Infiniti QX4. Electrical System (2003 year). Manual — part 30

SEL281Y

POWER SUPPLY AND GROUND CIRCUIT CHECK

NBEL0406S03

Power Supply Circuit Check

NBEL0406S0301

Terminals

Ignition switch position

(+)

(−)

OFF

ACC

ON

Connector

Terminal

(Wire color)

M123

49 (G/R)

Ground

Battery
voltage

Battery
voltage

Battery
voltage

M122

26 (G/W)

Ground

0V

Battery
voltage

Battery
voltage

M122

27 (W/B)

Ground

0V

0V

Battery
voltage

If NG, check the following.

쐌

7.5A fuse [No. 24, located in fuse block (J/B)]

쐌

7.5A fuse [No. 11, located in fuse block (J/B)]

쐌

10A fuse [No. 10, located in fuse block (J/B)]

쐌

Harness for open or short between smart entrance control unit
and fuse.

SEL282Y

Ground Circuit Check

NBEL0406S0302

Terminals

Continuity

(+)

(−)

Connector

Terminal

(Wire color)

M122

43 (B)

Ground

Yes

M123

64 (B)

GI

MA

EM

LC

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FE

AT

TF

PD

AX

SU

BR

ST

RS

BT

HA

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IDX

VEHICLE SECURITY (THEFT WARNING) SYSTEM

Trouble Diagnoses (Cont’d)

EL-469

DOOR, HOOD AND GLASS HATCH SWITCH CHECK

=NBEL0406S04

Door Switch Check

NBEL0406S0401

1

PRELIMINARY CHECK

1. Turn ignition switch OFF and remove key from ignition key cylinder.

“SECURITY” indicator lamp should blink every 2.6 seconds.

2. Close all doors, hood and glass hatch.
3. Lock doors with multi-remote controller from inside the vehicle.

“SECURITY” indicator lamp should turn on for 30 seconds.

4. Unlock any door with the door lock knob and open the door within 30 seconds after door is locked.

“SECURITY” indicator lamp should turn off.

OK or NG

OK

䊳

Door switch is OK, and go to hood switch check.

NG

䊳

GO TO 2.

2

CHECK DOOR SWITCH INPUT SIGNAL

With CONSULT-II

Check door switches (“DOOR SW-RR”, “DOOR SW-DR” and “DOOR SW-AS”) in “DATA MONITOR” mode with CON-
SULT-II.

SEL024Y

Without CONSULT-II

Check voltage between smart entrance control unit harness connector M121 terminals 1 (G/OR), 2 (Y) or 3 (R/L) and
ground.

SEL021YA

Refer to wiring diagram in EL-461.

OK or NG

OK

䊳

Door switch is OK, and go to hood switch check.

NG

䊳

GO TO 3.

VEHICLE SECURITY (THEFT WARNING) SYSTEM

Trouble Diagnoses (Cont’d)

EL-470

3

CHECK DOOR SWITCH

1. Disconnect door switch connector.
2. Check the following.

쐌

Continuity between front door switch harness connector B9 (LH) or B68 (RH) terminals 1 and 2

쐌

Continuity between front door switch harness connector B9 (LH) or B68 (RH) terminals 3 and ground

쐌

Continuity between back door switch harness connector D208 terminals 1 and 2

쐌

Continuity between rear door switch harness connector B18 (LH) or B71 (RH) terminal 1 and ground

SEL287Y

OK or NG

OK

䊳

Check the following.

쐌

Door switch ground circuit (Front or back) or door switch ground condition

쐌

Harness for open or short between smart entrance control unit and door switch

NG

䊳

Replace door switch.

GI

MA

EM

LC

EC

FE

AT

TF

PD

AX

SU

BR

ST

RS

BT

HA

SC

IDX

VEHICLE SECURITY (THEFT WARNING) SYSTEM

Trouble Diagnoses (Cont’d)

EL-471

Hood Switch Check

=NBEL0406S0402

1

PRELIMINARY CHECK

1. Turn ignition switch OFF and remove key from ignition key cylinder.

“SECURITY” indicator lamp should blink every 2.6 seconds.

2. Close all doors, hood and trunk lid.
3. Lock doors with multi-remote controller from inside the vehicle.

“SECURITY” indicator lamp should turn on for 30 seconds.

