Qashqai J11. Heater & Air conditioning Control System

COMPONENT PARTS

HAC-241

< SYSTEM DESCRIPTION >

[MANUAL HEATER ]

HAC

• Direction of rotation is changeable by recomposing pattern of excitation.

A/C UNIT ASSEMBLY : Intake Door Motor

INFOID:0000000010499404

DESCRIPTION

• The step motor system is adopted for intake door motor.
• When a drive signal is input from A/C amp. to door motor, a step motor built into the door motor rotates

according to the drive signal, and then stops at the target door position.

• Rotation of motor is transmitted to intake door by lever, then air inlet is switched.

INTAKE DOOR MOTOR (DRIVER SIDE) DRIVE METHOD

• The 4 drive coils are excited in sequence in order to drive the motor.
• Direction of rotation is changeable by recomposing pattern of excitation.

A/C UNIT ASSEMBLY : Blower Motor

INFOID:0000000010499405

• Brush motor, that rotates coil while brush functions as contact

points, is adopted for blower motor.

• Rotation speed changes according to voltage from power transis-

tor.

JZIIA0033GB

JMIIA3565GB

JMIIA3336ZZ

HAC-242

< SYSTEM DESCRIPTION >

[MANUAL HEATER ]

COMPONENT PARTS

A/C UNIT ASSEMBLY : Fan Control Amp.

INFOID:0000000010499406

• Fan control amp., that uses MOS field effect transistor, is adopted

for blower motor speed control.
NOTE:
MOS field effect transistor is a transistor for which the gate portion
is composed of a metal electrode on an oxide layer of semiconduc-
tor. Field effect transistor is controlled by voltage, while ordinary
transistor is controlled by current. Electrode of field effect transistor
is called source, drain, or gate, while electrode of ordinary transis-
tor is called emitter, collector, or base.

• Fan control amp. continuously controls voltage to blower motor,

according to gate voltage from A/C amp.

• This power transistor does not require a HI relay even when the

maximum voltage is applied to blower motor at HI status, because voltage drop is nominal.

A/C UNIT ASSEMBLY : PTC Heater

INFOID:0000000010521012

• PTC heater is installed on passenger lower side of A/C unit assembly.
• Heat element is heated and air flow temperature is increased by

power supply from PTC relay.

Heater Control (A/C Amp.)

INFOID:0000000010499377

Heater control (A/C amp.) controls automatic air conditioning system
by inputting and calculating signals from each sensor and each
switch. A/C amp. has self-diagnosis function. Diagnosis of manual
heater system can be performed quickly.

JMIIA0793GB

JMIIA1317ZZ

JMIIA2397ZZ

JMIIA3575ZZ

HAC-244

< SYSTEM DESCRIPTION >

[MANUAL HEATER ]

SYSTEM

SYSTEM

MANUAL HEATER SYSTEM

MANUAL HEATER SYSTEM : System Description

INFOID:0000000010433405

SYSTEM DIAGRAM

DESCRIPTION

• Manual heater system is controlled by each function of A/C amp.and ECM.
• Each operation of heater system can be controlled by heater control (built-in A/C amp.).

CONTROL BY A/C AMP.

•

HAC-244, "MANUAL HEATER SYSTEM : Air Inlet Control"

•

HAC-245, "MANUAL HEATER SYSTEM : Door Control"

•

HAC-247, "MANUAL HEATER SYSTEM : Door Motor Starting Position Reset Control"

• Correction for input value

Ambient temperature correction

- A/C amp. inputs the temperature detected by ambient sensor as the ambient temperature.
- A/C amp. performs the correction of the temperature detected by ambient sensor for air conditioning control.
- A/C amp. selects and uses the initial value of ambient temperature data depending on the engine coolant

temperature when turning the ignition switch from OFF to ON. The detection temperature of the ambient
sensor is used when engine coolant temperature is low [less than approximately 56

C (133

F)]. The mem-

ory data (before the ignition switch is OFF) when the engine is warmed up [approximately 56

C (133

F) or

more].

- The correction of the ambient temperature is not performed when the detection temperature of the ambient

temperature is less than approximately

−

C (–4

F).

