Nissan Frontier Electrical System EL 2000 Owner's Manual

ELECTRICAL SYSTEM

SECTION EL

When you read wiring diagrams:

●

Read GI section, ‘‘HOW TO READ WIRING DIAGRAMS’’. When you perform trouble diagnoses, read GI section, ‘‘HOW TO FOLLOW FLOW CHART IN TROUBLE DIAGNOSES’’ and ‘‘HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT’’.

●

Check for any service bulletins before servicing the vehicle.

CONTENTS

PRECAUTIONS AND PREPARATION............................4

Supplemental Restraint System (SRS)

‘‘AIR BAG’’...................................................................4

HARNESS CONNECTOR................................................5

Description...................................................................5

STANDARDIZED RELAY ................................................7

Description...................................................................7

POWER SUPPLY ROUTING...........................................9

Schematic....................................................................9

Wiring Diagram — POWER —..................................11

Fuse...........................................................................16

Fusible Link................................................................16

Circuit Breaker Inspection .........................................16

GROUND DISTRIBUTION.............................................17

Main Harness.............................................................17

Engine Room Harness ..............................................19

Engine Control Harness ............................................21

Generator Harness ....................................................23

BATTERY.......................................................................24

How to Handle Battery ..............................................24

Service Data and Specifications (SDS).....................27

STARTING SYSTEM .....................................................28

System Description....................................................28

Wiring Diagram — START —....................................30

Construction...............................................................32

Removal and Installation...........................................33

Pinion/Clutch Check ..................................................33

Service Data and Specifications (SDS).....................33

CHARGING SYSTEM....................................................34

System Description....................................................34

Wiring Diagram — CHARGE —................................35

Trouble Diagnoses.....................................................36

Construction...............................................................37

Removal and Installation...........................................38

Service Data and Specifications (SDS).....................38

COMBINATION SWITCH...............................................39

Check.........................................................................39

Replacement..............................................................40

STEERING SWITCH......................................................41

Check.........................................................................41

HEADLAMP...................................................................42

System Description (For USA) ..................................42

Wiring Diagram (For USA) — H/LAMP — ................43

Trouble Diagnoses.....................................................44

Bulb Replacement .....................................................45

Aiming Adjustment.....................................................45

HEADLAMP — Daytime Light System — ..................47

System Description (For Canada).............................47

Operation (For Canada) ............................................48

Schematic (For Canada) ...........................................49

Wiring Diagram (For Canada) — DTRL —...............50

Trouble Diagnoses (For Canada)..............................53

Bulb Replacement .....................................................54

Aiming Adjustment.....................................................54

PARKING, LICENSE AND TAIL LAMPS......................55

Wiring Diagram — TAIL/L —.....................................55

STOP LAMP ..................................................................57

Wiring Diagram — STOP/L —...................................57

BACK-UP LAMP............................................................58

Wiring Diagram — BACK/L —...................................58

FRONT FOG LAMP.......................................................59

System Description....................................................59

Wiring Diagram — F/FOG —....................................60

Aiming Adjustment.....................................................61

Removal and Installation...........................................62

Bulb and Lens Replacement .....................................62

TURN SIGNAL AND HAZARD WARNING LAMPS.....63

System Description....................................................63

IDX

CONTENTS (Cont’d.)

Wiring Diagram — TURN — .....................................65

Trouble Diagnoses.....................................................67

Electrical Components Inspection.............................67

ILLUMINATION..............................................................68

System Description....................................................68

Wiring Diagram — ILL — ..........................................69

INTERIOR ROOM LAMP...............................................70

Component Parts and Harness Connector

Location .....................................................................70

System Description....................................................71

Wiring Diagram — ROOM/L —.................................73

Trouble Diagnoses (For models with power door

locks)..........................................................................76

