control motor NISSAN SERENA 1993 Service Repair Manual

HEADLAMP
-
Headlamp Aiming Control-
Description (Cont'd)
lJp and down adjustrng screw
Armrng motor untt
CIRCUIT OPERATION
IExample]
Aiming switch "0"
o When
the aiming switch rs set to "0",
the motor will not
start
because the power
terminals are positioned
at the noncon-
ductive section ol lhe sensor's rotarv
unit.
0 l
2 3 Aiming
switch "O" --
"1"
o When
the aiming switchis moved from "0"
to "1",
power is
applied to the motor through the relay
operated by the
sensor's conductive secton. The
headlamps
will then move
in lhe "DOWN"
direction.
o The
motor continues lo rotate while the rotary unit
of the
sensors moves from point
A to point
B.
o The power
terminals will
lhen be positioned
at the noncon-
ductive seclion, disconnecting the power
tothe motor.
The
motor lhen slops.
Aiming switch "1"
-
"0"
o When
the aiming switch is moved from "1"
to "0",
power
ts
applied to the motor through
the relay
operated by the
conductive section of the
sensor. The
motor
will rotate to
move the headlamps in
the "UP"
direction.
o When
the rotary
unit of the sensor moves from point
B to
point A, the motor
will
stop.
EL-rts

HEADLAMP
-
Headlamp Aiming
Control-
A Cil
Lighting swrlch lsl
5r
ts EI'H)
mtri
mti Troublediagnoses
SYMPTOM: Headlamp
aiming does not operate.
E
Check 10A fse
al luse
block.
(Refer to "POWER
SUPPLY
ROUTING.")
POWER
SUPPLY CIRCUIT
CHECK (For
aiming switch)
Check if
12 volts
exist between
terminals O and
aO.
AIMING SWITCH CHECK
Check continuity between termi-
nals at each switch position.
GROUND CIRCUIT
CHECK
FOR AIMING MOTOR
Check continuity between termi-
nals rj)
and body grround.
Continuity exists ... O.K. Bepair
harness between
aiming
motor and body ground.
POWER SUPPLY CIRCUIT
CHECK
(For aiming motor unit)
Check il 12 volts
exist between
terminats 'O,
@, @, @ and
o Volt-
meter
termina Voltage
[V]Aiming
switch
posrtron
o Approx.
12"0"
o "0"
.;\ Approx.
12"1"
0 "1"
o Approx.
12
0
o Approx.
12,.3,,
0 "3"Check
harness
between aimjng
switch and aiming motor
unit.
EL.48