2010 INFINITI QX56 wiring

B1017 – B1022 OCCUPANT CLASSIFICATION SYSTEM
SRC-67
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B1017 – B1022 OCCUPANT CLASSIFICATION SYSTEM
DescriptionINFOID:0000000005147840
DTC B1017 – B1022 OCCUPANT CL ASSIFICATION SYSTEM (OCS)
The OCS control unit is wired to the air bag diagnosis sensor unit. The air bag diagnosis sensor unit will mon-
itor the OCS for failures and interuptions in communication between the OCS control unit and the air bag
diagnosis sensor unit.
PA R T L O C AT I O N
Refer to SRC-7, "SRS Component Parts Location".
DTC LogicINFOID:0000000005147841
DTC DETECTION LOGIC
With CONSULT-lll
Without CONSULT-lll
DTC CONFIRMATION PROCEDURE (With CONSULT-lll)
1.INSPECTION START
Turn ignition switch ON.
>> GO TO 2.
CONSULT-III name DTC DTC detecting condition Repair order
OCCUPANT SENS C/U [UNIT FAIL] B1017 The OCS control unit is malfunctioning. 1. Replace the RH front seat cushion assembly.
Do not disassemble the seat cushion assem-
bly.
B1020
B1021
OCCUPANT SENS [UNIT FAIL] B1018The OCS sensor is malfunctioning.
BELT TENSION SENS [UNIT FAIL] B1019The belt tension sensor is malfunctioning. 1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. Replace the RH front seat belt assembly.
4. Replace the RH front seat cushion assembly. Do not disassemble the seat cushion assem-
bly.
5. Replace the related harness.
OCCUPANT SENS C/U [COMM FAIL] B1022Communication between the OCS control
unit and the air bag diagnosis sensor unit is
interrupted.
1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. Replace the RH front seat cushion assembly.
Do not disassemble the seat cushion assem-
bly.
4. Replace the air bag diagnosis sensor unit.
5. Replace the related harness.
WHIA0211E
Revision: April 20092010 QX56

B1017 – B1022 OCCUPANT CLASSIFICATION SYSTEM
SRC-69
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3.WIRING HARNESS
Is there any visible damage to the harness?
YES or NO
YES >> Replace the harness.
NO >> GO TO 4
4.DTC
Does CONSULT-III indicate B1022?
YES or NO
YES >> GO TO 6
NO >> GO TO 5
5.REPLACE RH FRONT SEAT BELT ASSEMBLY
Replace the RH front seat belt assembly.
>> GO TO 6
6.REPLACE RH FRONT SEAT CUSHION ASSEMBLY
Replace the RH front seat cushion assembly. Refer to SR-19, "
Removal and Installation".
>> GO TO 7
7.AIR BAG DIAGNOSIS SENSOR UNIT
Replace the air bag diagnosis sensor unit. Refer to SR-17, "
Removal and Installation".
>> END.
Revision: April 20092010 QX56

DIAGNOSIS SENSOR UNITSRC-71
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ECU DIAGNOSIS
DIAGNOSIS SENSOR UNIT
Wiring DiagramINFOID:0000000005147846
ABHWA0067GB
Revision: April 20092010 QX56

