Nissan Silvia. Manual — part 178
ELECTRICAL SYSTEM
CONTENTS
PRECAUTIONS . . . . . . . . . . . . . . . ...3
Supplemental Restraint System (SRS)
. . . . . . . . . . . . . . . . . . . 3
Wiring Diagrams and Trouble Diagnosis. . . . . .3
HARNESS CONNECTOR. . . . . . . . . . . . 4
Description . . . . . . . . . . . . . . . . ...4
STANDARDIZED RELAY. . . . . . . . . . . . 5
Description . . . . . . . . . . . . . . . . ...5
POWER SUPPLY ROUTING. . . . . . . . . . ...7
Schematic . . . . . . . . . . . . . . . . . 7
Wiring Diagram - POWER - . . . . . . . . . . 8
Inspection. . . . . . . . . . . . . . . . ...14
GROUND. . . . . . . . . . . . . . . . . . 15
Ground Distribution. . . . . . . . . . . . . 15
COMBINATION SWITCH . . . . . . . . . . . ..26
Check. . . . . . . . . . . . . . . . . . .26
Replacement. . . . . . . . . . . . . . . ..27
HEADLAMP . . . . . . . . . . . . . . . . ...28
Component Parts and Harness Connector
Location . . . . . . . . . . . . . . . . . .28
System Description. . . . . . . . . . . . . 28
Wiring Diagram - H/LAMP -. . . . . . . . . ...29
Trouble Diagnoses. . . . . . . . . . . . . .31
Bulb Replacement . . . . . . . . . . . . . .32
Aiming Adjustment . . . . . . . . . . . . . .34
PARKING, LICENSE AND TAIL LAMPS . . . . . .35
Wiring Diagram - TAIL/L -. . . . . . . . . . ..35
STOP LAMP . . . . . . . . . . . . . . . . ..37
Wiring Diagram - STOP/L - . . . . . . . . . ...37
BACK-UP LAMP. . . . . . . . . . . . . . . 38
Wiring Diagram - BACK/L - . . . . . . . . . ...38
TURN SIGNAL AND HAZARD WARNING LAMPS . .39
Wiring Diagram - TURN - . . . . . . . . . . ..39
Trouble Diagnoses. . . . . . . . . . . . . .41
Blub Replacement . . . . . . . . . . . . . .41
Electrical Components Inspection . . . . . . . .42
ILLUMINATION. . . . . . . . . . . . . . . ..43
Schematic . . . . . . . . . . . . . . . . ..43
Wiring Diagram - ILL - . . . . . . . . . . . ...44
INTERIOR ROOM LAMP. . . . . . . . . . . ...47
System Description. . . . . . . . . . . . . 47
Wiring Diagram - ROOM/L - . . . . . . . . . ..49
Trouble Diagnoses for Interior Lamp Timer. . . ...50
SPOT AND TRUNK ROOM LAMPS . . . . . . . .57
Wiring Diagram - INT/L - . . . . . . . . . . ...57
METERS AND GAUGES. . . . . . . . . . . ...58
Component Parts and Harness Connector
Location . . . . . . . . . . . . . . . . . .58
System Description. . . . . . . . . . . . . 58
Combination Meter . . . . . . . . . . . . . 60
Schematic . . . . . . . . . . . . . . . . ..62
Wiring Diagram - METER - . . . . . . . . . ...63
Meter/Gauge Operation and Odo/Trip Meter
Segment Check in Diagnosis Mode . . . . . . ..64
Trouble Diagnoses. . . . . . . . . . . . . .65
Electrical Components Inspection . . . . . . . .71
WARNING LAMPS . . . . . . . . . . . . . . 73
Schematic . . . . . . . . . . . . . . . . ..73
Wiring Diagram - WARN - . . . . . . . . . . .74
Electrical Components Inspection . . . . . . . .77
A/T INDICATOR. . . . . . . . . . . . . . . .78
Wiring Diagram - AT/IND -. . . . . . . . . . .78
WARNING BUZZER . . . . . . . . . . . . . ..79
Component Parts and Harness Connector
Location . . . . . . . . . . . . . . . . . .79
System Description. . . . . . . . . . . . . 79
Wiring Diagram - BUZZER -. . . . . . . . . ..81
Trouble Diagnoses. . . . . . . . . . . . . .82
FRONT WIPER AND WASHER . . . . . . . . . 87
System Description. . . . . . . . . . . . . 87
Wiring Diagram - WIPER - . . . . . . . . . . 89
Removal and Installation . . . . . . . . . . ...90
Washer Nozzle Adjustment . . . . . . . . . ...91
Washer Tube Layout . . . . . . . . . . . . .92
HORN . . . . . . . . . . . . . . . . . . . .93
Wiring Diagram - HORN - . . . . . . . . . . .93
CIGARETTE LIGHTER. . . . . . . . . . . . ..94
Wiring Diagram - CIGAR -. . . . . . . . . . .94
GI
MA
EM
LC
EC
FE
CL
MT
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
CLOCK. . . . . . . . . . . . . . . . . . ...95
Wiring Diagram - CLOCK -. . . . . . . . . . 95
REAR WINDOW DEFOGGER. . . . . . . . . ...96
Component Parts and Harness Connector
Location . . . . . . . . . . . . . . . . . .96
System Description. . . . . . . . . . . . . 96
Wiring Diagram - DEF -. . . . . . . . . . . .97
Trouble Diagnoses. . . . . . . . . . . . . .98
Electrical Components Inspection . . . . . . ...100
Filament Check. . . . . . . . . . . . . . 101
Filament Repair . . . . . . . . . . . . . ...102
AUDIO . . . . . . . . . . . . . . . . . . ..103
