Subaru 2009 IMPREZA, Service Manual

Page: 2977 / 3619

LI-17
Headlight Bulb
LIGHTING SYSTEM
5) Remove the light bulb retaining spring, and re-
move the bulb.
B: INSTALLATION
Install in the reverse order of removal.
C: INSPECTION
1. HALOGEN TYPE
1) Visually check the bulb for blow out.
2) Check the bulb specification. <Ref. to LI-2,
SPECIFICATION, General Description.>
3) If NG, replace the bulb with a new part.
2. HID TYPE
CAUTION:
• Do not perform work with wet hands.
• When lit (lighting switch is ON), do not touch
the harness, light internals, or metal parts of
the light.
• When performing a lighting test, make sure
that the headlight is mounted on the vehicle,
and the power supply is connected to the con-
nector on the vehicle’s side.
1) Check the bulb specification. <Ref. to LI-2,
SPECIFICATION, General Description.>
2) Install the factory HID bulb to check whether it
lights properly.
3) If it does not light properly, replace with a new
bulb.
4) Inspect the HID ballast.
Inspect the ballast in the following manner, and de-
termine whether or not to reuse.
(1) Perform cold starts (light the headlight after
turning off for 10 minutes or more), and hot
starts (light the headlight for 15 minutes or
more, then turn off for 1 minute and relight) sev-
eral times, to make sure that the headlight lights
properly.
(2) Monitor the lighting condition right after a
cold start up to a stable state (approx. 5 min.), to
see if there are any unstable conditions such as
flickering.
(3) Install bulbs with the same number of oper-
ating hours on both headlights, and light for ap-
proximately 30 minutes. Check for whether
there is a difference in brightness on the right
and left sides.
5) If there is a malfunction, replace with a new bal-
last.
LI-00809