ECU INFINITI QX56 2009 Factory Service Manual

DIAGNOSIS SENSOR UNITSRC-77
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ABHIA0013GB
Revision: December 20092009 QX56

SRC-78
< ECU DIAGNOSIS >
DIAGNOSIS SENSOR UNIT
ABHIA0014GB
Revision: December 20092009 QX56

DIAGNOSIS SENSOR UNITSRC-79
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ABHIA0015GB
Revision: December 20092009 QX56

SRC-80
< ECU DIAGNOSIS >
DIAGNOSIS SENSOR UNIT
ABHIA0016GB
Revision: December 20092009 QX56

DIAGNOSIS SENSOR UNITSRC-81
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Trouble Diagnosis with CONSULT-IIIINFOID:0000000003775247
DIAGNOSTIC CODE CHART
NOTE:
Follow the procedures in numerical order when repairi ng malfunctioning parts. Confirm whether malfunction is
eliminated using air bag warning lamp or CONSULT-III eac h time repair is finished. If malfunction is still
observed, proceed to the next step. When malfunction is elim inated, further repair work is not required.
ABHIA0017GB
Revision: December 20092009 QX56

SRC-82
< ECU DIAGNOSIS >
DIAGNOSIS SENSOR UNIT
CONSULT-III name DTCDTC 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 [SHOR

T] B1137Front LH side air bag module circuits are
shorted to each other.
Revision: December 20092009 QX56

DIAGNOSIS SENSOR UNITSRC-83
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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] B1145
RH side curtain air bag module (rear)
circuit is open. 1.
V
isually 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: December 20092009 QX56

SRC-84
< ECU DIAGNOSIS >
DIAGNOSIS SENSOR UNIT
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: December 20092009 QX56

DIAGNOSIS SENSOR UNITSRC-85
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Trouble Diagnosis without CONSULT-IIIINFOID:0000000003775248
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-22
.
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: December 20092009 QX56

SRC-86
< ECU DIAGNOSIS >
DIAGNOSIS SENSOR UNIT
WHIA0198E
WHIA0261E
WHIA0200E
WHIA0262E
WHIA0263E
Revision: December 20092009 QX56