Infiniti QX4. Electrical System (2003 year). Manual — part 16
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
䊳
GO TO 4.
NG
䊳
Repair harness.
4
CHECK SLIDING ENCODER SHORT CIRCUIT
Check harness continuity between seat control unit LH connector and ground.
SEL606W
OK or NG
OK
䊳
Replace sliding encoder.
NG
䊳
Repair harness.
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-245
DIAGNOSTIC PROCEDURE 3
=NBEL0369S06
(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
䊳
Reclining encoder is OK.
NG
䊳
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
䊳
GO TO 3.
NG
䊳
Replace seat control unit LH.
AUTOMATIC DRIVE POSITIONER
Trouble Diagnoses (Cont’d)
EL-246
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
䊳
GO TO 4.
NG
䊳
Repair harness.
4
CHECK RECLINING ENCODER SHORT CIRCUIT
Check harness continuity between seat control unit LH connector and ground.
SEL610W
OK or NG
OK
䊳
Replace reclining encoder.
NG
䊳
Repair harness.
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-247
DIAGNOSTIC PROCEDURE 4
=NBEL0369S07
[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
䊳
Lifting encoder (front) is OK.
NG
䊳
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
䊳
GO TO 3.
NG
䊳
Replace seat control unit LH.
AUTOMATIC DRIVE POSITIONER
Trouble Diagnoses (Cont’d)
EL-248
3
CHECK LIFTING ENCODER (FRONT) OPEN CIRCUIT
1. Disconnect seat control unit LH connector and front lifting device LH connector.
2. Check harness continuity between seat control unit LH connector and front lifting device LH connector.
SEL613WA
OK or NG
OK
䊳
GO TO 4.
NG
䊳
Repair harness.
4
CHECK LIFTING ENCODER (FRONT) SHORT CIRCUIT
Check harness continuity between seat control unit LH connector and ground.
SEL614W
OK or NG
OK
䊳
Replace lifting encoder (front).
NG
䊳
Repair harness.
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-249
DIAGNOSTIC PROCEDURE 5
=NBEL0369S08
[Lifting encoder (rear) check]
1
CHECK LIFTING ENCODER (REAR) OUTPUT SIGNAL
Measure voltage between seat control unit LH terminal 30 and ground with CONSULT-II or oscilloscope when power seat
lifting (rear) is operated.
SEL615W
OK or NG
OK
䊳
Lifting encoder (rear) is OK.
NG
䊳
GO TO 2.
2
CHECK LIFTING ENCODER (REAR) INPUT SIGNAL
Check voltage between seat control unit LH terminal 17 and ground.
SEL616W
OK or NG
OK
䊳
GO TO 3.
NG
䊳
Replace seat control unit LH.
AUTOMATIC DRIVE POSITIONER
Trouble Diagnoses (Cont’d)
EL-250
3
CHECK LIFTING ENCODER (REAR) OPEN CIRCUIT
1. Disconnect seat control unit LH connector and rear lifting device LH connector.
2. Check harness continuity between seat control unit LH connector and rear lifting device LH connector.
SEL617WA
OK or NG
OK
䊳
GO TO 4.
NG
䊳
Repair harness.
4
CHECK LIFTING ENCODER (REAR) SHORT CIRCUIT
Check harness continuity between seat control unit LH connector and ground.
SEL618W
OK or NG
OK
䊳
Replace lifting encoder (rear).
NG
䊳
Repair harness.
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-251
DIAGNOSTIC PROCEDURE 6
=NBEL0369S09
(Sliding motor check)
1
CHECK OUTPUT SIGNAL TO SLIDING MOTOR
Check voltage between seat control unit LH terminals 3 or 10 and ground.
SEL619W
OK or NG
OK
䊳
GO TO 2.
NG
䊳
Replace seat control unit LH.
2
CHECK SLIDING MOTOR
1. Disconnect sliding device LH connector.
2. Apply 12V DC direct current to motor and check operation.
SEL620WA
OK or NG
OK
䊳
Check harness for operation between seat control unit LH and sliding motor.
NG
䊳
Replace sliding motor.
AUTOMATIC DRIVE POSITIONER
Trouble Diagnoses (Cont’d)
EL-252
DIAGNOSTIC PROCEDURE 7
=NBEL0369S10
(Reclining motor check)
1
CHECK OUTPUT SIGNAL TO RECLINING MOTOR
Check voltage between seat control unit LH terminals 4 or 12 and ground.
SEL621W
OK or NG
OK
䊳
GO TO 2.
NG
䊳
Replace seat control unit LH.
2
CHECK RECLINING MOTOR
1. Disconnect reclining device LH connector.
2. Apply 12V DC direct current to motor and check operation.
SEL622WA
OK or NG
OK
䊳
Check harness for operation between seat control unit LH and reclining motor.
NG
䊳
Replace reclining motor.
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-253
DIAGNOSTIC PROCEDURE 8
=NBEL0369S11
[Lifting motor (front) check]
1
CHECK OUTPUT SIGNAL TO LIFTING MOTOR (FRONT)
Check voltage between seat control unit LH terminals 5 or 13 and ground.
SEL623W
OK or NG
OK
䊳
GO TO 2.
NG
䊳
Replace seat control unit LH.
2
CHECK LIFTING MOTOR (FRONT)
1. Disconnect front lifting device LH connector.
2. Apply 12V DC direct current to motor and check operation.
SEL624WA
OK or NG
OK
䊳
Check harness for operation between seat control unit LH and lifting motor (front).
NG
䊳
Replace lifting motor (front).
