Murano Cross Cabriolet Z51 (2012 year). Manual - part 85

OCCUPANT CLASSIFICATION SYSTEM CONTROL UNIT

SR-33

< REMOVAL AND INSTALLATION >

OCCUPANT CLASSIFICATION SYSTEM CONTROL UNIT

Removal and Installation

INFOID:0000000007566550

For removal and installation

The occupant classification system control unit and seat sensor mat are an integral part of the front passenger
seat cushion and are replaced as an assembly. Refer to

SE-39, "Removal and Installation"

Revision: 2013 February

2012 Murano CrossCabriolet

SRC-1

RESTRAINTS

SECTION

SRC

SRC

CONTENTS

SRS AIRBAG CONTROL SYSTEM

PRECAUTION ...............................................

PRECAUTIONS ...................................................

Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...................................................................

Precaution for Battery Service ..................................

Service Procedure Precautions for Models with a
Pop-up Roll Bar .........................................................

SYSTEM DESCRIPTION ..............................

COMPONENT PARTS ........................................

Component Parts Location ........................................

Component Description .............................................

SYSTEM .............................................................

System Diagram ......................................................

System Description .................................................

DIAGNOSIS SYSTEM (AIR BAG) .....................

Description ..............................................................

On Board Diagnosis Function .................................

CONSULT Function ................................................

ECU DIAGNOSIS INFORMATION ..............

DIAGNOSIS SENSOR UNIT ..............................

DTC Index ..............................................................

WIRING DIAGRAM ......................................

SRS AIR BAG SYSTEM .....................................

Wiring Diagram .......................................................

BASIC INSPECTION ...................................

DIAGNOSIS AND REPAIR WORK FLOW ........

Work Flow ...............................................................

DTC/CIRCUIT DIAGNOSIS .........................

B1001, B1002, B1003, B1004, B1005 DIAG-
NOSIS SENSOR UNIT ......................................

DTC Logic ................................................................

Diagnosis Procedure ...............................................

B1006, B1007, B1008, B1009, B1010 DIAG-
NOSIS SENSOR UNIT ......................................

DTC Logic ................................................................

Diagnosis Procedure ...............................................

B1011, B1012, B1013, B1014, B1015 DIAG-
NOSIS SENSOR UNIT ......................................

DTC Logic ................................................................

Diagnosis Procedure ...............................................

B1017, B1020, B1021 OCCUPANT SENS C/U

...

DTC Logic ................................................................

Diagnosis Procedure ...............................................

B1018 OCCUPANT SENS ................................

DTC Logic ................................................................

Diagnosis Procedure ...............................................

B1022 OCCUPANT SENS C/U .........................

DTC Logic ................................................................

Diagnosis Procedure ...............................................

B1023 PASSENGER AIR BAG OFF INDICA-
TOR ...................................................................

DTC Logic ................................................................

Diagnosis Procedure ...............................................

B1025, B1032, B1048 OCS SENSOR ..............

DTC Logic ................................................................

Diagnosis Procedure ...............................................

B1026, B1027, B1028, B1029, B1030, B1031
DIAGNOSIS SENSOR UNIT .............................

DTC Logic ................................................................

Diagnosis Procedure ...............................................

Revision: 2013 February

2012 Murano CrossCabriolet

SRC-2

B1033, B1034 CRASH ZONE SENSOR ...........

DTC Logic ...............................................................

Diagnosis Procedure ..............................................

B1035 CRASH ZONE SENSOR ........................

DTC Logic ...............................................................

Diagnosis Procedure ..............................................

B1036 CRASH ZONE SENSOR ........................

DTC Logic ...............................................................

Diagnosis Procedure ..............................................

B1037, B1039, B1041 CRASH ZONE SEN-
SOR ....................................................................

DTC Logic ...............................................................

Diagnosis Procedure ..............................................

B1042, B1043, B1044, B1045, B1046, B1047
DIAGNOSIS SENSOR UNIT ..............................

DTC Logic ...............................................................

Diagnosis Procedure ..............................................

B1049, B1054 DRIVER AIR BAG MODULE .....

DTC Logic ...............................................................

Diagnosis Procedure ..............................................

B1050, B1055 DRIVER AIR BAG MODULE .....

DTC Logic ...............................................................

Diagnosis Procedure ..............................................

