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2017 Nissan Sentra (B17) Service & Repair Manual
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HAC-1
VENTILATION, HEATER & AIR CONDITIONER
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SECTION HAC
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CONTENTS
HEATER & AIR CONDITIONING CONTROL SYSTEM
AUTOMATIC AIR CONDITIONER
PRECAUTION .............................................. 5
PRECAUTIONS .................................................. 5
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .................................................................. 5
Precaution for Work ................................................. 5
Working with HFC-134a (R-134a) ............................ 5
Precaution for Service Equipment ............................ 6
PREPARATION ........................................... 8
PREPARATION .................................................. 8
Special Service Tool ................................................ 8
Commercial Service Tool ......................................... 8
SYSTEM DESCRIPTION ............................. 9
COMPONENT PARTS ....................................... 9
Component Part Location ........................................ 9
Component Description .......................................... 10
SYSTEM ............................................................12
System Diagram ..................................................... 12
System Description ................................................ 12
Air Flow Control ...................................................... 13
Air Inlet Control ...................................................... 14
Air Outlet Control .................................................... 15
Compressor Control ............................................... 15
Door Control ........................................................... 15
Temperature Control .............................................. 20
Fail-safe ................................................................. 20
OPERATION ......................................................21
Switch Name and Function .................................... 21
DIAGNOSIS SYSTEM (A/C AUTO AMP.) ........24
Description ............................................................. 24
CONSULT Function (HVAC) .................................. 24
DIAGNOSIS SYSTEM (BCM) ........................... 28
COMMON ITEM ........................................................28
COMMON ITEM : CONSULT Function (BCM -
COMMON ITEM) ....................................................28
AIR CONDITIONER ..................................................29
AIR CONDITIONER : CONSULT Function (BCM -
AIR CONDITIONER) ..............................................29
DIAGNOSIS SYSTEM (IPDM E/R) ................... 30
Diagnosis Description .............................................30
CONSULT Function (IPDM E/R) ............................31
ECU DIAGNOSIS INFORMATION ............. 34
A/C AUTO AMP. ............................................... 34
Reference Value .....................................................34
DTC Inspection Priority Chart ..............................38
DTC Index ..............................................................38
ECM, IPDM E/R, BCM ....................................... 40
List of ECU Reference ............................................40
WIRING DIAGRAM ..................................... 41
AUTOMATIC AIR CONDITIONING SYSTEM ... 41
Wiring Diagram .......................................................41
BASIC INSPECTION .................................. 51
DIAGNOSIS AND REPAIR WORKFLOW ........ 51
Work Flow ...............................................................51
OPERATION INSPECTION .............................. 53
Work Procedure ......................................................53
SYSTEM SETTING ........................................... 55
Temperature Setting Trimmer ................................55
Inlet Port Memory Function (FRE) ..........................55
Inlet Port Memory Function (REC) .........................56
Target Evaporator Temp Upper Limit .....................56
Revision: December 2014 2015 Sentra NAM

HAC-2
DOOR MOTOR STARTING POSITION RE-
SET ................................................................... 57
Description ............................................................. 57
Work Procedure ..................................................... 57
DTC/CIRCUIT DIAGNOSIS ........................ 58
U1000 CAN COMM CIRCUIT ........................... 58
Description ............................................................. 58
DTC Logic .............................................................. 58
Diagnosis Procedure ............................................. 58
U1010 CONTROL UNIT (CAN) ........................ 59
Description ............................................................. 59
DTC Logic .............................................................. 59
Diagnosis Procedure ............................................. 59
B2578, B2579 IN-VEHICLE SENSOR .............. 60
DTC Logic .............................................................. 60