Wiring Diagram - AUDIO -. . . . . . . . . ...103
AUDIO ANTENNA . . . . . . . . . . . . . ...104
Location of Antenna. . . . . . . . . . . . .104
Window Antenna Repair . . . . . . . . . . ..104
POWER SUNROOF. . . . . . . . . . . . . .106
System Description. . . . . . . . . . . . ..106
Wiring Diagram - SROOF - . . . . . . . . . .107
Trouble Diagnoses. . . . . . . . . . . . ...109
DOOR MIRROR . . . . . . . . . . . . . . ... 110
Wiring Diagram - MIRROR - . . . . . . . . ... 110
POWER WINDOW . . . . . . . . . . . . . ... 111
System Description. . . . . . . . . . . . .. 111
Schematic . . . . . . . . . . . . . . . . 113
Wiring Diagram - WINDOW - . . . . . . . . .. 114
Trouble Diagnoses. . . . . . . . . . . . ... 117
POWER DOOR LOCK. . . . . . . . . . . . .120
Component Parts and Harness Connector
Location . . . . . . . . . . . . . . . . ...120
System Description. . . . . . . . . . . . ..120
Wiring Diagram - D/LOCK -. . . . . . . . . .121
Trouble Diagnoses. . . . . . . . . . . . ...123
UNIFIED METER CONTROL UNIT (TIME
CONTROL SYSTEM). . . . . . . . . . . . ...131
Description . . . . . . . . . . . . . . . ...131
Schematic . . . . . . . . . . . . . . . . 132
Time Control System Inspection Table. . . . . 133
NATS (NISSAN ANTI-THEFT SYSTEM). . . . . .134
Component Parts and Harness Connetor
Location . . . . . . . . . . . . . . . . ...134
System Description. . . . . . . . . . . . ..135
System Composition. . . . . . . . . . . . 135
Wiring Diagram - NATS -. . . . . . . . . . .136
CONSULT-II . . . . . . . . . . . . . . . .137
Trouble Diagnoses. . . . . . . . . . . . ...139
How to Replace NATS IMMU. . . . . . . . ..153
ELECTRICAL UNITS LOCATION. . . . . . . ...154
Engine Compartment. . . . . . . . . . . ...154
Passenger Compartment. . . . . . . . . . .156
HARNESS LAYOUT . . . . . . . . . . . . . 158
How to Read Harness Layout . . . . . . . . .158
Outline. . . . . . . . . . . . . . . . . ..159
Main Harness. . . . . . . . . . . . . . ...160
Engine Room Harness . . . . . . . . . . . 162
Engine Control Harness . . . . . . . . . . ..166
Engine Sub Harness. . . . . . . . . . . . 168
Engine Harness . . . . . . . . . . . . . ...169
Body Harness . . . . . . . . . . . . . . ..170
Tail Harness . . . . . . . . . . . . . . . .172
Room Lamp Harness. . . . . . . . . . . ...173
Door Harness. . . . . . . . . . . . . . ...174
BULB SPECIFICATIONS . . . . . . . . . . . 175
Headlamp. . . . . . . . . . . . . . . . .175
Exterior Lamp . . . . . . . . . . . . . . ..175
Interior Lamp. . . . . . . . . . . . . . . 175
WIRING DIAGRAM CODES (CELL CODES). . . .176
CONTENTS
(Cont’d)
EL-2
Supplemental Restraint System (SRS) “AIR
BAG”
NMEL0001
The Supplemental Restraint System such as “AIR BAG” 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 composi-
tion which is available to NISSAN MODEL S15 is as follows:
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), a diagnosis
sensor unit, warning lamp, wiring harness and spiral cable.
Information necessary to service the system safely is included in the RS section of this Service Manual.
WARNING:
I
To 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 should be per-
formed by an authorized NISSAN dealer.
I
Improper 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.
I
Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified with yellow harness connector.
Wiring Diagrams and Trouble Diagnosis
NMEL0002
When you read wiring diagrams, refer to the following:
I
Refer to GI-11, “HOW TO READ WIRING DIAGRAMS”
I
Refer to EL-7, “POWER SUPPLY ROUTING” for power distribution circuit
When you perform trouble diagnosis, refer to the following:
I
Refer to GI-31, “HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES”
I
Refer to GI-20, “HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT”
Check for any Service bulletins before servicing the vehicle.
GI
MA
EM
LC
EC
FE
CL
MT
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
IDX
PRECAUTIONS
Supplemental Restraint System (SRS) “AIR BAG”
EL-3
Description
NMEL0003
HARNESS CONNECTOR (TAB-LOCKING TYPE)
NMEL0003S01
I
The tab-locking type connectors help prevent accidental looseness or disconnection.
I
The 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 or wires when disconnecting the connector.
[Example]
SEL769DA
HARNESS CONNECTOR
Description
EL-4
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