Page 1385 of 2395

2) End
After performing preliminary check, go to symptom chart
below.
Before starting trouble diagnoses below, perform preliminary
check, EL-199. Symptom numbers in the symptom chart cor-
respond with those of preliminary check.
SYMPTOM CHARTNBEL0214S03
PROCEDURE Diagnostic procedure
REFERENCE PAGE (EL- ) 202 203 205 207 209 211 212
SYMPTOM
DIAGNOSTIC PROCEDURE 1
(Power supply and ground circuit
for Driver's seat control unit)
DIAGNOSTIC PROCEDURE 2
(Sliding encoder check)
DIAGNOSTIC PROCEDURE 3
(Reclining encoder check)
DIAGNOSTIC PROCEDURE 4
[Lifting encoder (front) check]
DIAGNOSTIC PROCEDURE 5
[Lifting encoder (rear) check]
DIAGNOSTIC PROCEDURE 6
(Sliding motor check)
DIAGNOSTIC PROCEDURE 7
(Reclining motor check)
1 No seat system functions operate. X
2Some of the seat
system functions
do not operate
during automatic/
manual operation.SlidingX
RecliningX
Lifting (Front)
Lifting (Rear)
3No functions operate during auto-
matic operation, and some/all func-
tions do not during manual opera-
tion.
4Some of the seat
system functions
do not operate
during automatic
operation.Sliding X
Reclining X
Lifting (Front) X
Lifting (Rear) X
5No automatic operation functions
operate.
6Drive position cannot be retained in
the memory.
7Does not operate
during manual
operation. (Oper-
ates during auto-
matic operation.)Sliding
Reclining
Lifting (Front)
Lifting (Rear)
8Automatic operation cannot be can-
celed.
9 Memory indicator does not light up.
X : Applicable
AUTOMATIC DRIVE POSITIONER
Trouble Diagnoses (Cont'd)
EL-200
Page 1386 of 2395
![INFINITI QX4 2001 Factory Service Manual 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]
DIAGNO INFINITI QX4 2001 Factory Service Manual 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]
DIAGNO](/manual-img/42/57027/w960_57027-1385.png)
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 11
(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.
2Some of the seat
system functions
do not operate
during automatic/
manual operation.Sliding
Reclining
Lifting (Front) X
Lifting (Rear) X
3No functions operate during auto-
matic operation, and some/all func-
tions do not during manual opera-
tion.XX
(ACC, ON
START
signal)
4Some of the seat
system functions
do not operate
during automatic
operation.Sliding
Reclining
Lifting (Front)
Lifting (Rear)
5No automatic operation functions
operate.XX
6Drive position cannot be retained in
the memory.X
(IGN ON
signal)X
7Does not operate
during manual
operation. (Oper-
ates during auto-
matic operation.)Sliding X
Reclining X
Lifting (Front) X
Lifting (Rear) X
8Automatic 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
Page 1387 of 2395
SEL601W
DIAGNOSTIC PROCEDURE 1=NBEL0214S04(Power supply and ground circuit for driver's seat control unit)
Power Supply Circuit CheckNBEL0214S0401Check voltage between seat control unit LH terminal 1 and ground.
TerminalsIgnition switch position
OFF ACC ON START
1 - Ground Battery voltage
If NG, check the following.
I40A fusible link (letterf, located in the fuse and fusible link box)
ICircuit breaker
IHarness for open or short between circuit breaker and seat
control unit LH
SEL602W
Ground Circuit CheckNBEL0214S0402Check continuity between seat control unit LH terminal 33 and
ground.
Terminals Continuity
33 - Ground Yes
AUTOMATIC DRIVE POSITIONER
Trouble Diagnoses (Cont'd)
EL-202
Page 1388 of 2395
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
Page 1389 of 2395
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
Page 1390 of 2395
DIAGNOSTIC PROCEDURE 3=NBEL0214S06(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.
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-205
Page 1391 of 2395
3 CHECK RECLINING ENCODER OPEN CIRCUIT
1. Disconnect seat control unit LH connector and reclining device LH connector.
2. Check harness continuity between seat control unit LH connector and reclining LH connector.
SEL609WA
OK or NG
OK©GO TO 4.
NG©Repair harness.
4 CHECK RECLINING ENCODER SHORT CIRCUIT
Check harness continuity between seat control unit LH connector and ground.
SEL610W
OK or NG
OK©Replace reclining encoder.
NG©Repair harness.
AUTOMATIC DRIVE POSITIONER
Trouble Diagnoses (Cont'd)
EL-206
Page 1392 of 2395
DIAGNOSTIC PROCEDURE 4=NBEL0214S07[Lifting encoder (front) check]
1 CHECK LIFTING ENCODER (FRONT) OUTPUT SIGNAL
Measure voltage between seat control unit LH terminal 19 and ground with CONSULT-II or oscilloscope when power seat
lifting (front) is operated.
SEL611W
OK or NG
OK©Lifting encoder (front) is OK.
NG©GO TO 2.
2 CHECK LIFTING ENCODER (FRONT) INPUT SIGNAL
Check voltage between seat control unit LH terminal 17 and ground.
SEL612W
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-207