2011 INFINITI QX56 sensor

SR-26
< REMOVAL AND INSTALLATION >
DIAGNOSIS SENSOR UNIT
DIAGNOSIS SENSOR UNIT
Exploded ViewINFOID:0000000006113065
Removal and InstallationINFOID:0000000006113066
WARNING:
 Before servicing, turn ignition switch OFF, disconnect battery ne gative terminal and wait 3 minutes
or more.
 Before disconnecting the air bag diagnosis sensor unit harness conn ectors, be sure to disconnect
the each harness connector of the air bag module and seat belt pre-tensioner to prevent air bag
deployment by static electricity and seat belt pre-tensioner operation.
 Never use the air tools or electric tools for servicing.
 When replacing the air bag diagno sis sensor unit, always check with th e parts department for the lat-
est parts information. Installing an incorrect air bag diagnosis sen sor unit may or may not cause the
air bag warning lamp to illuminate and may cause in correct deployment of the supplemental air bags
and seat belt pre-tensioners in a collision r esulting in serious personal injury or death.
REMOVAL
1. Always check the air bag diagnosis sensor unit E CU discriminated number (identification number) using
CONSULT-III.
2. Disconnect the each connector of all air bag modules and pre-tensioner seat belts.
3. Remove the console finisher assembly. Refer to IP-25, "
Removal and Installation".
4. Remove the diagnosis sensor unit fixing bolts, ground bolt, and then remove diagnosis sensor unit.
5. Disconnect the diagnosis sensor unit harness connector.
1. Diagnosis sensor unit
Refer to GI-4, "
Components" for symbols in the figure.
JMHIA1478GB
Revision: 2010 May2011 QX56

DIAGNOSIS SENSOR UNITSR-27
< REMOVAL AND INSTALLATION >
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CAUTION:
 Never impact the diagnosis sensor unit.
 Replace the diagnosis sensor uni t if it has been dropped or
sustained an impact.
 Replace the diagnosis sensor unit of deployed SRS air bag and deployed front seat belt pre-ten-
sioner.
INSTALLATION
Install in the revers order of removal.
CAUTION:
 Never use the old fixing bolts afte r removal, replace with the new bolts.
 Never damage the harness co nnector while installing.
 If malfunction is detected by the air bag warnin g lamp, after repair or replacement of the malfunc-
tioning parts, reset the memory using sel f-diagnosis or CONSULT-III. Refer to SRC-14, "
On Board
Diagnosis Function" or SRC-19, "CONSULT-III Function".
 After the work is completed, check that no system malfunction is detected by air bag warning lamp.
 After replacing the air bag diag nosis sensor unit, confirm using CO NSULT-III that the ECU discrimi-
nated number (identification nu mber) of the new replacement air bag sensor unit matches the ECU
discriminated number (identification number) of the replaced (old) air bag diagnosis sensor unit.
NOTE:
If the ECU discriminated number of the new replacement air bag diagnosis sensor unit differs from the ECU
discriminated number of the replaced air bag diagnosis sens or unit, reconfirm the parts information and verify
that the correct air bag diagnosis sensor unit was installed.
JMHIA0009ZZ
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SRC-1
RESTRAINTS
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SECTION SRC
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CONTENTS
SRS AIRBAG CONTROL SYSTEM
PRECAUTION ................ ...............................6
PRECAUTIONS .............................................. .....6
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
6
Service ......................................................................6
SYSTEM DESCRIPTION ..............................8
COMPONENT PARTS ................................... .....8
Component Parts Location .................................. ......8
Component Description .............................................9
SYSTEM .............................................................11
System Diagram .................................................. ....11
System Description .................................................12
DIAGNOSIS SYSTEM (AIR BAG) .....................14
Description .......................................................... ....14
On Board Diagnosis Function .................................14
CONSULT-III Function ............................................19
DIAGNOSIS SYSTEM (OCCUPANT DETEC-
TION SYSTEM) .............................................. ....
21
CONSULT-III Function ........................................ ....21
ECU DIAGNOSIS INFORMATION ..............22
DIAGNOSIS SENSOR UNIT .......................... ....22
DTC Index .......................................................... ....22
WIRING DIAGRAM ......................................27
SRS AIR BAG SYSTEM ................................. ....27
Wiring Diagram ................................................... ....27
BASIC INSPECTION ...................................36
DIAGNOSIS AND REPAIR WORK FLOW .... ....36
Work Flow ........................................................... ....36
INSPECTION AND ADJUSTMENT ....................39
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT .................................................... ....