SPOT LAMP ..................................................................77

Wiring Diagram — INT/L —.......................................77

METER AND GAUGES .................................................78

Component Parts and Harness Connector

Location .....................................................................78

System Description....................................................79

Unified Control Meter............................................79

How To Change The Display For Odo/Trip

Meter.....................................................................79

Combination Meter ....................................................81

With Tachometer ...................................................81

Without Tachometer ..............................................82

Wiring Diagram — METER —...................................83

Meter/gauge Operation and Odo/Trip Meter

Segment Check in Diagnosis Mode..........................84

Diagnosis Function................................................84

How To Alternate Diagnosis Mode........................84

Flexible Print Circuit (FPC)........................................85

Disconnect.............................................................85

Connect.................................................................85

Trouble Diagnoses.....................................................86

Preliminary Check.................................................86

Symptom Chart 1 (Malfunction is indicated in

diagnosis mode)....................................................87

Symptom Chart 2 (No malfunction is indicated

in diagnosis mode)................................................87

Power Supply And Ground Circuit Check.............88

Inspection/Vehicle Speed Sensor.........................89

Inspection/Engine Revolution Signal (Models

with tachometer)....................................................89

Inspection/Fuel Tank Gauge .................................90

Inspection/Thermal Transmitter.............................90

Electrical Components Inspection.............................91

Meter/Gauge Resistance Check...........................91

Fuel Tank Gauge Unit Check................................91

Thermal Transmitter Check...................................92

Vehicle Speed Sensor Signal Check....................92

WARNING LAMPS ........................................................93

System Description....................................................93

Schematic..................................................................95

Wiring Diagram — WARN — ....................................96

Electrical Components Inspection...........................101

A/T INDICATOR...........................................................102

Wiring Diagram — AT/IND —..................................102

WARNING CHIME .......................................................103

Component Parts and Harness Connector

Location ...................................................................103

System Description..................................................104

Wiring Diagram — CHIME —..................................106

Trouble Diagnoses...................................................108

Electrical Components Inspection...........................114

FRONT WIPER AND WASHER..................................115

System Description..................................................115

Wiring Diagram — WIPER — .................................117

Trouble Diagnoses (With intermittent wipers) .........119

Removal and Installation.........................................121

Washer Nozzle Adjustment .....................................122

Washer Tube Layout ...............................................122

HORN...........................................................................123

Wiring Diagram — HORN —...................................123

CIGARETTE LIGHTER................................................124

Wiring Diagram — CIGAR —..................................124

AUDIO..........................................................................125

System Description..................................................125

Base Audio System.............................................125

Premium Audio System.......................................125

Wiring Diagram — AUDIO —..................................126

Trouble Diagnoses...................................................129

Inspection.................................................................130

AUDIO ANTENNA .......................................................132

Fixed Antenna Rod Replacement............................132

Removal..............................................................132

Installation...........................................................132

POWER DOOR MIRROR............................................133

Wiring Diagram — MIRROR —...............................133

AUTOMATIC SPEED CONTROL DEVICE (ASCD)....134

Component Parts and Harness Connector

Location ...................................................................134

System Description..................................................135

Schematic................................................................137

Wiring Diagram — ASCD — ...................................138

Fail-Safe System Description..................................142

Fail-Safe System Check..........................................143

Trouble Diagnoses...................................................144

ASCD Wire Adjustment ...........................................152

Electrical Components Inspection...........................153

POWER WINDOW.......................................................154

System Description..................................................154

Wiring Diagram — WINDOW — .............................156

Trouble Diagnoses...................................................158

POWER DOOR LOCK.................................................159

EL-2

CONTENTS (Cont’d.)