Diagnosis Procedure ............................................. 60
Component Inspection ........................................... 61
B257B, B257C AMBIENT SENSOR ................ 63
DTC Logic .............................................................. 63
Diagnosis Procedure ............................................. 63
Component Inspection ........................................... 64
B2581, B2582 INTAKE SENSOR ..................... 66
DTC Logic .............................................................. 66
Diagnosis Procedure ............................................. 66
Component Inspection ........................................... 67
B2630, B2631 SUNLOAD SENSOR ................ 69
DTC Logic .............................................................. 69
Diagnosis Procedure ............................................. 69
Component Inspection ........................................... 70
B27A2, B27A3, B27A4, B27A5 AIR MIX
DOOR MOTOR (DRIVER SIDE) ....................... 72
DTC Logic .............................................................. 72
Diagnosis Procedure ............................................. 72
Component Inspection ........................................... 73
B27AA, B27AB, B27AC, B27AD AIR MIX
DOOR MOTOR (PASSENGER SIDE) .............. 74
DTC Logic .............................................................. 74
Diagnosis Procedure ............................................. 74
Component Inspection ........................................... 75
B27A6, B27A7, B27A8, B27A9 MODE DOOR
MOTOR ............................................................. 77
DTC Logic .............................................................. 77
Diagnosis Procedure ............................................. 77
Component Inspection ........................................... 78
B27A0, B27A1 INTAKE DOOR MOTOR ......... 79
DTC Logic .............................................................. 79
Diagnosis Procedure ............................................. 79
Component Inspection (PBR) ................................ 81
Component Inspection (Motor) .............................. 82
POWER SUPPLY AND GROUND CIRCUIT .... 83
A/C AUTO AMP. ....................................................... 83
A/C AUTO AMP. : Diagnosis Procedure ................ 83
A/C SWITCH ASSEMBLY ........................................ 83
A/C SWITCH ASSEMBLY : Component Function
Check ..................................................................... 83
A/C SWITCH ASSEMBLY : Diagnosis Procedure ... 84
A/C SWITCH ASSEMBLY SIGNAL CIRCUIT ... 85
Diagnosis Procedure .............................................. 85
A/C ON SIGNAL ............................................... 86
Component Function Check .................................. 86
Diagnosis Procedure .............................................. 86
BLOWER FAN ON SIGNAL ............................. 88
Component Function Check .................................. 88
Diagnosis Procedure .............................................. 88
BLOWER MOTOR ............................................ 90
Diagnosis Procedure .............................................. 90
Component Inspection (Blower Motor) .................. 92
Component Inspection (Blower Motor Relay) ........ 93
MAGNET CLUTCH ........................................... 94
Component Function Check .................................. 94
Diagnosis Procedure .............................................. 94
ECV (ELECTRICAL CONTROL VALVE) ......... 95
Diagnosis Procedure .............................................. 95
Component Inspection ........................................... 96
SYMPTOM DIAGNOSIS ............................ 97
HEATER AND AIR CONDITIONING SYSTEM
CONTROL SYMPTOMS ................................... 97
Diagnosis Chart By Symptom ................................ 97
INSUFFICIENT COOLING ................................ 99
Description ............................................................. 99
Diagnosis Procedure .............................................. 99
INSUFFICIENT HEATING ............................... 101
Description ........................................................... 101
Diagnosis Procedure ............................................ 101
COMPRESSOR DOES NOT OPERATE ......... 102
Description ........................................................... 102
Diagnosis Procedure ............................................ 102
REMOVAL AND INSTALLATION ............. 104
A/C SWITCH ASSEMBLY ............................... 104
Removal and Installation ...................................... 104
A/C AUTO AMP. .............................................. 105
Exploded View ..................................................... 105
Removal and Installation ...................................... 105
AMBIENT SENSOR ......................................... 106
Removal and Installation ...................................... 106
Revision: December 2014 2015 Sentra NAM

HAC-3
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IN-VEHICLE SENSOR .................................... 107
Removal and Installation ...................................... 107
SUNLOAD SENSOR ....................................... 108
Removal and Installation ...................................... 108
