seat INFINITI QX56 2004 Factory Service Manual

SRS-26
TROUBLE DIAGNOSIS
Revision: August 20072004 QX56
PRE-TEN2 FRONT RH
[OPEN]
[B1177]
The circuit for front RH seat belt buckle pre-tensioner is
open.1. Visually check the wiring harness
connections.
2. Replace the harness if it has visible
damage.
3. Replace front RH seat belt buckle
pre-tensioner.
4. Replace the air bag diagnosis sen-
sor unit.
5. Replace the related harness. PRE-TEN2 FRONT RH
[VB-SHORT]
[B1178]

The circuit for front RH seat belt buckle pre-tensioner is
shorted to some power supply circuit.
PRE-TEN2 FRONT RH
[GND-SHORT]
[B1179]

The circuit for front RH seat belt buckle pre-tensioner is
shorted to ground.
PRE-TEN2 FRONT RH
[SHORT]
[B1180]

The circuits for the front RH seat belt buckle pre-tensioner
are shorted to each other.
FR CURTN MODULE LH
[OPEN]
[B1198]

The LH side front curtain air bag module circuit is open. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace LH side curtain air bag
module.
4. Replace the air bag diagnosis sen-
sor unit.
5. Replace the related harness. FR CURTN MODULE LH
[VB-SHORT]
[B1199]

The LH side front curtain air bag module circuit is shorted
to some power supply circuits.
FR CURTN MODULE LH
[GND-SHORT]
[B1200]

The LH side front curtain air bag module circuit is shorted
to ground.
FR CURTN MODULE LH
[SHORT]
[B1201]

The circuits for the LH side front curtain air bag module are
shorted to each other.
FR CURTN MODULE RH
[OPEN]
[B1193]

The RH side front curtain air bag module circuit is open. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace RH side curtain air bag
module.
4. Replace the air bag diagnosis sen-
sor unit.
5. Replace the related harness. FR CURTN MODULE RH
[VB-SHORT]
[B1194]

The RH side front curtain air bag module circuit is shorted
to some power supply circuits.
FR CURTN MODULE RH
[GND-SHORT]
[B1195]

The RH side front curtain air bag module circuit is shorted
to ground.
FR CURTN MODULE RH
[SHORT]
[B1196]

The circuits for the RH side front curtain air bag module are
shorted to each other.
CURTAIN MODULE LH
[OPEN]
[B1150]

The LH side rear curtain air bag module circuit is open. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace LH side curtain air bag
module.
4. Replace the air bag diagnosis sen-
sor unit.
5. Replace the related harness. CURTAIN MODULE LH
[VB-SHORT]
[B1151]

The LH side rear curtain air bag module circuit is shorted to
some power supply circuits.
CURTAIN MODULE LH
[GND-SHORT]
[B1152]

The LH side rear curtain air bag module circuit is shorted to
ground.
CURTAIN MODULE LH
[SHORT]
[B1153]

The circuits for the LH side rear curtain air bag module are
shorted to each other. Diagnostic item ExplanationRepair order
Recheck SRS at each replacement

TROUBLE DIAGNOSIS
SRS-27
C
D
E
F
G
I
J
K
L
MA
B
SRS
Revision: August 20072004 QX56
NOTE:
Follow the procedures in numerical order when repairing malfunctioning parts. Confirm whether malfunction is
eliminated using air bag warning lamp or CONSULT-II each time repair is finished. If malfunction is still
observed, proceed to the next step. When malfunction is eliminated, further repair work is not required.
CURTAIN MODULE RH
[OPEN]
[B1145]
The RH side rear curtain air bag module circuit is open. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace RH side curtain air bag
module.
4. Replace the air bag diagnosis sen-
sor unit.
5. Replace the related harness. CURTAIN MODULE RH
[VB-SHORT]
[B1146]

The RH side rear curtain air bag module circuit is shorted
to some power supply circuits.
CURTAIN MODULE RH
[GND-SHORT]
[B1147]

The RH side rear curtain air bag module circuit is shorted
to ground.
CURTAIN MODULE RH
[SHORT]
[B1148]

The circuits for the RH side rear curtain air bag module are
shorted to each other.
CONTROL UNIT
[B1XXX]

