Nissan Frontier. Manual - part 1046

PCS-28

< REMOVAL AND INSTALLATION >

[IPDM E/R]

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)

REMOVAL AND INSTALLATION

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE
ROOM)

Removal and Installation of IPDM E/R

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REMOVAL

CAUTION:

Do not remove the relays from the IPDM E/R. Tampering with the relays may cause additional incidents

with the vehicle.
1. Disconnect negative battery terminal. Refer to 

PG-83, "Removal and Installation"

.

2. Remove IPDM E/R upper cover.

3. Release 2 clips and pull IPDM E/R up from case.
4. Disconnect the harness connectors from IPDM E/R and remove.

INSTALLATION

Installation is in the reverse order of removal.

WKIA3352E

LKIA0421E

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PG-1

ELECTRICAL & POWER CONTROL

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SECTION 

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CONTENTS

POWER SUPPLY, GROUND & CIRCUIT ELEMENTS

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

2

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

2

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

2

Precaution for Power Generation Variable Voltage 
Control System ..........................................................

2

PREPARATION ............................................

3

PREPARATION ...................................................

3

Special Service Tool  .................................................

3

Commercial Service Tool  ..........................................

3

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

4

BATTERY ............................................................

4

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

4

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

4

INSPECTION AND ADJUSTMENT .....................

7

ADDITIONAL SERVICE WHEN REMOVING BAT-
TERY NEGATIVE TERMINAL .....................................

7

ADDITIONAL SERVICE WHEN REMOVING 
BATTERY NEGATIVE TERMINAL : Special Re-
pair Requirement .......................................................

7

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

8

POWER SUPPLY ROUTING CIRCUIT ...............

8

Wiring Diagram—Battery Power Supply  ...................

8

Wiring Diagram—Accessory Power Supply  ............

17

Wiring Diagram—Ignition Power Supply  .................

20

Fuse ........................................................................

26

Fusible Link  .............................................................

26

GROUND ...........................................................

27

Ground Distribution ..................................................

27

HARNESS .........................................................

39

Harness Layout  .......................................................

39

ELECTRICAL UNITS LOCATION  ....................

71

Electrical Units Location  ..........................................

71

HARNESS CONNECTOR  .................................

74

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

74

STANDARDIZED RELAY  .................................

77

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

77

FUSE BLOCK - JUNCTION BOX (J/B)  ............

79

Terminal Arrangement .............................................

79

FUSE, FUSIBLE LINK AND RELAY BOX ........

80

Terminal Arrangement .............................................

80

FUSE AND RELAY BOX  ..................................

81

Terminal Arrangement .............................................

81

IPDM E/R (INTELLIGENT POWER DISTRI-
BUTION MODULE ENGINE ROOM)  ................

82

IPDM E/R Terminal Arrangement ............................

82

REMOVAL AND INSTALLATION ...............

83

BATTERY ..........................................................

83

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

83

SERVICE DATA AND SPECIFICATIONS 
(SDS) ............................................................

84

SERVICE DATA AND SPECIFICATIONS 
(SDS) .................................................................

84

Battery .....................................................................

84

PG-2

< PRECAUTION >

PRECAUTIONS

PRECAUTION

PRECAUTIONS

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

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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 SR and SB section of this Service Man-

ual.

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 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 the SR section.

• 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 har-

ness connectors.

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

WARNING:

• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-

tion ON or engine running, DO NOT 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 three minutes before performing any service.

Precaution for Power Generation Variable Voltage Control System

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CAUTION:

For this model, the battery current sensor that is installed to the negative battery cable measures the

charging/discharging current of the battery and performs various engine controls. If an electrical com-

ponent is connected directly to the negative battery terminal, the current flowing through that compo-

nent will not be measured by the battery current sensor. This condition may cause a malfunction of

the engine control system and battery discharge may occur. Do not connect an electrical component

or ground wire directly to the battery terminal.

PG

PREPARATION

PG-3

< PREPARATION >

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PREPARATION

PREPARATION

Special Service Tool

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The actual shape of the tools may differ from those illustrated here.

Commercial Service Tool

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Tool number
(TechMate No.)
Tool name

Description

—

( — ) Model GR8-1200 NI
Multitasking battery and electrical diag-
nostic station

Tests batteries, starting and charging 
systems and charges batteries.
For operating instructions, refer to diag-
nostic station instruction manual.

—

( — ) Model EXP-800 NI
Battery and electrical diagnostic analyzer

Tests batteries and charging systems.
For operating instructions, refer to diag-
nostic analyzer instruction manual.

AWIIA1239ZZ

JSMIA0806ZZ

Tool name

Description

Power tool

Loosening nuts, screws and bolts

PIIB1407E