Nissan Altima L32. Manual - part 835

HAC-114

< FUNCTION DIAGNOSIS >

[MANUAL AIR CONDITIONER]

DIAGNOSIS SYSTEM (ECM)

DIAGNOSIS SYSTEM (ECM)

CONSULT-III Function

INFOID:0000000004498266

CONSULT-III APPLICATION ITEMS

CONSULT-III can display each diagnosis item using the diagnosis test modes shown following.

DATA MONITOR

Display Item List

System part

Check item, diagnosis mode

Description

ECM

Data monitor

Displays ECM input data in real time.

Monitor item name

“operation or unit”

Contents

IGN ON SW

“ON/OFF” Displays “IGN position (ON)/OFF, ACC position (OFF)” status as judged from ignition switch signal.

FAN ON SIG

“ON/OFF” Displays “FAN (ON)/FAN (OFF)” status as judged from blower fan motor switch signal.

AIR COND SW 

“ON/OFF”

Displays “COMP (ON)/COMP (OFF)” status as judged from air conditioner switch signal.

REFRIGERANT 
PRESSURE SEN-
SOR 

“V”

Displays “Refrigerant pressure sensor for voltage” status as inputted from refrigerant pressure sen-
sor.

LAN SYSTEM CIRCUIT

HAC-115

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

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COMPONENT DIAGNOSIS

LAN SYSTEM CIRCUIT

Description

INFOID:0000000004498267

SYMPTOM: Mode door motor, intake door motor and/or air mix door motor does not operate normally.

Diagnosis Procedure

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DIAGNOSIS PROCEDURE FOR LAN CIRCUIT

1.

CHECK POWER SUPPLY FOR DOOR MOTORS

1. Press ignition switch ON.

2. Check voltage between front air control connector M37 terminal

20 and ground.

Is the inspection result normal?

YES

>> GO TO 2

NO

>> Replace front air control. Refer to 

VTL-8, "Removal and

Installation"

.

2.

CHECK SIGNAL FOR DOOR MOTORS

Check voltage between front air control connector M37 terminal 3

and ground.

Is the inspection result normal?

YES

>> GO TO 3

NO

>> Replace front air control. Refer to 

VTL-8, "Removal and

Installation"

.

3.

CHECK POWER SUPPLY FOR MOTOR

WJIA0883E

Terminal

Voltage (V)

(Approx.)

(+)

(-)

Connector - Terminal

M37-20

Body ground

12V

AWIIA0017ZZ

Terminal

Voltage (V)

(Approx.)

(+)

(-)

Connector - Terminal

M37-3

Ground

5.5V

AWIIA0018ZZ

HAC-116

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

LAN SYSTEM CIRCUIT

Check voltage between mode door motor connector M127 terminal 3

and ground, between air mix door motor connector M130 terminal 3

and ground, and between intake door motor connector M126 termi-

nal 3 and ground.

Is the inspection result normal?

YES

>> GO TO 4

NO

>> Replace harness or connector.

4.

CHECK SIGNAL FOR MOTOR

Check voltage between mode door motor connector M127 terminal 1

and ground, between air mix door motor connector M130 terminal 1

and ground, and between intake door motor connector M126 termi-

nal 1 and ground.

Is the inspection result normal?

YES

>> GO TO 5

NO

>> Replace harness or connector.

5.

CHECK MOTOR GROUND CIRCUIT

1. Press ignition switch OFF.

2. Disconnect door motor connectors.

3. Check continuity between mode door motor connector M127 ter-

minal 2 and ground, between air mix door motor connector

M130 terminal 2 and ground, and between intake door motor

connector M126 terminal 2 and ground.

Is the inspection result normal?

YES

>> GO TO 6

NO

>> Replace harness or connector.

6.

CHECK MOTOR OPERATION

Disconnect and reconnect the motor connectors and confirm the motor operation.

Door motors

Terminals

Voltage (V)

(Approx.)

(+)

(-)

Connector - Ter-

minal

Mode

M127-3

Body ground

12V

Air mix

M130-3

Intake

M126-3

AWIIA0019ZZ

Door motors

Terminals

Voltage (V)

(Approx.)

(+)

(-)

Connector - Terminal

Mode M127-1

Body ground

5.5V

Air mix

M130-1

Intake M126-1

AWIIA0020ZZ

Door motors

Terminals

Continuity

(+)

(-)

Connector - Terminal

Mode M127-2

Body ground

Yes

Air mix 

M130-2

Intake

M126-2

WJIA0884E

LAN SYSTEM CIRCUIT

HAC-117

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

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Is the inspection result normal?

YES

>>  (Returns to normal operation.)

• Motor connector contacts dirty or damaged

NO

>> (Does not operate normally.)

• GO TO 7

7.

CHECK MODE DOOR MOTOR AND AIR MIX DOOR MOTOR OPERATION

1. Disconnect the intake door motor connector.

2. Reconnect the mode door motor connector and air mix door motor connector, confirm the mode door

motor and air mix door motor operation.

Is the inspection result normal?

YES

>>  (Mode door motor and air mix door motor operate normally.)

• Replace the intake door motor. Refer to 

VTL-17, "Removal and Installation"

.

NO

>> (Mode door motor and air mix door motor do not operate normally.)

• GO TO 8

8.

CHECK AIR MIX DOOR MOTOR AND INTAKE DOOR MOTOR OPERATION

1. Disconnect mode door motor connector.

2. Reconnect the intake door motor connector, confirm the air mix door motor and intake door motor opera-

tion.

Is the inspection result normal?

YES

>>  (Air mix door motor and intake door motor operate normally.)

• Replace mode door motor. Refer to 

VTL-18, "Removal and Installation"

.

NO

>> (Air mix door motor and intake door motor do not operate normally.)

• GO TO 9

9.

CHECK INTAKE DOOR MOTOR AND MODE DOOR MOTOR OPERATION

1. Disconnect air mix door motor connector.

2. Reconnect mode door motor connector, confirm the intake door motor and mode door motor operation.
Is the inspection result normal?

YES

>>  (Intake door motor and mode door motor operate normally.)

• Replace inoperative air mix door motor. Refer to 

VTL-19, "Removal and Installation"

.

NO

>> (Intake door motor and mode door motor do not operate normally.)

• Replace front air control. Refer to 

VTL-8, "Removal and Installation"

.