MANUAL HEATER SYSTEM : Air Inlet Control

INFOID:0000000010433409

DESCRIPTION

• A/C amp. controls the intake door motor and switches the air inlets.
• When the following conditions are met, A/C amp. controls the air inlets to 20% recirculation. (However, this

does not occur when high water temperature control is in effect.)
At this time, the intake switch indicator lamp turns OFF.

JMIIA3579GB

SYSTEM

HAC-245

< SYSTEM DESCRIPTION >

[MANUAL HEATER ]

HAC

- Fan control dial: 21th - 24th
- Temperature control dial: Full hot
- Air outlet mode: DF ON or DEF ON

HIGH ENGINE COOLANT TEMPERATURE CONTROL

When either of the following conditions is met, A/C amp. changes the air inlets to recirculation.

Condition 1

• Air outlet: Other than D/F or DEF
• Ambient temperature: More than 25

C (77

• Vehicle speed: 30 km/h or more
• Engine coolant temperature: 105

C (221

F) or more

Condition 2

• Air outlet: D/F or DEF
• Air inlet: Fresh air intake
• Ambient temperature: More than 25

C (77

• Vehicle speed: 30 km/h or more
• Engine coolant temperature: 105

C (221

F) or more

MANUAL HEATER SYSTEM : Door Control

INFOID:0000000010433411

SWITCH AND THEIR CONTROL FUNCTION

Intake door

Blower motor

Air conditioner filter

Heater core

PTC heater

Air mix door

Foot door

Side ventilator door

Sub defroster door

Center ventilator and defroster door

Fresh air

Recirculation air

Discharge air

JMIIA3580ZZ

HAC-246

< SYSTEM DESCRIPTION >

[MANUAL HEATER ]

SYSTEM

*1: Not applicable
*2: With rear foot duct
NOTE:
The sub-defroster and side ventilator door include a permanent opening and does not fully close.

*: Air inlet status is displayed by indicator during activating automatic control

AIR DISTRIBUTION

Without rear ventilator, without rear foot

Defroster

Center ventilator

Side ventilator

Rear ventilator

Front foot

Rear foot

Switch/dial position

Door position

Mode door

Intake door

Air mix

door

Cen

r ve

ila

r an

d d

ter

b d

r do

ila

tor

ot do

MODE VENT switch

VENT

—

MODE B/L switch

Bi-level (B/L)

MODE FOOT switch

FOOT

MODE D/F switch

DEF/FOOT (D/F)

MODE DEF switch

DEF

INTAKE switch

—

Temperature control dial

Full cold

—

Full cold – Full hot

Full hot

Discharge air flow

MODE position

Air outlet/distribution

Ventilator

Front foot

Defroster

Center

Side

V/D

40%

35%

—

25%

VENT

54%

46%

—

B/L

31%

40%

29%

—

ALL

21%

34%

31%

14%

FOOT

—

10%

58%

32%

D/F

—

43%

48%

DEF

—

10%

—

90%

SYSTEM

HAC-247

< SYSTEM DESCRIPTION >

[MANUAL HEATER ]

HAC

Without rear ventilator, with rear foot

MANUAL HEATER SYSTEM : Door Motor Starting Position Reset Control

INFOID:0000000010519453

• Step motors are used for the mode door motor air mix door motor, and intake door motor.
• Because the step motors do not have position detection mechanisms, there may be a deviation between the

door position recognized by A/C amp. and the actual door position.
Therefore, A/C amp. performs motor zero position reset for aligning its recognized door position with the
actual door position.

• The reset signal is transmitted from A/C amp. to the air mix door motor, mode door motor, and intake door

motor, which then perform zero position reset.

• After any of the following conditions is met, A/C amp. performs motor zero position reset when the ignition

switch is next turned ON.

- The ignition switch is turned from ON to OFF a total of 360 times.
- The ignition switch turns OFF while the mode door motor, air mix door motor, or intake door motor is operat-

ing.

• If A/C amp., air mix door motor, mode door motor, or intake door motor is removed, it is necessary to perform

motor zero position reset using CONSULT.

