Infiniti QX4 (R50). Manual - part 346

PROCEDURE

Diagnostic procedure

REFERENCE PAGE (EL-

)

213

214

215

216

217

220

220

SYMPTOM

DIAGNOSTIC

PROCEDURE

8

[Lifting

motor

(front)

check]

DIAGNOSTIC

PROCEDURE

9

[Lifting

motor

(rear)

check]

DIAGNOSTIC

PROCEDURE

10

(Power

seat

switch

check)

DIAGNOSTIC

PROCEDURE

1

1

(Cancel

switch

check)

DIAGNOSTIC

PROCEDURE

12

(Key

,

park

position,

door

switch

and

vehicle

speed

sensor

check)

DIAGNOSTIC

PROCEDURE

13

(Seat

memory

switch

check)

DIAGNOSTIC

PROCEDURE

14

(Memory

indicator

check)

1

No seat system functions operate.

2

Some of the seat
system functions
do not operate
during automatic/
manual operation.

Sliding

Reclining

Lifting (Front)

X

Lifting (Rear)

X

3

No functions operate during auto-
matic operation, and some/all func-
tions do not during manual opera-
tion.

X

X

(ACC, ON

START

signal)

4

Some of the seat
system functions
do not operate
during automatic
operation.

Sliding

Reclining

Lifting (Front)

Lifting (Rear)

5

No automatic operation functions
operate.

X

X

6

Drive position cannot be retained in
the memory.

X

(IGN ON

signal)

X

7

Does not operate
during manual
operation. (Oper-
ates during auto-
matic operation.)

Sliding

X

Reclining

X

Lifting (Front)

X

Lifting (Rear)

X

8

Automatic operation cannot be can-
celed.

X

9

Memory indicator does not light up.

X

X : Applicable

GI

MA

EM

LC

EC

FE

AT

TF

PD

AX

SU

BR

ST

RS

BT

HA

SC

IDX

AUTOMATIC DRIVE POSITIONER

Trouble Diagnoses (Cont’d)

EL-201

SEL601W

DIAGNOSTIC PROCEDURE 1

=NBEL0214S04

(Power supply and ground circuit for driver’s seat control unit)

Power Supply Circuit Check

NBEL0214S0401

Check voltage between seat control unit LH terminal 1 and ground.

Terminals

Ignition switch position

OFF

ACC

ON

START

1 - Ground

Battery voltage

If NG, check the following.

I

40A fusible link (letter f, located in the fuse and fusible link box)

I

Circuit breaker

I

Harness for open or short between circuit breaker and seat
control unit LH

SEL602W

Ground Circuit Check

NBEL0214S0402

Check continuity between seat control unit LH terminal 33 and
ground.

Terminals

Continuity

33 - Ground

Yes

AUTOMATIC DRIVE POSITIONER

Trouble Diagnoses (Cont’d)

EL-202

DIAGNOSTIC PROCEDURE 2

=NBEL0214S05

(Sliding encoder check)

1

CHECK SLIDING ENCODER OUTPUT SIGNAL

Measure voltage between seat control unit LH terminal 18 and ground with CONSULT-II or oscilloscope when power seat
slide is operated.

SEL603W

OK or NG

OK

©

Sliding encoder is OK.

NG

©

GO TO 2.

2

CHECK SLIDING ENCODER INPUT SIGNAL

Check voltage between seat control unit LH terminal 17 and ground.

SEL604W

OK or NG

OK

©

GO TO 3.

NG

©

Replace seat control unit LH.

GI

MA

EM

LC

EC

FE

AT

TF

PD

AX

SU

BR

ST

RS

BT

HA

SC

IDX

AUTOMATIC DRIVE POSITIONER

Trouble Diagnoses (Cont’d)

EL-203

3

CHECK SLIDING ENCODER OPEN CIRCUIT

1. Disconnect seat control unit LH connector and sliding device LH connector.
2. Check harness continuity between seat control unit LH connector and sliding device LH connector.

SEL605WA

OK or NG

OK

©

GO TO 4.

NG

©

Repair harness.

4

CHECK SLIDING ENCODER SHORT CIRCUIT

Check harness continuity between seat control unit LH connector and ground.

SEL606W

OK or NG

OK

©

Replace sliding encoder.

NG

©

Repair harness.

AUTOMATIC DRIVE POSITIONER

Trouble Diagnoses (Cont’d)

EL-204