Air bag diagnosis sensor unit is malfunctioning. 1. Visually check the wiring harness
connection.
2. Replace the air bag diagnosis sen-
sor unit.
OCCUPANT SENS C/U
[UNIT FAIL]
[B1017], [B1020] or [B1021]

Occupant classification system is malfunctioning. 1. Replace RH front seat cushion/
occupant classification system con-
trol unit assembly.
OCCUPANT SENS C/U
[COMM FAIL]
[B1022]

Communication between the occupant classification sys-
tem control unit and air bag diagnosis sensor unit is inter-
rupted.1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace RH front seat cushion/
occupant classification system con-
trol unit assembly.
4. Replace the air bag diagnosis sen-
sor unit.
5. Replace the related harness.
OCCUPANT SENS
[UNIT FAIL]
[B1018]

Occupant classification sensor is malfunctioning. 1. Replace RH front seat cushion/
occupant classification system con-
trol unit assembly.
BELT TENSION SENS
[UNIT FAIL]
[B1019]

Belt tension sensor is malfunctioning. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace RH front seat belt assem-
bly.
4. Replace RH front seat cushion/
occupant classification system con-
trol unit assembly.
PASS A/B INDCTR CKT
[B1023]

Front passenger air bag off indicator is malfunctioning. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace front passenger air bag off
indicator.
4. Replace the air bag diagnosis sen-
sor unit.
5. Replace the related harness. Diagnostic item ExplanationRepair order
Recheck SRS at each replacement

TROUBLE DIAGNOSIS
SRS-33
C
D
E
F
G
I
J
K
L
MA
B
SRS
Revision: August 20072004 QX56
SIDE MODULE LH
[OPEN]
[B1134]
Front LH side air bag module circuit is open. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace front LH seat back assem-
bly (front LH side air bag module).
4. Replace the air bag diagnosis sen-
sor unit.
5. Replace the related harness. SIDE MODULE LH
[VB-SHORT]
[B1135]

Front LH side air bag module circuit is shorted to some
power supply circuit.
SIDE MODULE LH
[GND-SHORT]
[B1136]

Front LH side air bag module circuit is shorted to ground.
SIDE MODULE LH
[SHORT]
[B1137]

Front LH side air bag module circuits are shorted to each
other.
SIDE MODULE RH
[OPEN]
[B1129]

Front RH side air bag module circuit is open. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace front RH seat back assem-
bly (front RH side air bag module).
4. Replace the air bag diagnosis sen-
sor unit.
5. Replace the related harness. SIDE MODULE RH
[VB-SHORT]
[B1130]

Front RH side air bag module circuit is shorted to some
power supply circuit.
SIDE MODULE RH
[GND-SHORT]
[B1131]

Front RH side air bag module circuit is shorted to ground.
SIDE MODULE RH
[SHORT]
[B1132]

Front RH side air bag module circuits are shorted to each
other.
SATELLITE SENS LH
[UNIT FAIL]
[B1118] or [B1119]
SATELLITE SENS LH
[COMM FAIL]
[B1120]

LH side air bag (satellite) sensor 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace the LH side air bag (satel-
lite) sensor.
4. Replace the air bag diagnosis sen-
sor unit.
5. Replace the related harness.
SATELLITE SENS RH
[UNIT FAIL]
[B1113] or [B1114]
SATELLITE SENS RH
[COMM FAIL]
[ B 111 5 ]

RH side air bag (satellite) sensor 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace the RH side air bag (satel-
lite) sensor.
4. Replace the air bag diagnosis sen-
sor unit.
5. Replace the related harness.
PRE-TEN FRONT LH
[OPEN]
[B1086]

The circuit for front LH seat belt pre-tensioner is open. 1. Visually check the wiring harness
connections.
2. Replace the harness if it has visible
damage.
3. Replace front LH seat belt pre-ten-
sioner.
4. Replace the air bag diagnosis sen-
sor unit.
5. Replace the related harness. PRE-TEN FRONT LH
[VB-SHORT]
[B1087]

The circuit for front LH seat belt pre-tensioner is shorted to
some power supply circuit.
PRE-TEN FRONT LH
[GND-SHORT]
[B1088]