PTC HEATER CONTROL SYSTEM

PTC HEATER CONTROL SYSTEM : System Description

INFOID:0000000010502942

SYSTEM DIAGRAM

DESCRIPTION

• BCM performs PTC relay ON/OFF control based on engine speed, engine coolant temperature, electrical

power cut freeze signal (permission signal, retention signal, stop signal), blower motor operation state sig-
nal, front window defogger state signal, ambient temperature signal, battery voltage, and electrical load state
(high beam request, low beam request, and others).

Discharge air flow

MODE position

Air outlet/distribution

Ventilator

Foot

Defroster

Center

Side

Front

Rear

V/D

40%

35%

—

25%

VENT

54%

46%

—

B/L

33%

40%

16%

11%

—

ALL

22%

35%

16%

11%

16%

FOOT

—

11%

32%

25%

32%

D/F

—

24%

19%

49%

DEF

—

10%

—

90%

JMIIA3583GB

HAC-248

< SYSTEM DESCRIPTION >

[MANUAL HEATER ]

SYSTEM

• When PTC relay turns ON, power supply is supplied to PTC heater. Heating element is heated and air flow

temperature is increased. Heating is available for a period of time until engine coolant temperature is
increased when engine starts cold in cold climate.

• Idle up request signal is transmitted from BCM to ECM while PTC heater operates. Idle speed is increased,

warming-up is facilitated, and battery electric power is obtained.

• Electric power supplied to PTC heating element is subject to PTC relay control conditions.

NOTE:
PTC heater operation depends on ambient temperature and battery voltage. PTC heater is ON when ambient
temperature is 8

C or less. PTC heater is OFF when ambient temperature is 12

C (53.6

F) or more. PTC

heater is ON when battery voltage is 11.5 V or more. PTC heater is OFF when battery voltage is 11 V or less.

PTC heater

Operation

PTC relay-1

PTC relay-2

PTC relay-3

Electric power (W)

OFF

Approx. 0

PTC heater-1

LOW

OFF

Approx. 333

PTC heater-2

MID

OFF

Approx. 666

PTC heater-3

Approx. 999

OPERATION

HAC-249

< SYSTEM DESCRIPTION >

[MANUAL HEATER ]

HAC

OPERATION

Switch Name and Function

INFOID:0000000010433415

OPERATION AND DISPLAY OF AUTOMATIC AIR CONDITIONING SYSTEM

Operation: Heater control

MODE D/F switch

MODE FOOT switch

MODE B/L switch

MODE VENT switch

Fan control dial

MODE DEF switch

INTAKE switch

Temperature control dial

Switch name

Function

INTAKE switch

Air inlet changes between recirculation (REC)

⇔

fresh air intake (FRE) each time this switch is pressed.

• Switch indicator lamp ON: Recirculation
• Switch indicator lamp OFF: Fresh air intake

Fan control dial

The air flow can be manually set within the range of speeds 1st - 24th by operating the dial.

Temperature control
dial

The air flow temperature can be adjusted by operating the dial.
• Clockwise: Raise the air flow temperature.
• Counterclockwise: Lower the air flow temperature.

MODE VENT switch

• Air outlet mode is changed by pushing these switches.
• When MODE D/F switch or MODE DEF switch is pushed, air inlet is changed to fresh air intake (FRE)
• When MODE DEF switch is pushed while air outlet is set on DEF position, air outlet mode is controlled

to setting before air outlet is set to DEF position.

MODE B/L switch

MODE FOOT switch

MODE D/F switch

MODE DEF switch

JMIIA3581ZZ

HAC-250

< SYSTEM DESCRIPTION >

[MANUAL HEATER ]

DIAGNOSIS SYSTEM (A/C AMP.)

DIAGNOSIS SYSTEM (A/C AMP.)

Description

INFOID:0000000010433416

Air conditioning system performs self-diagnosis, operation check, function diagnosis, and various settings
using diagnosis function of each control unit.

CONSULT Function

INFOID:0000000010433417

CONSULT performs the following functions via CAN communication with A/C amp.

