Headlamp: Adjustments
HEADLIGHT AIMINGPRE-AIMING INSTRUCTIONS
1. Inspect for badly rusted or faulty headlight assemblies.
2. These conditions must be corrected before a satisfactory adjustment can be made.
3. Place the vehicle on a level floor.
4. Bounce the front suspension through three (3) oscillations by applying the body weight to hood or bumper.
5. Inspect tire inflation, and adjust if necessary.
6. Rock vehicle sideways to allow vehicle to assume its normal position.
7. If the fuel tank is not full, place a weight in luggage room of vehicle to simulate weight of a full tank [3 kg (6.5 pounds) per gallon.)
8. There should be no other load in the vehicle other than driver or substituted weight of approximately 70 kg (150 pounds) placed in driver's position.
9. Thoroughly clean headlight lenses.
AIMING WITH SCREEN OR WALL
Headlight Aim preparation
1. Set the distance between the screen and the bulb center marks of the headlight as shown in the illustration.
2. Four lines of adhesive tape (or equivalent markings) are required on screen or wall:
1. Position a vertical tape or mark so that it is aligned with the vehicle center line.
2. Position a horizontal tape or mark with reference to center line of headlight bulb.
3. Position a vertical tape or mark on the screen with reference to the center line of each headlight bulb.
Visual Headlight Adjustment
3. A properly aiming low-beam will on the aiming screen 3 m (9.8 feet) in front the vehicle. The shaded area as shown in the illustration indicates high intensity zone.
NOTE: 3 m (9.8 feet) in front of the vehicle must be the distance measured from the headlight center mark.
Standard value:
(Vertical direction) 21 mm (0.8.inch) below horizontal (H)
(Horizontal direction) Position where the 15 degree angle sloping section intersects the vertical line (V)
4. When adjusting headlight, disconnect the other headlight harness.
CAUTION: Do not a headlight for more than three minutes or the plastic headlight lens will be deformed.
5. Turn the adjusting screws, adjust low-beam of the headlights to match the specified pattern on the aiming screen.
NOTE: If the visual low-beam headlight adjustment is made, high beam adjustment is not necessary.
Vertical Adjusting
6. Turn the adjusting screw so that the low-beam axis meets the standard value.
7. Check to see if the light distribution projected on the aiming screen is the same as the light distribution pattern described in Visual Headlight Adjustment.
8. If the differ, turn the vertical adjusting screw to adjust the vertical angle until the light distribution coincides with the correct lighting pattern.
Horizontal Adjusting
9. Check to see if the light distribution projected on the aiming screen is the same as the light distribution pattern described in Visual Headlight Adjustment.
10. If they differ, turn the horizontal adjusting screw to adjust the horizontal angle until the light distribution coincides with the correct lighting pattern.
LUMINOUS INTENSITY MEASUREMENT
Using a photometer, and following its manufacturer's instruction manual, measure the headlight intensity and check to be sure that the limit value is satisfied.
Limit: 20,000 cd or more
NOTE: When measuring the intensity maintain an engine speed of 2,000 r/min, with the battery fully charged. There may be special local regulations pertaining to headlight intensity. Be sure to make any adjustments necessary to satisfy such regulations.
If an illuminometer is used to make the measurements, convert its values to photometer values by using the following formula.
I = Er2 Where:
I = intensity (cd)
E = illumination (lux)
r = distance (m) from headlamps to illuminometer