B1051, B1056 DRIVER AIR BAG MODULE .....

DTC Logic ...............................................................

Diagnosis Procedure ..............................................

B1052, B1057 DRIVER AIR BAG MODULE .....

DTC Logic ...............................................................

Diagnosis Procedure ..............................................

B1058, B1059, B1060, B1061, B1062, B1063
DIAGNOSIS SENSOR UNIT ..............................

DTC Logic ...............................................................

Diagnosis Procedure ..............................................

B1065, B1070 PASSENGER AIR BAG MOD-
ULE ....................................................................

DTC Logic ...............................................................

Diagnosis Procedure ..............................................

B1066, B1071 PASSENGER AIR BAG MOD-
ULE ....................................................................

DTC Logic ...............................................................

Diagnosis Procedure ..............................................

B1067, B1072 PASSENGER AIR BAG MOD-
ULE ....................................................................

DTC Logic ...............................................................

Diagnosis Procedure ..............................................

B1068, B1073 PASSENGER AIR BAG MOD-
ULE ....................................................................

DTC Logic ...............................................................

Diagnosis Procedure ...............................................

B1074, B1075, B1076, B1077, B1078, B1079
DIAGNOSIS SENSOR UNIT .............................

DTC Logic ...............................................................

Diagnosis Procedure ...............................................

B1080, B1096 DRIVER AIR BAG MODULE .....

DTC Logic ...............................................................

Diagnosis Procedure ...............................................

B1081 SEAT BELT PRE-TENSIONER RH .......

DTC Logic ...............................................................

Diagnosis Procedure ...............................................

B1082 SEAT BELT PRE-TENSIONER RH .......

DTC Logic ...............................................................

Diagnosis Procedure ...............................................

B1083 SEAT BELT PRE-TENSIONER RH .......

DTC Logic ...............................................................

Diagnosis Procedure ...............................................

B1084 SEAT BELT PRE-TENSIONER RH .......

DTC Logic ...............................................................

Diagnosis Procedure ...............................................

B1086 SEAT BELT PRE-TENSIONER LH .......

DTC Logic ...............................................................

Diagnosis Procedure ...............................................

B1087 SEAT BELT PRE-TENSIONER LH .......

DTC Logic ...............................................................

Diagnosis Procedure ...............................................

B1088 SEAT BELT PRE-TENSIONER LH .......

DTC Logic ...............................................................

Diagnosis Procedure ...............................................

B1089 SEAT BELT PRE-TENSIONER LH .......

DTC Logic ...............................................................

Diagnosis Procedure ...............................................

B1090, B1091, B1092, B1093, B1094, B1095
DIAGNOSIS SENSOR UNIT .............................

DTC Logic ...............................................................

Diagnosis Procedure ...............................................

B1106, B1107, B1108, B1109, B1110, B1111
DIAGNOSIS SENSOR UNIT .............................

DTC Logic ...............................................................

Diagnosis Procedure ...............................................

B1113, B1114 SATELLITE SENSOR RH .........

DTC Logic ...............................................................

Diagnosis Procedure ...............................................

B1115 SATELLITE SENSOR RH ......................

DTC Logic ...............................................................

Diagnosis Procedure ...............................................

B1116 SATELLITE SENSOR RH ......................

Revision: 2013 February

2012 Murano CrossCabriolet

SRC-3

SRC

DTC Logic ...............................................................

Diagnosis Procedure ...............................................

B1118, B1119 SATELLITE SENSOR LH ..........

DTC Logic ...............................................................

Diagnosis Procedure ...............................................

B1120 SATELLITE SENSOR LH .......................

DTC Logic ...............................................................

Diagnosis Procedure ...............................................

B1121 SATELLITE SENSOR LH .......................

DTC Logic ...............................................................

Diagnosis Procedure ...............................................

B1122, B1123, B1124, B1125, B1126, B1127
DIAGNOSIS SENSOR UNIT ..............................

DTC Logic ...............................................................

Diagnosis Procedure ...............................................

B1129 SIDE AIR BAG MODULE RH ...............

100

DTC Logic .............................................................

100

Diagnosis Procedure .............................................

100

B1130 SIDE AIR BAG MODULE RH ...............

102

DTC Logic .............................................................

102

Diagnosis Procedure .............................................