39
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Description .................................
39
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Special Repair Requirement ......
39
ZERO POINT RESET ............................................. ....39
ZERO POINT RESET : Description .........................39
ZERO POINT RESET : Special Repair Require-
ment .........................................................................
39
DTC/CIRCUIT DIAGNOSIS .........................41
B1001, B1002, B1003, B1004, B1005 DIAG-
NOSIS SENSOR UNIT ......................................
41
DTC Logic ............................................................ ....41
Diagnosis Procedure ...............................................41
B1006, B1007, B1008, B1009, B1010 DIAG-
NOSIS SENSOR UNIT ......................................
42
DTC Logic ................................................................42
Diagnosis Procedure ...............................................42
B1011, B1012, B1013, B1014, B1015 DIAG-
NOSIS SENSOR UNIT ......................................
43
DTC Logic ................................................................43
Diagnosis Procedure ...............................................43
B1017, B1020, B1021 OCCUPANT SENS C/U
...
44
Description ........................................................... ....44
DTC Logic ................................................................44
Diagnosis Procedure ...............................................44
B1018 OCCUPANT SENS ................................46
Description ........................................................... ....46
DTC Logic ................................................................46
Diagnosis Procedure ...............................................46
B1022 OCCUPANT SENS C/U .........................48
Description ...............................................................48
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SRC-2
DTC Logic ...............................................................48
Diagnosis Procedure ..............................................48
B1023 PASS A/B INDCTR CKT ........................50
Description ........................................................... ...50
DTC Logic ...............................................................50
Diagnosis Procedure ..............................................50
B1025, B1032, B1048 OCS SENSOR ...............52
Description ........................................................... ...52
DTC Logic ...............................................................52
Diagnosis Procedure ..............................................52
B1026, B1027, B1028, B1029, B1030, B1031
DIAGNOSIS SENSOR UNIT ..............................
54
DTC Logic ............................................................ ...54
Diagnosis Procedure ..............................................54
B1033, B1034 CRASH ZONE SENSOR ...........55
DTC Logic ............................................................ ...55
Diagnosis Procedure ..............................................55
B1035 CRASH ZONE SENSOR ........................57
DTC Logic ............................................................ ...57
Diagnosis Procedure ..............................................57
B1036 CRASH ZONE SENSOR ........................59
DTC Logic ............................................................ ...59
Diagnosis Procedure ..............................................59
B1037, B1039, B1041 CRASH ZONE SEN-
SOR ....................................................................
60
DTC Logic ............................................................ ...60
Diagnosis Procedure ..............................................60
B1042, B1043, B1044, B1045, B1046, B1047
DIAGNOSIS SENSOR UNIT ..............................
62
DTC Logic ............................................................ ...62
Diagnosis Procedure ..............................................62
B1049, B1054 DRIVER AIR BAG MODULE .....63
DTC Logic ............................................................ ...63
Diagnosis Procedure ..............................................63
B1050, B1055 DRIVER AIR BAG MODULE .....65
DTC Logic ............................................................ ...65
Diagnosis Procedure ..............................................65
B1051, B1056 DRIVER AIR BAG MODULE .....67
DTC Logic ............................................................ ...67
Diagnosis Procedure ..............................................67
B1052, B1057 DRIVER AIR BAG MODULE .....69
DTC Logic ............................................................ ...69
Diagnosis Procedure ..............................................69
B1058, B1059, B1060, B1061, B1062, B1063
DIAGNOSIS SENSOR UNIT ..............................
71
DTC Logic ............................................................ ...71
Diagnosis Procedure ..............................................71
B1065, B1070 PASSENGER AIR BAG MOD-
ULE ....................................................................
72
DTC Logic ............................................................ ...72
Diagnosis Procedure ...............................................72
B1066, B1071 PASSENGER AIR BAG MOD-
ULE ....................................................................
74
DTC Logic ............................................................ ...74
Diagnosis Procedure ...............................................74
B1067, B1072 PASSENGER AIR BAG MOD-
ULE ....................................................................
76
DTC Logic ............................................................ ...76
Diagnosis Procedure ...............................................76
B1068, B1073 PASSENGER AIR BAG MOD-
ULE ....................................................................
78
DTC Logic ............................................................ ...78
Diagnosis Procedure ...............................................78
B1074, B1075, B1076, B1077, B1078, B1079
DIAGNOSIS SENSOR UNIT .............................
