Supplemental Restraint System (SRS) “AIR BAG” and “SEAT BELT PRE-TENSIONER”
Supplemental Restraint System (SRS) “AIR
BAG” and “SEAT BELT PRE-TENSIONER”
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELTPRE-TENSIONER” used along with
a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of
collision. The SRS system composition which is available to NISSAN MODEL R50 is as follows:
IFor a frontal collision
The Supplemental Restraint System consists of driver air bag module (located in the center of the steering wheel), front passenger air bag module (located on the instrument panel on passenger side), seat belt
pre-tensioners, a diagnosis sensor unit, warning lamp, wiring harness and spiral cable.
IFor a side collision
The Supplemental Restraint System consists of side air bag module (located in the outer side of front seat),
satellite sensor, diagnosis sensor unit (one ofcomponents of air bags for a frontal collision),wiring harness,
warning lamp (one of components of air bags for a frontal collision).
Information necessary to service the system safely is included in the RS section of this Service Manual.
WARNING:
ITo avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be performed
by an authorized NISSAN dealer.
IImproper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the RS section.
IDo not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. Spiral cable and wiring harnesses covered with yellow insulation tape either just
before the harness connectors or for the complete harness are related to the SRS.
NAEL0001
EXIT
EXIT
Wiring Diagrams and Trouble Diagnosis
When you read wiring diagrams, refer to the following:
IGI-11, “HOW TO READ WIRING DIAGRAMS”
IEL-9, “POWER SUPPLY ROUTING” for power distribution circuit
When you perform trouble diagnosis, refer to the following:
IGI-34, “HOW TO FOLLOW TEST GROUP IN TROUBLE DIAGNOSIS”
IGI-23, “HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT”
Check for any Service bulletins before servicing the vehicle.
NAEL0002
EL-4
HARNESS CONNECTOR
Description
EXIT
EXIT
Description
HARNESS CONNECTOR (TAB-LOCKING TYPE)
IThe tab-locking type connectors help prevent accidental looseness or disconnection.
IThe tab-locking type connectors are disconnected by pushing or lifting the locking tab(s). Refer to the
illustration below.
Refer to the next page for description of the slide-locking type connector.
CAUTION:
Do not pull the harness when disconnecting the connector.
[Example]
NAEL0003
NAEL0003S01
GI
MA
EM
LC
EC
FE
CL
MT
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
EL-5
SC
SEL769D
IDX
Description (Cont’d)
HARNESS CONNECTOR
EXIT
EXIT
HARNESS CONNECTOR (SLIDE-LOCKING TYPE)
=NAEL0003S02
IA new style slide-locking type connector is used on certain systems and components, especially those
related to OBD.
IThe slide-locking type connectors help prevent incomplete locking and accidental looseness or disconnec-
tion.
IThe slide-locking type connectors are disconnected by pushing or pulling the slider. Refer to the illustra-
tion below.
CAUTION:
IDo not pull the harness or wires when disconnecting the connector.
IBe careful not to damage the connector support bracket when disconnecting the connector.
[Example]
EL-6
SEL769V
STANDARDIZED RELAY
Description
EXIT
EXIT
Description
NORMAL OPEN, NORMAL CLOSED AND MIXED TYPE RELAYS
Relays can mainly be divided into three types: normal open, normal closed and mixed type relays.
NAEL0004
NAEL0004S01
SEL881H
GI
MA
EM
LC
EC
FE
CL
MT
AT
TYPE OF STANDARDIZED RELAYS
1M1 Make2M2 Make
1T1 Transfer1M·1B1 Make 1 Break
NAEL0004S02
SEL882H
TF
PD
AX
SU
BR
ST
RS
BT
HA
EL-7
SC
IDX
Description (Cont’d)
STANDARDIZED RELAY
EXIT
EXIT
EL-8
SEL661TA
POWER SUPPLY ROUTING
Schematic
EXIT
EXIT
Schematic
NAEL0005
GI
MA
EM
LC
EC
FE
CL
MT
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
EL-9
SC
MEL923K
IDX
Wiring Diagram — POWER —
POWER SUPPLY ROUTING
EXIT
EXIT
Wiring Diagram — POWER —
BATTERY POWER SUPPLY — IGNITION SW. IN ANY POSITION
NAEL0006
NAEL0006S01
EL-10
MEL924K
POWER SUPPLY ROUTING
Wiring Diagram — POWER — (Cont’d)
GI
MA
EM
LC
EC
FE
CL
MT
EXIT
EXIT
AT
TF
PD
AX
SU
BR
ST
RS
BT
EL-11
HA
SC
MEL019L
IDX
Wiring Diagram — POWER — (Cont’d)
POWER SUPPLY ROUTING
EXIT
EXIT
EL-12
MEL925K
POWER SUPPLY ROUTING
Wiring Diagram — POWER — (Cont’d)
EXIT
EXIT
ACCESSORY POWER SUPPLY — IGNITION SW. IN “ACC” OR “ON”
NAEL0006S02
GI
MA
EM
LC
EC
FE
CL
MT
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
EL-13
SC
MEL912J
IDX
Wiring Diagram — POWER — (Cont’d)
POWER SUPPLY ROUTING
EXIT
EXIT
IGNITION POWER SUPPLY — IGNITION SW. IN “ON” AND/OR “START”
NAEL0006S03
EL-14
MEL926K
POWER SUPPLY ROUTING
Wiring Diagram — POWER — (Cont’d)
GI
MA
EM
LC
EC
FE
CL
MT
EXIT
EXIT
AT
TF
PD
AX
SU
BR
ST
RS
BT
EL-15
HA
SC
MEL914J
IDX
Inspection
POWER SUPPLY ROUTING
EXIT
EXIT
CEL083
MEL944F
Inspection
FUSE
NAEL0007
NAEL0007S01
IIf fuse is blown, be sure to eliminate cause of problem
before installing new fuse.
