Nissan Xterra. Instruction — part 454

HAC-14

< SYSTEM DESCRIPTION >

[MANUAL AIR CONDITIONER]

DIAGNOSIS SYSTEM (BCM)

DIAGNOSIS SYSTEM (BCM)

COMMON ITEM
COMMON ITEM : CONSULT Function (BCM - COMMON ITEM)

INFOID:0000000010244858

APPLICATION ITEM

CONSULT performs the following functions via CAN communication with BCM.

SYSTEM APPLICATION

BCM can perform the following functions.

AIR CONDITIONER

Direct Diagnostic Mode

Description

ECU Identification

The BCM part number is displayed.

Self Diagnostic Result

The BCM self diagnostic results are displayed.

Data Monitor

The BCM input/output data is displayed in real time.

Active Test

The BCM activates outputs to test components.

Work support

The settings for BCM functions can be changed.

Configuration

• The vehicle specification can be read and saved.
• The vehicle specification can be written when replacing BCM.

CAN Diag Support Mntr

The result of transmit/receive diagnosis of CAN communication is displayed.

System

Sub System

Direct Diagnostic Mode

E

C

U Ide

nt

ifi

ca

tio

n

Se

lf Di

ag

no

st

ic Re

su

lt

Da

ta

Mo

ni

tor

A

cti

ve

T

est

W

o

rk support

Co

nf

igu

rat

ion

CA

N Diag

Su

pp

ort Mn

tr

Door lock

DOOR LOCK

×

×

×

Rear window defogger

REAR DEFOGGER

×

×

Warning chime

BUZZER

×

×

Interior room lamp timer

INT LAMP

×

×

×

Remote keyless entry system

MULTI REMOTE ENT

×

×

×

Exterior lamp

HEAD LAMP

×

×

×

Wiper and washer

WIPER

×

×

×

Turn signal and hazard warning lamps FLASHER

×

×

Air conditioner

AIR CONDITIONER

×

Combination switch

COMB SW

×

BCM

BCM

×

×

×

×

×

Immobilizer

IMMU

×

×

×

Interior room lamp battery saver

BATTERY SAVER

×

×

×

Back door open

TRUNK

×

×

Vehicle security system

THEFT ALM

×

×

×

RAP system

RETAINED PWR

×

×

×

Signal buffer system

SIGNAL BUFFER

×

×

TPMS

AIR PRESSURE MONITOR

×

×

×

×

Panic alarm system

PANIC ALARM

×

DIAGNOSIS SYSTEM (BCM)

HAC-15

< SYSTEM DESCRIPTION >

[MANUAL AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

AIR CONDITIONER : CONSULT Function (BCM - AIR CONDITIONER)

INFOID:0000000010244859

DATA MONITOR

Monitor Item [Unit]

Description

IGN ON SW [On/Off]

Indicates condition of ignition switch ON position.

FAN ON SIG [On/Off]

Indicates condition of fan switch.

AIR COND SW [On/Off]

Indicates condition of A/C switch.

HAC-16

< SYSTEM DESCRIPTION >

[MANUAL AIR CONDITIONER]

SELF-DIAGNOSIS FUNCTION

SELF-DIAGNOSIS FUNCTION

Front Air Control Self-Diagnosis

INFOID:0000000009482465

A/C SYSTEM SELF-DIAGNOSIS FUNCTION

The self-diagnosis function is built into the front air control to quickly locate the cause of malfunctions.

DESCRIPTION

The self-diagnostic system diagnoses sensors, CAN system, and battery voltage on front air control. Refer to

applicable sections (items) for details. Malfunctions (if any are present) will be displayed in the form of turning

ON the A/C, MAX A/C, DEF and RECIRCULATION button LED’s. Refer to

HAC-16, "Front Air Control Self-

Diagnosis Chart"

.

SELF-DIAGNOSTIC MODE

1. Turn ignition switch ON.
2. Press the DEF/FOOT (

) and DEF (

) mode switches at the

same time and release on the front air control.

3. Press the FOOT (

) and RECIRCULATION (

) buttons

within two seconds to enter self diagnostic mode.

4. The mode (VENT, DEF/FOOT, FOOT and VENT/FOOT) LED’s

start flashing in a clockwise sequence indicating that Self test is

in progress.This takes about 17 seconds to complete.

5. All mode LED’s stay ON once self test completes.

6. Malfunctions (if any) will be displayed in the form of turning ON

the A/C, MAX A/C, DEF and RECIRCULATION button LED’s.

Refer to

HAC-16, "Front Air Control Self-Diagnosis Chart"

.

7. To exit diagnostic mode, press any button on the front air control.

Front Air Control Self-Diagnosis Chart

INFOID:0000000009482466

SELF-DIAGNOSTIC CHART

AWIIA0481ZZ

Button LED

Description

A/C

Evap sensor open

MAX A/C

Evap sensor short

DEFROST

Air mix door motor circuit malfunctioning

RECIRCULATION

Mode door motor circuit malfunctioning

MODE DOOR MOTOR

HAC-17

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

DTC/CIRCUIT DIAGNOSIS

MODE DOOR MOTOR

System Description

INFOID:0000000009482468

SYSTEM DESCRIPTION

Component Parts

Mode door control system components are:

• Front air control

• Mode door motor

• Position Balanced Resistor (PBR) (built into mode door motor)

• Intake sensor

System Operation

The mode door position (VENT, B/L, FOOT, D/F, and DEFROST) is set by the front air control by means of the

mode door motor. When a mode door position is selected on the front air control, voltage is applied to one cir-

cuit of the mode door motor while ground is applied to the other circuit, causing the mode door motor to rotate.

The direction of rotation is determined by which circuit has voltage applied to it, and which one has ground

applied to it. The front air control monitors the mode door position by measuring the voltage signal on the PBR

circuit.

COMPONENT DESCRIPTION

Mode Door Motor

The mode door motor is attached to the heater and cooling unit

assembly. It rotates so that air is discharged from the outlet as indi-

cated by the front air control. Motor rotation is conveyed to a link

which activates the mode door.

Mode Door Motor Component Function Check

INFOID:0000000009482469

SYMPTOM:

• Air outlet does not change.

WJIA1314E

WJIA1484E