Infiniti Q45 (FY33). Manual - part 312

Trouble Diagnosis

SYMPTOM CHART

REFERENCE PAGE

EL-239

EL-240

—

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