4. Unlock hood with hood opener within 30 seconds after door is locked.

“SECURITY” indicator lamp should turn off.

OK or NG

OK

䊳

Hood switch is OK, and go to trunk room lamp switch check.

NG

䊳

GO TO 2.

2

CHECK HOOD SWITCH FITTING CONDITION

OK or NG

OK

䊳

GO TO 3.

NG

䊳

Adjust installation of hood switch or hood.

3

CHECK HOOD SWITCH INPUT SIGNAL

With CONSULT-II

Check hood switch (“HOOD SWITCH”) in “DATA MONITOR” mode with CONSULT-II.

SEL354W

Without CONSULT-II

Check voltage between smart entrance control unit harness connector M121 terminal 6 (Y/B) and ground.

SEL035Y

Refer to wiring diagram in EL-460.

OK or NG

OK

䊳

Hood switch is OK, and go to glass hatch switch check.

NG

䊳

GO TO 4.

VEHICLE SECURITY (THEFT WARNING) SYSTEM

Trouble Diagnoses (Cont’d)

EL-472

4

CHECK HOOD SWITCH

1. Disconnect hood switch connector.
2. Check continuity between hood switch terminals 1 and 2.

SEL338X

OK or NG

OK

䊳

Check the following.

쐌

Hood switch ground circuit

쐌

Harness for open or short between smart entrance control unit and hood switch

NG

䊳

Replace hood switch.

GI

MA

EM

LC

EC

FE

AT

TF

PD

AX

SU

BR

ST

RS

BT

HA

SC

IDX

VEHICLE SECURITY (THEFT WARNING) SYSTEM

Trouble Diagnoses (Cont’d)

EL-473

Glass Hatch Switch Check

=NBEL0406S0403

1

CHECK GLASS HATCH SWITCH INPUT SIGNAL

Check voltage between smart entrance control unit harness connector M121 terminal 13 (L/W) and ground.

SEL326Y

Refer to wiring diagram in EL-460.

OK or NG

OK

䊳

Glass hatch switch is OK.

NG

䊳

GO TO 2.

2

CHECK GLASS HATCH SWITCH

1. Disconnect glass hatch switch connector.
2. Check continuity between glass hatch switch terminals 1 and 2.

SEL340X

OK or NG

OK

䊳

Check the following.

쐌

Glass hatch switch ground circuit

쐌

Harness for open or short between smart entrance control unit and glass hatch switch

NG

䊳

Replace glass hatch switch.

VEHICLE SECURITY (THEFT WARNING) SYSTEM

Trouble Diagnoses (Cont’d)

EL-474

SECURITY INDICATOR LAMP CHECK

=NBEL0406S05

1

CHECK INDICATOR LAMP OPERATION

With CONSULT-II

1. Select “ACTIVE TEST” in “THEFT WAR ALM” with CONSULT-II.
2. Select “THEFT IND” and touch “ON”.

SEL356W

Without CONSULT-II

1. Disconnect smart entrance control unit harness connector.
2. Check voltage between smart entrance control unit harness connector M122 terminal 38 (BR/Y) and ground.

SEL037Y

Refer to wiring diagram in EL-460.

OK or NG

OK

䊳

Security indicator lamp is OK.

NG

䊳

GO TO 2.

2

CHECK SECURITY INDICATOR LAMP

1. Disconnect security indicator lamp connector.
2. Apply 12V direct current to security indicator lamp harness connector M20 terminals 1 and 2.

SEL696Y

OK or NG

OK

䊳

GO TO 3.

NG

䊳

Replace security indicator lamp.

GI

MA

EM

LC

EC

FE

AT

TF

PD

AX

SU

BR

ST

RS

BT

HA

SC

IDX

VEHICLE SECURITY (THEFT WARNING) SYSTEM

Trouble Diagnoses (Cont’d)

EL-475

3

CHECK POWER SUPPLY CIRCUIT FOR SECURITY INDICATOR LAMP

1. Disconnect security indicator lamp connector.
2. Check voltage between security indicator lamp harness connector M20 terminal 1 (R/G) and ground.

SEL697Y

OK or NG

OK

䊳

Check harness for open or short between security indicator lamp and smart entrance
control unit.