AUTOMATIC DRIVE POSITIONER
Trouble Diagnoses (Cont’d)
EL-254
DIAGNOSTIC PROCEDURE 9
=NBEL0369S12
[Lifting motor (rear) check]
1
CHECK OUTPUT SIGNAL TO LIFTING MOTOR (REAR)
Check voltage between seat control unit LH terminals 6 or 7 and ground.
SEL625W
OK or NG
OK
䊳
GO TO 2.
NG
䊳
Replace seat control unit LH.
2
CHECK LIFTING MOTOR (REAR)
1. Disconnect rear lifting device LH connector.
2. Apply 12V DC direct current to motor and check operation.
SEL626WA
OK or NG
OK
䊳
Check harness for operation between seat control unit LH and lifting motor (rear).
NG
䊳
Replace lifting motor (rear).
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-255
DIAGNOSTIC PROCEDURE 10
=NBEL0369S13
(Power seat switch check)
1
CHECK POWER SEAT SWITCH
1. Disconnect power seat switch LH connector.
2. Check continuity between power seat switch terminals.
SEL569X
OK or NG
OK
䊳
Check the following.
쐌
Ground circuit for power seat switch
쐌
Harness for open or short between seat control unit LH and power seat switch
NG
䊳
Replace power seat switch.
DIAGNOSTIC PROCEDURE 11
NBEL0369S14
(Cancel switch check)
1
CHECK CANCEL SWITCH
1. Disconnect cancel switch connector.
2. Check continuity between cancel switch terminals.
SEL628WA
OK or NG
OK
䊳
Check the following.
쐌
Ground circuit for cancel switch
쐌
Harness for open or short between seat control unit LH and cancel switch
NG
䊳
Replace cancel switch.
AUTOMATIC DRIVE POSITIONER
Trouble Diagnoses (Cont’d)
EL-256
DIAGNOSTIC PROCEDURE 12
=NBEL0369S15
(Key, detention, door switch and vehicle speed signal check)
1
CHECK KEY SWITCH INPUT SIGNAL
Check voltage between seat control unit LH terminal 2 and ground.
SEL629W
OK or NG
OK
䊳
GO TO 2.
NG
䊳
Check the following.
쐌
7.5A fuse [No. 24, located in fuse block (J/B)]
쐌
Key switch
쐌
Harness for open or short between key switch and fuse
쐌
Harness for open or short between seat control unit LH and key switch
2
CHECK IGNITION SWITCH INPUT SIGNAL (ON AND START)
Check voltage between seat control unit LH terminals and ground.
SEL630W
OK or NG
OK
䊳
GO TO 3.
NG
䊳
Check the following.
쐌
7.5A fuse [No. 11, located in fuse block (J/B)]
쐌
7.5A fuse [No. 26, located in fuse block (J/B)]
쐌
Harness for open or short between seat control unit LH and fuse
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-257
3
CHECK PARK POSITION SWITCH INPUT SIGNAL
Check voltage between seat control unit LH terminal 21 and ground.
SEL631W
OK or NG
OK
䊳
GO TO 4.
NG
䊳
Check the following.
쐌
Park position switch
쐌
Park position switch ground circuit
쐌
Harness for open or short between seat control unit LH and park position switch
4
CHECK DRIVER DOOR SWITCH INPUT SIGNAL
Check voltage between seat control unit LH terminal 9 and ground.
SEL632W
OK or NG
OK
䊳
GO TO 5.
NG
䊳
Check the following.
쐌
Driver door switch
쐌
Driver door switch ground circuit
쐌
Harness for open or short between seat control unit LH and driver door switch
5
CHECK VEHICLE SPEED SIGNAL
Does speedometer operate normally?
Yes or No
OK
䊳
GO TO 6.
NG
䊳
Check speedometer and ABS actuator and electric unit circuit. Refer to EL-139.
AUTOMATIC DRIVE POSITIONER
Trouble Diagnoses (Cont’d)
EL-258
6
CHECK VEHICLE SPEED SIGNAL PULL UP VOLTAGE
1. Turn ignition switch “ON”.
2. Check voltage between seat control unit LH terminal 32 and ground.
SEL633W
OK or NG
OK
䊳
Harness for open or short between seat control unit LH and combination meter.
NG
䊳
Repair harness.
DIAGNOSTIC PROCEDURE 13
NBEL0369S16
(Seat memory switch check)
1
CHECK SEAT MEMORY SWITCH
1. Disconnect seat memory switch connector.
2. Check continuity between seat memory switch terminals.
SEL634WA
OK or NG
OK
䊳
Check the following.
쐌
Ground circuit for seat memory switch
쐌
Harness for open or short between seat control unit LH and seat memory switch
NG
䊳
Replace seat memory switch.
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-259
DIAGNOSTIC PROCEDURE 14
=NBEL0369S17
(Memory indicator check)
1
CHECK INDICATOR LAMP
Check indicator lamp illumination.
OK or NG
OK
䊳
GO TO 2.
NG
䊳
Replace seat memory switch (indicator lamp).
2
CHECK POWER SUPPLY CIRCUIT FOR INDICATOR LAMP
1. Disconnect seat memory switch connector.
2. Check voltage between seat memory switch terminal and ground.
SEL635WA
OK or NG
OK
䊳
Check harness for open or short between seat control unit LH and seat memory switch
NG
䊳
Check the following.
쐌
7.5A fuse [No. 24 located in the fuse block (J/B)]
쐌
Harness for open or short between fuse and indicator lamp
AUTOMATIC DRIVE POSITIONER
Trouble Diagnoses (Cont’d)
EL-260
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