NOTE:
Diagnosis should be performed with engine running. Door motor operation speeds become slower and NO
results may be returned even for normal operation if battery voltage drops below 12 V during self-diagnosis.

ECU IDENTIFICATION

Part number of A/C amp. can be checked.

SELF-DIAGNOSIS RESULTS

Diagnosis result that is judged by A/C amp. can be checked. Refer to

HAC-256, "DTC Index"

DATA MONITOR

Input/output signal of A/C amp. can be checked.
NOTE:
The following table includes information (items) inapplicable to this vehicle. For information (items) applicable
to this vehicle, refer to CONSULT display items.

Display item list

ECU

Diagnostic item

(CONSULT)

A/C amp.

HVAC

Self Diagnostic Result

Data Monitor

Active Test

Work support

BCM

BCM-AIR CONDITIONER

Self Diagnostic Result

Data Monitor

ECM

ENGINE

Self Diagnostic Result

Data Monitor

Diagnostic mode

Description

Ecu Identification

Displays the part number of A/C amp.

Self Diagnostic Result

Displays the diagnosis results judged by A/C amp.

Data Monitor

Displays the input/output signal of A/C amp.

Active Test

The signals used to activate each device are forcibly supplied from A/C amp.

Work support

Changes the setting for each setting function and performs automatic adjustment of
components.

Monitor item [Unit]

Description

AMB TEMP SEN

[

C (

F)]

Ambient temperature value converted from ambient temperature signal received from
combination meter via CAN communication.

INT TEMP SEN

[

C (

F)]

NOTE:
This item is indicated, but not monitored.

AMB SEN CAL

[

C (

F)]

Ambient temperature value calculated by A/C amp.

INT TEMP CAL

[

C (

F)]

NOTE:
This item is indicated, but not monitored.

COMP REQ SIG

[On/Off]

NOTE:
This item is indicated, but not monitored.

DIAGNOSIS SYSTEM (A/C AMP.)

HAC-251

< SYSTEM DESCRIPTION >

[MANUAL HEATER ]

HAC

ACTIVE TEST

The signals used to activate each device forcibly supplied from A/C amp. operation check of air conditioning
system can be performed.

Check each output device

NOTE:
Perform the inspection of each output device after starting the engine because the compressor is operated.

WORK SUPPORT

Setting change of each setting functions and automatic adjustment of components can be performed.

COMP ECV DUTY

[%]

NOTE:
This item is indicated, but not monitored.

FAN REQ SIG

[On/Off]

Displays blower fan ON signal ON/OFF status transmitted to ECM.

FAN DUTY

Target duty ratio of voltage (applied voltage) applied to blower motor by A/C amp.

VEHICLE SPEED

[km/h

(mph)]

Vehicle speed signal value received from combination meter via CAN communication.

Monitor item [Unit]

Description

Test item

Description

HVAC TEST

The operation check of air conditioning system can be performed by selecting the mode.
Refer to the following table for the conditions of each mode.

Test item

MODE 1

MODE 2

MODE 3

MODE 4

MODE 5

MODE 6

MODE 7

Mode door motor position

VENT

B/L

FOOT

D/F

DEF

Intake door motor position

REC

20% FRE

FRE

Air mix door motor position

FULL COLD

FULL HOT

Blower motor (duty ratio)

35%

60%

90%

35%

Work item

Description

Refer to

Door Motor Starting Position Reset

Starting position reset of air mix door motor and mode door
motor can be performed.

HAC-272, "Work Procedure"

HAC-252

< SYSTEM DESCRIPTION >

[MANUAL HEATER ]

DIAGNOSIS SYSTEM (BCM)

DIAGNOSIS SYSTEM (BCM)

COMMON ITEM

COMMON ITEM : CONSULT Function (BCM - COMMON ITEM)

INFOID:0000000010916205

APPLICATION ITEM

CONSULT performs the following functions via CAN communication with BCM.

SYSTEM APPLICATION

BCM can perform the following functions for each system.
NOTE:
It can perform the diagnosis modes except the following for all sub system selection items.