The circuit for front LH seat belt pre-tensioner is shorted to
ground.
PRE-TEN FRONT LH
[SHORT]
[B1089]

The circuits for the front LH seat belt pre-tensioner are
shorted to each other. Diagnostic item ExplanationRepair order
Recheck SRS at each replacement

SRS-34
TROUBLE DIAGNOSIS
Revision: August 20072004 QX56
PRE-TEN FRONT RH
[OPEN]
[B1081]
The circuit for front RH seat belt pre-tensioner is open. 1. Visually check the wiring harness
connections.
2. Replace the harness if it has visible
damage.
3. Replace front RH seat belt pre-ten-
sioner.
4. Replace the air bag diagnosis sen-
sor unit.
5. Replace the related harness. PRE-TEN FRONT RH
[VB-SHORT]
[B1082]

The circuit for front RH seat belt pre-tensioner is shorted to
some power supply circuit.
PRE-TEN FRONT RH
[GND-SHORT]
[B1083]

The circuit for front RH seat belt pre-tensioner is shorted to
ground.
PRE-TEN FRONT RH
[SHORT]
[B1084]

The circuits for the front RH seat belt pre-tensioner are
shorted to each other.
PRE-TEN2 FRONT LH
[OPEN]
[B1182]

The circuit for front LH seat belt buckle pre-tensioner is
open. 1. Visually check the wiring harness
connections.
2. Replace the harness if it has visible
damage.
3. Replace front LH seat belt buckle
pre-tensioner.
4. Replace the air bag diagnosis sen-
sor unit.
5. Replace the related harness. PRE-TEN2 FRONT LH
[VB-SHORT]
[B1183]

The circuit for front LH seat belt buckle pre-tensioner is
shorted to some power supply circuit.
PRE-TEN2 FRONT LH
[GND-SHORT]
[B1184]

The circuit for front LH seat belt buckle pre-tensioner is
shorted to ground.
PRE-TEN2 FRONT LH
[SHORT]
[B1185]

The circuits for the front LH seat belt buckle pre-tensioner
are shorted to each other.
PRE-TEN2 FRONT RH
[OPEN]
[B1177]

The circuit for front RH seat belt buckle pre-tensioner is
open.1. Visually check the wiring harness
connections.
2. Replace the harness if it has visible
damage.
3. Replace front RH seat belt buckle
pre-tensioner.
4. Replace the air bag diagnosis sen-
sor unit.
5. Replace the related harness. PRE-TEN2 FRONT RH
[VB-SHORT]
[B1178]

The circuit for front RH seat belt buckle pre-tensioner is
shorted to some power supply circuit.
PRE-TEN2 FRONT RH
[GND-SHORT]
[B1179]

The circuit for front RH seat belt buckle pre-tensioner is
shorted to ground.
PRE-TEN2 FRONT RH
[SHORT]
[B1180]

The circuits for the front RH seat belt buckle pre-tensioner
are shorted to each other.
FR CURTN MODULE LH
[OPEN]
[B1198]

The LH side front curtain air bag module circuit is open. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace LH side curtain air bag
module.
4. Replace the air bag diagnosis sen-
sor unit.
5. Replace the related harness. FR CURTN MODULE LH
[VB-SHORT]
[B1199]

The LH side front curtain air bag module circuit is shorted
to some power supply circuits.
FR CURTN MODULE LH
[GND-SHORT]
[B1200]

The LH side front curtain air bag module circuit is shorted
to ground.
FR CURTN MODULE LH
[SHORT]
[B1201]

The circuits for the LH side front curtain air bag module are
shorted to each other. Diagnostic item ExplanationRepair order
Recheck SRS at each replacement

TROUBLE DIAGNOSIS
SRS-35
C
D
E
F
G
I
J
K
L
MA
B
SRS
Revision: August 20072004 QX56
FR CURTN MODULE RH
[OPEN]
[B1193]
The RH side front curtain air bag module circuit is open. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace RH side curtain air bag
module.
4. Replace the air bag diagnosis sen-
sor unit.
5. Replace the related harness. FR CURTN MODULE RH
[VB-SHORT]
[B1194]