NG

䊳

Check the following.

쐌

7.5A fuse [No. 24, located in fuse block (J/B)]

쐌

Harness for open or short between security indicator lamp and fuse

VEHICLE SECURITY (THEFT WARNING) SYSTEM

Trouble Diagnoses (Cont’d)

EL-476

FRONT DOOR KEY CYLINDER SWITCH LH CHECK

=NBEL0406S06

1

CHECK FRONT DOOR KEY CYLINDER SWITCH LH INPUT SIGNAL (LOCK/UNLOCK SIGNAL)

With CONSULT-II

Check front door key cylinder switch LH (“KEY CYL LK-SW”/“KEY CYL UN-SW”) in “DATA MONITOR” mode with CON-
SULT-II.

SEL342WF

Without CONSULT-II

1. Check the signal between smart entrance control unit harness connector M122 terminal 33 (BR) and ground with oscil-

loscope when key inserted in front door key cylinder is turned “LOCK” or “UNLOCK”.

2. Make sure signals which are shown in the figure below can be detected during 10 sec. just after key is turned “LOCK”

or “UNLOCK”.

SEL700Y

Refer to wiring diagram in EL-462.

OK or NG

OK

䊳

Front door key cylinder switch LH is OK.

NG

䊳

GO TO 2.

GI

MA

EM

LC

EC

FE

AT

TF

PD

AX

SU

BR

ST

RS

BT

HA

SC

IDX

VEHICLE SECURITY (THEFT WARNING) SYSTEM

Trouble Diagnoses (Cont’d)

EL-477

2

CHECK FRONT DOOR KEY CYLINDER SWITCH LH

1. Disconnect front door key cylinder switch LH connector.
2. Check continuity between front door key cylinder switch LH terminals.

SEL313XB

OK or NG

OK

䊳

Check the following.

쐌

Front door key cylinder switch LH ground circuit

쐌

Harness for open or short between power window main switch and front door key cyl-
inder switch LH

NG

䊳

Replace front door key cylinder switch LH.

VEHICLE SECURITY (THEFT WARNING) SYSTEM

Trouble Diagnoses (Cont’d)

EL-478

BACK DOOR KEY CYLINDER SWITCH CHECK

=NBEL0406S07

1

CHECK BACK DOOR KEY CYLINDER SWITCH INPUT SIGNAL (LOCK/UNLOCK SIGNAL)

With CONSULT-II

Check back door key cylinder switch (“KEY CYL LK-SW”/“KEY CYL UN-SW”) in “DATA MONITOR” mode with CONSULT-
II.

SEL342WG

Without CONSULT-II

Check voltage between smart entrance control unit harness connector M121 terminal 10 (LG), 11 (Y) or 12 (W/PU) and
ground.

SEL698Y

Refer to wiring diagram in EL-463.

OK or NG

OK

䊳

Back door key cylinder switch is OK.

NG

䊳

GO TO 2.

GI

MA

EM

LC

EC

FE

AT

TF

PD

AX

SU

BR

ST

RS

BT

HA

SC

IDX

VEHICLE SECURITY (THEFT WARNING) SYSTEM

Trouble Diagnoses (Cont’d)

EL-479

2

CHECK BACK DOOR KEY CYLINDER SWITCH

1. Disconnect back door key cylinder switch connector.
2. Check continuity between back door key cylinder switch terminals.

SEL345X

OK or NG

OK

䊳

Check the following.

쐌

Back door key cylinder switch ground circuit

쐌

Harness for open or short between smart entrance control unit and back door key cyl-
inder switch

NG

䊳

Replace back door key cylinder switch.

VEHICLE SECURITY (THEFT WARNING) SYSTEM

Trouble Diagnoses (Cont’d)

EL-480

DOOR LOCK/UNLOCK SWITCH CHECK

=NBEL0406S08

1

CHECK DOOR LOCK/UNLOCK SWITCH INPUT SIGNAL

With CONSULT-II

Check door lock/unlock switch (“LOCK SW DR/AS”/“UNLK SW DR/AS”) in “DATA MONITOR” mode with CONSULT-II.

