Infiniti Q45 (FY33). Manual - part 472

CHECK MALFUNCTIONING DOOR MOTOR POSITION SWITCH

Mode or (and) intake door motor position switch(es) is (are) malfunctioning.
(If two or more mode or intake doors are out of order, corresponding code numbers blink respectively two times.)

MTBL0535

*1: If mode door motor harness connector is disconnected, the following display pattern will appear.

Return to

*2: If intake door motor harness connector is disconnected, the following display pattern will appear.

Return to

*3: HA-101
*4: HA-111

RHA168DA

RHA498A

INSPECTION END

IDX

TROUBLE DIAGNOSES

Self-diagnosis (Cont’d)

HA-53

AUXILIARY MECHANISM: TEMPERATURE SETTING TRIMMER

The trimmer compensates for differences in range of ±3°C (±6°F) between temperature setting (displayed
digitally) and temperature felt by driver.
Operating procedures for this trimmer are as follows:

Begin Self-diagnosis STEP 5 mode.

Press

(fan) UP switch to set system in auxiliary mode.

Display shows “

” in auxiliary mechanism.

It takes approximately 3 seconds.

Turn the temperature dial clockwise or counterclockwise: Temperature will change at a rate of 0.5°C (1°F).

RHA863H

When battery cable is disconnected, trimmer operation is canceled. Temperature set becomes that of
initial condition, i.e. 0°C (0°F).

TROUBLE DIAGNOSES

Self-diagnosis (Cont’d)

HA-54

Preliminary Check

PRELIMINARY CHECK 1

Air outlet does not change.

CHECK SENSOR CIRCUIT.
Set up Self-diagnosis STEP 2.
Is each sensor circuit normal?
Code No. 20 should be indicated on the dis-
play after approx. 3 seconds.

Yes

CHECK SENSOR CIRCUIT IN DETAIL ACCORDING TO THE DIAG-
NOSTIC PROCEDURE BELOW CORRESPONDING TO EACH CODE
NO.

Are sensor circuits for ambient sensor, in-vehicle sensor, and intake
sensor operating normally? If malfunction is suspected, check tem-
perature detected by each sensor using Self-diagnosis STEP 5. Con-
firm the temperature is within normal range before performing Diag-
nostic Procedures.

CHECK MODE DOOR MOTOR.
Set up Self-diagnosis STEP 3.
Is mode door motor operating normally?
Code No. 30 should be indicated on the dis-
play after approx. 3 seconds.

Yes

Go to Mode Door Motor Circuit. (HA-100)

CHECK MODE DOOR OPERATION.
Set up Self-diagnosis STEP 4.
Does air outlet change according to each code
No.?

Refer to Discharge Air Flow. (HA-27)

Yes

CHECK SIDE LINK MECHANISM.
Refer to Control Linkage Adjustment.
(HA-123)

Repair or adjust.

Go to Mode Door Motor Circuit. (HA-100)

Air outlet control system is normal.

Code No.

How to repair

Reference

page

/−

Go to Ambient Sensor Circuit.

HA-90

/−

Go to In-vehicle Sensor Circuit.

HA-93

/−

Go to Intake Sensor Circuit.

HA-96

/−

Go to Sunload Sensor Circuit.

HA-97

/−

Go to Air Mix Door Motor Circuit.

HA-102

/−

Go to Bi-level Door Motor Circuit.

HA-104

VENT VENT B/L

B/L

FOOT F/D DEF

IDX

TROUBLE DIAGNOSES

HA-55

PRELIMINARY CHECK 2

Intake door does not change.

CHECK SENSOR CIRCUIT.
Set up Self-diagnosis STEP 2.
Is each sensor circuit normal?
Code No. 20 should be indicated on the dis-
play after approx. 3 seconds later.

Yes

CHECK SENSOR CIRCUIT IN DETAIL ACCORDING TO THE DIAG-
NOSTIC PROCEDURE BELOW CORRESPONDED TO EACH CODE
NO.

CHECK INTAKE DOOR MOTOR OPERATION.
Set up Self-diagnosis STEP 4.
Does intake air change according to each code
No.?

Yes

CHECK INTAKE DOOR ROD or LEVER
MECHANISM.
Refer to Control Linkage Adjustment.
(HA-124)

Repair or adjust.

Go to Intake Door Motor Circuit. (HA-
109)

Intake door control system is normal.

Code No.

How to repair

Reference

page