: Applicable item

FREEZE FRAME DATA (FFD)

The BCM records the following vehicle condition at the time a particular DTC is detected, and displays on
CONSULT.

Diagnosis mode

Function Description

Work Support

Changes the setting for each system function.

Self Diagnostic Result

Displays the diagnosis results judged by BCM.

CAN Diag Support Monitor

Monitors the reception status of CAN communication viewed from BCM.

Data Monitor

The BCM input/output signals are displayed.

Active Test

The signals used to activate each device are forcibly supplied from BCM.

Ecu Identification

The BCM part number is displayed.

Configuration

• Read and save the vehicle specification.
• Write the vehicle specification when replacing BCM.

System

Sub system selection item

Diagnosis mode

Work Support

Data Monitor

Active Test

Door lock

DOOR LOCK

Rear window defogger

REAR DEFOGGER

Warning chime

BUZZER

Exterior lamp

HEAD LAMP

Interior room lamp control

INT LAMP

Wiper and washer

WIPER

Turn signal and hazard warning lamps

FLASHER

PTC heater control

AIR CONDITONER

Intelligent Key system

INTELLIGENT KEY

Combination switch

COMB SW

Body control system

BCM

NVIS - NATS

IMMU

Interior room lamp battery saver

BATTERY SAVER

Back door open

TRUNK

Vehicle security

THEFT ALM

RAP

RETAINED PWR

Remote keyless entry system

MULTI REMOTE ENT

Signal buffer system

SIGNAL BUFFER

DIAGNOSIS SYSTEM (BCM)

HAC-253

< SYSTEM DESCRIPTION >

[MANUAL HEATER ]

HAC

AIR CONDITIONER

AIR CONDITIONER : CONSULT Function (BCM - AIR CONDITIONER)

INFOID:0000000010502890

ACTIVE TEST

CONSULT screen item

Indication/Unit

Description

BATTERY VOLTAGE

Battery voltage of the moment a particular DTC is detected.

VEHICLE SPEED

km/h

Vehicle speed of the moment a particular DTC is detected.

EXTERNAL TEMP

External temperature of the moment a particular DTC is detected

VEHICLE COND

—

NOTE:
This item is displayed, but cannot be use this item.

DOOR LOCK STATUS

—

NOTE:
This item is displayed, but cannot be use this item.

POWER SUPPLY
COUNTER

min

Displays the cumulative time from the time that the battery terminal is connected.

Test item

Operation

Description

PTC RELAY-1

Off/On

PTC RELAY-1 is turned OFF/ON.

PTC RELAY-2

Off/On

PTC RELAY-2 is turned OFF/ON.

PTC RELAY-3

Off/On

PTC RELAY-3 is turned OFF/ON.

HAC-254

< ECU DIAGNOSIS INFORMATION >

[MANUAL HEATER ]

A/C AMP.

ECU DIAGNOSIS INFORMATION

A/C AMP.

Reference Value

INFOID:0000000010433420

CONSULT DATA MONITOR REFERENCE VALUES

NOTE:
The following table includes information (items) inapplicable to this vehicle. For information (items) applicable
to this vehicle, refer to CONSULT display items.

TERMINAL LAYOUT

PHYSICAL VALUES

Monitor item

Condition

Value/Status

AMB TEMP SEN

Ignition switch ON

Equivalent to ambient tem-
perature

INT TEMP SEN

NOTE:
This item is indicated, but not monitored.

AMB SEN CAL

Ignition switch ON

Equivalent to ambient tem-
perature

INT TEMP CAL

NOTE:
This item is indicated, but not monitored.

COMP REQ SIG

NOTE:
This item is indicated, but not monitored.

Off

COMP ECV DUTY

NOTE:
This item is indicated, but not monitored.

FAN REQ SIG

Engine: Run at idle after
warming up

Blower motor: ON

Blower motor: OFF

Off

FAN DUTY

Engine: Run at idle after
warming up

Blower motor: ON

1 – 100

Blower motor: OFF

VEHICLE SPEED

Turn drive wheels and compare CONSULT value with the
speedometer indication.

Equivalent to speedometer
reading

JMIIA3431ZZ

Terminal No.