Component Parts and Harness Connector

Location ...................................................................159

System Description..................................................160

Schematic................................................................162

Wiring Diagram — D/LOCK —................................163

Trouble Diagnoses...................................................166

MULTI-REMOTE CONTROL SYSTEM .......................174

Component Parts and Harness Connector

Location ...................................................................174

System Description..................................................175

Schematic................................................................177

Wiring Diagram — MULTI —...................................178

Trouble Diagnoses...................................................181

Electrical Components Inspection...........................187

ID Code Entry Procedure ........................................188

THEFT WARNING SYSTEM .......................................189

Component Parts and Harness Connector

Location ...................................................................189

System Description..................................................191

Schematic................................................................194

Wiring Diagram — THEFT —..................................195

Trouble Diagnoses...................................................198

SMART ENTRANCE CONTROL UNIT.......................209

Description...............................................................209

Input/Output Operation Signal.................................210

Schematic................................................................211

LOCATION OF ELECTRICAL UNITS.........................213

Engine Compartment...............................................213

Passenger Compartment.........................................214

HARNESS LAYOUT....................................................216

Outline......................................................................216

How to Read Harness Layout.................................217

Main Harness...........................................................218

Engine Room Harness ............................................220

Engine Control Harness ..........................................223

Engine No. 2 Harness .............................................225

Chassis and Tail Harness........................................226

Room Lamp Harness...............................................227

Door Harness...........................................................228

Air Bag Harness ......................................................229

BULB SPECIFICATIONS ............................................230

Headlamps...............................................................230

Exterior Lamps.........................................................230

Interior Lamps..........................................................230

WIRING DIAGRAM CODES (CELL CODES).............231

EL-3

IDX

PRECAUTIONS AND PREPARATION

Supplemental Restraint System (SRS) ‘‘AIR BAG’’

The Supplemental Restraint System ‘‘AIR BAG’’, used along with a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger in a frontal collision. The Supplemental Restraint System consists of air bag modules (located in the center of the steering wheel and in the instrument panel on the passenger side), a diagnosis sensor unit, a crash zone sensor, warning lamp, wiring harness and spiral cable. The vehicle is 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 instrument panel, near the ashtray. When the switch is turned to the ON position, the passenger air bag is enabled and could inflate in a frontal collision. When the switch is turned to the OFF position, the passenger air bag is disabled and will not inflate in a frontal collision. 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 by the passenger air bag deactivation switch. Information necessary to service the system is included in the RS section of this Service Manual.

WARNING:

●

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 performed by an authorized NISSAN dealer.

●

Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system.

●

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this Service Manual. SRS wiring harnesses are covered with yellow insulation either just before the harness connectors or on the complete harness, for easy identification.

●

The vehicle is 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 in a frontal collision. When the passenger air bag is switched ON, the passenger air bag is enabled and could inflate in a frontal collision. After SRS maintenance or repair, make sure the passenger air bag deactivation switch is in the same position (ON or OFF) as when the vehicle arrived for service.

EL-4

HARNESS CONNECTOR

Description

HARNESS CONNECTOR (TAB-LOCKING TYPE)

●

The tab-locking type connectors help prevent accidental looseness or disconnection.

●

The tab-locking type connectors are disconnected by pushing or lifting the locking tab(s). Refer to illustration below.

Refer to EL-6 for description of the slide-locking type connector.

CAUTION:

Do not pull the harness when disconnecting the connector.

[Example]

EL-5

SEL769DA

IDX

HARNESS CONNECTOR

Description (Cont’d)

HARNESS CONNECTOR (SLIDE-LOCKING TYPE)

●

A new style slide-locking connector is used on certain systems and components, especially those related to OBD.

●

The slide-locking type connectors help pervent incomplete locking and accidental looseness or disconnection.

●

The slide-locking type connectors are disconnected by pushing or pulling the slider. Refer to illustration below.

CAUTION:

●

Do not pull the harness or wires when disconnecting the connector.

●

Be careful not to damage the connector support bracket when disconnecting the connector.

[Example]

EL-6

AEL299C

STANDARDIZED RELAY

Description

NORMAL OPEN, NORMAL CLOSED AND MIXED TYPE RELAYS

Relays can be divided into three main types: normal open, normal closed and mixed type relays.