DIAGNOSIS SENSOR UNITSRC-81
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CONSULT-III name DTC DTC detecting condition Repair order
DRIVER AIRBAG MODULE [OPEN] B1049
Driver air bag module circuit (DR1) is
open
(including the spiral cable). 1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. Replace the driver air bag module.
4. Replace the spiral cable.
5. Replace the air bag diagnosis sensor unit.
6. Replace the related harness.
B1054 Driver air bag module circuit (DR2) is
open
(including the spiral cable).
DRIVER AIRBAG MODULE [VB-SHORT] B1050
Driver air bag module circuit (DR1) is
shorted to a power supply circuit
(including the spiral cable).
B1055 Driver air bag module circuit (DR2) is
shorted to a power supply circuit
(including the spiral cable).
DRIVER AIRBAG MODULE [GND-SHORT] B1051
Driver air bag module circuit (DR1) is
shorted to ground
(including the spiral cable).
B1056 Driver air bag module circuit (DR2) is
shorted to ground
(including the spiral cable).
DRIVER AIRBAG MODULE [SHORT] B1052
Driver air bag module circuits (DR1) are
shorted to each other
(including the spiral cable).
B1057 Driver air bag module circuits (DR2) are
shorted to each other
(including the spiral cable).
ASSIST A/B MODULE [OPEN] B1065
Front passenger air bag module circuit
(AS1) is open. 1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. Replace the front passenger air bag module.
4. Replace the air bag diagnosis sensor unit.
5. Replace the related harness.
B1070
Front passenger air bag module circuit
(AS2) is open.
ASSIST A/B MODULE [VB-SHORT] B1066
Front passenger air bag module circuit
(AS1) is shorted to a power supply cir-
cuit.
B1071 Front passenger air bag module circuit
(AS2) is shorted to a power supply cir-
cuit.
ASSIST A/B MODULE [GND-SHORT] B1067
Front passenger air bag module circuit
(AS1) is shorted to ground.
B1072 Front passenger air bag module circuit
(AS2) is shorted to ground.
ASSIST A/B MODULE [SHORT] B1068
Front passenger air bag module circuits
(AS1) are shorted to each other.
B1073 Front passenger air bag module circuits
(AS2) are shorted to each other.
SIDE MODULE LH [OPEN] B1134Front 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 the front LH seat back assembly.
4. Replace the air bag diagnosis sensor unit.
5. Replace the related harness.
SIDE MODULE LH
[VB-SHORT] B1135Front LH side air bag module circuit is
shorted to a power supply circuit.
SIDE MODULE LH [GND-SHORT] B1136
Front LH side air bag module circuit is
shorted to ground.
SIDE MODULE LH [SHORT] B1
1
37Front LH side air bag module circuits are
shorted to each other.
Revision: April 20092010 QX56

SRC-82
< ECU DIAGNOSIS >
DIAGNOSIS SENSOR UNIT
SIDE MODULE RH [OPEN] B1129Front 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 the front RH seat back assembly.
4. Replace the air bag diagnosis sensor unit.
5. Replace the related harness.
SIDE MODULE RH
[VB-SHORT] B1130Front RH side air bag module circuit is
shorted to a power supply circuit.
SIDE MODULE RH [GND-SHORT] B1131
Front RH side air bag module circuit is
shorted to ground.
SIDE MODULE RH [SHORT] B1132Front RH side air bag module circuits
are shorted to each other.
FR CURTN MODULE LH [OPEN] B1198LH side curtain air bag module (front)
circuit is open. 1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. Replace the LH side curtain air bag module.
4. Replace the air bag diagnosis sensor unit.
5. Replace the related harness.
FR CURTN MODULE LH
[VB-SHORT] B1199LH side curtain air bag module (front)
circuit is shorted to a power supply cir-
cuit.
FR CURTN MODULE LH [GND-SHORT] B1200LH side curtain air bag module (front)
circuit is shorted to ground.
FR CURTN MODULE LH [SHORT] B1201
LH side curtain air bag module (front)
circuits are shorted to each other.
FR CURTN MODULE RH [OPEN] B1193RH side curtain air bag module (front)
circuit is open. 1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. Replace the RH side curtain air bag module.
4. Replace the air bag diagnosis sensor unit.
5. Replace the related harness.
FR CURTN MODULE RH
[VB-SHORT] B1194RH side curtain air bag module (front)
circuit is shorted to a power supply cir-
cuit.
FR CURTN MODULE RH [GND-SHORT] B1195RH side curtain air bag module (front)
circuit is shorted to ground.
FR CURTN MODULE RH [SHORT] B1196RH side curtain air bag module (front)
circuits are shorted to each other.
CURTAIN MODULE LH [OPEN] B1150
LH side curtain air bag module (rear) cir-
cuit is open. 1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. Replace the LH side curtain air bag module.
4. Replace the air bag diagnosis sensor unit.
5. Replace the related harness.
CURTAIN MODULE LH
[VB-SHORT] B1151LH side curtain air bag module (rear) cir-
cuit is shorted to a power supply circuit.
CURTAIN MODULE LH [GND-SHORT] B1152LH side curtain air bag module (rear) cir-
cuit is shorted to ground.
CURTAIN MODULE LH [SHORT] B1153
LH side curtain air bag module (rear) cir-
cuits are shorted to each other.
CURTAIN MODULE RH [OPEN] B1
145 RH sid

