Infiniti Q45 (FY33). Manual — part 469

RHA495A

RHA167F

RHA639E

q

C

STEP 4 - OPERATION OF EACH ACTUA-
TOR IS CHECKED.
Engine running.
Press DEF switch, code No. of each actua-
tor test is indicated on the display.

Refer to the following chart and confirm
discharge air flow, air temperature, blower
motor voltage and compressor operation.
Checks must be made visually, by lis-
tening to any noise, or by touching air
outlets with your hand, etc. for
improper operation.

OK

E

NG

I

Air outlet does not
change.
Go to preliminary check 1
(HA-55).

I

Intake door does not
change.
Go to preliminary check 2
(HA-56).

I

Discharge air temperature
does not change.
Go to preliminary check 7
(HA-61).

I

Magnet clutch does not
engage.
Go to preliminary check 6
(HA-60).

I

Blower motor operation is
malfunctioning.
Go to preliminary check 5
(HA-59).

I

Bi-level door motor does
not operate normally.
Go to “DIAGNOSTIC
PROCEDURE”, “Bi-level
Door Motor Circuit”, HA-104.

I

Rear vent door motor
does not operate nor-
mally.
Go to “DIAGNOSTIC
PROCEDURE”, “Rear
Vent Door Motor Circuit”,
HA-122.

Turn temperature dial clockwise.

STEP 5 - TEMPERATURE OF EACH
SENSOR IS CHECKED.
Code No.

appears on the display.

q

D

(Go to next page.)

Code

No.

Actuator test pattern

Mode

door

Intake

door

Air

mix

door

Blower

motor

Com-

pres-

sor

Bi-

level
door

Rear

vent

door

VENT

REC

Full

Cold

5V

ON

Open

Open

VENT

REC

Full

Cold

5V

ON

Open

Closed

B/L

REC

Full

Cold

12V

ON

Open

Closed

B/L

20%
FRE

Full
Hot

7 - 9V

OFF

Closed

Closed

B/L

2

20%
FRE

Full
Hot

7 - 9V

OFF

Closed

Closed

FOOT

FRE

Full
Hot

7 - 9V

OFF

Closed

Closed

F/D

FRE

Full
Hot

7 - 9V

ON

Closed

Closed

DEF

FRE

Full
Hot

12V

ON

Closed

Closed

GI

MA

EM

LC

EC

FE

AT

PD

FA

RA

BR

ST

RS

BT

EL

IDX

TROUBLE DIAGNOSES

Self-diagnosis (Cont’d)

H

H

H

H

H

HA-41

RHA929F

RHA930F

RHA931F

RHA056D

q

D

Note

Press

(DEF) switch first time, tem-

perature detected by ambient sensor is
indicated on the display.

OK

E

NG

Go to Ambient Sensor Circuit
(HA-90).

Note

Press

(DEF) switch second time,

temperature detected by in-vehicle sensor
is indicated on the display.

OK

E

NG

Go to In-vehicle Sensor Cir-
cuit (HA-93).

Note

Press

(DEF) switch third time, tem-

perature detected by intake sensor is indi-
cated on the display.

OK

E

NG

Go to Intake Sensor Circuit
(HA-96).

Press

(REC) switch. Code No.

is indicated on the display.

Multiplex communication error between
control unit and auto amplifier is detected.
(If plural errors occur, the display of each
error will blink two times for 0.5 second
intervals.)

OK

E

NG

Disconnect battery for about
1 minute to cancel the com-
munication memory.
Reconnect battery. Set up
self-diagnosis STEP 5.
Check multiplex communica-
tion error.

OK

NG

Turn ignition switch OFF or AUTO switch
ON.

F

Go to Self-diagnosis
Circuit (HA-88).

END

Note:
If temperature shown on display greatly differs from actual temperature,
check sensor circuit first, then inspect sensor.

Display

Signal direction

In good order

blinks two
times

A/C control unit

,

auto ampli-
fier

blinks two
times

Auto amplifier

,

A/C control
unit

TROUBLE DIAGNOSES

Self-diagnosis (Cont’d)

H

H

H

H

H

H

H

H

HA-42

AUXILIARY MECHANISM: Temperature setting trimmer

This trimmer compensates for differences between temperature
setting (displayed digitally) and temperature felt by driver in a range
of ±3°C (±6°F).
Operating procedures for this trimmer are as follows:
Starting with STEP 5 under “Self-diagnostic mode”, press

(Blower) switch to set air conditioning system in auxiliary mode.

Then, set temperature dial to desired temperature. Temperature
will change at a rate of 0.5°C (1°F) each time a switch is turned.

SHA733E

When battery cable is disconnected, trimmer operation is can-
celed and temperature set becomes that of initial condition,
i.e. 0°C (0°F).

GI

MA

EM

LC

EC

FE

AT

PD

FA

RA

BR

ST

RS

BT

EL

IDX

TROUBLE DIAGNOSES

Self-diagnosis (Cont’d)

HA-43

INTRODUCTION AND GENERAL DESCRIPTION

The self-diagnostic system diagnoses sensors, door motors, blower motor, etc. by system line. Refer to appli-
cable sections (items) for details. Shifting from normal control to the self-diagnostic system is accomplished
by starting the engine (turning the ignition switch from “OFF” to “ON”) and pressing “

” switch for at least

5 seconds. The “

” switch must be pressed within 10 seconds after starting the engine (ignition switch is

turned “ON”). This system will be canceled by either pressing

(AUTO) switch or turning the ignition switch

“OFF”. Shifting from one step to another is accomplished by means of turning temperature dial, as required.
Additionally shifting from STEP 5 to AUXILIARY MECHANISM is accomplished by means of pushing

(fan)

UP switch.

SHA453F

TROUBLE DIAGNOSES

Self-diagnosis (Cont’d)

HA-44