102

B1131 SIDE AIR BAG MODULE RH ...............

104

DTC Logic .............................................................

104

Diagnosis Procedure .............................................

104

B1132 SIDE AIR BAG MODULE RH ...............

106

DTC Logic .............................................................

106

Diagnosis Procedure .............................................

106

B1134 SIDE AIR BAG MODULE LH ...............

108

DTC Logic .............................................................

108

Diagnosis Procedure .............................................

108

B1135 SIDE AIR BAG MODULE LH ...............

110

DTC Logic .............................................................

110

Diagnosis Procedure .............................................

110

B1136 SIDE AIR BAG MODULE LH ...............

112

DTC Logic .............................................................

112

Diagnosis Procedure .............................................

112

B1137 SIDE AIR BAG MODULE LH ...............

114

DTC Logic .............................................................

114

Diagnosis Procedure .............................................

114

B1138, B1139, B1140, B1141, B1142, B1143
DIAGNOSIS SENSOR UNIT ............................

116

DTC Logic .............................................................

116

Diagnosis Procedure .............................................

116

B1144 DIAGNOSIS SENSOR UNIT .................

117

DTC Logic .............................................................

117

Diagnosis Procedure .............................................

117

B1154, B1155, B1156, B1157, B1158, B1159
DIAGNOSIS SENSOR UNIT ...........................

118

DTC Logic ..............................................................

118

Diagnosis Procedure .............................................

118

B1170, B1171, B1172, B1173, B1174, B1175
DIAGNOSIS SENSOR UNIT ...........................

119

DTC Logic ..............................................................

119

Diagnosis Procedure .............................................

119

B1186, B1187, B1188, B1189, B1190, B1191
DIAGNOSIS SENSOR UNIT ...........................

120

DTC Logic ..............................................................

120

Diagnosis Procedure .............................................

120

B1202, B1203, B1204, B1205, B1206, B1207
DIAGNOSIS SENSOR UNIT ...........................

121

DTC Logic ..............................................................

121

Diagnosis Procedure .............................................

121

B1209 FRONTAL COLLISION DETECTION ..

122

Description .............................................................

122

DTC Logic ..............................................................

122

Diagnosis Procedure .............................................

122

B1210 SIDE COLLISION DETECTION ..........

123

Description .............................................................

123

DTC Logic ..............................................................

123

Diagnosis Procedure .............................................

123

B1211 ROLLOVER DETECTION ...................

124

Description .............................................................

124

DTC Logic ..............................................................

124

Diagnosis Procedure .............................................

124

B1212, B1213, B1214 SATELLITE SENSOR
RH ....................................................................

125

DTC Logic ..............................................................

125

Diagnosis Procedure .............................................

125

B1215, B1216, B1217 SATELLITE SENSOR
LH ....................................................................

127

DTC Logic ..............................................................

127

Diagnosis Procedure .............................................

127

B1218, B1219, B1220, B1221, B1222, B1223
DIAGNOSIS SENSOR UNIT ...........................

129

DTC Logic ..............................................................

129

Diagnosis Procedure .............................................

129

B1234, B1235, B1236, B1237, B1238, B1239
DIAGNOSIS SENSOR UNIT ...........................

130

DTC Logic ..............................................................

130

Diagnosis Procedure .............................................

130

B1250, B1251, B1252, B1253, B1254, B1255
DIAGNOSIS SENSOR UNIT ...........................

131

DTC Logic ..............................................................

131

Diagnosis Procedure .............................................

131

Revision: 2013 February

2012 Murano CrossCabriolet

SRC-4

B1257 DOOR-MOUNTED CURTAIN AIR BAG
MODULE RH ....................................................

132

Description .............................................................

132

DTC Logic ..............................................................

132

Diagnosis Procedure .............................................

132

B1258 DOOR-MOUNTED CURTAIN AIR BAG
MODULE RH ....................................................

134

Description .............................................................

134

DTC Logic ..............................................................

134

Diagnosis Procedure .............................................

134

B1259 DOOR-MOUNTED CURTAIN AIR BAG
MODULE RH ....................................................

136

Description .............................................................

136

DTC Logic ..............................................................

136

Diagnosis Procedure .............................................

136

B1260 DOOR-MOUNTED CURTAIN AIR BAG
MODULE RH ....................................................