e curtain air bag module (rear)
circuit is open. 1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. Replace the RH side curtain air bag module.
4. Replace the air bag diagnosis sensor unit.
5. Replace the related harness.
CURTAIN MODULE RH
[VB-SHORT] B1146RH side curtain air bag module (rear)
circuit is shorted to a power supply cir-
cuit.
CURTAIN MODULE RH [GND-SHORT] B1147
RH side curtain air bag module (rear)
circuit is shorted to ground.
CURTAIN MODULE RH [SHORT] B1148RH side curtain air bag module (rear)
circuits are shorted to each other.
PRE-TEN FRONT LH [OPEN] B1086LH seat belt pre-tensioner circuit is
open. 1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. Replace the front LH seat belt pre-tensioner.
4. Replace the air bag diagnosis sensor unit.
5. Replace the related harness.
PRE-TEN FRONT LH
[VB-SHORT] B1087
LH seat belt pre-tensioner circuit is
shorted to a power supply circuit.
PRE-TEN FRONT LH [GND-SHORT] B1088LH seat belt pre-tensioner circuit is
shorted to ground.
PRE-TEN FRONT LH [SHORT] B1089LH seat belt pre-tensioner circuits are
shorted to each other.
CONSULT-III name DTC
DTC detecting condition Repair order
Revision: April 20092010 QX56

DIAGNOSIS SENSOR UNITSRC-83
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PRE-TEN FRONT RH [OPEN] B1081RH seat belt pre-tensioner circuit is
open. 1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. Replace the front RH seat belt pre-tensioner.
4. Replace the air bag diagnosis sensor unit.
5. Replace the related harness.
PRE-TEN FRONT RH
[VB-SHORT] B1082RH seat belt pre-tensioner circuit is
shorted to a power supply circuit.
PRE-TEN FRONT RH [GND-SHORT] B1083
RH seat belt pre-tensioner circuit is
shorted to ground.
PRE-TEN FRONT RH [SHORT] B1084RH seat belt pre-tensioner circuits are
shorted to each other.
PRE-TEN2 FRONT LH [OPEN] B1182LH seat belt buckle pre-tensioner circuit
is open. 1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. Replace the front LH seat belt buckle pre-ten-
sioner.
4. Replace the air bag diagnosis sensor unit.
5. Replace the related harness.
PRE-TEN2 FRONT LH
[VB-SHORT] B1183
LH seat belt buckle pre-tensioner circuit
is shorted to a power supply circuit.
PRE-TEN2 FRONT LH [GND-SHORT] B1184LH seat belt buckle pre-tensioner circuit
is shorted to ground.
PRE-TEN2 FRONT LH [SHORT] B1185LH seat belt buckle pre-tensioner cir-
cuits are shorted to each other.
PRE-TEN2 FRONT RH [OPEN] B1177
RH seat belt buckle pre-tensioner circuit
is open. 1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. Replace the front RH seat belt buckle pre-ten-
sioner.
4. Replace the air bag diagnosis sensor unit.
5. Replace the related harness.
PRE-TEN2 FRONT RH
[VB-SHORT] B1178RH seat belt buckle pre-tensioner circuit
is shorted to a power supply circuit.
PRE-TEN2 FRONT RH [GND-SHORT] B1179RH seat belt buckle pre-tensioner circuit
is shorted to ground.
PRE-TEN2 FRONT RH [SHORT] B1180
RH seat belt buckle pre-tensioner cir-
cuits are shorted to each other.
CRASH ZONE SEN [UNIT FAIL] B1033 Crash zone sensor has malfunctioned. 1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. Replace the crash zone sensor.
4. Replace the air bag diagnosis sensor unit.
5. Replace the related harness.
B1034
CRASH ZONE SEN [COMM FAIL] B1035Crash zone sensor communication er-
ror.
SATELLITE SENS LH [UNIT FAIL] B1118 LH side air bag satellite sensor has mal-
functioned. 1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. Replace the LH side air bag satellite sensor.
4. Replace the air bag diagnosis sensor unit.
5. Replace the related harness.
B 111 9
SATELLITE SENS LH [COMM FAIL] B1120LH side air bag satellite sensor commu-
nication error.
SATELLITE SENS RH [UNIT FAIL] B1
1
13 RH side air bag satellite sensor has mal-
functioned. 1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. Replace the RH side air bag satellite sensor.
4. Replace the air bag diagnosis sensor unit.
5. Replace the related harness.
B 111 4
SATELLITE SENS RH [COMM FAIL] B 111 5RH side air bag satellite sensor commu-
nication error.
CONTROL UNIT B1XXX Air bag diagnosis sensor unit is malfunc-
tioning.
1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. Replace the air bag diagnosis sensor unit.
4. Replace the related harness.
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 the front passenger air bag OFF in-
dicator.
4. Replace the air bag diagnosis sensor unit.
5. Replace the related harness.
OCCUPANT SENS C/U [UNIT FAIL] B1017 The OCS control unit is malfunctioning. 1. Replace the RH front seat cushion assembly.
Do not disassemble the seat cushion assem-
bly.
B1020
B1021
OCCUPANT SENS [UNIT FAIL] B1018The OCS sensor is malfunctioning.
CONSULT-III name DTC
DTC detecting condition Repair order
Revision: April 20092010 QX56