IUse fuse of specified rating. Never use fuse of more than
specified rating.
IDo not partially install fuse; always insert it into fuse
holder properly.
IRemove fuse for “ELECTRICAL PARTS (BAT)” if vehicle is
not used for a long period of time.
FUSIBLE LINK
NAEL0007S02
A melted fusible link can be detected either by visual inspection or
by feeling with finger tip. If its condition is questionable, use circuit
tester or test lamp.
CAUTION:
IIf fusible link should melt, it is possible that critical circuit
(power supply or large current carrying circuit) is shorted.
In such a case, carefully check and eliminate cause of
problem.
INever wrap outside of fusible link with vinyl tape. Impor-
tant: Never let fusible link touch any other wiring harness,
vinyl or rubber parts.
SBF284E
CIRCUIT BREAKER
NAEL0007S03
For example, when current is 30A, the circuit is broken within 8 to
20 seconds.
EL-16
GROUND
Ground Distribution
EXIT
EXIT
Ground Distribution
EARTHCONNECT TOCONN. NO.CELL CODE
M4/M66AIR BAG DIAGNOSIS SENSOR UNITZ4RS-SRS
AIR MIX DOOR MOTORM55HA-A/C, A
ASCD CONTROL UNITM3EL-ASCD
ASCD MAIN SWITCHM18EL-ASCD
CLUTCH INTERLOCK SWITCHM28SC-START
COMBINATION FLASHER UNITM15EL-TURN
DOOR LOCK AND UNLOCK SWITCH RHD38EL-D/LOCK
DOOR MIRROR DEFOGGER RHD31EL-DEF
DOOR MIRROR REMOTE CONTROL SWITCHM17EL-MIRROR
FRONT DOOR KEY CYLINDER SWITCH RHD39EL-D/LOCK EL-THEFT
HEADLAMP BATTERY SAVER CONTROL UNITM115
HEADLAMP BATTERY SAVER CONTROL UNITM116
MODE DOOR MOTORM38HA-A/C, A
EL-H/LAMP EL-DTRL EL-TAIL/L
EL-F/FOG EL-ILL
EL-H/LAMP EL-DTRL EL-TAIL/L
EL-F/FOG EL-ILL
NAEL0008
GI
MA
EM
LC
EC
FE
CL
MT
AT
POWER ANTENNAM69EL-P/ANT
POWER WINDOW RELAYM23EL-SROOF EL-WINDOW
REAR WINDOW DEFOGGER SWITCHM36EL-DEF
RECIRCULATION SWITCHM42HA-HEATER HA-A/C, M
SHIELD WIRE (FRONT DOOR SPEAKER LH)D12EL-AUDIO
SHIELD WIRE (TWEETER LH)M8EL-AUDIO
M77/M111A/C AUTO AMP.M102HA-A/C, A
A/C AUTO AMP.M103HA-A/C, A
AUDIO AMP. RELAYB47EL-AUDIO
CIGARETTE LIGHTER SOCKETM56EL-CIGAR
COMBINATION METER (4WD)M25EL-WARN
COMBINATION METER (ABS)M25BR-ABS EL-WARN
COMBINATION METER (AIR BAG)M24RS-SRS EL-WARN
COMBINATION METER (CRUISE INDICATOR LAMP)M25EL-WARN EL-ASCD
COMBINATION METER (FUEL GAUGE)M24EL-METER
COMBINATION METER (HIGH BEAM INDICATOR)M25EL-H/LAMP EL-DTRL
COMBINATION METER (SPEEDOMETER)M24
EC-VSS AT-VSSMTR EL-METER
EL-ASCD
TF
PD
AX
SU
BR
ST
RS
BT
HA
COMBINATION METER (TURN SIGNAL)M25EL-TURN
COMBINATION METER (WATER TEMPERATURE
M77/M111DATA LINK CONNECTOR FOR CONSULTM11EC-MIL/DL AT-NONDTC TF-T/F
DATA LINK CONNECTOR FOR GSTM9EC-MIL/DL
DOOR MIRROR DEFOGGER LHD1EL-DEF
FAN CONTROL AMP.M60HA-A/C, A
FAN SWITCHM43HA-HEATER HA-A/C, M