138

Description .............................................................

138

DTC Logic ..............................................................

138

Diagnosis Procedure .............................................

138

B1262 DOOR-MOUNTED CURTAIN AIR BAG
MODULE LH ....................................................

140

Description .............................................................

140

DTC Logic ..............................................................

140

Diagnosis Procedure .............................................

140

B1263 DOOR-MOUNTED CURTAIN AIR BAG
MODULE LH ....................................................

142

Description .............................................................

142

DTC Logic ..............................................................

142

Diagnosis Procedure .............................................

142

B1264 DOOR-MOUNTED CURTAIN AIR BAG
MODULE LH ....................................................

144

Description .............................................................

144

DTC Logic ..............................................................

144

Diagnosis Procedure .............................................

144

B1265 DOOR-MOUNTED CURTAIN AIR BAG
MODULE LH ....................................................

146

Description .............................................................

146

DTC Logic ..............................................................

146

Diagnosis Procedure .............................................

146

B1289 POP-UP ROLL BAR RH ......................

148

Description .............................................................

148

DTC Logic ..............................................................

148

Diagnosis Procedure .............................................

148

B1290 POP-UP ROLL BAR RH ......................

150

Description .............................................................

150

DTC Logic ..............................................................

150

Diagnosis Procedure .............................................

150

B1291 POP-UP ROLL BAR RH ......................

152

Description .............................................................

152

DTC Logic .............................................................

152

Diagnosis Procedure .............................................

152

B1292 POP-UP ROLL BAR RH .......................

154

Description ............................................................

154

DTC Logic .............................................................

154

Diagnosis Procedure .............................................

154

B1294 POP-UP ROLL BAR LH .......................

156

Description ............................................................

156

DTC Logic .............................................................

156

Diagnosis Procedure .............................................

156

B1295 POP-UP ROLL BAR LH .......................

158

Description ............................................................

158

DTC Logic .............................................................

158

Diagnosis Procedure .............................................

158

B1296 POP-UP ROLL BAR LH .......................

160

Description ............................................................

160

DTC Logic .............................................................

160

Diagnosis Procedure .............................................

160

B1297 POP-UP ROLL BAR LH .......................

162

Description ............................................................

162

DTC Logic .............................................................

162

Diagnosis Procedure .............................................

162

B1298 POP-UP ROLL BAR .............................

164

Description ............................................................

164

DTC Logic .............................................................

164

Diagnosis Procedure .............................................

164

B1336, B1337 SATELLITE SENSOR RH ........

166

DTC Logic .............................................................

166

Diagnosis Procedure .............................................

166

B1338, B1340, B1341, B1342 SATELLITE
SENSOR RH .....................................................

168

DTC Logic .............................................................

168

Diagnosis Procedure .............................................

168

B1339 SATELLITE SENSOR RH .....................

170

DTC Logic .............................................................

170

Diagnosis Procedure .............................................

170

B1343, B1344 SATELLITE SENSOR LH ........

171

DTC Logic .............................................................

171

Diagnosis Procedure .............................................

171

B1345, B1347, B1348, B1349 SATELLITE
SENSOR LH .....................................................

173

DTC Logic .............................................................

173

Diagnosis Procedure .............................................

173

B1346 SATELLITE SENSOR LH .....................

175

DTC Logic .............................................................

175

Diagnosis Procedure .............................................

175

B1350, B1351 SATELLITE SENSOR ..............

176

DTC Logic .............................................................

176

Diagnosis Procedure .............................................

176

Revision: 2013 February

2012 Murano CrossCabriolet

SRC-5

SRC

SYMPTOM DIAGNOSIS ............................

177

SRS AIR BAG WARNING LAMP DOES NOT
TURN OFF ........................................................

177

Diagnosis Procedure .............................................

177

SRS AIR BAG WARNING LAMP DOES NOT
TURN ON ........................................................

178

Diagnosis Procedure .............................................

178

SRS AIR BAG WARNING LAMP BLINKS .....

179

Diagnosis Procedure .............................................

179

Revision: 2013 February

2012 Murano CrossCabriolet

SRC-6

< PRECAUTION >

PRECAUTIONS

PRECAUTION

PRECAUTIONS

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"

INFOID:0000000007564572

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity 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 whether 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:

Always observe the following items for preventing accidental activation.
• To avoid rendering the SRS inoperative, 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 NISSAN/INFINITI dealer.

• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal

injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see “SRS AIR BAG”.

• Never use electrical test equipment on any circuit related to the SRS unless instructed to in this Ser-

vice Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness
connectors.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

WARNING:

Always observe the following items for preventing accidental activation.
• When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the

ignition ON or engine running, never 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 minutes before performing any service.

Precaution for Battery Service

INFOID:0000000007564573

Before disconnecting the battery, lower both the driver and passenger windows. This will prevent any interfer-
ence between the window edge and the vehicle when the door is opened/closed. During normal operation, the
window slightly raises and lowers automatically to prevent any window to vehicle interference. The automatic
window function will not work with the battery disconnected.

Service Procedure Precautions for Models with a Pop-up Roll Bar

INFOID:0000000007564574

WARNING:

Always observe the following items for preventing accidental activation.
• Risk of passenger injury or death may increase if the pop-up roll bar does not deploy during a roll

over collision. In order to reduce the chance of an incident where the pop-up roll bar is inoperative,
all maintenance must be performed by a NISSAN or INFINITI dealer.

• Before removing and installing the pop-up roll bar component parts and harness, always turn the

ignition switch OFF, disconnect the battery negative terminal, and wait for 3 minutes or more. (The
purpose of this operation is to discharge electricity that is accumulated in the auxiliary power supply
circuit in the air bag diagnosis sensor unit.)

• When repairing, removing, and installing a pop-up roll bar, always refer to SRS AIR BAG and SRS

AIR BAG CONTROL warnings in the Service Manual.

Revision: 2013 February

2012 Murano CrossCabriolet

COMPONENT PARTS

SRC-7

< SYSTEM DESCRIPTION >

SRC

SYSTEM DESCRIPTION

COMPONENT PARTS

Component Parts Location

INFOID:0000000007564575

Combination meter
Refer to

MWI-6, "METER SYSTEM :

Component Parts Location"

Combination switch (spiral cable)

Driver air bag module

Passenger air bag module

Front door satellite sensor LH

Door-mounted curtain air bag mod-
ule LH

Seat belt pre-tensioner LH

Satellite sensor LH

Side air bag module LH

JMHIA2073ZZ

Revision: 2013 February

2012 Murano CrossCabriolet

SRC-8

< SYSTEM DESCRIPTION >

COMPONENT PARTS

Component Description

INFOID:0000000007564576

10. Occupant Classification System con-

trol unit

11.

Pop-up roll bar

12. Air bag daignosis sensor unit

13. Crash zone sensor

View with door finisher removed

Behind door finisher assembly

Behind center piller lower garnish

View with seatback pad removed

Behind rear seat assembly

Behind center console assembly

Radiator core support assembly

Component

Function

Air bag diagnosis sensor unit

• Detects a collision and supplies power supply for deployment to air bag module and

pre-tensioner seat belt.

• Contains the “G” sensors for both frontal and side collisions and spare battery func-

tion in case of main battery damage in collision.

BCM

Receives the collision detection signal when air bag diagnosis sensor unit detects col-
lision.

Combination meter (air bag warning lamp)

Indicates air bag malfunctioning and deployment by blinking and illuminating air bag
warning lamp.

Combination switch (spiral cable)

Supplies power supply to driver air bag module on steering wheel.

Crash zone sensor

• Transmits signal to air bag diagnosis sensor unit when a frontal collision occurs.
• Crash zone sensor is a G sensor that outputs voltage signal at the time when a ve-

hicle frontal collision that is more than the specified limit is detected.

Door-mounted curtain air bag module LH/RH

• Deploys according to collision judgment of G sensor, pressure sensor, and safing

sensor.

• Receives collision signal from air bag diagnosis sensor unit, ignites, and burns ig-

nition material by electric ignition system, when side collision exceeds setting limit
of the vehicle. Gas is generated by chemical reaction of ignition material, passes
filter, and deploys air bag.

• Air bag module mainly consists of air bag and inflator that deploys air bag.

Driver air bag module

• Receives signal from air bag diagnosis sensor unit and deploys air bag.
• In case of frontal collision where acceleration is more than the specified level, the

ignition materials are ignited by electric ignition system. The system burns the gas
generating materials resulting in a chemical reaction. This generates hot gases that
flow into the air bag through a filter and expand the bag.

