Infiniti Q45 (FY33). Manual — part 312
Trouble Diagnosis
SYMPTOM CHART
REFERENCE PAGE
—
SYMPTOM
MAIN
POWER
SUPPL
Y
AND
GROUND
CIRCUIT
CHECK
DIAGNOSTIC
PROCEDURE
1
Replace
T
runk
Closure
Unit
Trunk closure does not operate for closing
and opening trunk lid.
X
X
Trunk closure operation does not stop.
X
Trunk closure operation stops in an unstable
trunk lid position.
X
SEL820V
POWER SUPPLY AND GROUND CIRCUIT CHECK
Power supply circuit check
Terminal
Ignition switch
!
@
OFF
ACC
ON
q
2
Ground
Battery
voltage
Battery
voltage
Battery
voltage
SEL821V
Ground circuit check
Terminals
Continuity
q
4
- Ground
Yes
GI
MA
EM
LC
EC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
IDX
TRUNK CLOSURE
EL-239
SEL948V
DIAGNOSTIC PROCEDURE 1
SEL949V
SEL823V
CHECK TRUNK CLOSURE MOTOR
OPERATION.
1. Open trunk lid and remove the trunk
room trim.
2. Disconnect trunk room lamp switch con-
nector and check the operation of trunk
closure motor.
3. Apply ground to trunk room lamp switch
harness connector terminal
q
1
.
4. Check the operation of trunk closure
motor.
Does trunk closure motor operate when
trunk room lamp switch connector is
disconnected or ground is applied to
trunk room lamp switch harness con-
nector terminal
q
1
?
Trunk closure motor should operate.
NG
E
OK
q
A
CHECK GROUND CIRCUIT FOR
STRIKER SWITCH.
1. Disconnect striker switch harness con-
nector.
2. Check harness continuity between
striker switch harness connector termi-
nal
q
2
and ground.
Continuity should exist.
OK
E
NG
Check harness for open or
short between striker
switch and ground.
CHECK POWER SUPPLY TO TRUNK
ROOM LAMP SWITCH.
1. Disconnect trunk room lamp switch
harness connector and trunk closure
control unit connector
T14
.
2. Check voltage between trunk closure
control unit and trunk room lamp switch
harness connectors terminal
q
1
and
ground respectively.
Battery voltage should exist.
OK or NG
OK
E
NG
Check power supply circuit
to trunk closure control unit
harness connector terminal
q
1
and trunk room lamp
switch harness connector
terminal
q
1
for open or
short.
Replace trunk closure units.
TRUNK CLOSURE
Trouble Diagnosis (Cont’d)
H
H
H
EL-240
SEL825V
SEL822V
q
A
CHECK TRUNK ROOM LAMP SWITCH.
Disconnect trunk room lamp switch har-
ness connector.
Check continuity between the trunk room
lamp switch harness connector terminal
q
1
and
q
2
.
When lock the trunk room lid lock
Continuity should not exist.
When unlock the trunk room lid lock
Continuity should exist.
OK or NG
OK
E
NG
Replace trunk lid lock
which has trunk room lamp
switch.
CHECK GROUND CIRCUIT.
1. Disconnect trunk room lamp switch
harness connector.
2. Check the harness continuity between
trunk room lamp switch harness con-
nector and ground.
Continuity should exist.
OK or NG
OK
E
NG
Check harness for open or
short between trunk room
lamp switch and ground.
Trunk closure electric system is OK.
Check mechanical malfunction.
GI
MA
EM
LC
EC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
IDX
TRUNK CLOSURE
Trouble Diagnosis (Cont’d)
H
H
H
EL-241
Component Parts and Harness Connector
Location
SEL943W
System Description
OUTLINE
Electric sunroof system consists of
I
Sunroof switch
I
Sunroof motor assembly
I
Sunroof relay
I
BCM (Body Control Module)
BCM controls the operation of sunroof relay. Power is supplied to sunroof motor assembly through sunroof
relay. Sunroof will be operated depending on sunroof switch condition.
OPERATION
I
Sunroof can be opened or closed and tilted up or down with sunroof switch.
Auto operation
The power sunroof AUTO feature makes it possible to open and close the sunroof without holding the sunroof
switch in the down or up position.
Delayed power operation
When the ignition switch is turned to the “OFF” position, the sunroof will still operate for up to approximately
45 seconds unless driver’s side or passenger side door is opened.
Interruption detection function
The CPU of sunroof motor monitors the sunroof motor operation and the sunroof position (full closed or other)
for sunroof by the signals from sunroof motor.
When sunroof motor detects interruption during the following close operation,
I
automatic close operation when ignition switch is in the “ON” position
I
automatic close operation during retained power operation
sunroof switch controls the motor for open and the sunroof will operate about 150 mm (5.91 in).
ELECTRIC SUNROOF
EL-242
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