SEL881H

TYPES OF STANDARDIZED RELAYS

1M .................... 1 Make 2M .................... 2 Make

1T .................... 1 Transfer 1Mz1B .................... 1 Make 1 Break

EL-7

SEL882H

IDX

STANDARDIZED RELAY

Description (Cont’d)

EL-8

AEL672B

POWER SUPPLY ROUTING

Schematic

EL-9

IDX

AEL580C

POWER SUPPLY ROUTING

Schematic (Cont’d)

EL-10

AEL581C

POWER SUPPLY ROUTING

Wiring Diagram — POWER —

BATTERY POWER SUPPLY – IGNITION SW IN ANY POSITION

NOTE: For detailed ground distribution information, refer to ‘‘GROUND DISTRIBUTION’’, EL-17.

EL-11

IDX

AEL582C

POWER SUPPLY ROUTING

Wiring Diagram — POWER — (Cont’d)

EL-12

AEL264C

POWER SUPPLY ROUTING

Wiring Diagram — POWER — (Cont’d)

ACCESSORY POWER SUPPLY — IGNITION SW IN ‘‘ACC’’ OR ‘‘ON’’

NOTE: For detailed ground distribution information, refer to ‘‘GROUND DISTRIBUTION’’, EL-17.

EL-13

IDX

AEL265C

POWER SUPPLY ROUTING

Wiring Diagram — POWER — (Cont’d)

IGNITION POWER SUPPLY – IGNITION SW IN ‘‘ON’’AND/OR ‘‘START’’

NOTE: For detailed ground distribution information, refer to ‘‘GROUND DISTRIBUTION’’, EL-17.

EL-14

AEL266C

POWER SUPPLY ROUTING

Wiring Diagram — POWER — (Cont’d)

EL-15

IDX

AEL267C

POWER SUPPLY ROUTING

Fuse

a. If fuse is blown, be sure to eliminate cause of problem

before installing new fuse.

b. Use fuse of specified rating. Never use fuse of more than

specified rating.

c. Do not partially install fuse; always insert it into fuse

holder properly.

d. Remove fuse for ‘‘ELECTRICAL PARTS (BAT)’’ if vehicle is

not used for a long period of time.

SEL954J

Fusible Link

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:

●

If 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.

●

Never wrap outside of fusible link with vinyl tape. Impor-

AEL600B

tant: Never let fusible link touch any other wiring harness, vinyl or rubber parts.

SBF284E

Circuit Breaker Inspection

For example, when current is 30A, the circuit is broken within 8 to 20 seconds.

EL-16

GROUND DISTRIBUTION

Main Harness

EL-17

IDX

AEL300C

GROUND DISTRIBUTION

Main Harness (Cont’d)

EL-18

AEL301C

GROUND DISTRIBUTION

Engine Room Harness

EL-19

IDX

AEL302C

GROUND DISTRIBUTION

Engine Room Harness (Cont’d)

EL-20

AEL303C

GROUND DISTRIBUTION

Engine Control Harness

EL-21

IDX

AEL304C

GROUND DISTRIBUTION

Engine Control Harness (Cont’d)

EL-22

AEL305C

GROUND DISTRIBUTION

Generator Harness

EL-23

IDX

AEL306C

BATTERY

CAUTION:

If it becomes necessary to start the engine with a booster battery and jumper cables:

●

Use a 12-volt booster battery.

●

After connecting battery cables, ensure that they are tightly clamped to battery terminals for good contact.

●

Never add distilled water through the hole used to check specific gravity.

How to Handle Battery

METHODS OF PREVENTING OVER-DISCHARGE

The following precautions must be taken to prevent over-discharging a battery.

●

The battery surface (particularly its top) should always be kept clean and dry.

●

The terminal connections should be clean and tight.

●

At every routine maintenance, check the electrolyte level.

