Work Procedure (Pattern 4)

CHECK 4WAS FRONT ACTUATOR
1. Never drive 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.
  : GO TO 2.
PERFORM ACTIVE TEST (LOCK OPERATION)
With CONSULT
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" for "4WAS (FRONT)".
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 "DATA MONITOR" for "4WAS (FRONT)" so that it falls within the range shown below:
  4WAS STR ANG: (-3.5) - (+3.5) deg
6. Perform "LOCK" item on "ACTIVE TEST" for "4WAS (FRONT)".
7. Finish 4WAS front control unit active test.
  : GO TO 3.
STEERING ANGLE SENSOR NEUTRAL POSITION ADJUSTMENT
1. Perform the steering angle sensor neutral position adjustment. Refer to "WORK PROCEDURE ".
2. Turn the ignition switch OFF.
  : GO TO 4.
RETURN TO 4WAS FRONT ACTUATOR INITIAL POSITION
1. Start the engine.
  CAUTION: Never drive 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.
CHECK 4WAS FRONT ACTUATOR
With CONSULT
1. Check "4WAS STR ANG" item on "DATA MONITOR" for "4WAS (FRONT)".
  CAUTION: Never touch the steering wheel during the service.
  
  4WAS STR ANG: (-3.5) - (+3.5) deg
2. Turn the ignition switch OFF.
  Is the inspection result normal?
  
  YES: GO TO 6.
  
  NO: GO TO 1.
PERFORM ACTIVE TEST (SLOW MODE)
With CONSULT
1. Start the engine.
  CAUTION: Never drive the vehicle.
2. Select "SLOW MODE" item on "ACTIVE TEST" for "4WAS (FRONT)".
3. Perform "MODE START" of "ACTIVE TEST".
4. Steer the steering wheel leftward slowly until the turning stop.
  Is "OK" indicated on both right and left on "SLOW MODE"?
  
  YES: GO TO 7.
  
  NO: GO TO 1.
5. Steer the steering wheel rightward slowly until the turning stops.
PERFORM SELF-DIAGNOSIS (4WAS FRONT CONTROL UNIT)
With CONSULT

Perform self-diagnosis for "4WAS (FRONT)".

Is any error system detected?

YES: Check the error system.

NO: GO TO 8.
ERASE ERROR HISTORY
With CONSULT

Erase the memory of self-diagnostic result for "4WAS (FRONT)" and "4WAS (MAIN)/RAS/HICAS".

: END