Infiniti Q45 (FY33). Manual — part 470

STEP-BY-STEP PROCEDURE

1

SET IN SELF-DIAGNOSTIC MODE

1. Turn ignition switch ON.
2. Set in self-diagnostic mode as follows. Within 10 seconds after starting engine (ignition switch is turned “ON”.), press

switch for at least 5 seconds.

E

GO TO 2.

2

STEP 1 - ALL LEDs AND DISPLAY SCREEN ARE CHECKED

When switch’s LED and display are functioning properly in STEP-1, LED and display will come on.

RHA860H

OK or NG

OK

E

GO TO 3.

NG

E

Malfunctioning

switch, LED or fluorescent display tube.

Go to “Main Power Supply and Ground Circuit Check”, HA-86.

3

VERIFY ADVANCE TO SELF-DIAGNOSIS STEP 2

1. Turn temperature dial clockwise.
2. Does advance to self-diagnosis STEP 2?

Yes or No

Yes

E

GO TO 4.

No

E

Malfunctioning temperature dial.
Check Display & NAVI control unit.

4

VERIFY RETURN TO SELF-DIAGNOSIS STEP 1

1. Turn temperature dial counterclockwise.
2. Does return to self-diagnosis STEP 1?

Yes or No

Yes

E

GO TO 5.

No

E

Malfunctioning temperature dial.
Check Display & NAVI control unit.

GI

MA

EM

LC

EC

FE

AT

PD

FA

RA

BR

ST

RS

BT

EL

IDX

TROUBLE DIAGNOSES

Self-diagnosis (Cont’d)

HA-45

5

STEP 2 - SENSOR CIRCUITS ARE CHECKED FOR OPEN OR SHORT CIRCUIT

Turn temperature dial clockwise.
Does code No.

appear on the display?

RHA970DB

Yes or No

Yes

E

GO TO 6.

No

E

GO TO 14.

6

STEP 3 - MODE DOOR AND INTAKE DOOR POSITIONS ARE CHECKED

Turn temperature dial clockwise.
Does code No.

appear on the display?

RHA869DD

Yes or No

Yes

E

GO TO 7.

No

E

GO TO 15.

TROUBLE DIAGNOSES

Self-diagnosis (Cont’d)

HA-46

7

STEP 4 - OPERATION OF EACH ACTUATOR IS CHECKED

Turn temperature dial clockwise.
Engine running.
Press DEF switch, code No. of each actuator test is indicated on the display.

RHA495A

E

GO TO 8.

GI

MA

EM

LC

EC

FE

AT

PD

FA

RA

BR

ST

RS

BT

EL

IDX

TROUBLE DIAGNOSES

Self-diagnosis (Cont’d)

HA-47

8

CHECK ACTUATORS

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

MTBL0536

RHA167F

OK or NG

OK

E

GO TO 9.

NG

E I

Air outlet does not change.
Go to “Mode Door Motor” (HA-100).

I

Discharge air temperature does not change.
Go to “Air Mix Door Motor” (HA-102).

I

Intake door does not change.
Go to “Intake Door Motor” (HA-109).

I

Blower motor operation is malfunctioning.
Go to “Blower Motor” (HA-113).

I

Magnet clutch does not engage.
Go to “Magnet Clutch” (HA-118).

TROUBLE DIAGNOSES

Self-diagnosis (Cont’d)

HA-48