Nissan Tiida C11. Manual - part 903

HAC-276

< COMPONENT DIAGNOSIS >

[AUTO AIR CONDITIONER (W/NAVI)]

PTC HEATER CONTROL SYSTEM

If NG, replace ambient sensor. Refer to XX.

POWER SUPPLY AND GROUND CIRCUIT FOR CONTROLLER

HAC-277

< COMPONENT DIAGNOSIS >

[AUTO AIR CONDITIONER (W/NAVI)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

POWER SUPPLY AND GROUND CIRCUIT FOR CONTROLLER

Component Description

INFOID:0000000001547368

COMPONENT DESCRIPTION

Front air control 

The front air control has a built-in microcomputer which processes information sent from various sensors
needed for air conditioner operation. The air mix door motor, mode door motor, intake door motor, blower
motor and compressor are then controlled.
The front air control is unitized with control mechanisms. Signal from various switches and Potentio Tempera-
ture Control (PTC) are directly entered into front air control 
Self-diagnostic functions are also built into front air control to provide quick check of malfunctions in the auto
air conditioner system.

Potentio Temperature Control (PTC)

The PTC is built into the front air control It can be set at an interval of
1

°

C (34

°

F) in the 18

°

C (64

°

F) to 32

°

C (90

°

F) temperature range by

turning temperature control switch. The set temperature is displayed.

A/C Auto Amp. Component Function Check

INFOID:0000000001547369

SYMPTOM: A/C system does not come on.

INSPECTION FLOW

1.

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - AUTO MODE

1.

Rotate the mode dial to the AUTO position.

2.

Display should indicate AUTO. Confirm that the compressor clutch engages (sound or visual inspection).
(Discharge air and blower speed will depend on ambient, in-vehicle and set temperatures.) 

Can a symptom be duplicated?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

PERFORM COMPLETE OPERATIONAL CHECK

Perform a complete operational check and check for any symptoms. Refer to 

HAC-202, "Operational Check"

.

Can a symptom be duplicated?

YES

>> Refer to 

HAC-201, "How to Perform Trouble Diagnosis For Quick And Accurate Repair"

.

NO

>> System OK.

3.

CHECK FOR SERVICE BULLETINS

Check for any service bulletins.

>> GO TO 4.

4.

CHECK POWER AND GROUND CIRCUIT

Check main power supply and ground circuit. Refer to 

HAC-278, "A/C Auto Amp Power and Ground Diagnosis

Procedure"

.

Is the inspection result normal?

YES

>> System OK.

NO

>> Replace Front air control. Refer to XXXX. 

SJIA0876E

HAC-278

< COMPONENT DIAGNOSIS >

[AUTO AIR CONDITIONER (W/NAVI)]

POWER SUPPLY AND GROUND CIRCUIT FOR CONTROLLER

A/C Auto Amp Power and Ground Diagnosis Procedure

INFOID:0000000001547370

DIAGNOSTIC PROCEDURE FOR A/C SYSTEM

SYMPTOM: A/C system does not come on.

1.

CHECK POWER SUPPLY CIRCUIT FOR FRONT AIR CONTROL.

1.

Turn ignition switch OFF.

2.

Disconnect front air control connector.

3.

Check voltage between front air control harness connector and
ground.

OK or NG

OK

>> GO TO 2.

NG

>>

Check 10A fuses Nos. 2, 13 and 16, located in the fuse block (J/B).

• If fuses are OK, check harness for open circuit. Repair or replace if necessary.
• If fuses are NG, replace fuse and check harness for short circuit. Repair or replace if necessary.

2.

CHECK GROUND CIRCUIT FOR FRONT AIR CONTROL

1.

Turn ignition switch OFF.

2.

Check continuity between front air control harness connector
and ground.

OK or NG

OK

>> Replace front air control Refer to XX.

NG

>> Repair or replace harness.

SJIA0877E

Terminals

Ignition switch position

(+)

(-)

OFF

ACC

ON

Connector

Terminal

Ground

front air control: 

M85

19

Battery 
voltage

Battery 
voltage

Battery 
voltage

11

Approx. 

0V

Approx. 

0V

Battery 
voltage

18

Approx. 

0V

Approx. 

0V

Battery 
voltage

SJIA0878E

Connector

Terminal

Ground

Continuity

front air control: 

M85

20

Yes

SJIA0879E

AIR CONDITIONER CONTROL

HAC-279

< ECU DIAGNOSIS >

[AUTO AIR CONDITIONER (W/NAVI)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

ECU DIAGNOSIS

AIR CONDITIONER CONTROL

Front Air Control Terminals Reference Values

INFOID:0000000001547371

Measure voltage between each terminal and ground by following ter-
minals and reference value for front air control

A/C FRONT AIR CONTROL HARNESS CONNECTOR TERMINAL LAYOUT

TERMINALS AND REFERENCE VALUE FOR FRONT AIR CONTROL

SJIA0739E

AWIIA0564ZZ

Terminal 

No.

Wire 

color

Item

Ignition 

switch

Condition

Voltage

(V)

1

R

• Gas sensor
• Power supply for intake 

door PBR (5V output)

ON

-

Approx. 5

2

R

Rear window defogger feed-
back signal

ON

Rear window defogger: ON

Approx. 12

3

SB

Ambient sensor

-

-

-

4

LG

In-vehicle sensor

-

-

-

5

P

Sunload sensor

-

-

-

6

O

Intake sensor

-

-

-

9

B

Illumination Ground

ON

-

Approx. 0

10

BR

Sensor ground

ON

-

Approx. 0

11

R

Power supply for IGN 2

ON

-

Battery voltage

12

BR

Engine coolant temperature 
sensor signal

ON

At idle (after warming up, ap-
prox. 80

°

C)

CAUTION:

The waveforms vary depend-
ing on coolant temperature.

14

SB

Intake door motor feedback 
signal

ON

REC position

Approx. 5

FRE position

Approx. 0

SKIB3651J