Nissan Pathfinder (2010 year). Instruction — part 606

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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 Instruction. 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 3 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.

Precaution Necessary for Steering Wheel Rotation After Battery Disconnect

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NOTE:

• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-

TEM).

• Remove and install all control units after disconnecting both battery cables with the ignition knob in the

″

LOCK

″

position.

• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.

If DTC is detected, perform trouble diagnosis according to self-diagnostic results.

For models equipped with the Intelligent Key system and NATS, an electrically controlled steering lock mech-

anism is adopted on the key cylinder.

For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and

steering wheel rotation will become impossible.

If steering wheel rotation is required when battery power is interrupted, follow the procedure below before

starting the repair operation.

OPERATION PROCEDURE

2010 Pathfinder

PRECAUTIONS

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1. Connect both battery cables.

NOTE:

Supply power using jumper cables if battery is discharged.

2. Use the Intelligent Key or mechanical key to turn the ignition switch to the

″

ACC

″

position. At this time, the

steering lock will be released.

3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be

rotated.

4. Perform the necessary repair operation.
5. When the repair work is completed, return the ignition switch to the

″

LOCK

″

position before connecting

the battery cables. (At this time, the steering lock mechanism will engage.)

6. Perform a self-diagnosis check of all control units using CONSULT-III.

2010 Pathfinder

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< PREPARATION >

PREPARATION

PREPARATION

PREPARATION

Special Service Tool

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Commercial Service Tool

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Tool number
(Kent Moore No.)
Tool name

Description

—
(—) Model GR-8
Multitasking Battery Diagnostic Sta-
tion

Tests Batteries, starting and charging system.
For operating instructions, refer to diagnostic
station instruction instruction.

AWIIA1239ZZ

Tool name

Description

Power tool

Loosening bolts and nuts

PBIC0190E

2010 Pathfinder

DIAGNOSIS AND REPAIR WORKFLOW

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BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

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OVERALL SEQUENCE

DETAILED FLOW

AWBIA0755GB

2010 Pathfinder

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< BASIC INSPECTION >

DIAGNOSIS AND REPAIR WORKFLOW

NOTE:

To ensure a complete and thorough diagnosis, the battery, starter motor and generator test segments must be

done as a set from start to finish.

1.

DIAGNOSIS WITH MULTITASKING BATTERY DIAGNOSTIC STATION

Perform the starting system test with multitasking battery diagnostic station. For details and operating instruc-

tions, refer to diagnostic station instruction instruction.
Test result

CRANKING NORMAL>>GO TO 2

LOW VOLTAGE>>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 diagnostic station instruction instruction.

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

battery test again. Refer to diagnostic station instruction instruction. If second test result is

“REPLACE BATTERY”, then do so. Perform battery test again to confirm repair.

2.

CRANKING CHECK

Check that the starter motor operates properly.
Does the engine crank normally?

YES

>> GO TO 3

NO

>> GO TO 4

3.

ENGINE START CHECK

Check that the engine starts.
Does the engine start?

YES

>> Starter motor is OK. Inspection end.

NO

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

sections. Once resolved, perform battery test again.

4.

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.

NO

>> GO TO 7

5.

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

NO

>> GO TO 6

6.

STARTER OPERATION

Check the starter operation.
Does the starter motor turn smoothly?

YES

>> Starter motor is OK. Inspection end.

NO

>> GO TO 7

7.

“B” TERMINAL CIRCUIT INSPECTION

Check “B” terminal circuit. Refer to

STR-10, "Diagnosis Procedure"

.

Is “B” terminal circuit normal?

Engine coolant temperature [

°

C (

°

F)]

Voltage [V]

−

30 to

−

20 (

−

22 to

−

4)

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

2010 Pathfinder

DIAGNOSIS AND REPAIR WORKFLOW

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YES

>> GO TO 8

NO

>> Repair as needed.

8.

“S” CONNECTOR CIRCUIT INSPECTION

Check “S” connector circuit. Refer to

STR-12, "Diagnosis Procedure - VQ40DE"

(VQ40DE) or

STR-13, "Diag-

nosis Procedure - VK56DE"

(VK56DE).

Is “S” connector circuit normal?

YES

>> GO TO 9

NO

>> Repair as needed.

9.

ENGINE ROTATION STATUS

Check that the engine can be rotated by hand.
Does the engine turn freely by hand?

YES

>> Replace starter motor. Refer to

STR-24, "Removal and Installation"

.

NO

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

sections. Once resolved, perform battery test again. Refer to diagnostic station instruction man-

ual.

2010 Pathfinder

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< FUNCTION DIAGNOSIS >

STARTING SYSTEM

FUNCTION DIAGNOSIS

STARTING SYSTEM

System Diagram

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System Description

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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

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ALBIA0416GB

1.

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

2.

IPDM E/R E120, E122, E124

3.

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

AWBIA0127ZZ

2010 Pathfinder

STARTING SYSTEM

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Component Description

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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.

2010 Pathfinder