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Home >> Subaru >> 2014 >> BRZ Premium >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Lighting System (Exterior) >> Lighting system >> Symptom table

Symptom table

HEADLIGHTS

Symptoms Inspection items Refer To
The headlights (both LO and HI beam) don't turn on. MAIN fuse -
Headlight dimmer switch circuit HEADLIGHT DIMMER SWITCH CIRCUIT 
Main body ECM (Network gateway computer) -
Vehicle wiring harness and connector -
The headlights (LO beam) don't turn on. H-LP LH-LO fuse, H-LP RH-LO fuse -
Headlight No. 1 bulb (1) -
Discharge headlight bulb (2) LE-51
Headlight dimmer switch circuit HEADLIGHT DIMMER SWITCH CIRCUIT 
Low beam headlight circuit LOW BEAM HEADLIGHT CIRCUIT 
Main body ECM (Network gateway computer) -
Vehicle wiring harnesses and connectors (low beam headlight - H-LP relay, chassis ground) -
One of the headlights (LO beam) doesn't turn on. H-LP LH LO, H-LP RH LO fuse -
Discharge headlight bulb LE-51
Headlight light control computer ASSY -
Headlight ASSY -
Vehicle wiring harnesses and connectors (low beam headlight - H-LP relay, chassis ground) -
The headlights (HI beam) don't turn on. H-LP LH HI, H-LP RH HI fuse -
Discharge headlight bulb LE-51
Headlight dimmer switch circuit HEADLIGHT DIMMER SWITCH CIRCUIT 
High beam headlight circuit HIGH BEAM HEADLIGHT CIRCUIT 
Vehicle wiring harnesses and connectors (low beam headlight - DIM relay, chassis ground) -
Main body ECM (Network gateway computer) -
Headlight light control computer ASSY -
One of the headlights (HI beam) doesn't turn on. H-LP LH HI, H-LP RH HI fuse -
Discharge headlight bulb LE-51
Headlight light control computer ASSY -
Headlight ASSY -
Vehicle wiring harnesses and connectors (low beam headlight - DIM relay, chassis ground) -
Flashing doesn't function. Headlight dimmer switch circuit HEADLIGHT DIMMER SWITCH CIRCUIT 
Vehicle wiring harnesses and connectors (low beam headlight - DIM relay, chassis ground) -
The headlight (discharge bulb) flickers, is dark. (2) Headlight light control computer ASSY -
Discharge headlight bulb LE-51
Vehicle wiring harnesses and connectors (low beam headlight - H-LP relay, chassis ground) -
Clearance lights don't turn on. Clearance light bulbs -
Headlight ASSY -
Headlight dimmer switch circuit HEADLIGHT DIMMER SWITCH CIRCUIT 
Vehicle wiring harnesses and connectors (low beam headlight - H-LP relay, chassis ground) -
(1) Transmission M/T
(2) Automatic transmission
TAIL LIGHTS

Symptoms Inspection items Refer To
All tail lights (including the clearance lights and the license plate light) don't turn on. TAIL fuse -
Headlight dimmer switch circuit HEADLIGHT DIMMER SWITCH CIRCUIT 
Tail light circuit TAIL LIGHT CIRCUIT 
Main body ECM (Network gateway computer) -
Vehicle wiring harness and connector -
One of the tail lights doesn't turn on. Rear combination light ASSY -
Rear combination light socket & wiring SUB-ASSY LE-67
Vehicle wiring harness and connector -
LICENSE PLATE LIGHT

Symptoms Inspection items Refer To
The license plate light doesn't turn on. License plate light bulb -
License plate light ASSY LE-73
Vehicle wiring harness and connector -
FRONT FOG LIGHTS

Symptoms Inspection items Refer To
Both front fog lights don't turn on. FR FOG RH, FR FOG LH fuse -
FR FOG relay -
Headlight dimmer switch circuit HEADLIGHT DIMMER SWITCH CIRCUIT 
Main body ECM (Network gateway computer) -
Vehicle wiring harnesses and connectors (front fog lights - instrument panel junction block ASSY, chassis ground) -
One front fog light doesn't turn on. Fog light bulb -
Vehicle wiring harness and connector -
BACK-UP LIGHT

Symptoms Inspection items Refer To
All back-up lights don't turn on. BK/UP LP fuse -
Back-up light switch ASSY (1) LE-71
Neutral start switch ASSY (2) ADJUSTMENT
Vehicle wiring harness and connector -
One of the back-up lights doesn't turn on. Back-up light bulb -
Rear light sockets & wiring -
Vehicle wiring harness and connector -
(1) Transmission M/T
(2) Automatic transmission
STOP LIGHTS

Symptoms Inspection items Refer To
All stop lights don't turn on. STOP fuse -
Noise filter INSTALLATION
Stop light switch ASSY LE-86
Vehicle wiring harness and connector -
One of the stop lights doesn't turn on. Rear combination light ASSY -
Rear combination socket & wiring SUB-ASSY LE-67
Vehicle wiring harness and connector -
CENTER STOP LIGHT

Symptoms Inspection items Refer To
Stop center light set doesn't turn on. Center stop light ASSY LE-75
Vehicle wiring harness and connector -
TURN SIGNAL LIGHTS

Symptoms Inspection items Refer To
All turn signal lights don't turn on. GAUGE fuse -
Turn signal flasher ASSY LE-92
Headlight dimmer switch ASSY LE-78
Vehicle wiring harness and connector -
One of the front turn signal lights doesn't turn on. Front turn signal light bulb -
Headlight ASSY -
Front turn signal light socket & wiring LH LE-42
Vehicle wiring harness and connector -
One of the side turn signal lights doesn't turn on. Side turn signal light bulb -
Side turn signal light ASSY -
Side turn signal light socket plug -
Vehicle wiring harness and connector -
One of the rear turn signal lights doesn't turn on. Rear turn signal light bulb -
Rear combination light ASSY -
Rear combination socket & wiring SUB-ASSY LE-67
Vehicle wiring harness and connector -
HAZARD WARNING SIGNAL LIGHTS

Symptoms Inspection items Refer To
Hazard lights don't function. (Turn signals function normally) Turn signal flasher ASSY LE-92
Clock ASSY LE-81
Vehicle wiring harness and connector -
LIGHT AUTO CUT CONTROL

Symptoms Inspection items Refer To
Light auto cut system doesn't operate. (other controls function normally) Front door courtesy light switch circuit FRONT DOOR COURTESY LIGHT SWITCH CIRCUIT
IG signal circuit IG SIGNAL CIRCUIT
Main body ECM (Network gateway computer) -
DAYTIME RUNNING LIGHT SYSTEM

Symptoms Inspection items Refer To
Daytime running light system does not operate. MPX-B fuse -
DRL relay -
Low beam headlight relay circuit LOW BEAM HEADLIGHT CIRCUIT 
Taillight relay circuit TAIL LIGHT CIRCUIT 
Main body ECU (network gateway ECU) -
Harness or connector -
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