Nissan March K13. Manual - part 397

HAC-122

< PRECAUTION >

[HEATER AND VENTILATION]

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 “SRS AIR BAG” and “SEAT BELT” 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 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 the “SRS AIR BAG”.

• 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 Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the

ignition 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 Necessary for Steering Wheel Rotation after Battery Disconnect

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NOTE:
• Before removing and installing any control units, first turn the push-button ignition switch to the LOCK posi-

tion, then disconnect both battery cables.

• After finishing work, confirm that all control unit connectors are connected properly, then re-connect both

battery cables.

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

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

For vehicle with steering lock unit, if the battery is disconnected or discharged, the steering wheel will lock and
cannot be turned.
If turning the steering wheel is required with the battery disconnected or discharged, follow the operation pro-
cedure below before starting the repair operation.

OPERATION PROCEDURE

1.

Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.

2.

Turn the push-button ignition switch to ACC position.
(At this time, the steering lock will be released.)

3.

Disconnect both battery cables. The steering lock will remain released with both battery cables discon-
nected and the steering wheel can be turned.

4.

Perform the necessary repair operation.

PRECAUTIONS

HAC-123

< PRECAUTION >

[HEATER AND VENTILATION]

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5.

When the repair work is completed, re-connect both battery cables. With the brake pedal released, turn
the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering
wheel will lock when the push-button ignition switch is turned to LOCK position.)

6.

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

HAC-124

< SYSTEM DESCRIPTION >

[HEATER AND VENTILATION]

COMPONENT PARTS

SYSTEM DESCRIPTION

COMPONENT PARTS

HEATER AND VENTILATION CONTROL SYSTEM

HEATER AND VENTILATION CONTROL SYSTEM : Component Part Location

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HEATER AND VENTILATION CONTROL SYSTEM : Component Description

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HEATER AND VENTILATION UNIT ASSEMBLY

1.

Heater control

2.

Blower motor

3.

Blower fan resistor

A.

Located in the right side of heater 
unit assembly

B.

Located in the left side of heater unit 
assembly

JMIIA0709ZZ

Component

Reference/Function

Heater control

Controls the heater control function.

Blower motor

XX-XX, "*****"

Blower fan resistor

XX-XX, "*****"

COMPONENT PARTS

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< SYSTEM DESCRIPTION >

[HEATER AND VENTILATION]

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HEATER AND VENTILATION UNIT ASSEMBLY : Blower Fan Resistor

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• Compact and lightweight resistor is adopted with outstanding venti-

lation. 

• Temperature fuse is installed to protects the blower motor circuit.

HEATER AND VENTILATION UNIT ASSEMBLY : Blower Motor

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• The blower motor (1) is installed in the RH side of A/C unit assem-

bly.

• The blower motor adopts the forcible air cooling system and one-

touch installation system without any screws.

: Vehicle front

JMIIA0704ZZ

: Vehicle front

JMIIA0703ZZ