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 “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.

WARNING:

Always observe the following items for preventing accidental activation.
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in

the event of a collision that 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 “SRS AIR BAG”.

• Never use electrical test equipment on any circuit related to the SRS unless instructed to in this Ser-

vice Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness
connectors.

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

WARNING:

Always observe the following items for preventing accidental activation.
• When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the

ignition ON or engine running, never 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 3 minutes before performing any service.

Precaution for Battery Service

INFOID:0000000008462671

Before disconnecting the battery, lower both the driver and passenger windows. This will prevent any interfer-
ence between the window edge and the vehicle when the door is opened/closed. During normal operation, the
window slightly raises and lowers automatically to prevent any window to vehicle interference. The automatic
window function will not work with the battery disconnected.

Service Procedure Precautions for Models with a Pop-up Roll Bar

INFOID:0000000008462672

WARNING:

Always observe the following items for preventing accidental activation.
• Risk of passenger injury or death may increase if the pop-up roll bar does not deploy during a roll

over collision. In order to reduce the chance of an incident where the pop-up roll bar is inoperative,
all maintenance must be performed by a NISSAN or INFINITI dealer.

• Before removing and installing the pop-up roll bar component parts and harness, always turn the

ignition switch OFF, disconnect the battery negative terminal, and wait for 3 minutes or more. (The
purpose of this operation is to discharge electricity that is accumulated in the auxiliary power supply
circuit in the air bag diagnosis sensor unit.)

• When repairing, removing, and installing a pop-up roll bar, always refer to SRS AIR BAG and SRS

AIR BAG CONTROL warnings in the Service Manual.

Precaution for Power Generation Voltage Variable Control System

INFOID:0000000008462673

CAUTION:

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CHG-4

< PRECAUTION >

PRECAUTIONS

For this model, the battery current sensor that is installed to the battery cable at the negative terminal
measures the charging/discharging current of the battery, and performs various controls. If the electri-
cal component or the ground wire is connected directly to the battery terminal, the current other than
that being measured with the battery current sensor is charging to or discharging from the battery.
This condition causes the malfunction of the control, and then the battery discharge may occur. Do
not connect the electrical component or the ground wire directly to the battery terminal.

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PREPARATION

CHG-5

< PREPARATION >

PREPARATION

Special Service Tools

INFOID:0000000008954758

Commercial Service Tools

INFOID:0000000008462675

Tool number

(Kent-Moore No.)

Tool name

Description

—
(—) Model GR8-1200 NI
Multitasking battery and electrical di-
agnostic station

Tests batteries, starting and charging sys-
tems and charges batteries.
For operating instructions, refer to diagnos-
tic station instruction manual.

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

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

AWIIA1239ZZ

JSMIA0806ZZ

Tool name

Description

Power tool

Loosening bolts, nuts and screws

PIIB1407E

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< SYSTEM DESCRIPTION >

COMPONENT PARTS

SYSTEM DESCRIPTION

COMPONENT PARTS

CHARGING SYSTEM

CHARGING SYSTEM : Component Parts Location

INFOID:0000000008462676

CHARGING SYSTEM : Component Description

INFOID:0000000008462677

POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM

POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM : Component
Parts Location

INFOID:0000000008462678

Alternator

Charge warning lamp

Cylinder block left side

Combination meter

JPLIA0887ZZ

Component part

Description

Alternator

The alternator provides DC voltage to operate the vehicle's electri-
cal system and to keep the battery charged.

Combination meter (Charge warning lamp)

The IC voltage regulator warning function activates to illuminate
the charge warning lamp, if any of the following symptoms occurs
while alternator is operating:
• Excessive voltage is produced.
• No voltage is produced.

JPLIA0888ZZ

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COMPONENT PARTS

CHG-7

< SYSTEM DESCRIPTION >

POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM : Component De-
scription

INFOID:0000000008462679

ECM
Refer to

EC-15, "ENGINE CON-

TROL SYSTEM : Component Parts
Location"

IPDM E/R
Refer to

PCS-4, "Component Parts

Location"

Battery current sensor

Alternator

Engine room dash panel (LH)

Battery

Cylinder block left side

Component

Function

Battery current sensor

Battery current sensor is installed to the battery cable at the negative terminal, and it detects
the charging/discharging current of the battery and sends the voltage signal to ECM accord-
ing to the current value.

ECM

ECM judges whether to perform the power generation voltage variable control according to
the battery condition.
When performing the power generation voltage variable control, ECM calculates the target
power generation voltage according to the battery condition and sends the calculated value
as the power generation command value signal to IPDM E/R.

IPDM E/R

IPDM E/R converts the received power generation command value into the power generation
command signal (PWM signal) and sends it to the IC voltage regulator.

Alternator (IC voltage regulator)

IC voltage regulator controls the power generation voltage by the target power generation
voltage based on the received power generation command signal (PWM signal).
When there is no power generation command signal, the alternator performs the normal pow-
er generation according to the characteristic of the IC voltage regulator.

