ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Description

Perform 4WAS front actuator adjustment after replacing 4WAS front control unit.
Perform 4WAS front actuator adjustment when performing any service below.
- 4WAS front actuator and the steering components (including wheel alignment) removal. Refer to "4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT : SPECIAL REPAIR REQUIREMENT (PATTERN 1) ".
  CAUTION:
  - Check the following items before the removal:
    
    4WAS warning lamp is turned OFF after the engine starts.
    
    Self-diagnosis of each control unit of 4WAS system (4WAS front control unit/4WAS main control unit) is performed. Check that 4WAS system is controlled properly.
- 4WAS front actuator and the steering components (including wheel alignment) installation. Refer to "4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT : SPECIAL REPAIR REQUIREMENT (PATTERN 2) ".
- 4WAS front control unit and the steering angle sensor replacement. Refer to "4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT : SPECIAL REPAIR REQUIREMENT (PATTERN 3) ".
- When driving while mis-aligning the steering wheel position (center) after installing 4WAS front actuator. Refer to "4WAS FRONT ACTUATOR NEUTRAL POSITION ADJUSTMENT : SPECIAL REPAIR REQUIREMENT (PATTERN 4) ".