Infiniti Q45 (FY33). Manual — part 280
System Description
Power is supplied at all times
I
to tail lamp relay terminals
q
1
and
q
6
I
through 15A fuse [No.
63
, located in the fuse, fusible link and relay box].
Ground is supplied
I
to the lighting switch terminals
q
5
and
q
8
I
through body grounds
E22
and
E36
.
SWITCH OPERATION
When the lighting switch is turned to 1ST or 2ND position, ground is supplied
I
to tail lamp relay terminal
q
2
I
from the lighting switch terminal
q
11
.
Tail lamp relay is then energized, and power is supplied
I
from tail lamp relay terminal
q
7
I
to power terminals of parking, license and tail lamps through stop and tail lamp sensor terminal
q
8
.
With power supplied, parking, license and tail lamps illuminate.
AUTO LIGHT OPERATION
BCM is connected to the optical sensor. The optical sensor sends a signal to BCM according to outside
brightness.
When the lighting switch is turned to AUTO position, ground is supplied
I
to BCM terminal
q
14
I
from the lighting switch terminal
q
42
.
When ignition switch is set to ON or START and outside is darker than the prescribed level, ground is sup-
plied
I
to tail lamp relay terminal
q
2
I
from the BCM terminal
q
11
.
Tail lamp relay is then energized, and parking, license and tail lamps illuminate.
Auto light operation allows these lamps to turn off when outside is brighter than the prescribed level.
Or the ignition switch is turned to the OFF position.
For detailed wiring diagram of auto light, refer to “HEADLAMP” (EL-82).
TAIL AND STOP WARNING LAMP
When one of the stop lamp bulbs is burned out with the stop lamp switch depressed, or one of the tail bulbs
is burned out with the lighting switch in the 1ST or 2ND position, the tail and stop warning lamp illuminate. For
details, refer to “WARNING LAMPS” (EL-157).
GI
MA
EM
LC
EC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
IDX
PARKING, LICENSE AND TAIL LAMPS
EL-111
Wiring Diagram — TAIL/L —
TEL734B
PARKING, LICENSE AND TAIL LAMPS
EL-112
TEL979A
GI
MA
EM
LC
EC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
IDX
PARKING, LICENSE AND TAIL LAMPS
Wiring Diagram — TAIL/L — (Cont’d)
EL-113
Trouble Diagnoses
Symptom
Possible cause
Repair order
Parking, license and tail lamps do
not operate.
1. 15A fuse
2. Tail lamp relay
3. Lighting switch
4. Open in tail lamp relay circuit
5. Lighting switch ground circuit
1. Check 15A fuse (No.
63
, located in fuse, fusible link
and relay box).
2. Check tail lamp relay.
3. Check lighting switch.
4-1. Check harness between tail lamp relay terminal
q
2
and lighting switch terminal
q
11
for an open circuit.
4-2. Check harness between tail lamp relay terminal
q
7
and joint connector-13 for open circuit.
5. Check lighting switch ground circuit.
Individual parking or license lamps
do not operate.
1. Bulb
2. Lamp ground
3. Open circuit
1. Check bulb.
2. Check lamp ground circuit.
3. Check harness between power supply terminal of lamp
and tail lamp relay terminal
q
7
for an open circuit.
Tail lamps do not operate. (See
note.)
1. Bulb
2. Lamp ground
3. Stop and tail lamp sensor -
related circuit
1. Check bulb.
2. Check lamp ground circuit.
3. Check stop and tail lamp sensor. (Refer to EL-167.)
Auto light malfunctioning.
—
Refer to trouble diagnoses in “HEADLAMP” (EL-69).
Note: If one of the tail lamp bulbs is burned out or if one of the circuits between the tail lamps and stop and
tail lamp sensor is open, tail and stop warning lamp in the combination meter will illuminate with the
lighting switch in the 1ST or 2ND position.
PARKING, LICENSE AND TAIL LAMPS
EL-114
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