Infiniti I35 (A33). Manual - part 408

SEL601W

DIAGNOSTIC PROCEDURE 1

=NHEL0277S04

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

Power Supply Circuit Check

NHEL0277S0401

Check voltage between seat control unit LH terminal 1 and ground.
(Refer to wiring diagram in EL-222.)

Terminals

Ignition switch position

OFF

ACC

ON

START

1 - Ground

Battery voltage

If NG, check the following.

I

Circuit breaker

I

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

SEL602W

Ground Circuit Check

NHEL0277S0402

Check continuity between seat control unit LH terminal 33 and
ground.
(Refer to wiring diagram in EL-222.)

Terminals

Continuity

33 - Ground

Yes

GI

MA

EM

LC

EC

FE

AT

AX

SU

BR

ST

RS

BT

HA

SC

IDX

AUTOMATIC DRIVE POSITIONER

Trouble Diagnoses (Cont’d)

EL-233

DIAGNOSTIC PROCEDURE 2

=NHEL0277S05

(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.

AUTOMATIC DRIVE POSITIONER

Trouble Diagnoses (Cont’d)

EL-234

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.

SEL605W

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.

GI

MA

EM

LC

EC

FE

AT

AX

SU

BR

ST

RS

BT

HA

SC

IDX

AUTOMATIC DRIVE POSITIONER

Trouble Diagnoses (Cont’d)

EL-235

DIAGNOSTIC PROCEDURE 3

=NHEL0277S06

(Reclining encoder check)

1

CHECK RECLINING ENCODER OUTPUT SIGNAL

Measure voltage between seat control unit LH terminal 29 and ground with CONSULT-II or oscilloscope when power seat
reclining is operated.

SEL607W

OK or NG

OK

©

Reclining encoder is OK.

NG

©

GO TO 2.

2

CHECK RECLINING ENCODER INPUT SIGNAL

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

SEL608W

OK or NG

OK

©

GO TO 3.

NG

©

Replace seat control unit LH.

AUTOMATIC DRIVE POSITIONER

Trouble Diagnoses (Cont’d)

EL-236