SRC-84
< ECU DIAGNOSIS >
DIAGNOSIS SENSOR UNIT
Trouble Diagnosis without CONSULT-III
INFOID:0000000005147848
WARNING LAMP FLASH CODE CHART
NOTE:
Follow the procedures in numerical order when repairi ng malfunctioning parts. Confirm whether malfunction is
eliminated using air bag warning lamp each time repair is finished. If malfunction is still observed, proceed to
the next step. When malfunction is eliminated, fu rther repair work is not required.
BELT TENSION SENS
[UNIT FAIL] B1019The belt tension sensor is malfunction-
ing.
1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. Replace the RH front seat belt assembly.
4. Replace the RH front seat cushion assembly.
Do not disassemble the seat cushion assem-
bly.
5. Replace the related harness.
OCCUPANT SENS C/U [COMM FAIL] B1022Communication between the OCS con-
trol unit and the air bag diagnosis sensor
unit is interrupted.
1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. Replace the RH front seat cushion assembly.
Do not disassemble the seat cushion assem-
bly.
4. Replace the air bag diagnosis sensor unit.
5. Replace the related harness.
FRONTAL COLLISION DE- TECTION B1209Driver and/or front passenger air bag
modules are deployed. Refer to
SR-20
.
SIDE COLLISION DETEC- TION B1210Side and/or curtain air bag modules are
deployed. Refer to
SR-21
.
ROLLOVER DETECTION B1211 Curtain air bag module and seat belt
pre-tensioner are deployed.
CONSULT-III name DTC
DTC detecting condition Repair order
SHIA0026E
WHIA0260E
Revision: April 20092010 QX56

SRS AIR BAG SYSTEMSRC-89
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SYMPTOM DIAGNOSIS
SRS AIR BAG SYSTEM
"AIR BAG" Warning Lamp Does Not Turn OffINFOID:0000000005147849
DIAGNOSTIC PROCEDURE 7
1.CHECK CONDITION OF AIR BAG MODULE
Inspect for any deployed air bag modules or seat belt pre-tensioners.
Are any air bag modules or seat belt pre-tensioners deployed?
YES >> Refer to SR-20, "For Frontal Collision" or SR-21, "For Side and Rollover Collision".
NO >> GO TO 2
2.CHECK THE AIR BAG FUSE
Check 10A fuse [No. 13, locat ed in the fuse block (J/B)].
Is the fuse blown?
Yes >> GO TO 3
No >> GO TO 4
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 >> Replace harness.
NO >> Inspection End.
4.CHECK AIR BAG DIAGNOSIS SENSOR UNIT
Connect CONSULT-III.
Is
“AIR BAG” displayed on CONSULT-III?
YES >> GO TO 5
NO >> Visually inspect the air bag diagnosis sensor unit harness connections. If the connections are OK,
replace the air bag diagnosis sensor unit. Refer to SR-17, "
Removal and Installation".
5.CHECK HARNESS CONNECTION
Check for loose connections between the combination meter and the air bag diagnosis sensor unit.
Are there any loose connections?
Yes >> 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.
No >> Replace air bag diagnosis sensor unit.
"AIR BAG" Warning La mp Does Not Turn OnINFOID:0000000005147850
DIAGNOSTIC PROCEDURE 8
1.CHECK METER FUSE
Check the 10A fuse [No. 14, loca ted in the fuse block (J/B)] .
Is the fuse blown?
Yes >> GO TO 2
No >> GO TO 3
2.REPLACE METER FUSE AND CHECK AGAIN
Replace 10A fuse [No. 14, located in the fuse block (J/B)] and turn ignition switch ON.
Does the fuse blow again?
Yes >> Replace harness.
No >> Inspection End.
3.CHECK HARNESS CONNECTIONS BETWEEN AIR BAG DIAGNOSIS SENSOR UNIT AND COMBINA-
Revision: April 20092010 QX56