INTAKE SENSOR ........................................... 109
Removal and Installation ...................................... 109
REFRIGERANT PRESSURE SENSOR .......... 110
Removal and Installation ...................................... 110
DOOR MOTOR ................................................ 111
Exploded View ..................................................... 111
INTAKE DOOR MOTOR ......................................... 112
INTAKE DOOR MOTOR : Removal and Installa-
tion ....................................................................... 112
MODE DOOR MOTOR ........................................... 112
MODE DOOR MOTOR : Removal and Installation .. 112
AIR MIX DOOR MOTOR ........................................ 112
AIR MIX DOOR MOTOR : Removal and Installa-
tion - Air Mix Door Motor RH ................................ 112
AIR MIX DOOR MOTOR : Removal and Installa-
tion - Air Mix Door Motor LH ................................. 112
POWER TRANSISTOR ................................... 113
Removal and Installation ...................................... 113
MANUAL AIR CONDITIONER
PRECAUTION ........................................... 114
PRECAUTIONS ............................................... 114
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. 114
Precaution for Work ............................................. 114
Working with HFC-134a (R-134a) ........................ 114
Precaution for Service Equipment ........................ 115
PREPARATION ........................................ 117
PREPARATION ............................................... 117
Special Service Tool ............................................ 117
Commercial Service Tool ..................................... 117
SYSTEM DESCRIPTION .......................... 118
COMPONENT PARTS .................................... 118
Component Part Location .................................... 118
Component Description ........................................ 119
SYSTEM .......................................................... 121
System Diagram ................................................... 121
System Description .............................................. 121
Air Flow Control .................................................... 122
Air Inlet Control .................................................... 122
Air Outlet Control .................................................. 122
Compressor Control ............................................. 122
Door Control ......................................................... 123
Temperature Control ............................................ 126
OPERATION ................................................... 127
Switch Name and Function ................................... 127
DIAGNOSIS SYSTEM (BCM) (WITH INTELLI-
GENT KEY SYSTEM) ..................................... 129
COMMON ITEM ...................................................... 129
COMMON ITEM : CONSULT Function (BCM -
COMMON ITEM) .................................................. 129
AIR CONDITIONER ................................................ 130
AIR CONDITIONER : CONSULT Function (BCM -
AIR CONDITIONER) ............................................ 130
DIAGNOSIS SYSTEM (BCM) (WITHOUT IN-
TELLIGENT KEY SYSTEM) ........................... 131
COMMON ITEM ...................................................... 131
COMMON ITEM : CONSULT Function (BCM -
COMMON ITEM) .................................................. 131
AIR CONDITIONER ................................................ 132
AIR CONDITIONER : CONSULT Function (BCM -
AIR CONDITIONER) ............................................ 132
DIAGNOSIS SYSTEM (IPDM E/R) (WITH IN-
TELLIGENT KEY SYSTEM) ........................... 133
Diagnosis Description ........................................... 133
CONSULT Function (IPDM E/R) .......................... 134
DIAGNOSIS SYSTEM (IPDM E/R) (WITHOUT
INTELLIGENT KEY SYSTEM) ........................ 137
Diagnosis Description ........................................... 137
CONSULT Function (IPDM E/R) .......................... 138
ECU DIAGNOSIS INFORMATION ........... 141
A/C AUTO AMP. ............................................. 141
Reference Value ................................................... 141
ECM, IPDM E/R, BCM ..................................... 144
List of ECU Reference .......................................... 144
WIRING DIAGRAM ................................... 145
MANUAL AIR CONDITIONING SYSTEM ....... 145
Wiring Diagram ..................................................... 145
MANUAL HEATER SYSTEM .......................... 152
Wiring Diagram ..................................................... 152
BASIC INSPECTION ................................ 156
DIAGNOSIS AND REPAIR WORKFLOW ...... 156
Work Flow ............................................................. 156
OPERATION INSPECTION ............................ 157
Work Procedure .................................................... 157
DTC/CIRCUIT DIAGNOSIS ...................... 159
Revision: December 2014 2015 Sentra NAM

HAC-4
POWER SUPPLY AND GROUND CIRCUIT .. 159
A/C AUTO AMP. ..................................................... 159
A/C AUTO AMP. : Diagnosis Procedure .............. 159