FRONT DOOR KEY CYLINDER SWITCH LHD9EL-D/LOCK EL-THEFT
FRONT DOOR LOCK ACTUATOR LHD7EL-INT/L EL-MULTI EL-THEFT
FRONT DOOR LOCK ACTUATOR RHD37EL-THEFT
FRONT DOOR SPEAKER LHD12EL-AUDIO
FRONT DOOR SPEAKER RHD42EL-AUDIO
FRONT WIPER AMP.M79EL-WIPER
FRONT WIPER MOTORM78EL-WIPER
EXIT
EXIT
FUSE BLOCK (ACCESSORY RELAY, IGNITION RELAY
AND BLOWER MOTOR RELAY)
HEADLAMP BATTERY SAVER CONTROL UNITM115
HEADLAMP BATTERY SAVER CONTROL UNITM116
HEATED SEAT SWITCH LHM52EL-HSEAT
HEATED SEAT SWITCH RHM53EL-HSEAT
ILLUMINATION CONTROL SWITCHM19EL-ILL
INTEGRATED HOMELINKY TRANSMITTERR5EL-TRNSMT
INTAKE DOOR MOTORM138HA-A/C, A
POWER WINDOW MAIN SWITCHD6EL-WINDOW
POWER WINDOW MAIN SWITCH (DOOR LOCK AND
UNLOCK SWITCH LH)
SHIELD WIRE (FRONT DOOR SPEAKER LH)D12EL-AUDIO
SHIELD WIRE (FRONT DOOR SPEAKER RH)D42EL-AUDIO
SHIELD WIRE (TWEETER RH)M64EL-AUDIO
COMBINATION SWITCH (REAR WIPER SWITCH)E114EL-WIP/R
DAYTIME LIGHT CONTROL UNITE45EL-DTRL EL-THEFT
FRONT FOG LAMP LHE61EL-F/FOG
FRONT FOG LAMP RHE62EL-F/FOG
FRONT TURN SIGNAL LAMP LHE12EL-TURN
FRONT TURN SIGNAL LAMP RHE40EL-TURN
FRONT WASHER MOTORE44EL-WIPER
HEADLAMP LHE29EL-H/LAMP EL-THEFT
HEADLAMP RHE38EL-H/LAMP EL-DTRL EL-THEFT
HOOD SWITCHE31EL-THEFT
PARKING LAMP LHE12EL-TAIL/L
For removal and installation of spiral cable, refer to RS-20,
“Installation — Air Bag Module and Spiral Cable”, “SUPPLEMENTAL RESTRAINT SYSTEM (SRS)”.
IEach switch can be replaced without removing combination
switch base.
ITo remove combination switch base, remove base attaching
screw.
IBefore installing the steering wheel, align the steering wheel
guide pins with the screws which secure the combination
switch as shown in the left figure.
NAEL0010
GI
MA
EM
LC
EC
FE
CL
MT
AT
TF
SEL151V
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL-23
IDX
Check
STEERING SWITCH
EXIT
EXIT
Check
NAEL0011
EL-24
MEL031L
HEADLAMP (FOR USA)
Component Parts and Harness Connector Location
EXIT
EXIT
Component Parts and Harness Connector
Location
GI
NAEL0159
MA
EM
LC
EC
FE
CL
MT
AT
SEL044W
System Description
The headlamp operation is controlled by the lighting switch which is built into the combination switch and
headlamp battery saver control unit. And the headlamp battery saver system is controlled by the headlamp
battery saver control unit and smart entrance control unit.
OUTLINE
Power is supplied at all times
Ito headlamp LH relay terminals 2 and 3
Ithrough 15A fuse (No. 60, located in the fuse and fusible link box), and
Ito headlamp RH relay terminals 2 and 3
Ithrough 15A fuse (No. 59, located in the fuse and fusible link box), and
Ito headlamp battery saver control unit terminal 7
Ithrough 7.5A fuse [No. 24, located in the fuse block (J/B)].