Front door satellite sensor LH/RH

• Transmits signal to air bag diagnosis sensor unit when a side collision occurs.
• When air bag diagnosis sensor unit defines both signal voltage of the “G” sensor,

pressure sensor and the safing algorithm to be that of collision which is more than
the specified level, the driving circuit switches on and feeds the electric ignitor of
both the side air bag, curtain air bag and pre-tensioner.

Occupant Classification System control unit

Detects passenger seat occupant and judges whether or not passenger seat air bag
is deployed.

Passenger air bag module

• Receives signal from air bag diagnosis sensor unit and deploys air bag.
• In case of frontal collision where acceleration is more than the specified level, the

Passenger air bag OFF indicator

Indicates whether or not passenger air bag is in the activation mode based on the
judgement of occupant classification system.

Satellite sensor LH/RH

• Transmits signal to air bag diagnosis sensor unit when a side collision occurs.
• When air bag diagnosis sensor unit defines both signal voltage of the “G” sensor,

Seat belt buckle switch LH/RH

Controls deployment timing depending on the seat belt condition that is fastened or
unfastened.

Revision: 2013 February

2012 Murano CrossCabriolet

COMPONENT PARTS

SRC-9

< SYSTEM DESCRIPTION >

SRC

Seat belt pre-tensioner LH/RH

• Receives signal from air bag diagnosis sensor unit and deploys seat belt pre-ten-

sioner and lap pre-tensioner.

• In the case of a frontal collision or side collision that exceeds specified impact level,

the air bag diagnosis sensor unit detects the deceleration caused by collision. It re-
strains the passenger with seat belt easing the stress on passengers chest with
load limiter.

Side air bag module LH/RH

• Receives signal from air bag diagnosis sensor unit and deploys air bag.
• In case of side collision where acceleration is more than the specified level, the ig-

nition materials are ignited by electric ignition system. The system burns the gas
generating materials resulting in a chemical reaction. This generates hot gases that
flow into the air bag through a filter and expand the bag.

Pop-up roll bar

It receives signal from diagnosis sensor unit and deploys.

Component

Function

Revision: 2013 February

2012 Murano CrossCabriolet

SRC-10

< SYSTEM DESCRIPTION >

SYSTEM

SYSTEM

System Diagram

INFOID:0000000007564577

System Description

INFOID:0000000007564578

Supplemental Restraint System (SRS) activates air bag module and seat belt pre-tensioner when it detects a
frontal collision or a side collision that is more than the specified limit.
Together with other safety devices, it reduces the impact that occupant receives when vehicle collision occurs.
Air bag diagnosis sensor unit supplies power supply to air bag module and pre-tensioner seat belt when decel-
eration that is more than the specified limit is detected by G sensor in air bag diagnosis sensor unit, crash
zone sensor, satellite sensor, or front door satellite sensor.

JMHIA2074GB

Revision: 2013 February

2012 Murano CrossCabriolet

SYSTEM

SRC-11

< SYSTEM DESCRIPTION >

SRC

Air bag module is composed of electric igniter (squib), filter, pyrotechnic material, and gas generating material.
When air bag module receives a signal from air bag diagnosis sensor unit, air bag module ignites pyrotechnic
material using electric igniter (squib) so that gas generating material generates high temperature nitrogen gas.
The gas through filter activates air bag. At the same time, pre-tensioner seat belt receives power supply from
air bag diagnosis sensor unit, gas generator is activated, and then gas is generated.
Balls in pipe are moved according to generated gas pressure and strike pinion gear on ELR shaft.
ELR shaft rotates and retracts seat belt.

AIR BAG DIAGNOSIS SENSOR UNIT FUNCTIONS

Air bag diagnosis sensor unit has the following functions.
• Detects a collision and supplies the energy for deploying air bag and seat belt pre-tensioner.
• Detects and records electrical malfunction in air bag system and seat belt pre-tensioner system, and blinking

air bag warning lamp.

• Detects and records the deployment of air bag and seat belt pre-tensioner, and turns ON air bag warning

lamp.

• Indicates malfunctioning portion via the number of blinks from the air bag warning lamp in the diagnosis

mode.