A/C SWITCH ASSEMBLY ...................................... 159
A/C SWITCH ASSEMBLY : Component Function
Check ................................................................... 159
A/C SWITCH ASSEMBLY : Diagnosis Procedure .. 160
MODE DOOR MOTOR ................................... 161
Diagnosis Procedure ............................................ 161
Component Inspection .......................................... 162
AIR MIX DOOR MOTOR ................................. 163
Diagnosis Procedure ............................................ 163
Component Inspection .......................................... 164
INTAKE DOOR MOTOR ................................. 165
Diagnosis Procedure ............................................ 165
Component Inspection (Motor) ............................. 166
A/C SWITCH ASSEMBLY SIGNAL CIRCUIT . 167
Diagnosis Procedure ............................................ 167
A/C ON SIGNAL ............................................. 168
Component Function Check ................................. 168
Diagnosis Procedure ............................................ 168
INTAKE SENSOR ........................................... 170
Diagnosis Procedure ............................................ 170
Component Inspection .......................................... 171
BLOWER FAN ON SIGNAL ........................... 172
Component Function Check ................................. 172
Diagnosis Procedure ............................................ 172
BLOWER MOTOR .......................................... 174
Diagnosis Procedure ............................................ 174
Component Inspection (Blower Motor) ................. 176
Component Inspection (Blower Motor Relay) ....... 177
MAGNET CLUTCH ......................................... 178
Component Function Check ................................. 178
Diagnosis Procedure ............................................ 178
ECV (ELECTRICAL CONTROL VALVE) ....... 179
Diagnosis Procedure ............................................ 179
Component Inspection .......................................... 180
SYMPTOM DIAGNOSIS ........................... 181
HEATER AND AIR CONDITIONING SYSTEM
CONTROL SYMPTOMS .................................. 181
Symptom Table .................................................... 181
INSUFFICIENT COOLING ............................... 182
Component Function Check ................................ 182
INSUFFICIENT HEATING ............................... 184
Component Function Check ................................ 184
COMPRESSOR DOES NOT OPERATE ......... 186
Description ........................................................... 186
Diagnosis Procedure ............................................ 186
REMOVAL AND INSTALLATION ............. 188
A/C ASSEMBLY SWITCH ............................... 188
Removal and Installation ...................................... 188
A/C AUTO AMP. .............................................. 189
Exploded View ..................................................... 189
Removal and Installation ...................................... 189
INTAKE SENSOR ............................................ 190
Removal and Installation ...................................... 190
REFRIGERANT PRESSURE SENSOR .......... 191
Removal and Installation ...................................... 191
DOOR MOTOR ................................................ 192
Exploded View ..................................................... 192
INTAKE DOOR MOTOR ........................................ 193
INTAKE DOOR MOTOR : Removal and Installa-
tion ....................................................................... 193
MODE DOOR MOTOR ........................................... 193
MODE DOOR MOTOR : Removal and Installation . 193
AIR MIX DOOR MOTOR ........................................ 193
AIR MIX DOOR MOTOR : Removal and Installa-
tion ....................................................................... 193
BLOWER MOTOR RESISTOR ....................... 194
Removal and Installation ...................................... 194
Revision: December 2014 2015 Sentra NAM

PRECAUTIONS
HAC-5
< PRECAUTION >
[AUTOMATIC AIR CONDITIONER]
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER" INFOID:0000000011538352
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. Information necessary to service the system safely is included in the SR and SB section 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 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 Work INFOID:0000000011538353
• When removing or disassembling each component, be careful not to damage or deform it. If a component
may be subject to interference, be sure to protect it with a shop cloth.
• When removing (disengaging) components with a screwdriver or similar tool, be sure to wrap the component
with a shop cloth or vinyl tape to protect it.
• Protect the removed parts with a shop cloth and prevent them from being dropped.
• Replace a deformed or damaged clip.
• If a part is specified as a non-reusable part, always replace it with a new one.
• Be sure to tighten bolts and nuts securely to the specified torque.
• After installation is complete, be sure to check that each part works properly.
