Infiniti QX4 (R50). Manual — part 465

8

CHECK ACTUATORS

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

MTBL0200

MTBL0044

OK or NG

OK

©

GO TO 9.

NG

©

I

Air outlet does not change.
Go to “Mode Door Motor” (HA-75).

I

Intake door does not change.
Go to “Intake Door Motor” (HA-87).

I

Blower motor operation is malfunctioning.
Go to “Blower Motor” (HA-95).

I

Magnet clutch does not engage.
Go to “Magnet Clutch” (HA-104).

I

Discharge air temperature does not change.
Go to “Air Mix Door Motor” (HA-82).

TROUBLE DIAGNOSES

Self-diagnosis (Cont’d)

HA-58

9

STEP 5 - TEMPERATURE OF EACH SENSOR IS CHECKED

Turn temperature dial clcokwise.
Code No.

appears on the display.

RHA492A

©

GO TO 10.

10

CHECK AMBIENT SENSOR

Press

(DEF) switch one time, temperature detected by ambient sensor is indicated on the display.

ECON shown in display indicates negative temperature reading.
NOTE:
If temperature shown on display greatly differs from actual temperature, check sensor circuit first, then inspect sensor.

RHA861H

OK or NG

OK

©

GO TO 11.

NG

©

Go to Ambient Sensor Circuit (HA-129).

GI

MA

EM

LC

EC

FE

AT

TF

PD

AX

SU

BR

ST

RS

BT

SC

EL

IDX

TROUBLE DIAGNOSES

Self-diagnosis (Cont’d)

HA-59

11

CHECK IN-VEHICLE SENSOR

Press

(DEF) switch the second time, temperature detected by in-vehicle sensor is indicated on the display screen.

ECON shown in display indicates negative temperature reading.
NOTE:
If temperature shown on display greatly differs from actual temperature, check sensor circuit first, then inspect sensor.

RHA862H

OK or NG

OK

©

GO TO 12.

NG

©

Go to In-vehicle Sensor Circuit (HA-132).

12

CHECK INTAKE SENSOR

Press

(DEF) switch the third time, temperature detected by intake sensor is indicated on the display.

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

RHA862HA

OK or NG

OK

©

GO TO 13.

NG

©

Go to Intake Sensor Circuit (HA-139).

TROUBLE DIAGNOSES

Self-diagnosis (Cont’d)

HA-60

13

DETECTS MULTIPLEX COMMUNICATION ERROR

Press REC switch.
Does code No.

appears on the display

MTBL0509

Yes or No

Yes

©

INSPECTION END

No

©

1. Go to “Multiplex Communication Circuit”, HA-142.
2. Go to “OPERATIONAL CHECK”, HA-66.

Confirm that A/C system is in good order.

GI

MA

EM

LC

EC

FE

AT

TF

PD

AX

SU

BR

ST

RS

BT

SC

EL

IDX

TROUBLE DIAGNOSES

Self-diagnosis (Cont’d)

HA-61