SEL341W

Without CONSULT-II

1. Remove key from ignition switch.
2. Check the signal between smart entrance control unit harness connector M122 terminal 33 (BR) and ground with oscil-

loscope when door lock/unlock switch is turned “LOCK” or “UNLOCK”.

3. Make sure signals which are shown in the figure below can be detected during 10 sec. just after door lock/unlock

switch is turned “LOCK” or “UNLOCK”.

SEL699Y

Refer to wiring diagram in EL-462.

OK or NG

OK

䊳

Door lock/unlock switch is OK.

NG

䊳

Check the following.

쐌

Ground circuit for each front power window switch

쐌

Harness for open or short between each front power window switch and smart
entrance control unit connector

If above systems are normal, replace the front power window switch.

GI

MA

EM

LC

EC

FE

AT

TF

PD

AX

SU

BR

ST

RS

BT

HA

SC

IDX

VEHICLE SECURITY (THEFT WARNING) SYSTEM

Trouble Diagnoses (Cont’d)

EL-481

VEHICLE SECURITY HORN ALARM CHECK

=NBEL0406S09

1

CHECK VEHICLE SECURITY HORN

With CONSULT-II

1. Select “ACTIVE TEST” in “THEFT WAR ALM” with CONSULT-II.
2. Select “HORN” and touch “ON”.

SEL041Y

Without CONSULT-II

1. Disconnect smart entrance control unit harness connector.
2. Apply ground to smart entrance control unit harness connector M121 terminal 42 (LG/B).

SEL043YC

Refer to wiring diagram in EL-463.

OK or NG

OK

䊳

Horn alarm is OK.

NG

䊳

GO TO 2.

2

CHECK HORN RELAY

Check horn relay.

OK or NG

OK

䊳

GO TO 3.

NG

䊳

Replace horn relay.

VEHICLE SECURITY (THEFT WARNING) SYSTEM

Trouble Diagnoses (Cont’d)

EL-482

3

CHECK POWER SUPPLY FOR HORN RELAY

1. Disconnect horn relay connector.
2. Check voltage between horn relay connector E118 terminal 1 (G/B) and ground.

SEL326XA

OK or NG

OK

䊳

GO TO 4.

NG

䊳

Check the following.

쐌

7.5A fuse (No. 52, located in the fuse and fusible link box)

쐌

Harness for open or short between horn relay and fuse

4

CHECK HORN RELAY CIRCUIT

1. Disconnect horn relay connector.
2. Check voltage between terminals 3 and 5.
3. Check voltage between terminals 6 and 7.

SEL348X

OK or NG

OK

䊳

Check harness for open or short between horn relay and smart entrance control unit.

NG

䊳

Check the following.

쐌

Harness for open or short between horn relay and fuse

쐌

7.5A fuse (No. 52, located in the fuse and fusible link box)

쐌

10A fuse (No. 54, located in the fuse and fusible link box)

GI

MA

EM

LC

EC

FE

AT

TF

PD

AX

SU

BR

ST

RS

BT

HA

SC

IDX

VEHICLE SECURITY (THEFT WARNING) SYSTEM

Trouble Diagnoses (Cont’d)

EL-483

VEHICLE SECURITY HEADLAMP ALARM CHECK

=NBEL0406S10

1

CHECK VEHICLE SECURITY HEADLAMP ALARM OPERATION

With CONSULT-II

1. Select “ACTIVE TEST” in “THEFT WAR ALM” with CONSULT-II.
2. Select “HEADLAMP” and touch “ON”.

SEL042Y

Without CONSULT-II

1. Disconnect smart entrance control unit connector.
2. Apply ground to smart entrance control unit harness connector M121, M123 terminals 21 (PU/R) and 59 (PU/W).

SEL198Y

Refer to wiring diagram in EL-464.

OK or NG

OK

䊳

Headlamp is OK.

NG

䊳

GO TO 2.

2

CHECK HEADLAMP OPERATION

Does headlamp come on when turning lighting switch “ON”?

Yes

䊳

Check harness for open or short between headlamp relay and smart entrance control
unit.

No

䊳

Check headlamp system. Refer to “HEADLAMP”.

VEHICLE SECURITY (THEFT WARNING) SYSTEM

Trouble Diagnoses (Cont’d)

EL-484