Infiniti I30 (A33). Manual — part 522

Operational Check

NHHA0178

The purpose of the operational check is to confirm that the system
operates properly.

CONDITIONS:

NHHA0178S01

I

Engine running and at normal operating temperature.

RHA942H

PROCEDURE:

NHHA0178S02

1. Check Memory Function

NHHA0178S0201

1.

Set the temperature 90°F or 32°C.

2.

Press OFF switch.

3.

Turn the ignition off.

4.

Turn the ignition on.

5.

Press the AUTO switch.

6.

Confirm that the set temperature remains at previous tempera-
ture.

7.

Press OFF switch.

If NG, go to trouble diagnosis procedure for memory function (HA-
92).
If OK, continue with next check.

RHA361H

2. Check Blower

NHHA0178S0202

1.

Press fan switch (up side) one time.
Blower should operate on low speed.
The fan symbol should have one blade lit

.

2.

Press fan switch (up side) one more time, and continue check-
ing blower speed and fan symbol until all speeds are checked.

3.

Leave blower on MAX speed

.

If NG, go to trouble diagnosis procedure for blower motor (HA-66).
If OK, continue with next check.

RHA362H

3. Check Discharge Air

NHHA0178S0203

1.

Press mode switch four times and DEF button.

2.

Each position indicator should change shape.

GI

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TROUBLE DIAGNOSES

Operational Check

HA-47

RHA654F

3.

Confirm that discharge air comes out according to the air dis-
tribution table at left.
Refer to “Discharge Air Flow” (HA-26).

NOTE:
Confirm that the compressor clutch is engaged (visual inspection)
and intake door position is at FRESH when the DEF

is

selected.
Intake door position is checked in the next step.
If NG, go to trouble diagnosis procedure for mode door motor
(HA-53).
If OK, continue with next check.

RHA943H

4. Check Recirculation

NHHA0178S0204

1.

Press REC

switch.

Recirculation indicator should illuminate.

2.

Listen for intake door position change (you should hear blower
sound change slightly).

If NG, go to trouble diagnosis procedure for intake door (HA-63).
If OK, continue with next check.

RHA944H

5. Check Temperature Decrease

NHHA0178S0205

1.

Turn the temperature dial counterclockwise until 18°C (60°F)
is displayed.

2.

Check for cold air at discharge air outlets.

If NG, go to trouble diagnosis procedure for insufficient cooling
(HA-81).
If OK, continue with next check.

RHA945H

6. Check Temperature Increase

NHHA0178S0206

1.

Turn the temperature dial clockwise until 32°C (90°F) is dis-
played.

2.

Check for hot air at discharge air outlets.

If NG, go to trouble diagnosis procedure for insufficient heating
(HA-89).
If OK, continue with next check.

TROUBLE DIAGNOSES

Operational Check (Cont’d)

HA-48

RHA946H

7. Check ECON (Economy) Mode

NHHA0178S0207

1.

Set the temperature 75°F or 25°C.

2.

Press ECON switch.

3.

Display should indicate ECON (no AUTO).
Confirm that the compressor clutch is not engaged (visual
inspection).
(Discharge air and blower speed will depend on ambient, in-
vehicle and set temperatures.)

If NG, go to trouble diagnosis procedure for ECON (Economy)
mode (HA-93).
If OK, continue with next check.

RHA947H

8. Check AUTO Mode

NHHA0178S0208

1.

Press AUTO switch.

2.

Display should indicate AUTO (no ECON).
Confirm that the compressor clutch engages (audio or visual
inspection).
(Discharge air and blower speed will depend on ambient, in-
vehicle and set temperatures.)

If NG, go to trouble diagnosis procedure for A/C system (HA-50),
then if necessary, trouble diagnosis procedure for magnet clutch
(HA-75).
If OK, continue with next check.

RHA396H

9. Check Ambient Display

NHHA0178S0209

1.

Press AMB switch.

2.

Display should show the outside (ambient) temperature for
approximately 5 seconds.

If all operational check are OK (symptom can not be duplicated),
go to “Incident Simulation Tests” (GI-25) and perform tests as out-
lined to simulate driving conditions environment. If symptom
appears, refer to “Symptom Table” (HA-46) and perform applicable
trouble diagnosis procedures.

GI

MA

EM

LC

EC

FE

AT

AX

SU

BR

ST

RS

BT

SC

EL

IDX

TROUBLE DIAGNOSES

Operational Check (Cont’d)

HA-49

A/C System

TROUBLE DIAGNOSIS PROCEDURE FOR A/C SYSTEM

=NHHA0179

SYMPTOM:

I

A/C system does not come on.

INSPECTION FLOW

RHA948H

*1: HA-51

*2: HA-47

*3: HA-51

RHA940H

COMPONENT DESCRIPTION

NHHA0247

Automatic Amplifier (Auto Amp.)

NHHA0247S01

The auto amplifier 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 auto amplifier is unitized with control mechanisms. Signals
from various switches and Potentio Temperature Control (PTC) are
directly entered into auto amplifier.
Self-diagnostic functions are also built into auto amplifier to provide
quick check of malfunctions in the auto air conditioner system.

RHA940H

Potentio Temperature Control (PTC)

NHHA0247S02

The PTC is built into the A/C auto amp. It can be set at an interval
of 0.5°C (1.0°F) in the 18°C (65°F) to 32°C (85°F) temperature
range by pushing the temperature button. The set temperature is
digitally displayed.

TROUBLE DIAGNOSES

A/C System

HA-50