The RH side front curtain air bag module circuit is shorted
to some power supply circuits.
FR CURTN MODULE RH
[GND-SHORT]
[B1195]

The RH side front curtain air bag module circuit is shorted
to ground.
FR CURTN MODULE RH
[SHORT]
[B1196]

The circuits for the RH side front curtain air bag module are
shorted to each other.
CURTAIN MODULE LH
[OPEN]
[B1150]

The LH side rear curtain air bag module circuit is open. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace LH side curtain air bag
module.
4. Replace the air bag diagnosis sen-
sor unit.
5. Replace the related harness. CURTAIN MODULE LH
[VB-SHORT]
[B1151]

The LH side rear curtain air bag module circuit is shorted to
some power supply circuits.
CURTAIN MODULE LH
[GND-SHORT]
[B1152]

The LH side rear curtain air bag module circuit is shorted to
ground.
CURTAIN MODULE LH
[SHORT]
[B1153]

The circuits for the LH side rear curtain air bag module are
shorted to each other.
CURTAIN MODULE RH
[OPEN]
[B1145]

The RH side rear curtain air bag module circuit is open. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace RH side curtain air bag
module.
4. Replace the air bag diagnosis sen-
sor unit.
5. Replace the related harness. CURTAIN MODULE RH
[VB-SHORT]
[B1146]

The RH side rear curtain air bag module circuit is shorted
to some power supply circuits.
CURTAIN MODULE RH
[GND-SHORT]
[B1147]

The RH side rear curtain air bag module circuit is shorted
to ground.
CURTAIN MODULE RH
[SHORT]
[B1148]

The circuits for the RH side rear curtain air bag module are
shorted to each other.
CONTROL UNIT
[B1XXX]

Air bag diagnosis sensor unit is malfunctioning. 1. Visually check the wiring harness
connection.
2. Replace the diagnosis sensor unit.
OCCUPANT SENS C/U
[UNIT FAIL]
[B1017], [B1020] or [B1021]

Occupant classification system is malfunctioning. 1. Replace RH front seat cushion/
occupant classification system con-
trol unit assembly.
OCCUPANT SENS C/U
[COMM FAIL]
[B1022]

Communication between the occupant classification sys-
tem control unit and air bag diagnosis sensor unit is inter-
rupted.1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace RH front seat cushion/
occupant classification system con-
trol unit assembly.
4. Replace the air bag diagnosis sen-
sor unit.
5. Replace the related harness.
OCCUPANT SENS
[UNIT FAIL]
[B1018]

Occupant classification sensor is malfunctioning. 1. Replace RH front seat cushion/
occupant classification system con-
trol unit assembly. Diagnostic item ExplanationRepair order
Recheck SRS at each replacement

SRS-36
TROUBLE DIAGNOSIS
Revision: August 20072004 QX56
BELT TENSION SENS
[UNIT FAIL]
[B1019]

Belt tension sensor is malfunctioning. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace RH front seat belt assem-
bly.
4. Replace RH front seat cushion/
occupant classification system con-
trol unit assembly.
PASS A/B INDCTR CKT
[B1023]

Front passenger air bag off indicator is malfunctioning. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace front passenger air bag off
indicator.
4. Replace the air bag diagnosis sen-
sor unit.
5. Replace the related harness. Diagnostic item ExplanationRepair order
Recheck SRS at each replacement