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< SYSTEM DESCRIPTION >

SYSTEM

SYSTEM

CHARGING SYSTEM

CHARGING SYSTEM : System Diagram

INFOID:0000000008462680

CHARGING SYSTEM : System Description

INFOID:0000000008462681

The voltage output is controlled by the IC voltage regulator.

POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM

POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM : System Dia-
gram

INFOID:0000000008462682

POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM : System De-

JPMIA0426GB

JMMIA1072GB

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SYSTEM

CHG-9

< SYSTEM DESCRIPTION >

scription

INFOID:0000000008462683

By performing the power generation voltage variable control, the engine load due to the power generation of
the alternator is reduced and fuel consumption is decreased.
NOTE:
When any malfunction is detected in the power generation voltage variable control system, the power genera-
tion is performed according to the characteristic of the IC voltage regulator of the alternator.

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< WIRING DIAGRAM >

CHARGING SYSTEM

WIRING DIAGRAM

CHARGING SYSTEM

Wiring Diagram

INFOID:0000000008462684

For connector terminal arrangements, harness layouts, and alphabets in a

(option abbreviation; if not

described in wiring diagram), refer to

GI-12, "Connector Information"

JCMWA8072GB

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DIAGNOSIS AND REPAIR WORK FLOW

CHG-11

< BASIC INSPECTION >

BASIC INSPECTION

DIAGNOSIS AND REPAIR WORK FLOW

Work Flow (With EXP-800 NI or GR8-1200 NI)

INFOID:0000000008954759

CHARGING SYSTEM DIAGNOSIS WITH EXP-800 NI OR GR8-1200 NI

To test the charging system, use the following special service tools:
• EXP-800 NI Battery and electrical diagnostic analyzer
• GR8-1200 NI Multitasking battery and electrical diagnostic station
NOTE:
Refer to the applicable Instruction Manual for proper charging system diagnosis procedures.

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< BASIC INSPECTION >

DIAGNOSIS AND REPAIR WORK FLOW

OVERALL SEQUENCE

DETAILED FLOW

NOTE:
To ensure a complete and thorough diagnosis, the battery, starter and alternator test segments must be done
as a set from start to finish.

PRELIMINARY INSPECTION

Perform the preliminary inspection. Refer to

CHG-18, "Inspection Procedure"

JMMIA1147GB

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DIAGNOSIS AND REPAIR WORK FLOW

CHG-13

< BASIC INSPECTION >

>> GO TO 2.

STOP POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM

Stop the operation of the power generation voltage variable control in either of the following procedures.
• After selecting “ENGINE” of “SELECT SYSTEM” using CONSULT, set the DUTY value of “ALTERNATOR

DUTY” to 0 % by selecting “ALTERNATOR DUTY” of “Active Test”. Continue “Active Test” until the end of
inspection. (When the DUTY value is 0 or 100 %, the normal power generation is performed according to the
characteristic of the IC voltage regulator of the alternator.)

• Turn the ignition switch OFF, and disconnect the battery current sensor connector. [However, DTC (P1550 -

P1554) of the engine might remain. After finishing the inspection, connect the battery current sensor connec-
tor and erase the self-diagnosis results history of the engine using CONSULT.]

>> GO TO 3.

DIAGNOSIS WITH EXP-800 NI OR GR8-1200 NI

Perform the charging system test using Multitasking battery and electrical diagnostic station GR8-1200 NI or
Battery and electrical diagnostic analyzer EXP-800 NI. Refer to the applicable Instruction Manual for proper
testing procedures.
Test result

NO PROBLEMS>>Charging system is normal and will also show “DIODE RIPPLE” test result.
NO VOLTAGE>>GO TO 4.
LOW VOLTAGE>>GO TO 12.
HIGH VOLTAGE>>GO TO 14.
EXCESSIVE RIPPLE, OPEN PHASE, OPEN DIODE or SHORTED DIODE>>Replace the alternator. Per-

form “DIODE RIPPLE” test again using Multitasking battery and electrical diagnostic station GR8-
1200 NI or Battery and electrical diagnostic analyzer EXP-800 NI to confirm repair.

INSPECTION WITH CHARGE WARNING LAMP (IGNITION SWITCH IS ON)

Turn the ignition switch ON.

Does the charge warning lamp illuminate?

YES

>> GO TO 6.

>> GO TO 5.

“L” TERMINAL CIRCUIT (OPEN) INSPECTION

Check “L” terminal circuit (open). Refer to

CHG-22, "Diagnosis Procedure"

Is the “L” terminal circuit normal?

YES

>> Replace alternator. Refer to

CHG-27, "Removal and Installation"

>> Repair as needed.

INSPECTION WITH CHARGE WARNING LAMP (IDLING)

Start the engine and run it at idle.

Does the charge warning lamp turn OFF?

YES

>> GO TO 9.

>> GO TO 7.

