIAGNOSIS (4WAS FRONT CONTROL UNIT)
With CONSULT-III
Perform 4WAS front control unit self-diagnosis.
Is any error system detected?
YES >> Check the error system.
NO >> GO TO 7.
7. ERROR HISTORY ERASE
With CONSULT-III
Erase the memory of 4WAS main control unit and 4WAS main control unit self-diagnosis result.
>> END
4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT: Special Repair
Requirement (Pattern 4)
1. CHECK 4WAS FRONT ACTUATOR
1. Stop the vehicle to the straight-ahead position.
2. Remove and install 4WAS front actuator again. Check the installation condition.
3. Check that the steering wheel is neutral.
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 1.
2. PERFORM ACTIVE TEST (LOCK OPERATION)
With CONSULT-III
1. Stop the vehicle to the straight-ahead position.
2. Turn the ignition switch ON.
CAUTION: Never start the engine.
3. Select "LOCK OPERATION" item on "ACTIVE TEST" of 4WAS front control unit.
4. Perform "RELEASE" of "ACTIVE TEST".
CAUTION:
^ Turn the steering wheel 90°. Check that the front wheels do not move.
^ Never turn the steering wheel during "RELEASE".
5. Turn the steering wheel to adjust "4WAS STR ANG" of the 4WAS front control unit "DATA MONITOR" so that it falls within the range shown below:
4WAS STR ANG: -3.5 - 3.5°
6. Perform "LOCK" item on "ACTIVE TEST" of 4WAS front control unit.
7. Finish 4WAS front control unit active test.
>> GO TO 3.
3. STEERING ANGLE SENSOR NEUTRAL POSITION ADJUSTMENT
1. Perform the steering angle sensor neutral position adjustment. Refer to, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION: Special Repair Requirement". Testing and Inspection
2. Turn the ignition switch OFF.
>> GO TO 4.
4. RETURN TO 4WAS FRONT ACTUATOR INITIAL POSITION
1. Start the engine.
CAUTION: Stop the vehicle.
2. Steer 90° leftward slowly. Then steer 90° rightward.
3. Steer 90° leftward slowly again. Then steer 90° rightward. Return the steering wheel to the straight-ahead position.
4. Stop the vehicle in the straight-ahead position after driving for a period of time. (Engine running)
>> GO TO 5.
5. CHECK 4WAS FRONT ACTUATOR
With CONSULT-III
1. Check "4WAS STR ANG" item on "DATA MONITOR" of 4WAS front control unit.
CAUTION: Never touch the steering wheel during the service.
4WAS STR ANG: -3.5 - 3.5°
2. Turn the ignition switch OFF.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 1.
2. PERFORM ACTIVE TEST (SLOW MODE)
With CONSULT-III
1. Start the engine.
CAUTION: Stop the vehicle.
2. Select "SLOW MODE" item on "ACTIVE TEST" of 4WAS front control unit.
3. Perform "MODE START" of "ACTIVE TEST".
4. Steer the steering wheel leftward slowly until the turning stops.
5. Steer the steering wheel rightward slowly until the turning stops.
Is "OK" indicated on both right and left on "SLOW MODE"?
YES >> GO TO 7.
NO >> GO TO 1.
7. PERFORM SELF-DIAGNOSIS (4WAS FRONT CONTROL UNIT)
With CONSULT-III
Perform 4WAS front control unit self-diagnosis.
Is any error system detected?
YES >> Check the error system.
NO >> GO TO 8.
8. ERROR HISTORY ERASE
With CONSULT-III
Erase the memory of 4WAS front control unit and 4WAS main control unit self-diagnosis result.
>> END