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K ELECTRICAL

B
SECTION
POWER SUPPLY, GROUND & CIRCUIT ELEMENTS C

E
CONTENTS
PRECAUTIONS ......................................................... 3. Engine Compartment ............................................. 30 . F
Precautions for Supplemental Restraint System Passenger Compartment ....................................... 31 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- HARNESS LAYOUT ................................................. 33 .
SIONER" ................................................................. 3
. How to Read Harness Layout ................................ 33 . G
Wiring Diagrams and Trouble Diagnosis ................. 3 . TO USE THE GRID REFERENCE ..................... 33 .
HARNESS CONNECTOR .......................................... 4 . CONNECTOR SYMBOL .................................... 33 .
Description .............................................................. 4
. Outline ................................................................... 34
.
H
HARNESS CONNECTOR (TAB-LOCKING Main Harness (King Cab Models) .......................... 35 .
TYPE) ................................................................... 4
. Main Harness (Crew Cab Models) ........................ 37 .
HARNESS CONNECTOR (SLIDE-LOCKING Engine Room Harness (KA24DE Models) ............. 39 .
TYPE) ................................................................... 5
. ENGINE COMPARTMENT ................................. 39 . I
HARNESS CONNECTOR (DIRECT-CONNECT PASSENGER COMPARTMENT ........................ 41 .
SRS COMPONENT TYPE) .................................. 6 . Engine Room Harness (VG33E and VG33ER Mod-
STANDARDIZED RELAY .......................................... 7 . els) ......................................................................... 42
. J
Description .............................................................. 7
. ENGINE COMPARTMENT ................................. 42 .
NORMAL OPEN, NORMAL CLOSED AND PASSENGER COMPARTMENT ........................ 44 .
MIXED TYPE RELAYS ........................................ 7 . Engine Control Harness (KA24DE Models) ........... 45 . PG
TYPE OF STANDARDIZED RELAYS .................. 7 . Engine No. 2 Harness (KA24DE Models) .............. 47 .
POWER SUPPLY ROUTING ..................................... 9 . Engine Control Harness (VG33E Models) ............. 48 .
Circuit Diagram ....................................................... 9
. Engine Control Harness (VG33ER Models) .......... 50 .
Wiring Diagram -- POWER -- ...............................11 . Engine No. 2 Harness (VG33E and VG33ER Mod- L
BATTERY POWER SUPPLY -- IGNITION SW. els) ......................................................................... 52
.
IN ANY POSITION ..............................................11 . Chassis and Tail Harness (KA24DE Models) ........ 53 .
ACCESSORY POWER SUPPLY -- IGNITION Chassis and Tail Harness (VG33E and VG33ER M
SW. IN ACC OR ON ........................................... 13 . Models) .................................................................. 54
.
IGNITION POWER SUPPLY -- IGNITION SW. Room Lamp Harness ............................................. 55 .
IN ON AND/OR START ...................................... 14 . Front Door Harness ............................................... 55 .
Inspection .............................................................. 16
. LH SIDE ............................................................. 55 .
FUSE .................................................................. 16
. RH SIDE ............................................................. 56 .
FUSIBLE LINK ................................................... 16 . Rear Door Harness ................................................ 56 .
CIRCUIT BREAKER .......................................... 16 . LH SIDE ............................................................. 56 .
GROUND ................................................................. 17
. RH SIDE ............................................................. 57 .
Ground Distribution ............................................... 17. Wiring Diagram Codes (Cell Codes) ..................... 58 .
MAIN HARNESS ................................................ 17 . SUPER MULTIPLE JUNCTION (SMJ) .................... 61 .
ENGINE ROOM HARNESS ............................... 20 . Installation ............................................................. 61
.
ENGINE CONTROL HARNESS ........................ 24 . Terminal Arrangement ........................................... 62 .
ENGINE NO. 2 HARNESS ................................. 27 . FUSE BLOCK -- JUNCTION BOX (J/B) ................ 63 .
GENERATOR HARNESS .................................. 28 . Terminal Arrangement ........................................... 63 .
ROOM LAMP HARNESS ................................... 29 . FUSE AND FUSIBLE LINK BOX ............................. 64 .
ELECTRICAL UNITS LOCATION ........................... 30 . Terminal Arrangement ........................................... 64 .