TROUBLE DIAGNOSIS
SRS-43
C
D
E
F
G
I
J
K
L
MA
B
SRS
Revision: August 20072004 QX56
Trouble Diagnosis: “AIR BAG” Warning Lamp Does Not Turn OffEHS000WJ
DIAGNOSTIC PROCEDURE 6
1. CHECK CONDITION OF AIR BAG MODULE
Inspect for deployed air bag modules or seat belt pre-tensioners.
Are air bag modules or seat belt pre-tensioners deployed?
Yes >> Refer to SRS-60, "COLLISION DIAGNOSIS" .
No >> GO TO 2.
2. CHECK THE AIR BAG FUSE
Check 10A fuse [No. 13, located in the fuse block (J/B)].
Refer to PG-4, "
POWER SUPPLY ROUTING CIRCUIT" .
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. CHECK AIR BAG FUSE AGAIN
Replace 10A fuse [No. 13, located in the fuse block (J/B)] and turn ignition switch ON.
Does the fuse blow again?
Yes >> Repair harness.
No >> Inspection End.
4. CHECK AIR BAG DIAGNOSIS SENSOR UNIT
Connect CONSULT-II and touch “START”.
Is
“AIR BAG” displayed on CONSULT-II?
Yes >> GO TO 5.
No >> Visually inspect the air bag diagnosis sensor unit har-
ness connections. If the connections are OK, replace
the air bag diagnosis sensor unit. Refer to SRS-58,
"Removal and Installation" .
5. CHECK HARNESS CONNECTION
Check for loose connections between the combination meter and the air bag diagnosis sensor unit.
OK or NG
OK >> Replace air bag diagnosis sensor unit. Refer to SRS-58, "Removal and Installation" .
NG >> Properly connect the combination meter and air bag diagnosis sensor unit harness connectors. If
“AIR BAG” warning lamp still does not turn off, replace the wiring harness.
BCIA0030E

SRS-56
SIDE AIR BAG (SATELLITE) SENSOR
Revision: August 20072004 QX56
SIDE AIR BAG (SATELLITE) SENSORPFP:98830
Removal and InstallationEHS000WR
REMOVAL
CAUTION:

Before servicing the SRS, turn the ignition switch off, disconnect both battery cables and wait at
least 3 minutes.
1. Remove seat belt pre-tensioner. Refer to SB-3, "
Removal and
Installation of Front Seat Belt" .
2. Remove side air bag (satellite) sensor nuts.
3. Disconnect the side air bag (satellite) sensor harness connector.
CAUTION:

Do not use old nuts after removal; replace with new nuts.

Check side air bag (satellite) sensor to ensure it is free of deformities, dents, cracks or rust. If it
shows any visible signs of damage, replace it with new one.

Do not disassemble side air bag (satellite) sensor.

Replace side air bag (satellite) sensor if it has been dropped or sustained an impact.
INSTALLATION
To install, reverse the removal procedure.

After the work is completed, perform self-diagnosis to check that no malfunction is detected. Refer to
SRS-20, "
SRS Operation Check" .
LHIA0057E

FRONT SEAT BELT PRE-TENSIONER
SRS-57
C
D
E
F
G
I
J
K
L
MA
B
SRS
Revision: August 20072004 QX56
FRONT SEAT BELT PRE-TENSIONERPFP:86884
Removal and Installation EHS0 00 W S
For removal and installation procedures, refer to SB-3, "Removal and Installation of Front Seat Belt" .

SRS-58
DIAGNOSIS SENSOR UNIT
Revision: August 20072004 QX56
DIAGNOSIS SENSOR UNITPFP:28556
Removal and InstallationEHS0 00 W T
REMOVAL
CAUTION:

Before servicing the SRS, turn the ignition switch off, disconnect both battery cables and wait at
least 3 minutes.
1. Disconnect the harness connectors for each air bag module and seat belt pre-tensioner.
2. Remove center console. Refer to IP-10, "
INSTRUMENT PANEL ASSEMBLY" .
3. Disconnect diagnosis sensor unit harness connectors.
4. Remove fixing bolts from the diagnosis sensor unit.
CAUTION:

Do not use old bolts; replace with new bolts.

Check diagnosis sensor unit bracket to ensure it is free of deformities, dents, cracks or rust. If it
shows any visible signs of damage, replace with new one.

Replace diagnosis sensor unit if it has been dropped or sustained an impact.
INSTALLATION
To install, reverse the removal procedure.

After the work is completed, perform self-diagnosis to check that no malfunction is detected. Refer to
SRS-20, "
SRS Operation Check" .
CAUTION:

The diagnosis sensor unit must always be installed with the arrow mark "⇐" pointing toward the
front of the vehicle for proper operation.
ECU DISCRIMINATED NO.
After replacing the diagnosis sensor unit, confirm that the diagnosis sensor unit identification is correct for the
vehicle as equipped. Refer to SRS-18, "
CONSULT-II Function (AIR BAG)" .
LHIA0053E