Nissan Altima HL32 Hybrid. Manual - part 516

HEATER PUMP

HAC-85

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK VOLTAGE BETWEEN HEATER PUMP AND GROUND

1. Turn ignition switch ON (READY).

2. Press OFF switch. (A/C system does not operates.)

3. Perform “HVAC TEST” in “ACTIVE TEST” mode with CONSULT-III.

4. Select “MODE 1 - 7” in “HVAC TEST” active test item.

CAUTION:

Complete this inspection within 10 seconds if there is no water in the heater pump.

5. Check voltage between heater pump harness connector E83 terminal 1 and ground.

Is the inspection result normal?

YES

>> Replace heater pump. Refer to 

HA-40, "Removal and Installation"

.

NO

>> Check IPDM E/R. Refer to 

PCS-14, "Diagnosis Description"

.

4.

CHECK AUTO AMP. INPUT (HEATER PUMP ON) SIGNAL

Check heater pump ON/OFF signal in “DATA MONITOR”. Refer to 

HAC-134, "Reference Value"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace auto amp. Refer to 

VTL-8, "Removal and Installation"

.

5.

CHECK CAN COMMUNICATION

Check CAN communication. Refer to 

PCS-14, "Diagnosis Description"

.

• ECM – IPDM E/R
Is the inspection result normal?

YES

>> Replace ECM. Refer to 

EC-14, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT :

Special Repair Requirement"

.

NO

>> Repair or replace malfunctioning part(s).

IPDM E/R

Heater pump

Continuity

Connector

Terminal

Connector

Terminal

F10

48

E83

1

Continuity should exist

MODE 1 - 2

: Approx. 0 V

MODE 3 - 7

: Battery voltage

HEATER PUMP ON

: HTR WTR PUMP ON

HEATER PUMP OFF

: HTR WTR PUMP OFF

HAC-86

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

POWER SUPPLY AND GROUND CIRCUIT FOR AUTO AMP.

POWER SUPPLY AND GROUND CIRCUIT FOR AUTO AMP.

Description

INFOID:0000000004215378

COMPONENT DESCRIPTION

Auto Amp. (Automatic Amplifier)

The auto amp. (1) has a built-in microcomputer which processes

information sent from various sensors needed for air conditioner

operation. The air mix door motors, mode door motor, intake door

motor, blower motor and compressor are then controlled.

The auto amp. is unitized with control mechanisms. Signal from vari-

ous switches and potentio temperature control (PTC) are directly

entered into auto amp.

Power Supply and Ground Circuit for Auto Amp.

Potentio Temperature Control (PTC)

The PTC (1) is built into the auto amp. It can be set at an interval of

1

°C (2°F) in the 18°C (60°F) to 32°C (90°F) temperature range by

turning temperature control dial. The set temperature is displayed.

Component Function Check

INFOID:0000000004215379

1.

CONFIRM SYMPTOM BY PERFORMING THE FOLLOWING OPERATIONAL CHECK

1. Turn ignition switch ON (READY).

2. Press AUTO switch and A/C switch.

3. Each switch indicator will turn ON. Confirm that Discharge air and blower speed will depend on ambient,

in-vehicle and set temperatures.

Is the inspection result normal?

YES

>> END.

NO

>> Go to Diagnosis Procedure. Refer to 

HAC-86, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000004215380

1.

CHECK POWER SUPPLY CIRCUIT FOR AUTO AMP.

JSIIA0315ZZ

JPIIA0015GB

JPIIA0008GB

POWER SUPPLY AND GROUND CIRCUIT FOR AUTO AMP.

HAC-87

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

1. Disconnect auto amp. connector.

2. Check voltage between auto amp. harness connector M37 terminals 19, 39 and 40 and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK FUSE

Check 10A fuses [Nos. 3, 6 and 19, located in the fuse block (J/B)]. Refer to 

PG-64, "Terminal Arrangement"

.

Is the inspection result normal?

YES

>> Check harness for open circuit. Repair or replace if necessary.

NO

>> Check harness for short circuit and replace fuse.

3.

CHECK GROUND CIRCUIT FOR AUTO AMP.

1. Turn ignition switch OFF.

2. Check continuity between auto amp. harness connector M37 terminal 17, 37 and ground.

Is the inspection result normal?

YES

>> Replace auto amp. Refer to 

VTL-8, "Removal and Installation"

.

NO

>> Repair harness or connector.

(+)

(-)

Ignition switch position

Auto amp.

—

OFF

ACC

ON

Connector

Terminal

M37

39

Ground

Battery voltage

Battery voltage

Battery voltage

19

Approx. 0 V

Battery voltage

Battery voltage

39

Approx. 0 V

Approx. 0 V

Battery voltage

Auto amp.

—

Continuity

Connector

Terminal

M37

17

Ground

Continuity should exist

37

HAC-88

< COMPONENT DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

ELECTRIC COMPRESSOR

ELECTRIC COMPRESSOR

Description

INFOID:0000000004215381

COMPONENT DESCRIPTION

Electric Compressor

• The Air Conditioning (A/C) inverter is integrated with the compres-

sor.

• The electric motor is actuated by 3-phase alternating current sup-

plied by the A/C inverter. As a result, the air conditioning control

system is actuated without depending on the operation of the

engine, thus realizing a comfortable air conditioning system and

low fuel consumption.

• Due to the use of an electric compressor, the compressor speed

can be controlled at the required speed calculated by the auto

amp. Thus, the cooling and dehumidification performance and power consumption have been optimized.

• Low-moisture permeation hoses are used for the suction and discharge hoses at the compressor in order to

minimize the entry of moisture into the refrigeration cycle.

• For details on the electric compressor control effected by the auto amp.

• The electric compressor consists of a spirally wound fixed scroll and orbiting scroll that form a pair, a brush-

less motor, an oil separator, a motor shaft and A/C inverter.

• The fixed scroll is integrated with the housing. Because the rotation of the shaft causes the orbiting scroll to

revolve while maintaining the same posture, the volume of the space that is partitioned by both scrolls varies

to perform the suction, compression, and the discharge of the refrigerant gas.

• Locating the suction port directly above the scrolls enables direct suction, thus realizing improved suction

efficiency.

• Containing a built-in oil separator, this compressor is able to separate the compressor oil that is intermixed

with the refrigerant and circulates in the refrigeration cycle, thus realizing a reduction in the oil circulation

rate.

• This inverter converts the HV battery’s nominal voltage of DC 244.8 V into AC and supplies power to operate

the compressor.

1.

Discharge port

2.

Suction port

1.

Fixed scroll

2.

Orbiting scroll

3.

Brush-less motor

4.

Oil separator

5.

Motor shaft

6.

A/C inverter

JPIIA0053ZZ

JPIIA0054ZZ