80
DTC Logic ............................................................ ...80
Diagnosis Procedure ...............................................80
B1080, B1096 DRIVER AIR BAG MODULE .....81
DTC Logic ............................................................ ...81
Diagnosis Procedure ...............................................81
B1081 SEAT BELT PRE-TENSIONER RH .......83
DTC Logic ............................................................ ...83
Diagnosis Procedure ...............................................83
B1082 SEAT BELT PRE-TENSIONER RH .......85
DTC Logic ............................................................ ...85
Diagnosis Procedure ...............................................85
B1083 SEAT BELT PRE-TENSIONER RH .......87
DTC Logic ............................................................ ...87
Diagnosis Procedure ...............................................87
B1084 SEAT BELT PRE-TENSIONER RH .......89
DTC Logic ............................................................ ...89
Diagnosis Procedure ...............................................89
B1086 SEAT BELT PRE-TENSIONER LH .......91
DTC Logic ............................................................ ...91
Diagnosis Procedure ...............................................91
B1087 SEAT BELT PRE-TENSIONER LH .......93
DTC Logic ............................................................ ...93
Diagnosis Procedure ...............................................93
B1088 SEAT BELT PRE-TENSIONER LH .......95
DTC Logic ............................................................ ...95
Diagnosis Procedure ...............................................95
B1089 SEAT BELT PRE-TENSIONER LH .......97
DTC Logic ............................................................ ...97
Diagnosis Procedure ...............................................97
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SRC-3
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B1090, B1091, B1092, B1093, B1094, B1095
DIAGNOSIS SENSOR UNIT .......................... ....
99
DTC Logic ........................................................... ....99
Diagnosis Procedure ...............................................99
B1106, B1107, B1108, B1109, B1110, B1111
DIAGNOSIS SENSOR UNIT ............................
100
DTC Logic ........................................................... ..100
Diagnosis Procedure .............................................100
B1113, B1114 SATELLITE SENSOR RH ........101
DTC Logic ........................................................... ..101
Diagnosis Procedure .............................................101
B1115 SATELLITE SENSOR RH ....................103
DTC Logic ........................................................... ..103
Diagnosis Procedure .............................................103
B1116 SATELLITE SENSOR RH ....................105
DTC Logic ........................................................... ..105
Diagnosis Procedure .............................................105
B1118, B1119 SATELLITE SENSOR LH ........106
DTC Logic ........................................................... ..106
Diagnosis Procedure .............................................106
B1120 SATELLITE SENSOR LH .....................108
DTC Logic ........................................................... ..108
Diagnosis Procedure .............................................108
B1121 SATELLITE SENSOR LH .....................110
DTC Logic ........................................................... ..110
Diagnosis Procedure .............................................110
B1122, B1123, B1124, B1125, B1126, B1127
DIAGNOSIS SENSOR UNIT ............................
111
DTC Logic ........................................................... ..111
Diagnosis Procedure .............................................111
B1129 SIDE AIR BAG MODULE RH ...............112
DTC Logic ........................................................... ..112
Diagnosis Procedure .............................................112
B1130 SIDE AIR BAG MODULE RH ...............114
DTC Logic ........................................................... ..114
Diagnosis Procedure .............................................114
B1131 SIDE AIR BAG MODULE RH ...............116
DTC Logic ........................................................... ..116
Diagnosis Procedure .............................................116
B1132 SIDE AIR BAG MODULE RH ...............118
DTC Logic ........................................................... ..118
Diagnosis Procedure .............................................118
B1134 SIDE AIR BAG MODULE LH ...............120
DTC Logic ........................................................... ..120
Diagnosis Procedure .............................................120
B1135 SIDE AIR BAG MODULE LH ...............122
DTC Logic ........................................................... ..122
Diagnosis Procedure .............................................122
B1136 SIDE AIR BAG MODULE LH ..............124
DTC Logic ............................................................ ..124
Diagnosis Procedure .............................................124
B1137 SIDE AIR BAG MODULE LH ..............126
DTC Logic ..............................................................126
Diagnosis Procedure .............................................126
B1138, B1139, B1140, B1141, B1142, B1143
DIAGNOSIS SENSOR UNIT ...........................