SEL711E

SEL712E

SEL459R

●

When the vehicle is not going to be used over a long period of time, disconnect the negative battery terminal. (If the vehicle has an extended storage switch, turn it off.)

●

Check the charge condition of the battery. Periodically check the specific gravity of the electrolyte. Keep a close check on charge condition to prevent overdischarge.

EL-24

BATTERY

How to Handle Battery (Cont’d)

CHECKING ELECTROLYTE LEVEL

WARNING:

Do not allow battery fluid to come in contact with skin, eyes, fabrics, or painted surfaces. After touching a battery, do not touch or rub youreyes until you have thoroughly washed your hands. If the acid contacts the eyes, skin or clothing, immediately flush with water for 15 minutes and seek medical attention. Normally the battery does not require additional water. However, when the battery is used under severe conditions, adding distilled water may be necessary during the battery life.

SEL001K

SEL005Z

●

Remove the cell plug using a suitable tool.

●

Add distilled water up to the MAX level.

SULPHATION

A battery will be completely discharged if it is left unattended for a long time and the specific gravity becomes less than 1.100. This may result in sulphation on the cell plates. To determineif a battery has been‘‘sulphated’’, note its voltageand current when charging it. As shown in the figure, less current and higher voltage are observed in the initial stage of charging sulphated batteries. A sulphated battery may sometimes be brought back into service by means of a long, slow charge, 12 hours or more, followed by a battery capacity test.

SPECIFIC GRAVITY CHECK

1. Read hydrometer and thermometer indications at eye level.

SEL442D

SEL006Z

●

When electrolyte level is too low, tilt battery case to raise it for easy measurement.

EL-25

IDX

BATTERY

How to Handle Battery (Cont’d)

2. Use the chart below to correct your hydrometer reading according to electrolyte temperature.

Hydrometer temperature correction

Battery electrolyte temperature °C (°F) Add to specific gravity reading

71 (160) 0.032 66 (150) 0.028 60 (140) 0.024 54 (129) 0.020 49 (120) 0.016 43 (110) 0.012 38 (100) 0.008

32 (90) 0.004 27 (80) 0 21 (70) −0.004 16 (60) −0.008 10 (50) −0.012

4 (39) −0.016

−1 (30) −0.020

−7 (20) −0.024

−12 (10) −0.028

−18 (0) −0.032

Corrected specific gravity Approximate charge condition

1.260 - 1.280 Fully charged

1.230 - 1.250 3/4 charged

1.200 - 1.220 1/2 charged

1.170 - 1.190 1/4 charged

1.140 - 1.160 Almost discharged

1.110 - 1.130 Completely discharged

EL-26

BATTERY

How to Handle Battery (Cont’d)

CHARGING THE BATTERY

CAUTION:

●

Do not ‘‘quick charge’’ a fully discharged battery.

●

Keep the battery away from open flame while it is being charged.

●

When connecting the charger, connectthe leads first, then turn on the charger. Do not turn on the charger first, as this may cause a spark.

●

If battery electrolyte temperature rises above 60°C (140°F), stop charging. Always charge battery at a temperature below 60°C (140°F).

Charging rates

Amps Time

50 25 10 5

Do not charge at more than 50 ampere rate. Note: The ammeter reading on your battery charger will auto-

matically decrease as the battery charges. This indicates that the voltage of the battery is increasing normally as the state of charge improves. The charging amps indicated above refer to initial charge rate.

●

If, after charging, the specific gravity of any two cells varies more than .050, the battery should be replaced.

●

After the battery is charged, always perform a capacity test to assure that the battery is serviceable.