• Follow the steps below to clean components:
- Water soluble dirt:
• Dip a soft cloth into lukewarm water, wring the water out of the cloth and wipe the dirty area.
• Then rub with a soft, dry cloth.
- Oily dirt:
• Dip a soft cloth into lukewarm water with mild detergent (concentration: within 2 to 3%) and wipe the dirty
area.
• Then dip a cloth into fresh water, wring the water out of the cloth and wipe the detergent off.
• Then rub with a soft, dry cloth.
- Do not use organic solvent such as thinner, benzene, alcohol or gasoline.
- For genuine leather seats, use a genuine leather seat cleaner.
Working with HFC-134a (R-134a) INFOID:0000000011538354
WARNING:
• CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. If the refrigerants
are mixed compressor failure is likely to occur. Refer to HA-25, "Inspection" . To determine the purity
of HFC-134a (R-134a) in the vehicle and recovery tank, use Refrigerant Recovery/Recycling Recharg-
ing equipment and Refrigerant Identifier.
Revision: December 2014 2015 Sentra NAM

HAC-6
< PRECAUTION >
[AUTOMATIC AIR CONDITIONER]
PRECAUTIONS
• Use only specified oil for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a) components. If
oil other than that specified is used, compressor failure is likely to occur.
• The specified HFC-134a (R-134a) oil rapidly absorbs moisture from the atmosphere. The following
handling precautions must be observed:
- When removing refrigerant components from a vehicle, immediately cap (seal) the component to
minimize the entry of moisture from the atmosphere.
- When installing refrigerant components to a vehicle, do not remove the caps (unseal) until just
before connecting the components. Connect all refrigerant loop components as quickly as possible
to minimize the entry of moisture into system.
- Only use the specified oil from a sealed container. Immediately reseal containers of oil. Without
proper sealing, oil will become moisture saturated and should not be used.
- Avoid breathing A/C refrigerant and oil vapor or mist. Exposure may irritate eyes, nose and throat.
Remove HFC-134a (R-134a) from the A/C system using certified service equipment meeting require-
ments of SAE J2210 [HFC-134a (R-134a) recycling equipment], or J2209 [HFC-134a (R-134a) recy-
cling equipment], If accidental system discharge occurs, ventilate work area before resuming
service. Additional health and safety information may be obtained from refrigerant and oil manufac-
turers.
- Do not allow A/C oil to come in contact with styrofoam parts. Damage may result.
CONTAMINATED REFRIGERANT
If a refrigerant other than pure HFC-134a (R-134a) is identified in a vehicle, your options are:
• Explain to the customer that environmental regulations prohibit the release of contaminated refrigerant into
the atmosphere.
• Explain that recovery of the contaminated refrigerant could damage your service equipment and refrigerant
supply.
• Suggest the customer return the vehicle to the location of previous service where the contamination may
have occurred.
• If you choose to perform the repair, recover the refrigerant using only dedicated equipment and contain-
ers. Do not recover contaminated refrigerant into your existing service equipment. If your facility does
not have dedicated recovery equipment, you may contact a local refrigerant product retailer for available ser-
vice. This refrigerant must be disposed of in accordance with all federal and local regulations. In addition,
replacement of all refrigerant system components on the vehicle is recommended.
• If the vehicle is within the warranty period, the air conditioner warranty is void. Please contact NISSAN Cus-
tomer Affairs for further assistance.
Precaution for Service Equipment INFOID:0000000011538355
MANIFOLD GAUGE SET
Be certain that the gauge face indicates R-134a or 134a. Make sure
the gauge set has 1/2″-16 ACME threaded connections for service
hoses. Confirm the set has been used only with refrigerant HFC-
134a (R-134a) along with specified oil.
SERVICE HOSES
SHA533D
Revision: December 2014 2015 Sentra NAM

PRECAUTIONS
HAC-7
< PRECAUTION >
[AUTOMATIC AIR CONDITIONER]
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Be certain that the service hoses display the markings described
(colored hose with black stripe). All hoses must include positive shut-
off devices (either manual or automatic) near the end of the hoses
opposite the manifold gauge.