128
DTC Logic ..............................................................128
Diagnosis Procedure .............................................128
B1144 DIAGNOSIS SENSOR UNIT ...............129
DTC Logic ..............................................................129
Diagnosis Procedure .............................................129
B1145 CURTAIN AIR BAG MODULE RH ......130
DTC Logic ..............................................................130
Diagnosis Procedure .............................................130
B1146 CURTAIN AIR BAG MODULE RH ......132
DTC Logic ..............................................................132
Diagnosis Procedure .............................................132
B1147 CURTAIN AIR BAG MODULE RH ......134
DTC Logic ..............................................................134
Diagnosis Procedure .............................................134
B1148 CURTAIN AIR BAG MODULE RH ......136
DTC Logic ..............................................................136
Diagnosis Procedure .............................................136
B1150 CURTAIN AIR BAG MODULE LH ......138
DTC Logic ..............................................................138
Diagnosis Procedure .............................................138
B1151 CURTAIN AIR BAG MODULE LH ......140
DTC Logic ..............................................................140
Diagnosis Procedure .............................................140
B1152 CURTAIN AIR BAG MODULE LH ......142
DTC Logic ..............................................................142
Diagnosis Procedure .............................................142
B1153 CURTAIN AIR BAG MODULE LH ......144
DTC Logic ..............................................................144
Diagnosis Procedure .............................................144
B1154, B1155, B1156, B1157, B1158, B1159
DIAGNOSIS SENSOR UNIT ...........................
146
DTC Logic ..............................................................146
Diagnosis Procedure .............................................146
B1170, B1171, B1172, B1173, B1174, B1175
DIAGNOSIS SENSOR UNIT ...........................
147
DTC Logic ..............................................................147
Diagnosis Procedure .............................................147
B1177 LAP PRE-TENSIONER RH .................148
DTC Logic ..............................................................148
Diagnosis Procedure .............................................148
Revision: 2010 May2011 QX56

SRC-4
B1178 LAP PRE-TENSIONER RH ..................149
DTC Logic ............................................................ ..149
Diagnosis Procedure .............................................149
B1179 LAP PRE-TENSIONER RH ..................150
DTC Logic ............................................................ ..150
Diagnosis Procedure .............................................150
B1180 LAP PRE-TENSIONER RH ..................151
DTC Logic ............................................................ ..151
Diagnosis Procedure .............................................151
B1182 LAP PRE-TENSIONER LH ..................152
DTC Logic ............................................................ ..152
Diagnosis Procedure .............................................152
B1183 LAP PRE-TENSIONER LH ..................153
DTC Logic ............................................................ ..153
Diagnosis Procedure .............................................153
B1184 LAP PRE-TENSIONER LH ..................154
DTC Logic ............................................................ ..154
Diagnosis Procedure .............................................154
B1185 LAP PRE-TENSIONER LH ..................155
DTC Logic ............................................................ ..155
Diagnosis Procedure .............................................155
B1186, B1187, B1188, B1189, B1190, B1191
DIAGNOSIS SENSOR UNIT ............................
156
DTC Logic ............................................................ ..156
Diagnosis Procedure .............................................156
B1193 CURTAIN AIR BAG MODULE RH .......157
DTC Logic ............................................................ ..157
Diagnosis Procedure .............................................157
B1194 CURTAIN AIR BAG MODULE RH .......159
DTC Logic ............................................................ ..159
Diagnosis Procedure .............................................159
B1195 CURTAIN AIR BAG MODULE RH .......161
DTC Logic ............................................................ ..161
Diagnosis Procedure .............................................161
B1196 CURTAIN AIR BAG MODULE RH .......163
DTC Logic ............................................................ ..163
Diagnosis Procedure .............................................163
B1198 CURTAIN AIR BAG MODULE LH .......165
DTC Logic ............................................................ ..165
Diagnosis Procedure .............................................165
B1199 CURTAIN AIR BAG MODULE LH .......167
DTC Logic ............................................................ ..167
Diagnosis Procedure .............................................167
B1200 CURTAIN AIR BAG MODULE LH .......169
DTC Logic ............................................................ ..169
Diagnosis Procedure .............................................169
B1201 CURTAIN AIR BAG MODULE LH ........171
DTC Logic ............................................................ .171
Diagnosis Procedure .............................................171
B1202, B1203, B1204, B1205, B1206, B1207
DIAGNOSIS SENSOR UNIT ............................
