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.

Precaution for Power Generation Variable Voltage Control System

INFOID:0000000001303477

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.

PREPARATION

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< PREPARATION >

STR

PREPARATION

Special Service Tool

INFOID:0000000001281953

Commercial Service Tool

INFOID:0000000001281954

Tool number
(Kent Moore No.)
Tool name

Description

—
(J-48087)
Battery Service Center

Tests Battery.
For operating instructions, refer to Technical
Service Bulletin and Battery Service Center
User Guide.

—
(J-44373) Model 620
Starting/Charging system tester

Tests starting and charging systems.
For operating instructions, refer to Technical
Service Bulletin.

WKIA5280E

SEL403X

Tool name

Description

Power tool

Loosening bolts and nuts

PBIC0190E

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< BASIC INSPECTION >

DIAGNOSIS AND REPAIR WORKFLOW

BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

INFOID:0000000001714428

OVERALL SEQUENCE

DETAILED FLOW

ALBIA0417GB

DIAGNOSIS AND REPAIR WORKFLOW

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< BASIC INSPECTION >

STR

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

DIAGNOSIS WITH STARTING/CHARGING SYSTEM TESTER

Perform the starting system test with Starting/Charging System Tester (J-44373). For details and operating
instructions, refer to Technical Service Bulletin.

Test result

CRANKING VOLTAGE NORMAL>>GO TO 2
CRANKING VOLTAGE LOW>>GO TO 5
CHARGE BATTERY>>Perform the slow battery charging procedure. (Initial rate of charge is 10A for 12

hours.) Perform battery test again. Refer to Technical Service Bulletin.

REPLACE BATTERY>>Before replacing battery, clean the battery cable clamps and battery posts. Perform

battery test again. Refer to Technical Service Bulletin. If second test result is “REPLACE BAT-
TERY”, then do so. Perform battery test again to confirm repair.

CRANKING CHECK

Check that the starter motor operates properly.

Does the engine crank normally?

YES

>> GO TO 3

>> GO TO 4

ENGINE START CHECK

Check that the engine starts.

Does the engine start?

YES

>> Starter motor is OK. Inspection end.

>> Perform further diagnosis of engine mechanical or engine control system. Refer to EM and EC

sections. Once resolved, perform battery test again.

STARTER MOTOR ACTIVATION

Check that the starter motor operates.

Does the starter motor turn?

YES

>> Check ring gear and starter motor drive pinion. Once resolved, perform battery test again.

>> GO TO 7

COMPARISON BETWEEN ENGINE COOLANT AND CRANKING VOLTAGE

Compare the engine coolant temperature and verify the cranking voltage is within specification.

Minimum Specification of Cranking Voltage Referencing Coolant Temperature

Is the voltage less than the specified value?

YES

>> GO TO 7

>> GO TO 6

STARTER OPERATION

Check the starter operation.

Does the starter motor turn smoothly?

YES

>> Starter motor is OK. Inspection end.

>> GO TO 7

“B” TERMINAL CIRCUIT INSPECTION

Check “B” terminal circuit. Refer to

STR-9, "Diagnosis Procedure"

Is “B” terminal circuit normal?

Engine coolant temperature [

C (

F)]

Voltage [V]

−

30 to

−

20 (

−

22 to

−

8.6

−

19 to

−

10 (

−

2 to 14)

9.1

−

9 to 0 (16 to 32)

9.5

More than 1 (More than 34)

9.9

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< BASIC INSPECTION >

DIAGNOSIS AND REPAIR WORKFLOW

YES

>> GO TO 8

>> Repair as needed.

“S” CONNECTOR CIRCUIT INSPECTION

Check “S” connector circuit. Refer to

STR-10, "Diagnosis Procedure"

Is “S” connector circuit normal?

YES

>> GO TO 9

>> Repair as needed.

ENGINE ROTATION STATUS

Check that the engine can be rotated by hand.

Does the engine turn freely by hand?

YES

>> Replace starter motor.

>> Perform further diagnosis of engine mechanical or powertrain mechanism. Refer to EM or TM

sections. Once resolved, perform battery test again. Refer to Technical Service Bulletin.

STARTING SYSTEM

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< FUNCTION DIAGNOSIS >

STR

FUNCTION DIAGNOSIS

STARTING SYSTEM

System Diagram

INFOID:0000000001714429

System Description

INFOID:0000000001714430

The starter motor plunger closes and provides a closed circuit between the battery and the starter motor. The
starter motor is grounded to the cylinder block. With power and ground supplied, the starter motor operates.

Component Parts Location

INFOID:0000000001714431

ALBIA0416GB

A/T assembly F9 (with built in TCM
F502)

IPDM E/R E119, E120, E122, E124

BCM M18 (view with instrument panel
lower LH panel removed)

AWBIA0127ZZ

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< FUNCTION DIAGNOSIS >

STARTING SYSTEM

Component Description

INFOID:0000000001714432

Component part

Description

TCM

TCM supplies power to the starter relay inside the IPDM E/R
when the selector lever is shifted to the P or N position.

BCM

BCM sends a starter request signal to the CPU of the IPDM E/R
over the CAN communication lines.

IPDM E/R

CPU inside IPDM E/R operates the starter relay at the request of
the BCM over the CAN communication lines.

Starter motor

The starter motor plunger closes and the motor is supplied with
battery power, which in turn cranks the engine, when the “S” ter-
minal is supplied with electric power.

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