(Wire color)

Description

Condition

Value

−

Signal name

Input/

Output

(G)

Ground

Fan control amp. control

Output

Ignition
switch ON

Blower mo-
tor: 1st - 23rd
speed (man-
ual)

2.5 – 3.5 V

Blower mo-
tor: 24th
speed (man-
ual)

10 – 11 V

A/C AMP.

HAC-255

< ECU DIAGNOSIS INFORMATION >

[MANUAL HEATER ]

HAC

(SB)

Ground

Accessory power supply

Input

Ignition switch ON

11 – 14 V

(V)

Ground

Ignition power supply

Input

Ignition switch ON

11 – 14 V

(L)

—

CAN-H

Input/

Output

—

(W)

Ground

Door motor power supply (mode,
intake)

Output

• Ignition switch ON
• Each following condition
- Immediately after the IN-

TAKE switch is operated
(when intake door motor
operates)

- Immediately after each

MODE switch is operated
(when mode door motor
operates)

11 – 14 V

(BG)

Ground

Air mix door motor drive 1

Output

• Ignition switch ON
• Immediately after the tem-

perature control dial is op-
erated (when the air mix
door motor operates)

(Y)

Ground

Air mix door motor drive 2

(V)

Ground

Intake door motor drive 1

Output

• Ignition switch ON
• Immediately after the IN-

TAKE switch is operated
(when intake door motor
operates)

(GR)

Ground

Intake door motor drive 2

(LG)

Ground

Mode door motor drive 1

Output

• Ignition switch ON
• Immediately after the each

MODE switch is operated
(when mode door motor
operates)

(SB)

Ground

Mode door motor drive 2

(W)

Ground

Blower motor feedback

Output

Ignition
switch ON

Blower mo-
tor: 1st
speed (man-
ual)

9.0 – 10.5 V

(B)

Ground

—

Ignition switch ON

0 – 0.1 V

(R)

—

CAN-L

Input/

Output

—

(SB)

Ground

Door motor power supply (air
mix)

Output

• Ignition switch ON
• Following condition
- Immediately after the tem-

perature control dial is op-
erated

11 – 14 V

Terminal No.

(Wire color)

Description

Condition

Value

−

Signal name

Input/

Output

JPIIA1647GB

HAC-256

< ECU DIAGNOSIS INFORMATION >

[MANUAL HEATER ]

A/C AMP.

DTC Index

INFOID:0000000010433422

(GR)

Ground

Air mix door motor drive 3

Output

• Ignition switch ON
• Immediately after the tem-

perature control dial is op-
erated (when the air mix
door motor operates)

(P)

Ground

Air mix door motor drive 4

(LG)

Ground

Intake door motor drive 3

Output

• Ignition switch ON
• Immediately after the IN-

TAKE switch is operated
(when intake door motor
operates)

(R)

Ground

Intake door motor drive 4

(L)

Ground

Mode door motor drive 3

Output

• Ignition switch ON
• Immediately after the each

MODE switch is operated
(when mode door motor
operates)

(G)

Ground

Mode door motor drive 4

Terminal No.

(Wire color)

Description

Condition

Value

−

Signal name

Input/

Output

JPIIA1647GB

DTC

Items

(CONSULT screen terms)

Reference

U1000

CAN COMM CIRCUIT

HAC-273, "DTC Logic"

U1010

CONTROL UNIT (CAN)

HAC-274, "DTC Logic"

B24B7

INTAKE DOOR MOTOR

[CIRCUIT SHORT TO BATTERY]

HAC-275, "DTC Logic"

[CIRC SHORT TO GRND OR OPEN]

B24B9

MODE DOOR MOTOR

[CIRCUIT SHORT TO BATTERY]

HAC-278, "DTC Logic"

[CIRC SHORT TO GRND OR OPEN]

B24BB

LEFT AIR MIX DOOR MOTOR

[CIRCUIT SHORT TO BATTERY]

HAC-281, "Diagnosis Pro-

cedure"

[CIRC SHORT TO GRND OR OPEN]

Qashqai J11. Heater & Air conditioning Control System - part 16