• Indicates the malfunction record via CONSULT.
• Suppresses the deployment of passenger air bag when passenger seat is empty or occupied by child or

child-seat.

• When passenger seat is occupied by child or child seat, turns ON passenger air bag OFF indicator.
• When judges that passenger seat is occupied by a adult or a child and passenger seat belt is not fasten,

turns ON seat belt warning lamp. Further information for the seat belt warning system.

COLLISION MODES

The operation of SRS is different depending on the collision modes applications. For example, the driver air
bag module, passenger air bag module, and seat belt pre-tensioner are activated in a frontal collision or side
collision.
SRS configurations that are activated for the following collision modes.

: Apply —: Not apply

OCCUPANT CLASSIFICATION SYSTEM

Occupant Classification System has the following functions.
• Suppresses the deployment of passenger air bag when passenger seat is empty, or when occupied by child

and child-seat.

• Turns on front passenger air bag OFF indicator when passenger seat is occupied by child-seat and child.
• Indicates malfunction portion via the number of blinks from the air bag warning lamp in the diagnosis mode.
• Indicates the malfunctioning record via CONSULT.
NOTE:
Operation of air bag diagnosis sensor unit when air bag diagnosis sensor unit receives information from Occu-
pant Classification System.

SRS configuration

Frontal collision

Left side collision

Right side collision

Roll over

Driver air bag module

—

Passenger air bag module

—

Seat belt pre-tensioner LH

—

Seat belt pre-tensioner RH

—

Side air bag module LH

—

Side air bag module RH

—

Door-mounted curtain air bag module LH

—

Door-mounted curtain air bag module RH

—

Pop-up roll bar LH

—

Pop-up roll bar RH

—

Revision: 2013 February

2012 Murano CrossCabriolet

SRC-12

< SYSTEM DESCRIPTION >

SYSTEM

Status
(front passenger seat)

Passenger air bag

Front passenger air
bag OFF indicator

Air bag warning lamp

Seat belt warning lamp
(when front passenger
seat is unbuckled)

Empty

Suppress

OFF

Child/ child-seat

Suppress

OFF

Adult

Enable to deploy

OFF

Malfunction

Suppress

Blinking

OFF

Revision: 2013 February

2012 Murano CrossCabriolet

DIAGNOSIS SYSTEM (AIR BAG)

SRC-13

< SYSTEM DESCRIPTION >

SRC

DIAGNOSIS SYSTEM (AIR BAG)

Description

INFOID:0000000007564579

CAUTION:

• Never use electrical test equipment on any circuit related to the SRS unless instructed in this Ser-

vice Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness
connectors.

• Never repair, splice or modify the SRS wiring harness. If the harness is damaged, replace it with a

new one.

• Keep ground portion clean.

DIAGNOSIS FUNCTION

• The SRS self-diagnostic results can be read with air bag warning lamp and/or CONSULT.
• The user mode is exclusively prepared for the customer (driver). This mode warns the driver of a system

malfunction through the operation of the air bag warning lamp.

• The diagnosis mode allows the technician to locate and inspect the malfunctioning part.
• The mode applications for the air bag warning lamp and CONSULT are as per the following items.

: Application, —: Not application

On Board Diagnosis Function

INFOID:0000000007564580

ON-BOARD DIAGNOSIS

There are two self diagnosis functions with air bag warning lamp per the following items.
• USER MODE
• DIAGNOSIS MODE

METHOD OF STARTING

• Diagnosis mode changes from user mode to diagnosis mode when changing operation is performed.
• In user mode, when SRS air bag warning lamp is not blinking, changing to diagnosis mode by ignition switch

operation is not possible.

• In diagnosis mode, when repair is complete and system is normal, the mode changes to user mode when

ignition switch is turned from OFF to ON.

Procedure to Change Diagnosis Mode

Turn ignition switch from OFF to ON.

SRS air bag lamp turns ON for 7 second and turns OFF, then turn ignition switch OFF within 1second after
the lamp turns OFF.

After turning ignition switch OFF, wait for 3 seconds or more.

Repeat operation 1 to 3 for 2 times so that operation 1 to 3 is repeated for 3times in total.

Turn ignition switch from OFF to ON. Diagnosis mode changes.

USER MODE

In USER MODE, air bag warning lamp on combination meter blinks when a malfunction is detected and warns
the customer (driver).