“L” TERMINAL CIRCUIT (SHORT) INSPECTION

Check “L” terminal circuit (short). Refer to

CHG-23, "Diagnosis Procedure"

Is the “L” terminal circuit normal?

YES

>> GO TO 8.

>> Repair as needed.

“S” TERMINAL CIRCUIT INSPECTION

Check “S” terminal circuit. Refer to

CHG-24, "Diagnosis Procedure"

Is the “S” terminal circuit normal?

YES

>> GO TO 10.

>> Repair as needed.

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< BASIC INSPECTION >

DIAGNOSIS AND REPAIR WORK FLOW

INSPECTION WITH CHARGE WARNING LAMP (ENGINE AT 3,000 RPM)

Increase and maintain the engine speed at 3,000 rpm.
Does the charge warning lamp remain off?

YES

>> GO TO 11.

>> GO TO 10.

10.

INSPECTION OF ALTERNATOR PULLEY

Check alternator pulley. Refer to

CHG-28, "Inspection"

Is alternator pulley normal?

YES

>> Replace alternator. Refer to

CHG-27, "Removal and Installation"

>> Repair as needed.

11.

“B” TERMINAL CIRCUIT INSPECTION

Check “B” terminal circuit. Refer to

CHG-21, "Diagnosis Procedure"

Is “B” terminal circuit normal?

YES

>> Replace alternator. Refer to

CHG-27, "Removal and Installation"

>> Repair as needed.

12.

“B” TERMINAL CIRCUIT INSPECTION

Check “B” terminal circuit. Refer to

CHG-21, "Diagnosis Procedure"

Is “B” terminal circuit normal?

YES

>> GO TO 13.

>> Repair as needed.

13.

INSPECTION OF ALTERNATOR PULLEY

Check alternator pulley. Refer to

CHG-28, "Inspection"

Is alternator pulley normal?

YES

>> Replace alternator. Refer to

CHG-27, "Removal and Installation"

>> Repair as needed.

14.

“S” TERMINAL CIRCUIT INSPECTION

Check “S” terminal circuit. Refer to

CHG-24, "Diagnosis Procedure"

Is the “S” terminal circuit normal?

YES

>> Replace alternator. Refer to

CHG-27, "Removal and Installation"

>> Repair as needed.

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DIAGNOSIS AND REPAIR WORK FLOW

CHG-15

< BASIC INSPECTION >

Work Flow (Without EXP-800 NI or GR8-1200 NI)

INFOID:0000000008954760

OVERALL SEQUENCE

DETAILED FLOW

PRELIMINARY INSPECTION

Perform the preliminary inspection. Refer to

CHG-18, "Inspection Procedure"

JMMIA1148GB

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CHG-16

< BASIC INSPECTION >

DIAGNOSIS AND REPAIR WORK FLOW

>> GO TO 2.

STOP POWER GENERATION VOLTAGE VARIABLE CONTROL SYSTEM

• Turn the ignition switch OFF, and disconnect the battery current sensor connector. [However, DTC (P1550 -

P1554) of the engine might remain. After finishing the inspection, connect the battery current sensor connec-
tor and erase the self-diagnostic results history of the engine using CONSULT.]

>> GO TO 3.

INSPECTION WITH CHARGE WARNING LAMP (IGNITION SWITCH IS TURNED ON)

When ignition switch is turned ON
Does the charge warning lamp illuminate?

YES

>> GO TO 4.

>> GO TO 10.

INSPECTION WITH CHARGE WARNING LAMP (IDLING)

Start the engine and run it at idle.

Does the charge warning lamp turn OFF?

YES

>> GO TO 5.

>> GO TO 6.

INSPECTION WITH CHARGE WARNING LAMP (ENGINE AT 2,500 RPM)

Increase and maintain the engine speed at 2,500 rpm.

Does the charge warning lamp illuminate?

YES

>> GO TO 8.

>> INSPECTION END

“L” TERMINAL CIRCUIT (SHORT) INSPECTION

Check “L” terminal circuit (short). Refer to

CHG-23, "Diagnosis Procedure"

Is the inspection result normal?

YES

>> GO TO 7.

>> Repair as needed.

“S” TERMINAL CIRCUIT INSPECTION

Check “S” terminal circuit. Refer to

CHG-24, "Diagnosis Procedure"

Is the inspection result normal?

YES

>> GO TO 8.

>> Repair as needed.

MEASURE “B” TERMINAL VOLTAGE

Start engine. With engine running at 2,500 rpm, measure “B” terminal voltage.

What voltage does the measurement result show?

Less than 13.0 V>>GO TO 9.
More than 16.0 V>>Replace alternator. Refer to

CHG-27, "Removal and Installation"

“B” TERMINAL CIRCUIT INSPECTION

Check “B” terminal circuit. Refer to

CHG-21, "Diagnosis Procedure"

Is the inspection result normal?

YES

>> Replace alternator. Refer to

CHG-27, "Removal and Installation"

>> Repair as needed.

10.

INSPECTION WITH CHARGE WARNING LAMP (IGNITION SWITCH IS ON)

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