Front Wheel Alignment: Inspection

NOTE: After adjusting wheel alignment perform the VGRS calibration.

HINT:

For the steering wheel off-center, perform the "steering off-center" (See STEERING WHEEL OFF-CENTER ).
Check that the "STRAIGHT ANG FLG" is "VALID" in the DATA LIST (See PRE-CHECK step 5.).

MEASURE VEHICLE HEIGHT Vehicle height

VEHICLE HEIGHT SPECIFICATIONS

Front	A-B: 82.7 mm (3.256 in.)
Rear	C-D: 71.2 mm (2.803 in.)

Measuring points:

A: Ground clearance of spindle center

B: Ground clearance of lower suspension arm front bolt center

C: Ground clearance of rear axle shaft center

D: Ground clearance of lower control arm front bolt center

NOTE: Before inspecting the wheel alignment, adjust the vehicle height to the specification.

If the vehicle height is not within the specification, try to adjust it by pushing down on or lifting the body.

Fig 1: Identifying Ground Clearance

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSTALL CAMBER-CASTER-KINGPIN GAUGE OR POSITION VEHICLE ON WHEEL ALIGNMENT TESTER
Follow the specific instructions of the equipment manufacturer.

Fig 2: Positioning Vehicle On Wheel Alignment Tester
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT CAMBER, CASTER AND STEERING AXIS INCLINATION

Fig 3: Camber, Caster And Steering Axis Inclination Specifications Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the steering axis inclination is not within the specification, after the camber and caster have been correctly adjusted, recheck the steering knuckle front wheel for bearing or looseness.
INSPECT TOE-IN
TOE-IN SPECIFICATIONS

Toe-in (total) A+B:0°00' +/- 12'(0° +/-0.2°) C - D: 0 +/- 2 mm (0 +/- 0.08 in.)

If the toe-in is not within the specification, adjust the rack ends.

Fig 4: Identifying Toe-In
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
ADJUST CAMBER AND CASTER
NOTE: After the camber has been adjusted, inspect the toe-in.
1. Loosen the front and/or rear adjusting cam nuts.
2. Adjust the camber and caster by front and/or rear adjusting cams.
  HINT:
  
  Try to adjust the camber and caster to the center value.
  
  Fig 5: Identifying Camber And Caster Adjusters
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. How to read adjustment chart (using examples).
  1. Measure the present alignment.
    Camber: -0+/-20' (-0.33°)
    
    Caster: 3+/-15' (3.25°)
  2. Mark the difference between the standard value (A) and the measured value (B) on the adjustment chart.
    Standard value:
    
    Camber: 0°00' (0°)
    
    Caster: 3°05' (3.08°)
    
    Formula: A - B = C
    
    Camber: 0°00' - (-0°20') = 0°20'
    
    Caster: 3°05' - 3°15' = -0°10'
    
    Fig 6: Reading Adjustment Chart (Examples)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. As shown in the chart, read the distance from the marked point to 0 point, and adjust the front and/or rear adjusting cams accordingly.
    Front cam: - (Shorter) 1.6
    
    Rear cam: - (Shorter) 3.2
  Fig 7: Camber And Caster Adjustment Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Torque the front and/or rear adjusting cam nuts.
  Torque: 98 N.m (1,000 kgf.cm, 72 ft.lbf)
ADJUST TOE-IN
NOTE: After adjusting wheel alignment perform the VGRS calibration.
1. Check or adjust the lengths of the rack ends, then adjust the toe-in.
  Rack end length difference: 3.0 mm (0.118 in.) or less
2. Remove the boot clamps.
3. Loosen the tie rod lock nuts.
4. Turn the left and right rack ends an equal amount to adjust the toe-in.
  
  Fig 8: Identifying Toe Adjustment
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  HINT:
  
  Try to adjust the toe-in to the center value.
5. Tighten the tie rod lock nuts.
6. Place the boot on the seat and clamp it.
  HINT:
  
  Make sure that the boots are not twisted.
7. Perform the VGRS system calibration (See CALIBRATION ).
8. Perform the zero point calibration of yaw rate and deceleration sensor (See PRE-CHECK

INSPECT AND ADJUST WHEEL ANGLE

Turn the steering wheel fully, and measure the turning angle.

TURNING ANGLE SPECIFICATIONS

Inside wheel	36° 42' (33° 42' - 36° 42') 36.7° (33.7° - 36.7°)
Outside wheel (Reference)	32° 36' 32.6°

If the wheel angles differ from the standard of the specification, inspect the toe-in.

Fig 9: Identifying Turning Angle

When toe-in is normal after inspection, adjust wheel angle with the knuckle stopper bolt of the lower suspension arm.
Torque: 44 N.m (450 kgf.cm, 32 ft.lbf)

Fig 10: Identifying Knuckle Stopper Bolt Of Lower Suspension Arm