How to Read Air Bag Warning Lamp

Turn the ignition switch from OFF to ON, and check that the air bag warning lamp blinks.

Compare the air bag warning lamp blinking pattern with the examples.

Air Bag Warning Lamp Examples

Diagnosis tool

User mode

Diagnosis mode

Air bag warning lamp

CONSULT

–

Revision: 2013 February

2012 Murano CrossCabriolet

SRC-14

< SYSTEM DESCRIPTION >

DIAGNOSIS SYSTEM (AIR BAG)

DIAGNOSIS MODE

The diagnosis mode can only be switched when a malfunction is detected in the user mode. Malfunctioning
system is indicated according to blinking pattern of air bag warning lamp.

How to Read Air Bag Warning Lamp

Follow the procedures of “PROCEDURE TO CHANGE DIAGNOSIS MODE”, and switch to the diagnosis
mode.

Turn ignition switch ON. Check the blinking pattern of air bag warning lamp.
There are 2 blinking patterns for the air bag warning lamp as per the following items.
• Front air bag system: 3 second blink followed by a 0.5 second blink repeated.

Air bag warning lamp operation (user mode)

SRS condition

Reference item

• No malfunction is detected
• No further action is necessary

—

• The system is malfunctioning
• Self diagnostic result is not erased af-

ter repair

Erase “Self Diagnostic Result”
Refer to

SRC-17, "CONSULT Func-

tion"

, How to Erase Self-diagnostic

Result

Low battery voltage (Less than 9 V) or
high battery voltage (more than 16V)

Check “Cause of Warning Lamp”
with CONSULT
Refer to

SRC-17, "CONSULT Func-

tion"

Occupant Classification function is dis-
abled

Refer to

SRC-179, "Diagnosis Pro-

cedure"

Intermittent malfunction is detected in
the past

Go to

GI-40, "Intermittent Incident"

• Air bag is deployed
• Seat belt pre-tensioner is deployed

Go to

SRC-122, "Diagnosis Proce-

dure"

SRC-123, "Diagnosis Pro-

cedure"

• Air bag diagnosis sensor unit is mal-

functioning

• Air bag power supply circuit is mal-

functioning

• Air bag warning lamp circuit is mal-

functioning

Go to

SRC-177, "Diagnosis Proce-

dure"

• Air bag diagnosis sensor unit is mal-

functioning

• Air bag warning lamp circuit is mal-

functioning

Go to

SRC-178, "Diagnosis Proce-

dure"

SHIA0011E

SHIA0012E

SHIA0013E

SHIA0014E

Revision: 2013 February

2012 Murano CrossCabriolet

DIAGNOSIS SYSTEM (AIR BAG)

SRC-15

< SYSTEM DESCRIPTION >

SRC

• Side air bag system: Two 1.5 second blinks followed by a 0.5 second blink repeated.

Front air bag system

Side air bag system

How to Erase Self-diagnostic Result

After a malfunction is repaired, turn the ignition switch OFF for one second or more, then turn ignition switch
ON. The diagnosis mode returns to the user mode. At that time the self-diagnostic result is cleared.

EXAMPLE OF AIR BAG WARNING LAMP OPERATION IN THE DIAGNOSIS MODE

System Normal

When system is normal.

Single System Malfunction

• Front air bag system

Number of 0.5 second blinks

Malfunctioning items

• Self-diagnostic result is not erased after repair
• Intermittent malfunction is detected in the past

Seat belt pre-tensioner RH

Driver air bag module

Seat belt pre-tensioner LH

Occupant detction system control unit

Crash zone sensor

Air bag diagnosis sensor unit

Passenger air bag module

Front passenger air bag OFF indicator

Air bag diagnosis sensor unit

Number of 0.5-second blinks

Malfunctioning items

Side air bag module RH

Side air bag module LH

Satellite sensor RH

Satellite sensor LH

Curtain air bag module RH

Curtain air bag module LH

Front door satellite sensor RH

Front door satellite sensor LH

Door-mounted curtain air bag module RH

Door-mounted curtain air bag module LH

Pop-up roll bar RH

Pop-up roll bar LH

Front door satellite sensor LH/RH

JMHIA0945GB

Revision: 2013 February

2012 Murano CrossCabriolet

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