When the ignition switch is in the ON or START position, power is supplied
Ito headlamp battery saver control unit terminal 1
Ithrough 10A fuse [No. 16, located in the fuse block (J/B)], and
Ito headlamp battery saver control unit terminal 10, and
Ito smart entrance control unit terminal 33
Ithrough 7.5A fuse [No. 11, located in the fuse block (J/B)]
Ground is supplied to headlamp battery saver control unit terminals 4 and 11.
NAEL0012
NAEL0012S04
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
EL-25
System Description (Cont’d)
HEADLAMP (FOR USA)
EXIT
EXIT
When Ignition Switch is in ON or START Position
NAEL0012S0401
Ground is supplied
Ito headlamp LH relay terminal 1 from headlamp battery saver control unit terminal 2
Ithrough headlamp battery saver control unit terminal 3, and
Ithrough body grounds M4 and M66, and
Ito headlamp RH relay terminal 1 from headlamp battery saver control unit terminal 8
Ithrough headlamp battery saver control unit terminal 9, and
Ithrough body grounds M77 and M111.
Headlamp relays (LH and RH) are then energized.
When Ignition Switch is in OFF or ACC Position
NAEL0012S0402
When lighting switch is in 2ND (or 1ST) position, ground is supplied
Ito headlamp battery saver control unit terminals 5 and 13
Ifrom lighting switch terminal 11.
And then, ground is also supplied to headlamp LH and RH relays terminal 1 from headlamp battery saver
control unit. Headlamp relays (LH and RH) are then energized.
LOW BEAM OPERATION
NAEL0012S01
When the lighting switch is turned to the 2ND position and placed in LOW (“B”) position, power is supplied
Ifrom lighting switch terminal 10
Ito terminal 2 of the LH headlamp, and
Ifrom lighting switch terminal 7
Ito terminal 2 of the RH headlamp.
Terminal 3 of each headlamp supplies ground through body grounds E13 and E41.
With power and ground supplied, the headlamp(s) will illuminate.
HIGH BEAM OPERATION/FLASH-TO-PASS OPERATION
NAEL0012S02
When the lighting switch is turned to the 2ND position and placed in HIGH (“A”) position or PASS (“C”) position,
power is supplied
Ifrom lighting switch terminal 6
Ito terminal 1 of the RH headlamp, and
Ifrom lighting switch terminal 9
Ito terminal 1 of the LH headlamp, and
Ito combination meter terminal 33 for the high beam indicator.
Ground is supplied to terminal 19 of the combination meter through body grounds M77 and M111.
Terminal 3 of each headlamp supplies ground through body grounds E13 and E41.
With power and ground supplied, the high beams and the high beam indicator illuminate.
BATTERY SAVER CONTROL
NAEL0012S05
When the ignition switch is turned from ON (or START) to OFF (or ACC) positions while headlamps illuminate,
the RAP signal is supplied to terminal 10 of the headlamp battery saver control unit from smart entrance control unit terminal 5.
After counting 45 seconds by the RAP signal from the smart entrance control unit to headlamp battery saver
control unit, the ground supply to terminal 1 of the headlamp LH and RH relay from headlamp battery saver
control unit terminals 2 and 8 is terminated.
Then the headlamps are turned off.
The headlamps are turned off when driver or passenger side door is opened even if 45 seconds have not
passed after ignition switch is turned from ON (or START) to OFF (or ACC) positions while headlamps are
illuminated.
When the lighting switch is turned from OFF to 2ND after headlamps are turned to off by the battery saver
control, ground is supplied
Ito headlamp battery saver control unit terminals 5 and 13 from lighting switch terminal 11, and
Ito headlamp LH and RH relays terminal 1 from headlamp battery saver control unit terminals 2 and 8.
Then headlamps illuminate again.
EL-26
HEADLAMP (FOR USA)
System Description (Cont’d)
EXIT
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THEFT WARNING SYSTEM
The theft warning system will flash the high beams if the system is triggered. Refer to “THEFT WARNING
SYSTEM” (EL-245).
NAEL0012S03
GI
MA
EM
LC
EC
FE
CL
MT
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
EL-27
SC
IDX
Schematic
HEADLAMP (FOR USA)
EXIT
EXIT
Schematic
NAEL0160
EL-28
MEL010K
HEADLAMP (FOR USA)
Wiring Diagram — H/LAMP —
EXIT
EXIT
Wiring Diagram — H/LAMP —
NAEL0013
GI
MA
EM
LC
EC
FE
CL
MT
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
EL-29
SC
MEL199M
IDX
Wiring Diagram — H/LAMP — (Cont’d)
HEADLAMP (FOR USA)
EXIT
EXIT
EL-30
MEL915J
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