173
DTC Logic ............................................................ .173
Diagnosis Procedure .............................................173
B1209 FRONTAL COLLISION DETECTION ...174
Description ........................................................... .174
DTC Logic .............................................................174
Diagnosis Procedure .............................................174
B1210 SIDE COLLISION DETECTION ............175
Description ........................................................... .175
DTC Logic .............................................................175
Diagnosis Procedure .............................................175
B1211 ROLLOVER DETECTION .....................176
Description ........................................................... .176
DTC Logic .............................................................176
Diagnosis Procedure .............................................176
B1212, B1213, B1214 SATELLITE SENSOR
RH .....................................................................
177
DTC Logic ............................................................ .177
Diagnosis Procedure .............................................177
B1215, B1216, B1217 SATELLITE SENSOR
LH .....................................................................
179
DTC Logic ............................................................ .179
Diagnosis Procedure .............................................179
B1218, B1219, B1220, B1221, B1222, B1223
DIAGNOSIS SENSOR UNIT ............................
181
DTC Logic ............................................................ .181
Diagnosis Procedure .............................................181
B1234, B1235, B1236, B1237, B1238, B1239
DIAGNOSIS SENSOR UNIT ............................
182
DTC Logic ............................................................ .182
Diagnosis Procedure .............................................182
B1304 SATELLITE SEN RH ............................183
DTC Logic ............................................................ .183
Diagnosis Procedure .............................................183
B1306, B1308, B1309, B1310 SATELLITE
SEN RH .............................................................
185
DTC Logic ............................................................ .185
Diagnosis Procedure .............................................185
B1307 SATELLITE SEN RH ............................187
DTC Logic ............................................................ .187
Diagnosis Procedure .............................................187
B1311 SATELLITE SEN LH .............................188
DTC Logic ............................................................ .188
Diagnosis Procedure .............................................188
Revision: 2010 May2011 QX56

SRC-6
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006219946
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.
WARNING:
• To avoid rendering the SRS inopera tive, which could increase the risk of personal injury or death in
the event of a collision that would result in air bag inflation, all maintenance must be performed by
an authorized NISS AN/INFINITI dealer.
 Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the “SRS AIR BAG”.
 Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
 When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the ignition ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s)
with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly
causing serious injury.
 When using air or electric power tools or hammers , always switch the ignition OFF, disconnect the
battery, and wait at least 3 minu tes before performing any service.
ServiceINFOID:0000000006219947
 Never use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
 Before servicing the SRS, turn ignition switch OF F, disconnect battery negative terminal and wait 3 minutes
or more.
For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-
tensioner to deploy. Therefore, never work on any SR S connectors or wires until at least 3 minutes have
passed.
 Diagnosis sensor unit must always be installed with their arrow marks “ ⇐” pointing towards the front of the
vehicle for proper operation. Also chec k diagnosis sensor unit for cracks, deformities or rust before installa-
tion and replace as required.
 The spiral cable must be aligned with the neutral position since its rotations are limited. Never turn steering
wheel and column after removal of steering gear.
 Handle air bag module carefully. Always place driver and front passenger air bag modules with the pad side facing upward and seat mounted front side air bag module standing with the stud bolt side facing down.
 Conduct self-diagnosis to check entire SRS for proper function after replacing any components.
 After air bag inflates, the front instrument panel assembly should be replaced if damaged.
 Always replace instrument panel pad following front passenger air bag deployment.
 Never solder the harness when making repairs. Check that harness is not pinched and that there is no con-
tact with other components.
 Never allow harness to come in contact with oil, grease, waste oil, or water.
 Never insert foreign materials, such as a screwdriver , into the harness connector. (This is to prevent acci-
dental activation caused by static electricity.)
 Always use CONSULT-III or SRS air bag warning lamp to perform the circuit diagnosis. (Never use an elec- tric tester such as a circuit tester.)
 Never enter in the deployment area of the pop-up roll bar. Never put an object in the deployment area of the
pop-up roll bar. (This is to prevent injury in case of an unintentional deployment.)
Revision: 2010 May2011 QX56

SRC-8
< SYSTEM DESCRIPTION >
COMPONENT PARTS
SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts LocationINFOID:0000000006219948
1. Driver air bag module 2. Combination meter 3. Front passenger air bag off indicator
4. Passenger air bag module 5. Seat belt pre-tensioner 6. Front satellite sensor
7. Side air bag module 8. Rear satellite sensor 9. Rear curtain air bag module
10. Front curtain air bag module 11. Lap pre-tensioner 12. Air bag diagnosis sensor unit
JMHIA1650ZZ
Revision: 2010 May2011 QX56