PG-1
ELECTRICAL UNITS ............................................... 65
.
Terminal Arrangement ........................................... 65
.

PG-2
PRECAUTIONS

PRECAUTIONS PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EKS003OB

The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along B
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 may include seat belt switch inputs and dual stage front air bag modules. If
equipped with dual stage front air bag modules, the SRS system uses the seat belt switches to determine the C
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 and SB section of this Service Manual.
D
The vehicle may be equipped with a passenger air bag deactivation switch. Because no rear seat exists where
a rear-facing child restraint can be placed, the switch is designed to turn off the passenger air bag so that a
rear-facing child restraint can be used in the front passenger seat. The switch is located in the center of the E
instrument panel, near the ashtray. When the switch is turned to the ON position, the passenger air bag is
enabled and could inflate for certain types of collision. When the switch is turned to the OFF position, the pas-
senger air bag is disabled and will not inflate. A passenger air bag OFF indicator on the instrument panel lights
up when the passenger air bag is switched OFF. The driver air bag always remains enabled and is not affected F
by the passenger air bag deactivation switch.

WARNING: G
q 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 must be per-
formed by an authorized NISSAN/INFINITI dealer. H
q 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 SRS section.
I
q 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 by yellow and/or orange harnesses or
harness connectors.
J
q The vehicle may be equipped with a passenger air bag deactivation switch which can be operated
by the customer. When the passenger air bag is switched OFF, the passenger air bag is disabled
and will not inflate. When the passenger air bag is switched ON, the passenger air bag is enabled
and could inflate for certain types of collision. After SRS maintenance or repair, make sure the PG
passenger air bag deactivation switch is in the same position (ON or OFF) as when the vehicle
arrived for service.
Wiring Diagrams and Trouble Diagnosis EKS003NK
L

When you read wiring diagrams, refer to the following:
q GI-13, "How to Read Wiring Diagrams". M
q PG-9, "POWER SUPPLY ROUTING" for power distribution circuit.
When you perform trouble diagnosis, refer to the following:
q GI-9, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES".
q GI-25, "How to Perform Efficient Diagnosis for an Electrical Incident".
Check for any Service bulletins before servicing the vehicle.

PG-3
HARNESS CONNECTOR

HARNESS CONNECTOR PFP:24010

Description EKS003NW

HARNESS CONNECTOR (TAB-LOCKING TYPE)
q The tab-locking type connectors help prevent accidental looseness or disconnection.
q 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

PG-4
HARNESS CONNECTOR

HARNESS CONNECTOR (SLIDE-LOCKING TYPE)
q A new style slide-locking type connector is used on certain systems and components, especially those A
related to OBD.
q The slide-locking type connectors help prevent incomplete locking and accidental looseness or discon-
nection. B
q The slide-locking type connectors are disconnected by pushing or pulling the slider. Refer to the illustra-
tion below.
CAUTION: C
q Do not pull the harness or wires when disconnecting the connector.
q Be careful not to damage the connector support bracket when disconnecting the connector.
[Example] D

AEL299C

PG-5
HARNESS CONNECTOR

HARNESS CONNECTOR (DIRECT-CONNECT SRS COMPONENT TYPE)
q SRS direct-connect type harness connectors are used on certain SRS components such as air bag mod-
ules and seat belt pre-tensioners.
q Always pull up to release black locking tab prior to removing connector from SRS component.
q Always push down to lock black locking tab after installing connector to SRS component. When locked,
the black locking tab is level with the connector housing.
CAUTION:
q Do not pull the harness or wires when removing connectors
from SRS components.

WHIA0103E

PG-6
STANDARDIZED RELAY

STANDARDIZED RELAY PFP:25230
A
Description EKS003NN

NORMAL OPEN, NORMAL CLOSED AND MIXED TYPE RELAYS
Relays can mainly be divided into three types: normal open, normal closed and mixed type relays. B

SEL881H
H
TYPE OF STANDARDIZED RELAYS

SEL882H

1M 1 Make 2M 2 Make
1T 1 Transfer 1M

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