SERVICE COUPLERS
Do not attempt to connect HFC-134a (R-134a) service couplers to a
CFC-12 (R-12) A/C system. The HFC-134a (R-134a) couplers will
not properly connect to the CFC-12 (R-12) system. However, if an
improper connection is attempted, discharging and contamination
may occur.
RHA272D
Shut-off valve rotation A/C service valve
Clockwise Open
Counterclockwise Close
RHA273D
Revision: December 2014 2015 Sentra NAM

HAC-8
< PREPARATION >
[AUTOMATIC AIR CONDITIONER]
PREPARATION
PREPARATION
PREPARATION
Special Service Tool INFOID:0000000011538356
The actual shape of the tools may differ from those illustrated here.
Commercial Service Tool INFOID:0000000011538357
Tool number
(TechMate No.)
Tool name
Description
—
(J-46534)
Trim Tool Set
Removing trim components
AWJIA0483ZZ
Tool name Description
Power tool Loosening nuts, screws and bolts
PIIB1407E
Revision: December 2014 2015 Sentra NAM

COMPONENT PARTS
HAC-9
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONER]
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SYSTEM DESCRIPTION
COMPONENT PARTS
Component Part Location INFOID:0000000011538358
ALIIA0703ZZ
Revision: December 2014 2015 Sentra NAM

HAC-10
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONER]
COMPONENT PARTS
Component Description INFOID:0000000011538359
1. ECM 2. IPDM E/R 3. BCM (view with instrument panel re-
moved)
4. A/C auto amp. (view with A/C switch
assembly removed)
5. A/C switch assembly 6. A/C Compressor
7. Refrigerant pressure sensor (view
with front bumper fascia removed)
8. Ambient sensor 9. Sunload sensor
10. In-vehicle sensor 11. Blower motor relay 12. Blower motor (view with front A/C
assembly removed from vehicle)
13. Air mix door motor RH 14. Mode door motor 15. Intake door motor
16. Air mix door motor LH 17. Intake sensor 18. Variable blower control
ALIIA0704ZZ
Component Description
A/C auto amp.
A/C auto amp. controls front automatic air conditioning system by inputting and calculating signals
from each sensor and each switch.
A/C Compressor
Vaporized refrigerant is drawn into the A/C compressor from the evaporator, where it is compressed
to a high pressure, high temperature vapor. The hot, compressed vapor is then discharged to the con-
denser.
A/C switch assembly
The A/C switch assembly controls the operation of the A/C and heating system based on inputs from
the temperature control knob, the mode switches, the blower control dial, the ambient temperature
sensor, the intake sensor, and inputs received from the ECM across the CAN. Diagnosis of the A/C
switch assembly can be performed using the CONSULT.
Air mix door motor LH
The air mix door controls the mix of hot or cold air that enters the ventilation system. It is controlled
by the A/C auto amp. based on the position of the temperature dial. The air mix door motor LH re-
ceives position commands from the A/C auto amp.
Air mix door motor RH
The air mix door controls the mix of hot or cold air that enters the ventilation system. It is controlled
by the A/C auto amp. based on the position of the temperature dial. The air mix door motor RH re-
ceives position commands from the A/C auto amp.
Ambient sensor
The ambient sensor measures the temperature of the air surrounding the vehicle. The sensor uses a
thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor
decreases as temperature increases.
BCM
The BCM receives the fan ON and A/C ON signals from the A/C auto amp. and sends a compressor
ON request to the ECM.
Blower motor The blower motor varies the speed at which the air flows through the ventilation system.
Blower motor relay
The blower motor relay controls the flow of current to fuse 20, 21 and 22 in the Fuse Block (J/B). The
relay is connected directly to ground, and is energized when the ignition switch is in the ON or START
position.
Revision: December 2014 2015 Sentra NAM
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This workshop manual contains maintenance and repair procedures for the 2017 Nissan Sentra B17. It also includes a wiring diagram.
Size: 359 MB
Format: .PDF