Infiniti QX4 (R50). Manual — part 482

Memory Function

TROUBLE DIAGNOSIS PROCEDURE FOR MEMORY FUNCTION

=NBHA0102

SYMPTOM:

I

Memory function does not operate.

Inspection Flow

NBHA0102S01

Without Navigation System

NBHA0102S0101

RHA885H

*1: HA-72

*2: HA-66

*3: HA-45

TROUBLE DIAGNOSES

Memory Function

HA-126

With Navigation System

NBHA0102S0102

RHA886H

*1: HA-72

*2: HA-66

*3: HA-45

GI

MA

EM

LC

EC

FE

AT

TF

PD

AX

SU

BR

ST

RS

BT

SC

EL

IDX

TROUBLE DIAGNOSES

Memory Function (Cont’d)

HA-127

ECON (ECONOMY) Mode

TROUBLE DIAGNOSIS PROCEDURE FOR ECON (ECONOMY) MODE

=NBHA0103

SYMPTOM:

I

ECON mode does not operate.

Inspection Flow

NBHA0103S01

Without Navigation System

NBHA0103S0101

SHA920EA

*1: HA-72

*2: HA-66

*3: HA-45

TROUBLE DIAGNOSES

ECON (ECONOMY) Mode

HA-128

With Navigation System

NBHA0103S0102

RHA887H

*1: HA-72

*2: HA-66

*3: HA-45

RHA050G

Ambient Sensor Circuit

COMPONENT DESCRIPTION

NBHA0039

The ambient sensor is attached in front of the driver’s side con-
denser. It detects ambient temperature and converts it into a resis-
tance value which is then input into the auto amplifier.

AMBIENT TEMPERATURE INPUT PROCESS

NBHA0040

The automatic amplifier includes a “processing circuit” for the ambi-
ent sensor input. However, when the temperature detected by the
ambient sensor increases quickly, the processing circuit retards the
auto amp. function. It only allows the auto amp. to recognize an
ambient temperature increase of 0.33°C (0.6°F) per 100 seconds.
As an example, consider stopping for a cup of coffee after high
speed driving. Although the actual ambient temperature has not
changed, the temperature detected by the ambient sensor will
increase. This is because the heat from the engine compartment
can radiate to the front grille area, location of the ambient sensor.

GI

MA

EM

LC

EC

FE

AT

TF

PD

AX

SU

BR

ST

RS

BT

SC

EL

IDX

TROUBLE DIAGNOSES

ECON (ECONOMY) Mode (Cont’d)

HA-129