1 hour 2 hours 5 hours 10 hours

Service Data and Specifications (SDS)

Applied area USA Canada Type 55D23R 65D26R Capacity V-AH 12-60 12-65 Cold cranking current A

(For reference value)

356 413

EL-27

IDX

STARTING SYSTEM

System Description

M/T MODELS

Power is supplied at all times:

●

through 40A fusible link (letter , located in the fuse and fusible link box)

●

to ignition switch terminal

With the ignition switch in the START position, power is supplied:

●

through terminal

●

to clutch interlock relay terminal

For models with theft warning system

With the ignition switch in the ON or START position, power is supplied:

●

through 7.5A fuse [No. , located in the fuse block (J/B)]

●

to theft warning relay terminal

With the ignition switch in the ON or START position, power is supplied:

●

through 10A fuse [No. , located in the fuse block (J/B)]

●

to clutch interlock relay terminal If the theft warning system is triggered, terminal of the smart entrance control unit and ground to the clutch interlock relay is interrupted. When the theft warning system is not operating and clutch pedal is depressed, ground is supplied:

●

from clutch interlock switch terminal

●

to theft warning relay terminal

●

through theft warning relay terminal

●

to clutch interlock relay terminal

For models without theft warning system

With the ignition switch in the ON or START position, power is supplied:

●

through 10A fuse [No. , located in the fuse block (J/B)]

●

to clutch interlock relay terminal When the clutch pedal is depressed, ground is supplied:

●

from clutch interlock switch terminal

●

to clutch interlock relay terminal

of the ignition switch

of the theft warning relay is grounded through terminal

Ground is supplied to clutch interlock switch terminal

through body grounds

M14

and

M68

The clutch interlock relay is energized and power is supplied:

●

from terminal

●

to terminal

of the clutch interlock relay

of the starter motor windings.

The starter motor plunger closes and provides a closed circuit between the battery and the starter motor. The starter motoris grounded to theengine block. With powerand ground supplied, crankingoccurs and the engine starts.

EL-28

STARTING SYSTEM

System Description (Cont’d)

A/T MODELS

Power is supplied at all times:

●

through 40A fusible link (letter , located in the fuse and fusible link box)

●

to ignition switch terminal With the ignition switch in the START position, power is supplied:

●

through terminal

●

to park/neutral position (PNP) relay terminal

For models with theft warning system

With the ignition switch in the ON or START position, power is supplied:

●

through 7.5A fuse [No. , located in the fuse block (J/B)]

●

to theft warning relay terminal With the ignition switch in the ON or START position, power is supplied:

●

through 10A fuse [No. , located in the fuse block (J/B)]

●

to PNP switch terminal With the selector lever in the P or N position, power is supplied:

●

from PNP switch terminal

●

to PNP relay terminal If the theft warning system is triggered, terminal of the smart entrance control unit and ground to the PNP relay is interrupted. When the theft warning system is not operating, ground is supplied:

●

from theft warning relay terminal

●

through theft warning relay terminal

●

to PNP relay terminal

For models without theft warning system

With the ignition switch in the ON or START position, power is supplied:

●

through 10A fuse [No. , located in the fuse block (J/B)]

●

to PNP switch terminal With the selector lever in the P or N position, power is supplied:

●

from PNP switch terminal

●

to PNP relay terminal

of the ignition switch

of the theft warning relay is grounded through terminal

Ground is supplied to PNP relay terminal The PNP relay is energized and power is supplied:

●

from terminal

●

to terminal The starter motor plunger closes and provides a closed circuit between the battery and the starter motor. The starter motoris grounded to theengine block. With powerand ground supplied, crankingoccurs and the engine starts.

of the PNP relay

of the starter motor windings.

through body grounds

E12

and

E54

THEFT WARNING SYSTEM

The theft warning system will interrupt ground to clutch interlock relay (M/T models) or PNP relay (A/T models) if the system is triggered. The starter motor will then not crank, and the engine will not start. Refer to ‘‘THEFT WARNING SYSTEM’’ (EL-189).

IDX

EL-29

M/T MODELS

STARTING SYSTEM

Wiring Diagram — START —

EL-30

AEL268C

+ 202 hidden pages